PRELIMINARY ASSESSMENT AND PHASE I SITE INVESTIGATION REPORT for the GENERAL ELECTRIC COMPANY Bennett Street Site Lynn, Massachusetts PRELIMINARY ASSESSMENT AND PHASE I SITE INVESTIGATION REPORT for the GENERAL ELECTRIC COMPANY BENNETT STREET SITE LYNN, MASSACHUSETTS

Prepared for General Electric Company 1000 Western Avenue Lyn n, Massachusetts 01910

Prepared by Wehran Engineering Corporation 100 Milk Street Methuen, Massachusetts 01844

Wehran Project No. 08257.05

November 1988 GENERAL ELECTRIC COMPANY

TABLE OF CONTENTS (Page 1)

Page No.

1.0 INTRODUCTION 1-1

2.0 ENVIRONMENTAL SETTING 2-1 2.1 SITE LOCATION AND DESCRIPTION 2-1 2.2 SITE RECONNAISSANCE 2-2

3.0 SITE HISTORY 3-1 3.1 PROPERTY HISTORY 3-1 3.2 REGULATORY COMPLIANCE 3-3

4.0 FIELD INVESTIGATIONS 4-1 4.1 SOIL-GAS SURVEY 4-1 4.2 TEST BORINGS AND GROUNDWATER MONITORING WELL INSTALLATION AND ENVIRONMENTAL SAMPLING 4-2 4.2.1 Part 1 Activities 4-2 4.2.2 Part 2 Activities 4-4 4.2.3 Well Elevation Survey 4-5 4.3 GEOPHYSICAL SURVEYS 4-6

5.0 RESULTS OF FIELD INVESTIGATIONS 5-1 5.1 SOIL-GAS SURVEY 5-1 5.2 SUBSURFACE SOILS 5-1 5.2.1 Geological Assessment 5-1 5.2.2 Soil Analytical Results 5-2 5.2.3 Geophysical Survey Results 5-4 5.3 GROUNDWATER 5-6 5.3.1 Hydrological Assessment 5-7 5.3.2 Groundwater Analytical Results 5-8

6.0 SUMMARY AND CONCLUSIONS 6-1 6.1 SUMMARY 6-1 6.1.1 Site Description and History 6-1

30 11/88.0825705 GENERAL ELECTRIC COMPANY TABLE OF CONTENTS (Page 2)

Page No.

6.1.2 Subsurface Soil Conditions 6-2 6.1.3 Groundwater Quality and Usage 6-4 6.1.4 Comparison of Site Conditions to Interim Soil Policy 6-6 6.2 CONCLUSIONS 6-2

7.0 RECOMMENDATIONS 7-1

8.0 LIMITATIONS 8-1

9.0 REFERENCES 9-1

APPENDIX A - BORING LOGS

APPENDIX B - ANALYTICAL DATA

APPENDIX C - GEOPHYSICAL SURVEY DATA

APPENDIX D - CHEMICAL INFORMATION

APPENDIX E - PRELIMINARY ASSESSMENT FORM 87-2

30.11/88.0825705 GENERAL ELECTRIC COMPANY LIST OF FIGURES

Figure Follows Number Page No.

2-1 Site Location Map 2-1 2-2 Site Plan 2-1 3-1 Former Bennett Street Site Subdivisions 3-1 4-1 Soil-Gas Survey Locations 4-1 4-2 On-site Boring and Monitoring Well Locations 4-6 4-3 Off-site Boring Locations 4-6 5-1 Soil Headspace VOC Results 5-2 5-2 Magnetometer Survey - July 28, 1988 5-4 5-3 Magnetometer Survey - August 26,1988 5-4

LIST OF TABLES

Table Follows Number Page No.

3-1 Property History Summary 3-3 4-1 Groundwater Measurements Observed at the Bennett Street Site 4-4 5-1 Summary of Laboratory Analytical Results - Soil Samples, Part 1 and Part 2 5-3 5-2 Summary of Laboratory Analytical Results - Groundwater Samples, Part 1 5-8 5-3 Summary of Laboratory Analytical Results - Groundwater Samples, Part 2 5-8 6-1 Summary of Federal and State Drinking Water Standards and Health Advisories 6-5 B-1 Summary of Anaytical Results, Soil-Gas Survey - April 5, 1988 B-1

30.11/88 08257.05 1.0 INTRODUCTION

The activities conducted during this Preliminary Assessment and Phase I Site Investigation were intended to confirm whether or not the General Electric (GE) Bennett Street property located on Bennett Street in Lynn, Massachusetts is a disposal site under the 310 CMR 40.00 Massachusetts Contingency Plan (MCP). The GE Bennett Street site investigation was initially conducted as an environmental assessment under Massachusetts General Law, Chapter 21E (MGL Chapter 21 E)in support of a potential sale of the property. At the time, the site investigation was commenced in April, 1988 the MCP was not in effect. This final report has been formatted to now be consistent with the MCP disposal site investigation framework so as to be readily interpreted by regulatory agencies and the public. The scope of the originally proposed 21E environmental assessment was fully compatible with applicable MCP disposal site Preliminary Assessment and Phase I Site Investigation requirements under 310 CMR 40.541 and 40.543. Due to the initiation of this investigation as a 21E environmental assessment prior to the MCP being in effect, this report will serve several purposes. This report provides information for notification under 310 CMR 40.370 and serves as Preliminary Assessment Report. In addition, the recommendations in Section 7.0 serve as the basis for the proposed Scope of Work for completion of the Phase il Site Assessment. The scope of work for the Preliminary Assessment and Phase I Site Investigation included the review of readily available file information obtained from General Electric Company, the City of Lynn, Massachusetts, the Department of Environmental Quality Engineering (DEQE) Northeast Region and U.S. Environmental Protection Agency (USEPA) Region I, and performing a limited subsurface field investigations. This report includes: the site location and description in Section 2, the site history in Section 3, a summary of the field investigations in Section 4, the results of the field investigations in Section 5, summary and conclusions in Section 6; recommendations in Section 7; and limitations in Section 8. Boring logs are provided in

1-1 30.11/88.08257.05 Appendix A. Laboratory analytical data are provided in Appendix B, geophysical survey data in AppendixC, relevant chemical information in Appendix D, and Preliminary Assessment Form 87-2 is presented in Appendix E.

1-2 30.11/880825705 2.0 ENVIRONMENTAL SETTING

The environmental setting for the Bennett Street site is described in the following sections. The setting includes discussion of the site location and description and a site reconnaissance visit conducted early in the project.

2.1 SITE LOCATION AND DESCRIPTION The Bennett Street site is located on Bennett Street in Lynn, Massachusetts and is shown in Figure 2-1. The site occupies approximately 3.5 acres and is bounded by West Neptune street to the north, Elmwood Avenue to the east, Bennett Street to the south, Richard Street to the west, and the GE River Works property to the southwest. The parcel lies approximately 3,500 feet northwest of Lynn Harbor and 3,000 feet northwest of the Saugus River. The site is currently being used as a perimeter parking lot for GE employees and is covered by bituminous pavement. A chain link fence surrounds the site and access to the site is gained through a vehicle entrance which is located on Bennett Street. Sparse vegetation is present along the fence line and perimeter of the site. Based on information provided from a GE utilities map, dated February 28, 1958, a storm drain system and electrical cables underlie the site. The location of the storm drain system is identified in Figure 2-2. A number of residential properties lie adjacent to the site along Elmwood Avenue, Richard Street, West Neptune Street and Norton Street. Utilizing the records of the City of Lynn Tax Assessor's Office, these adjacent properties are shown in Figure 2-2. The site is located in the Saugus River drainage system. The site is relatively flat with no indication of a prominent slope direction. Surface water gathering on the property from precipitation and overland flow is likely to enter the storm drain network located on the property which leads to a main storm water system on Bennett Street. Properties in the vicinity of the site are connected to the City of Lynn public water supply system, which receives its water from the Ipswich and Saugus Rivers at points located at least 5.5 miles from the Bennett Street site.

2-1 30.11/88.08257.05 SCALE. I" - 2.083 TOPOGRAPHY TAKEN FROM FIGURE 2-1 LYNN. MASS. 1970 SITE LOCATION MAP cm- zs BENNETT STREET SITE U.S.G.S. QUADRANGLEBNETSRETIE GENERAL ELECTRIC 7 S MINUTE SERIES LYNN. MASSACHUSETTS QUADRANGLE LOCATION

WE PROJECT NO 06257.05 WEST NEPTUNE STREET

- - LEGEND

SITE BOUNDARY ----- PLU I" RESIDENTIAL PROPERTY WITH #59 LOT AND STREET NUMBER.

CATCH BASIN 0 MANHOLE STORM DRAIN SYSTEM-Taken from G.E. Utility Drawing dated August 26. 1970.

0 100 200

APPROXiMMATE SCALE IN FEET

BASE FROM PRELIMINARY G.E. PLAN DATED MAY 20L 1988. LU Wu I cdE A to

2 Le0

A I LOT 60l K - ~~~~~1 PPROXIMATE LOCATION OF THIRTEEN TANKS GENERAL ELECTRIC rAPPltOMATE LOCATION RIVER WORKS NORTH GUARD HOUSE (CITY LOT 58) FIGURE 2-2

SITE PLAN BLDG 87 BENNETT STREET SITE GENERAL ELECTRIC LYNN. MASSACHUSETTS.

WE PROJECT NO. 08257.05 Twelve (12) private wells are reported by a representative of the Lynn Water and Sewer Commission at scattered locations throughout Lynn serving both residential and commercial properties. All reported private wells are greater than 0.5 miles from the Bennett Street site, with most being several miles away. Current usage of the wells is unknown. Well data compiled by the USGS for eastern Massachusetts also indicates scattered private groundwater use in Lynn, Massachusetts. Specific street addresses are not provided in this listing. The USGS list indicates four wells utilized for domestic use, all of which were installed prior to 1928. It is not known whether current use was reconfirmed for the 1980 listing. The closest domestic use well to the Western Avenue site is indicated to be approximately 1.5 miles northeast of the site on Broad Street. Seven wells on the USGS listing are indicated as industrial usage. This category of usage is not defined to preclude drinking water uses. The nearest industrial use well is indicated to be over one third of a mile northwest of the site along Western Avenue.

2.2 SITE RECONNAISSANCE On April 5, 1988, Wehran personnel performed a site inspection at the Bennett Street site. During the inspection, visual observations were made of the site and the adjacent properties. No environmental problems or concerns were visually apparent at the property or at any of the abutting properties with regard to the presence of chemical or petroleum contamination. Furthermore, no evidence of previous chemical or petroleum releases were observed on the property. Concrete footings were observed near the Guard Shack on Bennett Street, indicating a possible location of a former above ground or below ground storage tank. Based on GE maps, these features are in the suspected area of thirteen (13) former underground storage tanks (USTs).

2-2 30 11/W08257.05 3.0 SITE HISTORY

A review of the history of the GE property now described as the Bennett Street site, former and current site usage and a summary of regulatory compliance activities at the site is provided in this section.

3.1 PROPERTY HISTORY The Bennett Street site is owned by the General Electric Company and is identified by the City of Lynn as part of City Lot 58 of Assessor's Maps 25 and 37. The GE River Works facility (North & South) is identified as City Lot 58 The approximate 3.5 acre site is zoned for heavy industrial use and currently is utilized as a perimeter parking lot for GE employees. The GE Bennett Street site (Figure 3-1) is comprised of 15 former individual parcels of land. Historical information obtained from City of Lynn files, GE files and the Lynn Historical Society were utilized to develop the following property history. The general area of the site and areas south of the site extending toward Lynn Harbor were formerly wetlands with tidal influences in the areas closer to the harbor. The wetlands in the site area existed until the early 1940's when filling was begun. Some fill material may have included foundry slag and waste sand containing some copper and brass scrap. Southern portions of the site were also reportedly filled with material containing clay. An auto repair shop reportedly occupied a parcel in the northwest corner of the site at 78 West Neptune in 1935 (northwest corner of area 15 on Figure 3-1). A 500 gallon UST is reported to have existed at this location under the cement floor. The current status of this tank is unknown, although no listing appears in City of Lynn or GE records. Reportedly, a farm was located across Neptune Street from the site prior to residential development of this area. City of Lynn and GE records mention Bennett Street Park which apparently was part of City Lot 58 (see area 15 on Figure 3-1) prior to GE's purchase of this main parcel in 1953. No conclusive documentation of the nature or usage of the park was identified, although city records indicate the site was vacant prior to 1953 with the exception of the auto repair shop in the northwest corner of the site. Following the GE purchase of this parcel in

3-1 30.11/88 08257 05 PARCELS INCLUDED IN BENNETT WEST NEP7TUNE STREET STREET SITE:

LOT 48,25 RIC-HARD STREET

GENERA L LOT4

ELECTRIC \FOMERLY CALDWELL

Co LOT 59

- LOT UNKNOWN

@ 119 LOT 34. 64 WEST NEPTUNE STREET NORTON ST LOT 34, 58 WEST NEPTUNE STREET

- LOT 35. 41 ELM WOOD AVENUE o LOT 36. 47 ELMWOOD AVENUE %u)w - @ LOT 86.75 ELMWOOD AVENUE @ LOT 87.79 ELMIWOOD AVENUE o LOT 35, 41 ELMWOOD AVENUE -- A - LOT 90, 163 BENNETT STREET

CITY LOT 58

.LuLu 0 100 2w

FE APPROXm SCALE. N FEET

0Z C) @C) r 50

N 'rST~REET GENERA ELECTRI BASE FROM PRELIMINARY G.E. GUARD HOUSE PLAN DATED MAY 2Q 1966.

FIGURE 3-1 BLDG 67 FORMER SITE SIBDIVISIONS

BENNETT STREET SITE GENERAL ELECTRIC CcameG WGM LYNN. MASSACHUSETTS.

WE PROJECT NO. 08257.05 1953, the area was paved and the indicated storm water drainage system installed. From the early 1950's to the early 1970's GE used portions of the property for automobile parking. During the early 1970's, GE needed additional employee parking space and acquired a number of residential properties adjacent to the original parcel of land, along Elmwood Avenue, West Neptune Street and Richard Street. These properties are shown in Figure 3-1. Information was lacking with regard to the property history for some of the parcels of land acquired by GE which lie along Richard Street. However, based on historical information provided by the City of Lynn for this area, the properties along Richard Street were zoned residential. The fifteen individual parcels include: Lot48, 25 Richard Street; Lots 46 and 47; the lot formerly known as Caldwell Court; Lot 59; Lots 34, 64, and 58 West Neptune Street; Lot 35, 41 and 47 Elmwood Avenue; Lot 87, 79 Elmwood Avenue; Lots88 and 85 Elmwood Avenue; and Lot 90, 163 Bennett Street. Review of available ownership records at the Essex County Registry of Deeds located in Salem, Massachusetts and review of available information provided by GE indicates that the usage of these properties had been for residential housing. The records also indicate that in the early 1970's GE demolished a number of residential homes on these properties and paved the vacant areas with asphalt to provide the desired additional parking space. The most significant finding is related to two underground storage tank (UST) areas in the GE River Works North property adjacent to the Bennett Street site to the west and southwest (see Figure 2-2). This larger General Electric Works North property was purchased by GE in the early 1900s. GE facility plans dated June 13, 1988 indicate one area containing thirteen 10,000 gallon out-of-service tanks each approximately 37 feet long by 7 feet wide in an area along the Bennett Street site property line extending northwest from the guard shack at the GE Bennett Street gate (see Figure 4-1). The tanks were reportedly installed in 1927. Due to relocation of the fenceline in this area, there is some confusion as to the exact locations of these tanks, however they appear to have been just outside the site boundary in this area. The tanks were reportedly used to store #2 and #4 fuel oil for plant boilers, and possibly gasoline.Fuel oil piping ranging in size from +inch

3-2 30.11/8808257.05 to 10 inches in diameter, connected these tanks to various utility locations in the plant. The second area includes two additional 10,000 gallon tanks located outside of the Bennett Street site boundary, south of the guard shack. These tanks are also indicated to have stored #2 fuel oil and been connected into this fuel oil distribution network. Records reviewed are not detailed enough to discriminate between above ground or below ground tanks at these locations. It is possible that some of the referenced tanks were installed above ground. The 13 tanks were reportedly taken out of service sometime prior to 1953. No records were found indicating when the other 2 tanks were taken out-of-service. GE facility records indicate that for some tanks, tops were cut off and the tanks filled with sand prior to the conversion of the site to plant parking in the early 1950's. A neighboring property owner has indicated that some tanks may have actually been removed, however there is no documentation to confirm this event. The date that these tanks were filled or removed is unknown. A general summary of the site ownership and history is provided in Table 3-1.

3.2 REGULATORY COMPLIANCE According to the U.S. Environmental Protection Agency (USEPA) Region 1, the site owner, General Electric, does not maintain an EPA RCRA Permit for handling or generating hazardous materials at the Bennett Street site. A number of companies northeast of the site along Bennett Street, were identified as currently holding RCRA permits. A review by Wehran personnel of hazardous waste and oil spill/leak files maintained by the DEQE Northeast Regional office in Woburn Massachusetts revealed no evidence of spills or leaks at the Bennett Street site or adjacent properties which impact the site. Review of the City of Lynn records and GE records did not provide any evidence as to the past registration or permitting of the 13 underground storage tanks located along the southwest corner of the Bennett Street site or two underground storage tanks located south of the Bennett Street gate.

3-3 30.11/88 08257.05 Table 3-1 GENERAL ELECTRIC COMPANY, LYNN PROPERTY HISTORY SUMMARY - BENNETT STREET

Dates Site Usage Owner

1880 Vacant with wetlands E.B. Johnson 1897 Vacant with wetlands Chase A. Moore, National City Bank early Vacant with wetlands Boston and Maine Railroad, 1900's early GE River Works North facility area General Electric 1900's adiacent to Bennett Street site was purchased, thirteen USTs installed in 1927 1935 Small parcel in northwest corner, at Unknown 78W. Neptune occupied by auto repair shop w/ 500 gal. UST 1953 Vacant and/or Park area (area 15, General Electric Fig.3-1) purchased by GE for plant parking area 1970 Many small residential lots (parcels General Electric 1-14) added to plant parking area

30 11/88082s7.05 4.0 FIELD INVESTIGATIONS

The purpose of the field investigations at the Bennett Street Site was to determine if the location is a disposal site under the MCP. The field investigation was designed to identify whether oil or hazardous material contamination in the form of a release or threat of a release has occurred or is likely to occur. The investigations performed included a site reconnaissance, soil gas survey, the drilling of test borings and installation of groundwater monitoring wells and geophysical surveys. As part of the overall field program, soil and groundwater samples were collected and analyzed by a certified laboratory for volatile organic compounds, and petroleum hydrocarbons. The field investigations were conducted in two parts. The scope of these field investigations meets or exceeds the Preliminary Assessment and Phase I Site Investigation basic requirements. The investigation provided detailed information that is more typical of a Phase 11Site Assessment, however, the full requirements of a Phase il Site Assessment as described in the MCP have not yet been completed.

4.1 SOIL-GASSURVEY A soil-gas survey was performed by Wehran personnel on April 5, 1988 at the Bennett Street Site. The purpose of the survey was to attempt to detect volatile organic vapors caused by the presence and/or lateral extent of volatile organic compounds in the underlying unsaturated soils (vadose zone) and/or contamination within the aquifer. Additionally, the survey was to aid in the selection of soil boring and groundwater monitoring well installation locations. The technique used during the soil-gas survey consisted of pounding a 0.5 inch diameter drive bar vertically downward through the pavement into the soils to a depth of two feet. The drive bar was then pulled upward, leaving a sealed testhole from a depth of one to two feet. After waiting approximately five minutes to allow gases from the surrounding soil to enter the testhole, the drive rod was removed and the probe of a PI-101 HNu photoionizer was immediately inserted into the testhole. The peak

4-1 30.11/88.08257.05 concentrations of volatile organic compounds measured by the instrument were recorded in the field log book. A total of forty-two (42) soil-gas points were measured during the survey at selected locations at the southern end of the site. A number of the soil testholes were positioned in the general area of the former 13 tanks as indicated on site plans from GE files. Selected soil-gas sampling points are indicated on Figure 4-1.

4.2 TEST BORINGS AND GROUNDWATER MONITORING WELL INSTALLATION AND ENVIRONMENTAL SAMPLING The drilling of test borings and the installation of groundwater monitoring wells was performed as two sequential phases of work, Part 1 and Part 2, at the Bennett Street site during the period from May 9 to July 26, 1988. The purpose of the test boring program was to investigate the presence and approximate vertical and horizontal extent of potential contamination in the subsurface soils and groundwater. The collection and laboratory analyses of soil and groundwater samples were included in both Part 1 and Part 2 activities.

4.2.1 Part 1Activities Part 1 drilling activities were performed at the site by Subsurface Technologies Inc. and observed by Wehran personnel from May 9 through May 12, 1988. The activities performed during this time period consisted of drilling eight (8) soil test borings and the subsequent completion of four of the borings as groundwater monitoring wells (MW5-1, MW5-2, MW5-3, and MW5-4). The borings and monitoring wells were drilled and completed at locations near the suspected storage tank area and at selected site perimeter locations. A truck mounted rig capable of hollow stem augering and soil sampling was utilized to complete the test borings. The four soil test borings (B5-1, 85-2, B5-3, and B5-4) were advanced to approximately 10 feet below the ground surface and approximately 2.5 to 3.0 feet below the top of the groundwater. Borings which were completed as groundwater monitoring wells were advanced to depths of approximately 16 feet below the ground surface. The borings were advanced using conventional drilling methods and

4-2 30.11/88.08257.05 WEST NEP T7JNE S 7R:FE T LEGEND m APPROXIMATE AREA OF SOIL GAS SURVEY, APRIL 6, 19m

GENERAL SUSPECTED TANK LOCATION- Taken from G.E. plan dated ELECTRIC June 13, 198

SG-12 SOIL GAS SURVEY LOCATlON Co 5.0 AND IDENTIFIER, WITH VOLATILE \ ORGANIC CONCENTRATION. IN ppm.--Results reported are those greater than I pprn. I--N NOR TON ST C-

BASE FROM PRELIMINARY G.E. PLAN DATED MAY 20, 1988

F- \4. 0 0 100 200 0 _ I_ A K-- APPROXIMATE SCALE. IN FEET 2 -4 I- I H----2

C) U-

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I

APPROXIMATE LOCATION OF THIRTEEN TANKS

GUARD HOUSE FIGURE 4-1

BLDG 67 SOIL GAS SURVEY LOCATIONS APPROXIMATE LOCATION OF TWO TANKS BENNETT STREET SITE

LYNN MASSACHUSETTS CONSWM PGINEM WE PROJECT NO. 08267.05 following accepted American Society for Testing and Materials (ASTM) Drilling Technologies. During the drilling of each boring, soil samples were collected continuously to the water table, and at five foot intervals, thereafter, using a 2 inch outside diameter split spoon sampler. Density measurements were also made utilizing standard penetration test methods. Each sample collected was visually inspected by the field geologist and classified in the field utilizing the Modified Burmister Method. The samples were then field screened by headspace analysis to determine if any volatile organic compounds (VOCs) were present. The field screening consisted of sealing the sample jars with aluminum foil and a metal lid and allowing time for the sample to reach thermal equilibration to ambient air temperature (approximately 700F). The lid was removed while the foil was kept on the jar and the probe of an HNu Model PI-101 photoionizer (10.2 eV prove) was inserted through the foil into the headspace of the jar. Elevated concentrations of VOCs detected in the field screening analyses were used to select soil samples for laboratory analysis. Soil samples submitted for laboratory analysis were collected directly from the precleaned split spoon sampler with a precleaned stainless steel trowel and placed in a clean container provided the laboratory. The samples were placed into a clean cooler with QA/QC samples, ice and completed chain of custody forms. The samples were then shipped to Cambridge Analytical Associates (CAA), a certified Massachusetts Laboratory for volatile organic analysis, SW-846 Method 8240. Boring logs for each of the borings and groundwater monitoring wells are included in Appendix A. Four groundwater monitoring wells were installed at the site. The wells were constructed using 2 inch inside diameter schedule 40 PVC riser pipe and a factory slotted 0.10 inch commercial well screen. The wells were installed to position a 10 foot length of screen 2.5 to 3.0 feet above and 7.0 to 7.5 feet below the observed water table, to allow for the detection of any free floating separate phase product. The screens were packed with silica sand to a minimum of two feet above the top of the screen. A bentonite seal was placed above the sand pack followed by a cement bentonite grout to the surface. The wells were completed by installation of a metal protective roadbox flush with the ground surface. Actual construction details are shown

4-3 30.11/88.08257 05 on the boring logs provided in Appendix A. All monitoring wells were developed with a pump until the water being purged appeared visually free of silt and sediment. Hydraulic conductivity tests were performed at two groundwater monitoring well locations, MWS-1 and MW5-4, using a Hermit Data Logger Model SE100B. On May 26, 1988, Wehran personnel collected groundwater samples at monitoring well locations MW5-1, MW5-2, MW5-3 and MW5-4. Prior to sampling at each location, the monitoring well cap was lifted and the head space at the top of the well was measured using an HNu PI-101 to determine the presence of any volatile organic compounds. Following well headspace screening, the water level in each well was measured using an electronic water level indicator. A summary of water level measurements observed during the project is provided in Table 4-1. Prior to collecting groundwater samples at each monitoring well location, the well water was purged by hand bailing. During purging water quality was monitored by conducting pH, temperature and specific conductance tests. Upon stabilization of readings from these tests groundwater samples were collected in sample containers provided by the laboratory. A field blank was collected by filling a cleaned bailer used for sampling with distilled water and transferring this water to a laboratory sample container as a quality control measure. In addition, a duplicate sample of MW5-2 was collected and submitted for laboratory analysis. All groundwater samples were placed into a clean cooler with ice and completed chain of custody forms. The samples were then shipped to CAA for volatile organic analysis, EPA Method 624. On July 2, 1988, Wehran personnel collected what visually appeared to be a floating organic layer at monitoring well location MW5-2. This sample was also packed in a cooler with a trip blank and ice and shipped to CAA for volatile organic analysis, EPA Method 624. Upon review of the Part 1 field investigation results it was deemed necessary to conduct an expanded Part 2 investigation. In particular, it was felt that the VOC analytical results did not agree well with the visual evidence of contamination and the headspace VOC results. In order to develop a more complete understanding of site conditions, the scope of a Part 2 investigation was developed, including the drilling of additional soil borings and

4-4 30 11/88 0825705 O

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ci installation of an additional groundwater monitoring well and additional soil and groundwater sampling and analysis.

4.2.2 Part 2 Activities Part 2 drilling activities were performed at the site by Subsurface Technologies, Inc., and observed by Wehran personnel from July 25 to July 27, 1988. The activities performed consisted of drilling thirteen (13) additional soil test borings (B5-5 thru B5-16), with one boring completed as an additional monitoring well (MW5-5), and collection of soil and groundwater samples for laboratory analysis. Four of the borings (B5-13 through B5-16) were drilled off-site, south of Bennett Street, to investigate potential downgradient soil and groundwater conditions. A fifth off-site boring (B5-12) was drilled in the area immediately west of the suspected 13 underground storage tanksarea. During the boring program, twelve (12) soil samples including a field blank and trip blank were collected and submitted to CAA for volatile organic analysis, SW-846 Method 8240 and to Clean Harbors Analytical Services for total petroleum hydrocarbons (TPH), EPA Method 503D/503E-B. Three (3) of the soil samples were selected for petroleum hydrocarbon fingerprint analysis using EPA Method 3550 and ASTM Method D3328. Part 2 groundwater sampling was performed by Wehran personnel on August 5, 1988. A total of four (4) groundwater samples were collected at monitoring well locations MW5-1, MW5-2 and MW5-5 and a sample of a floating organic layer at MW5-2. These samples were analyzed by CAA for VOCs, EPA Method 624 and by Clean Harbors Analytical Services for total petroleum hydrocarbons, EPA Method 503E/503B. The organic layer sample from MW5-2 was also analyzed for petroleum fingerprint by EPA Method 3550 and ASTM D3328. Drilling, well installation and sampling methodologies used during this phase utilized methods previously described under Section 4.2.1, Part 1 Activities. Due to the discovery of the organic layer in MW5-2, water level measurements taken in Part 2 utilized an oil/water interface probe to measure the depth of both layers in site wells.

4-5 30.11/88.08257.05 4.2.3 Well Elevation Survey A well elevation survey was performed by ASEC Corporation, a registered Massachusetts Land Surveyor, to establish vertical control to an accuracy of 0.01 feet. Elevations at the top of the protective casings used in Table 4-1, were determined by ASEC for Part 1 sample locations. Part 2 locations were surveyed by Wehran, utilizing the control previously established by ASEC. On-site soil borings and groundwater monitoring well locations are identified in Figure 4-2 and off-site locations in Figure 4-3.

4.3 GEOPHYSICAL SURVEYS A ground-penetrating radar (GPR) survey was conducted on July 22, 1988 and magnetometer surveys were conducted July 28 and August 26, 1988 by Wehran Engineering personnel at the Bennett Street site. The area of investigation covered the Bennett Street parking lot north of Bennett Street and paved areas adjacent to the lot inside the Bennett Street gate. The purpose of the surveys was to determine the locations of fifteen total abandoned underground storage tanks suspected to exist at the southwest corner of the site.. The GPR survey consisted of moving a 500 mega-hertz GPR antenna over areas indicated on original base maps to contain buried tanks and recording the reflected GPR signals. Raw data outputs are included in Appendix C. On July 28, 1988 a magnetometer survey was performed on 100-foot survey lines located relative to landmarks identified on the facilities plan. Magnetometer readings were made at 10-foot intervals along the survey lines, at a total of 100 locations. After the survey was completed,the magnetometer readings were averaged and the data was normalized to an average value of 53,825 gammas. The departure from the normal value was then plotted for each station and contoured. Raw data outputs are included in Appendix C. Because of the questionable location of the present fence lines and the tanks on the facilities plan, a second magnetometer survey was conducted on August26 which covered the southern end of the Bennett Street north parking lot. For this survey, a 140-foot by 200-foot grid was established north

4-6 30,11/88.0825705 WEST NEP TUNE S TREE T - 55-2 LEGEND

MWS-4 GENERAL S GROUND WAER MONI1RING WELL LOCATION AND IDENTIFIER ELECTRIC 85-4 0 SOIL BORING LOCATION AND IDENTIFIER Co. -N NORTON ST BASE FROM PRELIMINARY G.E.PLAN DATED MAY 20 1988 F - xv 0 100 200 N-7- APPROXIMATE SCAL., IN FEET A

~.1 ax tij Lu v--4 a5-6 r PAW"- 0 0 H---- a Cd 0U

ccz B5-5 0 F- e5-Il k--- 1 ZN 0% uws-1 0 \ B 5 B - - - 5- T STpEET \ws-2 \ -10 BENNt APPROXIMATE LOCATION OF \ 00 Q -. THIRTEEN TANKS 5 APPROXIMATE LOCATION - OF TWO TANKS -

GUARD HOUSE FIGURE 4-2

ON-SITE BORING AND MONITORING 67 r BLDG. WELL LOCATIONS BENNETT STREET SITE WaMRAN BNSHG GENERAL ELECTRIC LYNN, MASSACHUSETTS cceeR&TJaG WM

WE PROJECT NO. 06257.05 BENNETT STREET SITE CA T

I "e,\ Cl a 8-12

EET

APPROXIMATE gENNI / LOCATIN NOF THIRTEEN TANKS'> A 0RXIMATE LOCATiON B5-14 0 GUARD - HOUSE 85-13 0

BLDG 67 GENERAL ELECTRIC COMPANY

85-15 0

8p5-16 LEGEND 85-12 o SOIL BORING LOCATION AND IDENTIFIER

FIGURE 4-3

0 100 200 OFF-SITE BORING LOCATIONS APPROXIMATE SCALE. IN FEET BENNETT STREET SITE cHw 4GeG GENERAL ELECTRIC Cc~aIW Beta LYNN. MASSACHUSErTS

WE PROJECT NO. 08267.06 of the Bennett Street gate. Magnetometer readings were made at each of 163 stations, which were located every 20 feet (north to south) and every 10 feet (east to west). The readings were averaged and the data was normalized to an average value of 53,842 gammas. The departure from the normal value was plotted for each station and then contoured. Figures presenting the resultant magnetic contours are presented in Section 5.

4-7 30 11/88.08257 05 5.0 RESULTS OF FIELD INVESTIGATIONS

The results of the field investigations are provided in the following sections. Appendix A contains the boring logs, Appendix B contains the laboratory analytical data sheets and sample chain-of-custody sheets, and Appendix C contains the geophysical survey raw data. Chemical and physical data for groundwater contaminants are provided in Appendix D.

5.1 SOIL-GAS SURVEY Concentrations of total volatile organic compounds (VOCs) detected by an HNu PI-101 photoionizer during the soil-gas survey of the Bennett Street site, ranged from 0 to 10.0 ppm above background. Of the 42 total sample points, six selected points are mapped on Figure 4-1, to illustrate the locations where soil-gas VOC concentrations were detected signficantly above background levels. The soil-gas survey focused on the southern end of the site in the proximity of the suspected underground storage tank area. The soil-gas survey results are presented in Appendix B.

5.2 SUBSURFACE SOILS The condition of the subsurface soils at the site was investigated via test borings, soil headspace VOC analysis, and laboratory analysis of soil samples. The results of the subsurface soil investigations are presented in the following sections.

5.2.1 Geological Assessment The subsurface stratigraphy at the Bennett Street site, and the property directly south of the site, is indicated by the borings logs from 21 soil borings. Bedrock was not encountered in any of the borings, which were drilled to a maximum depth of 16 feet below ground surface. In general, the area is covered with pavement which is underlain by a fill layer and an alluvial layer. On the southern end of the Bennett Street site and the property south of the site, there is a third layer which varies from predominately sand to peat to clay. The bituminous pavement is approximately 0.5 feet to 8.5 feet in thickness. This unit consists of dark brown to light brown, medium to fine

5-1 30 11/88.08257.05 sand, some gravel, with trace silt. The darker sands are probably the waste foundry sands which were reportedly used as fill in this area. North and northwest of well MW5-5, the fill layer is underlain by alluvium. Although the alluvium layer extends beneath the entire study area, south and southwest of the well MW5-5, it is separated from the fill by the sand/peat/clay unit (described below). The bottom of the alluvium was never penetrated, however, the deepest borings indicate that it is greater than nine feet thick. It consists primarily of gray to brown, coarse to fine sand with little to some silt. As noted above, on the southern portion of the site area a third layer which ranges from 1.5 feet to 5.5 feet thick exists between the fill and alluvium layers. This layer varies from predominately dark brown, medium to fine sand at MW5-5 and 85-9 to brown peat and/or gray clay in borings on the property south of the site. The presence of peat and clay in these areas is consistent with reports that these portions of the study area were primarily wetlands prior to filling. Visual evidence of contamination observed during installation of soil borings was reported at MW5-2, MW5-5, and B5-8 and 85-12 near the thirteen USTs and at B5-13 near the two tanks south of the guard shack (off- site). Observations recorded on the boring logs in Appendix A include petroleum fuel oil odors (MW5-2 and B5-8) oil sheens on groundwater (MW5- 2 and 85-13) and dark stained or sticky soil (MW5-5 and 85-12). These observations were found predominantly in soils at depths of 5 to 7 feet (at, and directly above the water table), however, evidence of staining and oil sheens were found in some samples from 7.5 - 9.5 feet (85-12 and B5-13) and in one sample (MW5-5) at a depth of between 14-15 feet below land surface.

5.2.2 Soil Analytical Results Soil Headspace VOC Analysis The results of the soil headspace VOC field screening analyses are summarized on the boring and well logs in Appendix A. The concentration ranges for each boring are illustrated on Figure 5-1. The locations of the

5-2 30.11/88 08257.05 WEST NEPITUNE STREE T S5-2 LEGEND 0) MEWS-4 GENERAL GROUND WATER MONI1ORING WELL LOCATION AND IDENTIFIER 85-4 ELECTRIC 0 SOL BORING LOCAION AND IDENTIFIER Co. (0-17) HEADSPACE VOC CONCENTRATION RANGE. IN ppm-Measured by -A HNU Pi-101 NORTON STj BASE FROM PRELIMINARY G.E.PLAN DATED MAY 20. 1988

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(0) - Ioe I- r1)(4-11) MWS-5 * -8 a (0)5-12 0 B"9 I- ~4l (88-280)0O(1-56 T 0 o 'TT S T EE (36-58) .- - (2-50)0 0 0 (0-21) 85-14 n- GUARD HOUSE FIGURE 5-1 B5-13 C BLDG. 67 ~0-17) SOIL HEADSPACE VOC RESULTS BENNETT STREET SITE GENERAL ELECTRIC CONSIG ENGMERS LYNN. MASSACHUSETTS WE PROJECT NO. 06267.05 borings and monitoring wells from which the headspace samples were collected are indicated on Figures 4-2 and 4-3. Three categories of results are indicated; low VOC concentrations of 0 to 10 ppm, moderate VOC concentrations of 10 to 100 ppm, and high VOC concentrations of 100 ppm. High concentration headspace VOC readings were observed in soils at B5-7, B5-8, and B5-10. Moderate concentrations were observed in soils at B5-9, B5-11, MW5-2, MW5-5 and off-site locations, 85-12, B5-13, and 85-14. Low concentration headspace VOC readings were reported for all other borings. With the exception of B5-7 and B5-14, the high and moderate locations are grouped within approximately 75 feet of the suspected USTs location. B5-7 is approximately 200 feet north of the USTs location and had the highest concentration headspace VOC concentrations with values ranging from 160 to 440 ppm. B5-14 is approximately 350 feet (off-site) east of the USTs location with headspace VOC concentrations ranging from 0 to 21 ppm, with the highest concentration in the 0.5 to 2.5 feet depth sample. This distribution of soil-gas headspace VOC concentrations indicates that these two points may be representative of other localized VOC sources that may not be connected to the area of soil contamination near the USTs location. Groundwater monitoring well MW5-4 is the nearest sampling location to the former auto body shop (78 W. Neptune in 1935) as can be determined with available information. The absence of elevated soil headspace VOC concentration in soils at MW5-4 is not conclusive, however, indications are that no subsurface contamination is present at this location.

Laboratory Analytical Results Samples of soil encountered during test boring and groundwater monitoring well installation were collected and analyzed for VOCs, TPH, and petroleum hydrocarbon fingerprint laboratory analyses. The soil samples for laboratory analysis were selected based upon visual evidence of contamination and elevated soil-gas headspace VOC results. The analytical results for samples collected during Part 1 and Part 2 are summarized in Table 5-1.

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a e The soil samples selected for analysis were from the 5 to 7 feet depth layer with the exception of the sample for 85-5 which was from the 7 to 9 feet depth. The water table is at an approximate depth of 6 feet, which places the majority of these samples at or near the water table. The total VOC analytical results range from below the method detection limit to 1,100 pg/kg (ppb). The three highest total VOC values are 1,100 pg/kg (ppb) at 85-11, 1,000 pg/kg (ppb) at B5-9, and 735 pg/kg (ppb) at 85-12. The specific compounds detected in these samples include total xylenes and ethylbenzene with methylene chloride detected at the level of the method detection limit. Methylene chloride is a widely used laboratory solvent and as its presence is at levels very near the detection limit, it is possibly due to background laboratory contamination rather than representative of on-site contamination. The samples collected from B5-7, B5-8 and B5-9 showed lower levels of total xylenes, toluene and methylene chloride, ranging from 32 to 68 pg/kg (ppb) total VOCs. For these samples, methylene chloride was present at concentration greater than the detection limit, but still at low ppb levels, and may be representative of on-site contamination. Total petroleum hydrocarbon concentrations ranging from 300 to 4,900 mg/kg (ppm) were reported in the soil samples. The highest concentrations (>3,000 mg/kg) (ppm) were reported at B5-8, B5-9, B5-10, B5-11 and 85-13. Three of the soil samples were analyzed for petroleum hydrocarbon fingerprint to assist in the identification of the petroleum product source. #4 Fuel oil was identified at 85-8 and B5-13, however, no petroleum product was identified at 85-7. It is possible that what has been identified as #4 fuel oil, could be an indication of weathered or degraded lighter products such as #2 fuel oil.

5.2.3 Geophysical Survey Results Three geophysical surveys were conducted at the Bennett Street site in an attempt to confirm the location of the suspected USTs as indicated on General Electric facility plans. An interim report of the geophysical survey results was previously submitted to GE on September 7, 1988 and is included

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ii Ii ii in Appendix C. The following Figures 5-2, and 5-3 were originally submitted with the interim report. The ground penetrating radar (GPR) survey conducted on July 22, 1988 covered the area along the fenceline north-northwest of the Bennett Street gate in the suspected area of the USTs. The GPR signals showed a few subsurface metallic articles and soil interfaces but no indication of buried tanks was observed. GPR raw data is included in Appendix C. The lack of indication of the tanks in the GPR returns is consistent with the age of the tanks and activities related to their treatment in the past (i.e., sufficient time for extensive corrosion, some removed, some with open tops, and sand infilling). Sufficient depth of penetration to detect the tanks was achieved with the GPR on the basis of identifiable metallic targets at anticipated tank depth (see Appendix Cdata,) but tanks were not identified. GPR provides best results with targets that show large dielectric contrast with sharp boundaries, such as metallic materials in dry soil. If the tanks were subject to long term corrosion effects, material from the tanks could be distributed into the nearby soils and groundwater (making a diffuse boundary condition), and the corrosion products themselves might not be very different from the surrounding soils (or tank fill material ) in an electrical sense. Similarly, with the tank tops removed, the target presented to the antenna traverse at ground surface would be thin vertical elements enclosed between two soil boundaries and only marginally detectable in the radar returns. This would be particularly true if the tank bodies were corroded to any great extent. The GPR recordings were also examined for any regularities in signal returns that might indicate systematic orderly variation representing equally spaced changes in subsurface conditions (tank excavations, tank supports, piping, etc.), but none were observed. Since corrosion activities tend to concentrate at specific locales on structures or objects and then gradually spread out from those centers of activity, a magnetometer survey was recommended to determine if sufficient ferromagnetic material representative of the tanks was present in the subsurface. Some interference with the magnetometer effort could be

5-5 30 11/88.08257 05 expected because of the surficial ferromagnetic structures present (chain link fences, manhole covers, grates, bus stop awning, etc.). The initial magnetometer survey of July 28, 1988 resulted in the identification of two areas likely to contain buried ferro-magnetic materials northwest of the Bennett Street gate in the suspected area of the 13 USTs. These areas are indicated in Figure 5-2. The August 26, 1988 magnetometer survey covered an expanded area to further investigate the southern end of the Bennett Street site. The present fenceline location is not consistent with the GE facility plans which indicate the tank locations, therefore a bigger area of the site was investigated to assure that the southern end of the site was fully surveyed. Figure 5-3 illustrates the results of the expanded magnetometer survey and indicates four locations of ferro-magnetic materials at the typical depth for USTs and in the general proximity of the suspected tank locations. The magnitude of the magnetic results are much smaller than would be expected for the 13 tanks suspected to be at the site. These areas are labeled I, 11,111 and IV. The geophysical data show no evidence of the presence of any intact or essentially intact 10,000 gallon steel tanks beneath the areas examined. Neither the GPR or magnetic surveys show systematic patterns of returns that could reflect an orderly series of subsurface objects representing the thirteen tanks northwest of the entrance gate, or two tanks southeast of the gate. Both the GPR and magnetic survey do, however, indicate the presence of subsurface metallic objects. The magnetometer survey in particular, indicates several significant concentrations of ferromagnetic materials that may represent parts of steel tanks or sections of tanks that have retained some of their ferro-magnetic characteristics. The areas where such concentrations are indicated also correspond to test boring observations of subsurface soil contamination.

5.3 GROUNDWATER Groundwater at the site was investigated by the installation of groundwater monitoring wells which allowed measurement of depth, hydraulic conductivity analysis and the collection and analysis of

5-6 30 11188. 08257 05 groundwater samples for VOCs, TPH and petroleum hydrocarbon fingerprint analysis. The results of these investigations are presented in the following sections.

5.3.1 Hydrological Assessment Water level measurements in on-site groundwater monitoring wells indicate that groundwater is present under the site at depths ranging from approximately 5 to 7 feet below the ground surface (top of casing). The water table elevation ranges from 2.5 to 4.5 feet above mean sea level. Lower water table readings are reported at MW5-2 due to the depression of the water table at this well due to a floating organic layer, ranging from 1.6 to 2.4 feet thick. The presence of a 0.01 foot thick floating organic layer at MW5-1 was reported using the oil/water interface probe. Because a distinct organic layer was not observed during any of the on- site drilling activities, particularly during the installation of MW5-2, it is unclear whether this layer occurs normally at the site. It is possible that the disruption of subsurface soils during the drilling has allowed organic materials that were essentially immobile in soil to accumulate in the wells, giving a false indication of a floating organic layer. Based upon the water level measurements collected during the Part 1 and Part 2 field investigations (refer to Table 4-1), the predominant direction of groundwater flow across the site is easterly. Water level measurements collected on certain days show some variation from this flow direction. These variations may be attributed to the low hydraulic gradient at the site, and the presence of varying thicknesses of floating product in well MW5-2. In order to adjust water levels in this well to account for the fact that the water table is depressed by the organic layer, a correction factor was applied to the value reported in Table 4-1 based on an assumed oil density of 0.88 g/l. Inasmuch as the actual density of the oil is unknown, the adjusted water levels may not be accurate which could cause a slight change in our interpretation of the direction of groundwater flow. The flow pattern may also be a result of preferential flow towards areas which have been previously excavated and backfilled, i.e., subsurface tank or storm drain locations. Regional groundwater flow is expected to be toward the Saugus River and/or Lynn

5-7 30.11/88 082S05 Harbor, depending upon the site location within the City of Lynn. For the Bennett Street site easterly groundwater flow is towards Lynn Harbor. Hydraulic conductivity measurements at wells MW5-1 and MW5-4 resulted in calculated values of approximately 40 ft/day to 100 ft/day, respectively, using the Bouwer and Rice Method. These values are indicative of the medium to fine sandy soils observed in the field.

5.3.2 Groundwater Analytical Results The results of groundwater sample analyses are presented in Table 5-2 for Part 1 samples and Table 5-3 for Part 2 samples. Part 1 samples were analyzed for VOCs and Part 2 samples were analyzed for VOCs and petroleum hydrocarbons. Review of Table 5-2 indicates that low levels of VOC contamination were identified at MW5-2 (9 pg/l (ppb) total xylenes and 5 pg/I (ppb) toluene). VOC contamination was not apparent in any of the site monitoring wells in the Phase I (5-26-88) sampling event. Comparison of this low result to the visible evidence of soil contamination collected during installation of MW5-2 (see Table 5-2) and soil headspace VOC concentrations indicated an inconsistency between the soil conditions at the water table depth and the groundwater concentrations. The Part 2 field investigation was designed to resolve this inconsistency through additional soil and groundwater sampling and analysis. On July 7, 1988, a sample of a floating organic layer, not previously observed, was collected from MW5-2. This sample was found to contain 150,000 pg/l (ppb) ethylbenzene and 240,000 pg/ (ppb) toluene. These concentrations are very close to or greater than the solubilities of these compounds in water. The water table elevation measurements of July 7, 1988 and July 22, 1988 show this organic layer to be approximately 1.6 feet thick. By August 5, 1988,the organic layer had reached a thickness of approximately 2.4 feet. A quality assurance review of the Part 1 field blank sample result has determined that the most likely source of the 380 pg/I (ppb) of methylene chloride in the field blank sample is residue from a solvent rinse of the sample bottle resulting from incorrect sample bottle preparation in the laboratory.

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- A 0 L Sample bottle preparation for VOCs typically includes no organic solvent usage. Apparently, an inappropriately prepared bottle was used for this one sample. In Part 2, (see Table 5-3), groundwater samples were collected from monitoring wells MW5-1, MW5-2 (groundwater and organic layer), and MW5-5 to further investigate the organic contamination identified in Part 1. No detectable VOCs and very low concentrations of total petroleum hydrocarbons (TPH), 0.6 and 1.9 mg/I (ppm), were found in MW5-1 and MW5-5, respectively. A total VOC concentration of 54 pg/I (ppb) resulting from total xylenes, was identified in the groundwater from MW5-2, following purging of the organic layer from the well. The organic layer was sampled prior to purging ,and laboratory analysis indicated 160,000 pg/l (pb) ethylbenzene and 220,000 pg/l (ppb) total xylenes, similar to concentrations detected in the Part 1 sample. The petroleum hydrocarbon fingerprint analysis result for this organic phase did not produce a clear match to a specific petroleum product, however, hydrocarbons were present with weights (Cg-C18) similar to a #2 Fuel Oil. This fingerprint result with the TPH concentration for this sample of 840,000 mg/l (ppm), further indicates the likelihood that the organic layer is a petroleum product, most likely #2 fuel oil.

5-9 30.11/88.08257 05 6.0 SUMMARY AND CONCLUSIONS

The findings and conclusions of the GE Bennett Street site Preliminary Assessment and Phase I Site Investigation are summarized below. An integrated presentation of findings and conclusions is provided. No separate discussion of the Preliminary Assessment or Phase I Site Investigation results is presented other than the PA Form 87-2 attached as Appendix E. The summary covers the site description and history, subsurface soil conditions, groundwater quality and a comparison of site conditions to the Massachusetts DEQE Interim Policy for Management of Residuals under M.G.L. Chapter 21E from Spills/Releases of Virgin Petroleum Oils, dated 12/22/87 (Interim Soils Policy). In addition, conclusions regarding the site conditions and the status of the site with regards to the release or threat of release of oils or hazardous material(s) are presented. The comparison of soil sample analytical results to the Interim Soils Policy is provided since the contaminant source is indicated to be former virgin petroleum underground storage tanks and since the guidance levels provided in the Interim Soils Policy are, at present, the only available soil contamination guidance levels issued by Massachusetts DEQE.

6.1 SUMMARY The summary discussion is organized into four sections covering the site description and history, condition of subsurface soils, groundwater quality and usage, and an interpretation of the Interim Soils Policy guidance with regards to the GE Bennett Street site.

6.1.1 Site Description and History The GE Bennett Street site is currently a perimeter parking lot for employees and is surrounded by chain link fencing with a storm water drainage system underlying the paved parking area. The site is relatively flat and is surrounded by residential property to the north, east, and west, and the GE River Works North facility on the southwest and south. Available information indicates that the site was formerly a wetlands area, possibly utilized as a park. An auto body shop with a 500 gallon fuel oil UST was reportedly located in the northwest corner of the site on West

6-1 30 11/8808257.04 Neptune Street in 1935. No contamination was identified in this area as indicated by samples collected at MW5-4. The main site parcel was purchased by GE in 1953 for parking and subsequent residential parcels were added to the site in the early 1970s. The site was paved for use as a parking lot. Adjacent to the site along the boundary northwest of the GE Bennett Street entrance guard shack, were located thirteen 10,000 gallon USTs for petroleum products which included #2 fuel oil, possibly #4 fuel oil and gasoline. Two additional 10,000 gallon USTs reported to have stored #2 fuel oil, were formerly located south of the site. The tanks are reported by GE to have been installed in 1927. Some tanks may have been removed and others may have been closed by having the tank tops cut off and then filled with sand. Some tanks may have been installed above ground, however, conclusive information is not available. Details regarding dates of these operations and specific numbers or locations of tanks which were removed or filled have not been identified. These tanks appear to be the source of petroleum contamination on the GE Bennett Street site.

6.1.2 Subsurface Soil Conditions Boring and well logs indicate that the site is underlain by several stratigraphic layers, including: 0.5 feet of bituminous (asphalt) pavement, a fill layer ranging from 4.5 to 8.5 feet thick consisting of dark to light brown, medium to fine sand, some gravel with trace silt, and an underlying alluvium layer consisting of gray to brown, coarse to fine sand with little to some silt. Between the fill and alluvium layers at the south end of the site is a discontinuous sand and peat unit, from two to three feet thick, consisting of dark brown, medium and fine sand with some peat. This stratigraphy correlates well with the site history as a former wetlands previously filled with materials including foundry sands. Analytical results of the soil headspace VOC analyses, and laboratory VOC, TPH and petroleum hydrocarbon fingerprint analyses indicate that a petroleum release has occurred at the site. The major source of the release appears to be thirteen 10,000 gallon USTs suspected to be located along the site property boundary to the northwest of the GE Bennett Street entrance guard shack. Also, two UST tanks south of the guard shack (off-site) along

6-2 30.11/88.08257.04 the plant fenceline are possible source areas. Former UST usage appears to have been primarily for storage of #2 fuel oil and #4 fuel oil, however, there is a possibility that some tanks were used to store other petroleum products such as gasoline. The conditions of these tanks are currently unknown, however, geophysical surveys do not indicate the presence of intact tanks in the suspected areas. The geophysical surveys do show magnetic anomalies of sufficient strength in the area northwest of the guard shack to represent partial tanks, but does not clearly represent thirteen tanks. The geophysical data also does not indicate the presence of intact or partial tanks south of the guard shack where two tanks are suspected to be located. Visual evidence of soil contamination was reported at drilling locations near the suspected location of the thirteen USTs, including MW5-2, BS-8, MW5-5, B5-12, and off-site near the two tanks south of the guard shack (B5-13). These observations included petroleum odors, oil sheens on groundwater, and dark stained soil. Most of the observations were reported in soils at water table depth, 5-7 feet below the ground surface, however, some observations of potential contamination were reported at depths to 15 feet. Soil headspace VOC analyses indicate soil concentrations ranging from 50 to 280 ppm total VOCs (above background)in an area at the south end of the site within approximately 75 feet of the thirteen USTs suspected location. Specific volatile organic compounds identified in the laboratory analyses of the soil in this area include total xylenes, ethylbenzene, toluene and 2-butanone which are typical constituents of the volatile or lighter fraction of petroleum products, particularly gasoline and# 2 fuel oil. The highest concentrations reported are 450 pg/kg (ppb) ethylbenzene, 350 pg/kg (ppb) total xylenes, 10 pg/kg (ppb) toluene, and 40 pg/kg (pb) 2-butanone. Methylene chloride was also identified at low concentration in several samples. Several of the sample results appear to be due to laboratory contamination, however, others may be indicative of contamination at the site. The results of petroleum hydrocarbon analyses of soil samples in this southern area of the site indicate TPH concentrations ranging from 910 to 4,900 mg/kg (ppm). Petroleum hydrocarbon fingerprint analyses of soil

6-3 30 1/88.08257.04 samples from B5-8 and 85-13 indicate the presence of #4 fuel oil, which provides a qualitative characterization of the possible petroleum source material. The #4 fuel oil result may be an indication of degraded or weathered #2 fuel oil. Contamination was also identified at two locations more distant from the USTs suspected locations. At B5-7, approximately 200 feet to the north, soil headspace VOC concentrations of 160 to 440 ppm were reported and laboratory analysis detected 300 mg/kg (ppm) TPH in the soil. Low concentrations of total xylenes and toluene (at detection limit) and methylene chloride (may be result of lab contamination) were reported. The petroleum hydrocarbon fingerprint result for this samples was negative, indicating that the soil contamination could not be identified as a specific petroleum product. Given that this location is somewhat distant from the tanks, and the difference in analytical results from the sample points nearer to the tanks; (i.e., the highest headspace VOC concentrations, the lowest TPH concentration and inability to identify the presence of a petroleum product), it is possible that the contamination at B5-7 is localized and the result of a source other than the USTs. Potential contamination in the soil at B5-14 approximately 50 feet south and 350 feet east of the site (off-site), is indicated by the soil headspace VOC concentrations of up to 21 ppm (above background) in the soil from 0.5 to 2.5 feet below land surface.. Given that this boring is approximately 350 feet east of the suspected tank locations, and that no significantly elevated VOC concentrations were detected at depths where soils are in contact with the groundwater, it is not likely that the readings at this location are indicative of contaminant migration from the area of the suspected tanks. If contamination were migrating from the UST area to this point, it would be expected that volatile organic compounds would be transported via groundwater and be detectable in soils below or at the water table more so than near the surface. The potential contamination at B5-14 may be an indication of minor spillage or contamination from another source.

6-4 30.11/SB.08257.04 6.1.3 Groundwater Quality and Usage Groundwater analyses indicate that petroleum hydrocarbon contamination released into the soil at the site is in direct contact with groundwater under the southern portion of the site. A floating organic layer, similar to #2 fuel oil, approximately 1.6 to 2.4 feet thick, has developed in MW5-2. This layer was not initially apparent during well installation or in the Part 1 groundwater sampling event, and may not be naturally occurring. It is possible that this layer may be the result of localized migration of a mobile organic phase from the soil into the well casing. The organic layer was sampled twice and found to contain 220,000 to 240,000 pg/I (ppb) total xylenes and 150,000 to 160,000 pg/I (ppb) ethylbenzene. A very thin organic layer, 0.01 feet was detected in MW5-1, however, analytical data indicates no detectable VOCs in the groundwater at this location. Groundwater at the GE Bennett Street site is found at depths from approximately 5 to 7 feet below ground. Water level measurements from the five on-site monitoring wells indicate that the predominant direction of flow is toward the east. The low hydraulic gradient and localized depression of the water table at MW5-2 due to the floating organic layer causes some uncertainty in the determination of the flow direction. The water table underlying the organic layer at MW5-2 was sampled twice; during Part 1 prior to the appearance of the organic layer and following purging of the well in Part 2. Total VOC concentrations reported were 9 and 14 pg/I (ppb) in Part 1 and 54 pg/l (ppb) in Part 2. The volatile organic compounds detected were total xylenes and toluene. The increase in concentration from Part 1 in May 1988 to Phase 11in August 1988 may not necessarily be an indication of increased groundwater contamination, but may be an indication of incomplete purging of the floating organic layer during Part 2 sampling. The VOC concentrations are of the same order of magnitude, and all VOC concentrations are low. Groundwater usage in the City of Lynn, MA is reported to be limited in that the city public water supply is from surface water sources. The vast majority of drinking water use in the city is from the city public water supply, however, a small number of scattered private wells are reported to exist, according to the City of Lynn Water and Sewer Commission and the USGS.

6-5 30 11/8&08257.04 Some of these wells are listed as drinking water wells, however, review of well locations indicate that all listed wells are greater than 0.5 mile from the Bennett Street site and that most are several miles in distance from the site. Federal and state standards and health advisories for xylenes, ethylbenzene, and toluene are listed in Table 6-1. The standards are not strictly applicable to the site, since the groundwater is not used as a source of public drinking water supply. The floating organic layer concentrations are clearly above the listed standards, however, the underlying groundwater does not appear to be significantly contaminated by contact with this layer. The VOC concentrations in groundwater are below the federal and state drinking water quality standards, and at present, do not appear to pose a serious risk to human health.

6.1.4 Comparison of Site Conditions to Interim Soil Policy The area surrounding the site is a large urban/industrialized community, serviced by a public water supply. The groundwater is not used as a source of public drinking water, although isolated private use may be occurring. The regional groundwater quality beyond that identified in on-site monitoring wells is expected to show background concentrations of organic and inorganic contaminants typical of an urban/industrialized area. Some areas may be additionally affected by tidal mixing with saltwater. Based on the review of the site assessment results and the criteria listed in the Massachusetts DEQE Interim Policy, the Bennett Street site appears to lie in a "low environmental impact area". Remedial guidance levels for low environmental impact areas are equal to or less than 100 ppm VOCs in soil headspace analyses or 300 ppm total petroleum hydrocarbons (TPH). The data collected during this site assessment indicates that contaminated soil in the vicinity of the USTs at the site isthe historical residue of virgin petroleum products, (#2 and #4fuel oils and possibly gasoline). The on-site soil contamination concentrations (see Table 5-1) are greater than the prescribed remedial guidance levels for samples collected at B5-8, B5-10 and 85-7 based on soil headspace VOC analyses and for B5-5, B5-6, B5-8, B5-9, 85-10, B5-11, MW5-5 and B5-7 based on TPH analyses. Soil samples collected at the off-site soil borings, B5-12 and

6-6 30.11/88 08257.04 Table 6-1 GENERAL ELECTRIC, LYNN SUMMARY OF FEDERAL AND STATE DRINKING WATER STANDARDS AND HEALTH ADVISORIES (in pg/)

Standards/Advisory Xylenes Ethylbenzene Toluene

Proposed Maximum Contamination Level (MCL) - 10,000 700 2,000 Federal Safe Drinking Water Act Proposed Maximum Contamination Level Goal 440 680 2,000 (MCLG) - Federal Safe Drinking Water Act 1-day Exposure Health Advisory - Federal Safe 12,000 32,000 21,500 Drinking Water Act 10-day Exposure Health Advisory - Federal Safe 7,800 3,200 3,460 Drinking Water Act Long-Term Exposure Health Advisory - Federal Safe 620 NA 340 Drinking Water Act Lifetime Exposure Health Advisory - Federal Safe 440 680 2,420 Drinking Water Act

Maximum Contaminant Level (MCL) - Massachusetts 620 -- 340 Drinking Water Guidelines and Standards, 12-16-87

NA - Not available at this time -- - currently no standard for this compound

30.11/880852705 B5-13 also were above the low environmental impact area guidance level based on TPH analyses.

6.2 CONCLUSIONS Based upon the results of the Preliminary Assessment and Phase I Site Investigation, including the two part field investigation, a release of petroleum product to the environment is indicated to have occurred. The primary source of the release is indicated to be a suspected underground storage tank area, northwest of the GE Bennett Street entrance guard shack. The actual location and condition of the tanks has not been confirmed. The geophysical surveys show magnetic anomalies of sufficient strength in the areas northwest of the guard shack to represent partial tanks, but does not clearly represent the thirteen tanks that were present in the past. The geophysical data also do not indicate the presence of either partial or whole tanks southeast of the guard shack. The release appears to have contaminated soil above and below the water table. At present, the contaminated soil is covered by an asphalt parking lot and appears to pose no serious threatto human health. A 1.6 to 2.4 feet thick organic layer was detected floating on the water table at well MW5-2,. Total VOC concentrations of the floating organic layer measured approximately 390,000 pg/I (ppb) with a total petroleum hydrocarbon concentration of 840,000 mg/I (ppm). Contamination in two soil samples was identified as # 4 fuel oil which may be the degraded residue of the floating organic layer in MW5-2 which was tentatively identified as similar to #2 fuel oil. Laboratory analyses indicate the presence of total xylenes, ethylbenzene and toluene in the underlying groundwater at concentrations below Federal and State standards. The low concentrations in the groundwater when considered with the age of the site indicate that either the area of contact of the organic layer with the groundwater is small, or the mobility of contaminants from the organic layer to the groundwater is low, or both. These potential conditions do not appear to represent a serious threat to human health due to the present site conditions.

6-7 30,11/8808257.04 A second small area of on-site contamination at B5-7 was identified and may be due to a source other than the USTs. Investigation of the groundwater usage in the area results in the interpretation of the site as being located in a "low environmental impact area" as defined by the Interim Soils Policy. Comparison of observed soil concentrations to the Interim Soils Policy indicates that soil contamination is present at some locations at levels greater than the remedial guidance levels for "low environmental impact areas". One of the objectives of the Phase I site investigation is to provide information necessary for DEQE to classify a disposal site as priority or non- priority. The classification criteria are listed in 310 CMR 40.544. Review of these criteria against the results presented in this report indicates that the only criterion that could potentially cause the GE Bennett Street Site to be classified as a high priority site is whether there is uncontained, migrating, and free floating oil or hazardous materials in the groundwater at the site. The site investigations completed to date indicate some uncertainty as to the nature of the floating organic layer at monitoring well MW5-2 and as such making a decision regarding this layer is premature at this time. There are several questions remaining relative to making this determination. The questions include: whether this layer is naturally present since it developed over an extended period of approximately eight weeks following well installation, whether this layer is extensive or a small localized occurrence since it did not show-up in neighboring soil borings or other on-site wells, and whether migration of contaminants into the underlying groundwater is occurring since samples of groundwater from well MW5-2 collected after purging of the floating organic layer did not contain concentrations of volatile organics in excess of standards. Prior to the classification of this site, it is important to answer these questions, since it is possible that with clarification of these uncertainties, the site may be deemed a non-priority disposal site. The results of the Preliminary Assessment and Phase I Site Investigation provide a great deal of information which characterize the conditions at the GE Bennett Street site, however, a comprehensive understanding of the site has not yet been achieved. Review of all results from the Phase I Site

6-8 30 11/88.08257.04 Investigation indicate several data gaps. Recommendations are presented in Section 7 which describe technical activities required to address these gaps in the Scope of Work for the Phase 11Comprehensive Site Assessment. The data gaps are listed below:

1. The location and condition of the USTs have not been confirmed. It appears that intact or partially intact tanks do not exist at the site, although tank degradation has not been confirmed. 2. The soil contamination at 85-7 has not been determined to be connected to or separate from the UST and may be localized contamination from another source. 3. The origin and extent of contact of the floating organic layer on the water table, beyond that observed in MW5-2, is unknown, as is the migration potential of contaminants in this layer. The classification of the site as priority or non-priority can not be determined until this data gap is filled. 4. The lateral and vertical extent of soil contamination has not been adequately defined. 5. The on-site groundwater flow direction is uncertain due to the low hydraulic gradient and the depression of the water table at MW5-2 caused by the floating organic layer at this location.

6-9 30 11/88.08257 04 7.0 RECOMMENDATIONS

Based on the conclusions of the GE Bennett Street Preliminary Assessment and Phase I Site Investigation, the following recommendations are presented. These recommended actions are designed to comply with the requirements of the Massachusetts Contingency Plan for disposal site clean-ups. As required under 310 CMR 40.536 approval of the Phase II Site Assessment Scope of Work is required prior to proceeding with the next phase of site remediation. Also, due to the uncertainties in the characterization of the floating organic layer, it is recommended that classification of the site as a priority or non-priority disposal site be delayed until additional information is collected in the Phase 11Site Assessment. Due to the uncertainty in the disposal site classification, it may be useful to discuss with DEQE the implementation of public involvement under 310 CMR 40.543(4) following the submittal of this Phase I Site Investigation Report. It may be appropriate to delay or modify the required notice and press release, until disposal site classification can be accurately determined. Based upon the data gaps listed in the conclusions and the requirements of the MCP, a list of recommended activities is presented below:

1. Prepare a Scope of Work for the Phase II Site Assessment. The Scope of Work should address the following recommended additional field investigations:

a. Conduct test pit excavations at locations of magnetic anomalies and optionally, at suspected tank locations to confirm or refute existence and conditions of tanks, subsurface soil and the floating organic layer. b. Install additional soil boring(s) at selected locations to further define the extent of subsurface soil contamination. c. Collect floating organic layer samples for density analysis to allow accurate water table elevation calculation at MW5-2. d. Collect additional water table elevation measurements from all five on-site wells with oil/water interface probe, and

7-1 30.11/88.08257.05 inspect MW5-1, MW5-2, and MW5-5 for changes in floating organic layer thickness. e. Sample and analyze additional groundwater samples from MW5-1, MW5-2 and MW5-5 to further characterize groundwater contamination.

2. Classify site as priority or non-priority disposal site based upon the further characterization of the floating organic layer from information collected in Item 1 above.

3. Conduct exposure assessment and risk characterization to determine risk or harm to human health and to safety, public welfare and the environment.

4. Prepare Phase 11 Comprehensive Site Assessment report in accordance with requirements of 310 CMR 40.545.

7-2 30 11/88.08257.05 8.0 LIMITATIONS

1. The observations described in this report were made under the conditions stated herein. The findings presented in the report were based solely upon the services and information described therein, and not on scientific tasks or procedures beyond the scope of described services.

2. Except as specified in the report, Wehran did not perform physical, chemical, or biological testing or analyses to determine the presence of any hazardous constituents at the site.

3. Observations were made of the site as indicated within the report. Where access to portions of the site was unavailable due to physical limitations or obstructions, Wehran renders no opinion as to the presence of hazardous materials, or to the presence of indirect evidence relating to hazardous materials on the property.

4. The objective of this report was to provide data consistent with the Massachusetts Contingecy Plan (MCP) 310 CMR 40.00 for the Bennett Street Site owned by General Electric Company, Lynn, Massachusetts. Additional investigative site information which may not have been available to Wehran at the time of this assessment could possibly result in a modification of the findings stated above. This report has been prepared in accordance with generally accepted scientific practices. No other warranty, expressed or implied, is made.

8-1 30.11/88.08527.05 9.0 REFERENCES

A) U.S. Geologic Survey (USGS), 1983, Bedrock Geologic Map of Massachusetts

B) Gay B.F., and Delaney D., 1980: Hydrogeology and Water Resources of the Coastal Drainage Basins of northeastern Massachusetts, from Castle Neck River, lpswich to Mystic River, Boston, USGS, Atlas 589

C) City of Lynn Historical Society

D) Southern Essex Country Registry of Deeds, Salem, Massachusetts

E) City of Lynn Water Supply District; telephone conversation with Mark Guadano

F) City of Lynn Water and Sewer Commission

G) Site visit by Wehran personnel

H) General Electric Company files on Site Acquisitions

I) City of Lynn, Assessor's Office records review

J) Topographic Map of the Lynn Quadrangle USGS 7.5 Minute Series, 1966, (Photo revised 1979)

K) File review and conversation with MA DEQE personnel.

L) U.S. Geologic Survey, Massachusetts Hydrologic - Data Report No. 21 "Hydrogeologic Data of the Coastal Drainage Basins of Northeastern Massachusetts, from Castle Neck River, Ipswich, to Mystic River, Boston", 1980

M) Bouwer, Herman and R.C. Rice, "A SluG Test for Determining Hydraulic Conductivity of Unconfined Aquifers With Completely or Partially Penetrating Wells"

9-1 30.11/88.0825705 APPENDIX A

BORING LOGS WEHRAN ENGINEERING TEST BORING LOG

coNStTING ENGINEERS EBORING NO. B - - - 1 PROJECT: BENNETT STREET SITE SHEET NO. I OF I CLIENT; GENERAL ELECTRIC. LYNN. MA JOB NO. 08257.05 BORING CONTRACTOR : Subsurface Technologies Inc. - Core Environmental ELEVATION GROUND WATER CAS. I SAMP I CORE TUBE DATE STARTED 5/12/88 DATE TIME WATER ELEV. SCREEN INT, DATE FINISHED 5/12/88 NO WELL DRILLER Gary Twombly INSPECTOR Barbara Rilev

CLASSIFICATION REMARKS HNu (ppm) Black bitummus pavement 0.5' - FILL - Very densedark brown medium to fine SAND, trace Silt and Gravel. ------2.5' Medium densedark brown medium to fine SAND, trace Silt.

- ALLUVIAL SAND- Medium dense, gray medium to fine SAND. little Wet ( Silt.

END OF BORING AT 9.5 ft. No samples collected for laboratory analysis. Good recovery for each sample (>12") WEHRAN ENGINEERING TEST BORING LOG CONSLTWING ENGINEERS BORING NO. s-,- 2 PROJECT: BENNETT STREET SITE SHEET NO. I OF I CLIENT GENERAL ELECTRIC. LYNN. MA JOB NO. 08257.05 BORING CONTRACTOR Subsurface Technologies Inc. - Core Environmental ELEVATION GROUND WATER 1 CAS. I SAMP I CORE I TUBE DATE STARTED 5/12/88 DATE TIME WATER ELEV. SCREEN INT. DATE FINISHED r,p/gg NO WELL DRILLER Gary Twomblv INSPECTOR Barbar Ri.ev

CLASSIFICATION REMARKS HNu (ppm) Black bituminus pavement 0.51 - FILL - a Dense, dark brown fine SAND. little black Gravel.

2.5 Loose. dark brown, fine SAND, little Silt, trace 0.6 Organics.

5.0' Verv dense, rust brown to brown medium to fine Wet SAND. little Silt

0 7.0' - ALLUVIAL SAND - Medium dense, grav coarse to fine SAND. some Silt.

END OF BORING AT 9.5' No samples collected for laboratorv analvsis

Good recovery for each sample (>12") BORING LOG WEHRAN ENGINEERING TEST CONSLTING ENGINEERS BORING NO. B-,5-3

PROJECT: BENNETT STREET SITI SHEET NO. I OF CLIENT ; GENERAL I:LECTRC. LYNN. MA JOB NO. 08257.05 BORING CONTRACTOR: ELEVATION GROUND WATER TUBE DATE STARTED 5/12/88 DATE I TIME I WATEF DATE FINISHED 5/12/88 DRILLER Gary Twombly A I INSPECTOR Barbara Rilev

0.5' - FILL - Medium dense, dark brown medium to fine SAND, little Gravel and Silt.

5 5.0'

Loose, dark brown medium to fine SAND and trace Organics. Wet

7.5'

END OF BORING AT 9.5 ft. No samples collected for laboratory analysis.

Good recovery for each sample (>12") WEHRAN ENGINEERING TEST BORING LOG W CONSLaTING ENGINEERS BORING NO. B - -4 PROJECT : BENNETT S"'REET SITE SHEET NO. I OF 1 CLIENT : GEN:RAl. ELECTRIC. LYNN. MA JOB NO. 08257.05 BORING CONTRACTOR : Subsurface Technologies Inc. - Core Environmental ELEVATION GROUND WATER CAS. I SAMP. I CORE TUBE DATE STARTED 5/12/88 DATE FINISHED 5/12/88 DRILLER Gary Twomblv INSPECTOR for,.r Rile,

0.5' - FILL - Medium dense, dark brown, medium to fine and SILT. little coarse Gravel, trace brick.

5 Loose. dark brown, medium to fine SAND and SILT. little coarse Gravel. WVet

1' recovery

7.5' - ALLUVIAL SAND - Mledium dense, dark gray medium to fine SAND, little Silt

END OF BORING AT 9.5 ft. No samples collected for laboratory analvsis.

Good recovery for each sample (>12") IVEHRANENC'''"IENG CONSULING ENG!NE

PRJECT G.E. - Bennett Street

General Lnn M OTOR Subsurfac Technologiessr

*DATE WATER ELEv. ECREEN NT.

7*/25/8Initial Aprox. 6.7 ft. 1 . i below grade

0.5' NO WELL - FILL - INSTALLED Medium dense, brown, very coarse to coarse SAND. some pebbles.

S Loose. brown, coarse to very coarse SAND.

6.7' Approx. Water- Medium dense, brown, coarse to medium SAND, Table little very coarse Sand.

9' END OF BORING AT 9 ft. Soil samples for lab analysis taken from S-3

GE-B5--5S3-00l voc GE-B5-5-S3-0021 GE-B5-5-S3-003 - TPH

r r I%HIkN1 ; % ENGINEWNIG TEST BORING LOG j 'CONSUTINGENG22S BORING NO. B s G Bennett Street SHEET NO. I 0 I Lf ENT General llectric. Lvnn. MA JOB NO. 08527.05 I ELEVATION 14.80' ;c ONTPACTOR Subsurface Technologies Inc. GOUND AATER DATE STARTED 7/25/88 "ATE Tl/E I A TER LE. SCREEN INT. [T DATE FINISHED 7/25/88 DRILLER Kevin 25/881 [nitii Nprox. 7 ft. D MacDonald . I below grade INSPECTOR David G. Johnson

CLASSIFICATION REMARKS

PAVEMENT 0.5' - FILL - Medium dense, black and white. coarse SAND, with some red brick fragments.

------2.5' * -L LUoose, black, coars e SAND.------3.0' Medium dense, dark brown, medium and coarse 3.5' A N D ______

Loose. brown. coarse SAND. some medium and very coarse Sand. 12" n.01

Red bricked debris fragments at 8.0 ft. 9.5 12" 0.5 - ALLUVIUM - Medium dense, light brown, medium SAND. END OF BORING AT 9.5 ft. Took soil sample for lab analysis * LV from S-3 GE-B5-6-S3-00l1 vOC GE-B5-6-S3-002 GE-135-6-S3-003>TPH a r I 2

F=' WEHRAN ENG!NEEP'N!G TEST BOR!NG LCG U~Tt -CONSULTINGENGINEERS BORING NO. B5-7 jPROJECT:G.E. - Bennett Street SHEET NO. ' C 1 I LI.;T : General Electric, Lynn. MA JOB NO. 08527.115 -w 0 DRHINCONTRACTO Subsurface Teclnologies. Inc. ELEVATION 15.37' GROUND WATER I TUBE I DATE STARTED T/95/RR gOAT: ITiM/E WATER ELEV. I SCREEN iNT. Il TYI DATE FINISHEC .. ,, DRILLER Kevin %acDnrld 7NSPECT- ,

0.5' - FILL - NO 'IVILE Medium dense. dark brown, medium SAND, some very coarse and coarse Sand, little pebbles.

Is 3.5'

Loose, dark brown. medium SAND, some coarse Sand.

8.5' 8.0'

9.5'

END OF BORING AT 9.5 ft. Took soil samples for lab analysis from S-3

GE-B5-7-S3-001] GE-B5-7-S3-002 va. GE-B5-7-S3-003 > TPH GF-B5-7-S3-004 > Fingerprint -Z WEHRAN ENGINEE"NG TEST BORING LOG CONSULTING ENGINEERS BORING NO, B5-8 PROJECT G.E. - Bennett Street SHEET NO. I OP I iENT: General Electric, Lynn. MA JOB NO. 08577,05 }ELEVATrN u.I.6 C'THA . Subsurface Technologies Inc. 1 4 ,6 6 ' GROUD WATEn : DATE STARTED775g !,TE InE WATER PKEV. SCREEN INT. T / DATE FINISHED 7/25/88 17/25/88 Initial Approx. 7 ft. D DRILLER Kevin MacDonald below grade w INSPECTOR David G. Johnson

WE LL SA LE ON NO. TYPE 6 INCHEI

NO WELL 6 CONSTRUCTED S-1 SS 8 74 i5 Mledim der S-2 SS 1 coarSe sand

- s-3 Ss - -- -- Loose. dark 2very coarse

s- 4S

10 END OF BC

-2 WEHR^N/ EN!NEER!NG TEST BORING LOG I \.. - CONSULTIN, ENGINEErS BORING NO. B5-9 PRO 0T :G.E. - Bennett Street SHEET NO. I OF I 3 CLENT : cGeneal Electric. Lynn. M1A JOB NO. 08527.05 ELEVATION * > CONTRACTO.- : Subsurface Technologies Inc. 14.37' GROUND WATER DATE STARTED 7/25/88 I I7ME WATER ELEV. SCREEN NT, T DATE FINISHED 7/25/88 7/A /8 Initial Approx. 7 ft. DRILLER Kevin MacDonald below grace INSPECTOR David G. Johnson

HNu REMARxS 'Wead- REC Space .25'

NO WELL - - FILL - CONSTRUCTED Medium dense, dark brown. medium SAND, trace pebbles and rock fragments 6" 17

S-2

5 --

5.8' S-3

7.5'

S-4 9.5'

END OF BORING AT 9.5 ft. Took soil samples for tab analVsis from 6 ft. - 7 ft.

GE-B5-9-S3-001 ) GE-B5-9-S3-002 V K GE-B5-9-S3-003 > TPH

20 WEHRAN ENGINEERING CONSULTING ENGINEI'3

FRO- ^TG.E. - Bennett Street General Electric . Lvnn. MA I RING CONTRACTOR Subsurface TechnoloiesIc GRODw: VWATEP DATE TIME WATER ELEV, SCREEN INT. T I 7/26/8 Initial Aprox.rt. 7 LI I I below grade jI

PAVEMENT 0.5' - FILL - SAND, some NO W ELL Dense, dark brown, medium and fine CONSTRUCTED rock and wood fragments.

------2.5' Dense, dark brown. medium SAND, with little coarse Sand and trace of yellow fine Sand.

------50 Very loose, black, medium SAND, trace coarse Sand.

7.0' - ALLUVIUM - Loose, dark brown, medium SAND. ------9.2' Medium dense, brown, coarse SAND, some medium Sand. 9.5' END OF BORING AT 9.5 ft. Took soil samples for lab analysis from S-3.

GE-B5-10-53-00l1 VOC GE-B5-10-S3-002 GE-B5-10-S3-003 > TPH - \\.7vW\VEHRAN ENG|NEEQ:NG TEST BORING LOG CONSULTN4. ENGlN'Fm BORING NO. BS-11

PRO L ^ , G.E. - Bennett Street I L1eneral Electric. Lynn, \lA ff--AATO F Subsurface Technologies Inc. 2ROUND ERR 7 - :T! - ELE. i SCREEN INT. 7/26/8 Initial Aprox. f7t I Ibelow grade

0.5' NO WELL - FILL - CONSTRUCTED Medium dense, dark brown, medium and fine SAND. traces of small pebbles.

5.0'

a.l'

9.5' END OF BORING AT 9.5 ft. Took soil samples ftor lab analysis from S-3.

GE-B5-11-S3-001 VOC GE-BS-11-33-002

GE-B5-11-53-003 > TPI WEHRAN ENGINEERING CONSLJLNG ENC FRS

PROJECT G.E. - Bennett Street CLIENT :General Electric. Lynn. MA 501NGC0N7. TOH : Subsurface Technologies Inc. GROUND WATEf, ATE TIME I WATER .- Ev. SCREEN TYPE 7/26/88 Initial Approx. 7 ft. DA below grade I WT. FALL

EL SAMPLE CONSTRUCTION NO TYPE 6 INCu .3' - FILL - NO WELL CONSTRUCTED

loose, tan- mediun and fine SAND. ------e--- SAN---- 4 :0' .M-edium_ dense_. reddish-_bro n,_medium SAND'-. 45

Medium dense. dark brown, medium & fine SAND ------5.6' -29tes 1ii-ne SAND------6.3 - PEAT - Very soft PEAT 7.5' - ALLUVIUM - Medium dense, brown, medium and fine SAND Black stain 7.5-8.5'

END OF BORING AT 9.5' lab analysis

VOC

> TPH WEHRAN ENGINEER!NG CONSULTING ENGNEEP3

FROJECT : G.E. - Bennett Street CLLENi :General Electric. Lvnn, MA ECR:NG CONTRACTOR : Subsurface Technologies In 3rJjND NATER E 1!ME WATER ELIV. SCREEN INT. 1,27/88 Initial A prox. 7 ft. below grade

WELL SAMPLE CONSTRUCTN I - TvOBLOWS PER

0.5'

- FILL - Medium dense, dark brown, medium SAND. with traces of coarse Sand, red brick, wood, and cinders 2" plug of yellow/whit material at bottom of spoon at 4.5 ft.

7.5, Oily sheen observed on sample.

C 9.5' END OF BORING AT 9.5 ft. I Took soil samples for lab analysis from S-3.

VOC

3 > TPH

3-S3-004> Fingerprint WEHRAN ENGINEERING CONSLINS ENGINEEM

PR2JECT: G.E. - Bennett Street CLIENT General Electric, Lynn, MA PORING CONTRACTOR: Subsurface Technologies In GROWD WATER DATE E WATER EV, SCREEN i7/27/88 Initial Appro. 7 ft. I I below grade

.1PAVEMENT 0.51 - FILL - Medium dense, brown, medium SAND. 2.0' Loose. tan, medium SAND 3.0'

Verv soft, gray, SILT and CLAY.

5.0'

8.0'

9.5, END OF BORING AT 9.5 ft.

II I TEST BORING L.OG ENGlNEERI CONSULTNG ENG!NEERS BORING NO. 15-IS WEHRAN I C.r- Bennett Street SHEET NO. I O= I PtROJErCT .______E . - BennettG Street CLiEN: General Electric. Lynn. MA JOB NC. 08257.05 PORING CONTRACTOR : Subsurface Technologies Inc. ELEVATION 13.59 DATE CROUND . V TUBE STARTED 7/27/88 j ... 1 WATER ELEV. SCRFroN INT. DATE FINISHED 7/27/88 C0hL' E Kevin MacDonald ' below grade INSPECTOR n, G Tnnson

HNu I SAMP' F CLA'' FICATION REMARKS earcd-' REC space

0.51 - FILL - Medium dense, brown, very coarse and coarse CONSTRUCTEM SAND. 6" 0.0

2.5 p. _ Soft. brown, CLAY. trace coarse Sand. 10" 0.6 ------4.0 Loose, brown. coarse SAND.

..------5.5' Very soft, greenish-gray CLAY. 0.0

7.5 81 0 nohn n fine AND ane r71 AYX 8.0' - ALLUVIUM - S Medium dense, brown, medium SAND. 9.51 END OF BORING AT 9.5 ft.

5

i ENIERING \ ~-2WTRCONSULTING \^)HPANl ENGINEERS PROJECT :G.E. - Bennett Street CLIENT : General Electric, Lynn, MA FBOR ING -CONTACToR- Sub .urface Technologies Inc. GROU%.D WhATER DATE TIM-E WATER ELEV. SCREEN NT. T Approx. S ft. D below grade F

WELL SAMPLE CONSTRUCTiON NO. TYPE ER 2' NO WVELL - FILL - CONSTRUCTED Loose, brow n, very coarse and coarse SAND, some Pebbl es. 3 ------3.0'

-2 SS 23 Soft, gray, CLAY, trace Pebbles. 4 5.0'

bI Red brick fragments 1S Very soft, I S- at 5.0 ft. 8.51 S-4 SS Medium der 13 9. 5 END OF BORING AT 9.5 ft.

I ~I y

20 WEHRAN ENGINEERING TEST BORING LOG CONSUTING ENGNEERS BORING NO. %m PROJECT: BENNETT STREET SITE SHEET NO. I OF I CLIENT: GENERAL ELECTRIC. LYNN, MA JOB NO. 08257.05 BORING CONTRACTOR Subsurface Technologies Inc. - Core Fnvironmenta ELEVATION GROUND WATER CAS, SAM DATE STARTED 5/9/88 DATE TIME WATER ELEV. ISCREEN INT. 1j TYPE HSA Ss DATE FINISHED 5/9/88 Initial I IAoprox. 6 ft. GRILLER Gary Twombly below grade INSPECTOR Barbara Riley 5/26/8810:45 5.68 ft. below -'pbe 1r WELL 1i SAMPLE REMARKS CONSTRUCTION BLOWS PER CLASSIFICATION _ o NO. TYPE 6 INCHES Black bituminus pavement 0.5' - - FILL S- I SS -118 Very dense dark brown fine SAND, trace Gravel. glass and Silt.

2.51 Very loose. dark brown fine SAND. little Silt.

2 6 ft-watertable

9.0' - ALLUVIAL SAND - Dense, light brownish gray. coarse to fine SAND, trace Silt and fine Gravel.

Bottom of well at 14 ft.

KEY -6.0' 1) 2" Sch. 40 PVC END OF BORING AT 16 ft. No soil samples collected for screen slot (0.01") lahorat orv analysis 2) 2" Sch. 40 PVC riser. Groundwater sample collected on 5/24/88 for volatile organic 3) Ottowa silica compounds analysis sand. {GE5-G W-01-0011 4) Rentonite 5) Sacrete 6) Roadbox WEHsAN ENGINERNG TEST BORING LOG coNSING ENGNEERS BORING NO. Mw - I PROJECT: BENNETT STREET SITE SHEET NO. I OF I CLIENT: GENERAL ELECTRIC. LYNN. MA JOB NO. 08257.05 BORING CONTRACTOR Subsurface Technologies Inc. - Core Environmental ELEVATION GROUND WATER CAS. SAMR CORE TUBE DATE STARTED DATE TIME WATER ELEV. SCREEN NT. YPE HISASS \ , If DATE FINISHED 5/9/g IDn Initial Approx. 6 ft. 4--14ft. below DIA. 14" 2"OD I \ / I \ / DRILLER Gary Twombl below grae grae WT INSPECTOR - P 5/26/8 12:30 1 At. below FALL SAMPLE

NO. TYPEi S1LOWS6 INCHESPERE | 0.5' - FILL - Dense.dark brown fine SAND. little black Gravel, trace Silt.

Petroluem Odor

Loose. very dark gray medium to fine SAND. little fine Gravel and Silt. fuel oil at table. Soil sample colle 5'-7' for VOC GE5-SS-02-001

9.0' - ALLUVIAL SAND - Medium dense brown medium to fine SAND, little Silt.

------1 14.0' Very. dense. brownish grav fine SAND.

END OF BORING AT 16 ft. Groundwater samble collected on 5/?4/88 for volatile organte compounds analysis [G E5-G%-014-t 114] WEHRAN ENGINEEiNG TEST BORING LOG CONSULTIG ENGNEERS BORING NO. A - 3- PROJECT: BENNETT STREET SITE SHEET NO. I OF I LIENT : GENER 'L LECTRIC. ILYNN. MA JOB NO. 08257.05 ORING CONTRACTOR Substirface Technologies Inc. - Core Environmental ELEVATION GROUND WATER CAS. SAMP CORE TUBE DATE STARTED 5/11/88 DATE TIME WATER ELEV. SCREEN INT. TYPE lISA SS \ /\ DATE FINISHED 5/11/88

5A 11r: 6 ft I4 - 4 ft below DIA 2 O DRILLER T.bneoFL below gracle grace WT . Z 4 b I NSECTOR Barbara Riley ~ t S FALL. 3 07 5126/88 1 11:4,- 7 7l t._below WELL SAMPLE ONSTRUCTION BLOWS PEER CLASSIFICATION REMARKS HNu 0 NO. TYPE 16 INCHES Black bituminus pavement

- FILL - S-1 SS Very dense.brown fine SAND and black Gravel. 8 44 little Silt, trace concrete. I 2.5' Very loosedark brown fine SAND and SILT. 3" recoverv 0

------4.5' Medium dense. brown medium to fine SAND, little Silt. Swatertable

7.0' ALLUVIAL SAND - Medium dense.grav medium to fine SAND. some SILT.

14.0' (rutom of well END OF BORING AT 14 ft. No soil anmprs coHected for laborator inrni

KEY Good recovery for most samples (>12") 2" Sch. 411 PVC ocreen slot (11.014) Groundwater sample collected on 2) 2" Sc h. 40 PVC 5/26/88 for volatile organic riser. compounds analysis [GE5S-GlW-03-003 Ottown silica sand. 4) Bentonite Snecreic ) Roadbox WEHRAN ENGJNEERNG TEST BORING LOG CONSWNG ENGtNEERS BORING NO. N - -4 PROJECT : BENNETT STREET SITE SHEET NO. I OF I CLIENT : GENERAL ELECTRIC. LYNN. MA JOB NO. 08257.05 BORING CONTRACTOR : Subsurface Technologies Inc. - Core Environmental ELEVATION GROUND WATER CAS. SAMRI CORE TUBE DATE STARTED 5/11/88 DATE TIME WATER ELEV. SCREE DATE FINISHED 5/11/88 nitial Approx. 6 f1. 4-14 ft. DRILLER Gary Twombly below grade INSPECTOR Barbara Rilev 5/26/88 64,4 ft. below

WELL e SAMPLE CONSTRUCTION NO. TYPEL OWSn CLASSIFICATION REMARKS HNu NO 6 INCHES ppm) Black bituminus pavement 0.5' - FILL - Medium dense, brown medium to fine SAND. little Silt, trace coarse Sand. 0

2.5' Loose, brown medium to fine SAND. trace Silt. 0

5.0'

Medium densebrown. medium to fine SAND. trace Gravel. 2 Watertable 0

7.0' - ALLUVIAL SAND - Medium dense,gray coarse to fine SAND, little Silt.

------.------12.0' Medium dense, brown to rust medium to fine SAND and SILT

-14.0' END OF BORING AT 14.0 ft. No soil collected for Hot tom at well I, sample t 14.0 ft. laboratory analysis. Good recovery for each sample KEY (>12")

1) " Seh. 49 PVC Groundwater sample collected on slot (0.01") screen 5/26/88 for volatile organic 2) " Sch. 411P\ C compounds analvsis rier fGE5-GiW-02-0021 3) Ottowa silico sand 4) Ilenton tt 5) Sacrete 6) Roadhox \VEHRAN ENGNERING TEST BORING LOG CONSULTNO ENGINEPS BORING NO. MW5-5 SHEET NO. I PROJE -T G.E. - Bennett Street JOB NO. CLIENT : General Electric. Lynn. MA 08527.05 ELEVATIGN E9RING C':TRACTOR Subsurface Technologie Inc. 14.48' (PVC) TUBE DATE STARTED 7/26/88 GRS'Ut. WATER :ATE TlMELI WATER ELEV. SCREEN INT. SDATE FlNISHED 7/76/RR 17 /26/891 Initial Approx. 7 ft. DRILLER Kevi Maona INSPECTOr n..AA below grade

WELL O SAMPLE

NG. YPE I C

0.5T - FILL - Medium dense, dark brown, medium SAND. some fine Sand, trace Gravel.

5.5'

7.0' - ALLUVIUM - Medium dense, dark brown, medium SAND. some coarse Sand.

14.0' pose. brown, medium and fine SAND. Dark stain from 14.8'-15.3' 24' 2. ]sch. 411 PVC screen withb screw 16.0' [on bottom cap 12) 2" - Sci. 40 END OF BORING AT 16 ft. Took soil sample for lab analysis PVC casing. from S-3. 3) Roadbox 14) #18 rvtic GE-MlW-5-5-S3-001 voc I white silica sand GE-MW-5-5-S3-002] GE-MW-5-5-S3-003 > TPH 1Pack5) 2-Ben tonite pellet sen 6) 0..5'-('oncrete collar APPENDIX B

ANALYTICAL DATA Table B-1 GENERAL ELECTRIC COMPANY, LYNN Summary of Analytical Results - Soil Gas Survey, APRIL 5, 1988*

HNu VOC HNu VOC Soil Gas Location Readings (ppm) Soil Gas Location Readings (ppm)

SG-1 0.5 SG-22 0.2 SG-2 0.2 SG-23 0.2 SG-3 0.2 SG-24 2.0 SG-4 0.5 SG-25 0.2 SG-5 0.0 SG-26 0.2

SG-6 0.2 SG-27 0.2 SG-7 1.0 SG-28 0.4 SG-8 0.2 SG-29 0.2 SG-9 0.8 SG-30 0.2 SG-10 0.4 SG-31 0.2

5G-11 0.2 SG-32 0 SG-12 5.0 SG-33 0 SG-13 0.6 SG-34 5.0 SG-14 1.0 SG-35 0.5 SG-15 1.0 SG-36 0.6 SG-16 0.8 SG-37 2.0 SG-17 0.4 SG-38 0.6 SG-18 1.0 SG-39 10.0 SG-19 0.4 SG-40 2.0 SG-20 1.0 SG-41 0.4 SG-21 0.2 SG-42 0 Background concentration = 0.0 ppm

30,10/88.08257 05 Ln w 00 H 4 -

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Client: Wehran Engineering CHAS Lab #: 8807214-OIC Sample I.D.: GE-B5-5-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 1,500 mg/kg 08/02/88 503D/503E-B(b) oil & Grease by IR Total Solids 82.0 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight (leanHarbor5

Client: Wehran Engineering CHAS Lab #: 8807214-02C Sample I.D.: GE-B5-6-53-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 1,200 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 82.3 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight leaHarbors

Client: Webran Engineering CHAS Lab #: 8807214-03C Sample I.D.: GE-B5-7-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 300 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 85.2 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight ItleanHarbors

Client: Wehran Engineering CHAS Lab *: 8807214-05C Sample I.D.: GE-B5-8-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 3,800 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 90.9 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight *tleanHarbor5

Client: Wehran Engineering CHAS Lab #: 8807214-07C Sample I.D.: GE-B5-9-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 4,400 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 81.7 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight SleanHarbon

Client: Wehran Engineering CHAS Lab #: 8807214-08C Sample I.D.: GE-B5-10-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 4,900 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 80.7 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight jeanHarborj

Client: Wehran Engineering CHAS Lab #: 8807214-09C Sample I.D.: GE-B5-1l-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 4,700 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 68.1 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight tleanHarbors

Client: Wehran Engineering CHAS Lab #: 8807214-10C Sample I.D.: GE-MW5-5-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 910 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 60.4 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight (CleanHarbors

Client: Wehran Engineering CHAS Lab #: 8807214-11C Sample I.D.: GE-B5-12-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 1,700 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 75.4 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight 1leanlHarbors

Client: Wehran Engineering CHAS Lab #: 8807214-12C I Sample I.D.: GE-B5-13-S3-003 Date Received: 07/28/88 Sample Type: Soil

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 10 3,200 mg/kg 08/02/88 503D/503E-B(b) Oil & Grease by IR Total Solids 74.5 07/29/88 209F(b)

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight 'leanfHabors a

Client: Wehran Engineering CHAS Lab #: 8807214-14C Sample I.D.: GE-B5-12-FB-004 Date Received: 07/28/88 Sample Type: Water

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 0.1 0.4 mg/i 08/01/88 503E/503B(b) Oil & Grease by IR

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight leanHarbors

Client: Wehran Engineering CHAS Lab #: 8807214-04M Sample Station: GE-B5-7-S3-004 Soil Date Received: 07/28/88

Parameter Compound Result*

Petroleum Identification Kerosene None observed by GC-FID Capillary Mineral Spirits None observed Column Techniques Gasoline None observed Diesel Fuel None observed #2 Fuel Oil None observed #4 Fuel Oil None observed Crude Oil None observed Mineral Oil None observed Extraction Date: 08/01/88 Analysis Date: 08/02/88

Preparation Method: 3550, Analytical Method: ASTM Method D3328 "Comparison of Waterborn; Petroleum Oils by Gas Chromatography", Volume 11.02, 1985.

*No hydrocarbons indicated tleanlarbon

Client: Wehran Engineering CHAS Lab #: 8807214-06M Sample Station: GB-B5-8-S3-004 Date Received: 07/28/88

Parameter Compound Result

Petroleum Identification Kerosene None observed by GC-FID Capillary Mineral Spirits None observed Column Techniques Gasoline None observed Diesel Fuel None observed #2 Fuel Oil None observed #4 Fuel Oil Present* Crude Oil None observed Mineral Oil None observed Extraction Date: 08/01/88 Analysis Date: 08/02/88

Preparation Method: 3550, Analytical Method: ASTM Method D3328 "Comparison of Waterborr Petroleum Oils by Gas Chromatography", Volume 11.02, 1985.

*Hydrocarbons present with weight CI0 - C2 2 , similar in weight to a #4 fuel oil. tleanHarbors

Client: Wehran Engineering CHAS Lab #: 8807214-13M Sample Station: GE-B5-13-S3-004 Date Received: 07/28/88

Parameter Compound Result*

Petroleum Identification Kerosene None observed by GC-FID Capillary Mineral Spirits None observed Column Techniques Gasoline None observed Diesel Fuel None observed #2 Fuel Oil None observed #4 Fuel Oil ------Present* Crude Oil None observed Mineral Oil None observed Extraction Date: 08/01/88 Analysis Date: 08/02/88

Preparation Method: 3550, Analytical Method: ASTM Method D3328 "Comparison of Waterborn Petroleum Oils by Gas Chromatography", Volume 11.02, 1985.

*Hydrocarbons present with weight C9 - C2 8 similar in weight to a #4 fuel oil. ------

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* Method References

(a) "Methods for Chemical Analysis of Water and Wastes," Publication EPA-600/4-79-020, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati, 1979, revised March 1983.

(b) "Standard Methods for the Examination of Water and Wastewater," 16th ed., American Public Health Association, American Water Works Association, Water Pollution Control Federation, Washington, D.C., 1985.

(c) "Test Methods for Evaluating Solid Waste: Physical/Chemical Methods," 2nd ed., U.S. Environmental Protection Agency, Office of Solid Waste and Emergency Response, Washington, D.C., July 1982.

(d) "The Determination of Polychlorinated Biphenyls in Transformer Fluid and Waste Oils," Publication EPA- 600/4-81-045, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati, 1981.

(e) "EPA-CLP Organic Analyses of Low and Medium Hazardous Waste Sample (Water and Soil) Procedures Revision," U.S. Environmental Protection Agency, July 1985.

(f) "Test Procedures for Analyses of Organic Pollutants," Code of Federal Regulations, Appendix A, Part 136, July 1, 1985.

(g) "Measurement of Purgeable Organic Compounds in Drinking Water by Gas Chromatography/Maas Spectrometry," Method 524, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

(h) "Prescribed Procedures for Measurement of Radioactivity in Drinking Water," Publication EPA-600/4-80-032, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati, August 1980.

(i) "Clean Harbors Radiological Environmental Analytical Procedures," Clean Harbors Analytical Services, Braintree, MA, October 1985.

(j) "Methods for Chlorinated Phenoxy Acid Herbicides in Industrial Effluents," MDQARL, Cincinnati, November 23, 1973.

(k) "Annual Book of Standards," Section 11: Water and Environmental Technology. Vols. 11.01-11.04, American Society for Testing and Materials, Philadelphia, 1983, 1984, 1985.

(1) "Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater," U.S. Environmental Protection Agency, September 1978.

(m) "Methods for Organochlorine Pesticides in Industrial Effluents," MDQARL, Environmental Protection Agency, Cincinnati, November 28, 1973.

(n) Methods for Determination of Inorganic Substances in Water and Fluvial Sediments," Techniques of Water- Resources Investigation of the U.S. Geological Survey, Book 5, Chapter A-1, U.S. Department of the Interior, 1979.

(o) "Measurement of Trihalomethanes in Drinking Water by Gas Chromatography/Mass Spectrometry and Selected Ion Monitoring," Method 501.3, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

(p) "The Analysis of Trihalomethanes in Finished Waters by the Purge and Trap Method," U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati. (q) "The Analysis of Trihalomethanes in Drinking Water by Liquid/Liquid Extraction,' U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

(r) 'Official Methods of Analysis,' Association of Official Analytical Chemists, 14th ed., 1984.

(s) "Hach Handbook of Water Analysis," Hach Chemical Company, Loveland, CD, 1979.

(t) H.M. Prichard and T.F. Gesell, "Rapid Measurement of Rn-222 Concentrations in Water with a Commercial Liquid Scintillation Counter," Health Physics, Vol. 33, 1977, pp. 577-581.

(u) "Petroleum Products and Lubricants (I): D56-D1660," Annual Book of ASTh Standards, Volume 5.01, American Society for Testing and Materials, Philadelphia, 1985.

(v) "Petroleum Products and Lubricants (III): D2981-Latest; Catalysts," Annual Book of ASTM Standards, Volume 5.03, American Society for Testing and Materials, Philadelphia, 1985. 1 :2 I I 'K .4

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Client: Wehran Engineering CHAS Lab #: 8808099-0lC Sample I.D.: GE-5-GW-MW5-5-007 Date Received: 08/09/88 Sample Type: Water

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 0.1 1.9 mg/l 08/22/88 503E/503B(b) Oil & Grease by IR

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight tleanHarbors

Client: Wehran Engineering CHAS Lab #: 8808099-02C Sample I.D.: GE-5-GW-MW5-1-008 Date Received: 08/09/88 Sample Type: Water

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 0.1 0.6 mg/1 08/23/88 503E/503B(b) Oil & Grease by IR

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight tleanHarborn

Client: Wehran Engineering CHAS Lab #: 8808099-031 Sample I.D.: GE-5-GW-MW5-2-009 Date Received: 08/09/88 Sample Type: Liquid

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 2.0 840,000 mg/I 08/12/88 503E/503B(b) Oil & Grease by IR

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight ,leanliarbors

Client: Wehran Engineering CHAS Lab #: 8808099-04C Sample I.D.: GE-5-GW-MW5-2-010 Date Received: 08/09/88 Sample Type: Water

Analysis Method Number Parameter MDL Result Units Date and Reference

Petroleum Hydrocarbon 0.1 180 mg/1 08/22/88 503E/503B(b) Oil & Grease by IR

Notes: ND - Below minimum detectable level (MDL) Soil/solid samples based on sample dry weight teanHarbors

Client: Wehran Engineering CHAS Lab #: 8808099-03M Sample I.D.: GE-5-GW-MW5-2-009 Date Received: 08/23/88 Sample Type: Oil

Parameter Comnound Result*

Petroleum Identification Kerosene None observed by GC-FID Capillary Mineral Spirits None observed Column Techniques Gasoline None observed Diesel Fuel None observed #2 Fuel Oil None observed #4 Fuel Oil None observed Crude Oil None observed Mineral Oil None observed Extraction Date: 08/10/88 Analysis Date: 08/10/88

Preparation Method: 3550, Analytical Method: ASTM Method D3328 "Comparison of Waterborn Petroleum Oils by Gas Chromatography", Volume 11.02, 1985.

* Hydrocarbons present with weight C 9 - C1 8 similar to #2 fuel oil. C cxt~,

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Method References

(a) "Methods for Chemical Analysis of Water and Wastes,' Publication EPA-600/4-79-020, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati, 1979, revised March 1983.

(b) -Scandard Methods for the Examination of Water and Wascewater, 16th ad., American Public Health Association. American Water Works Association, Water Pollution Control Federation, Wasnington, D.C., 1985.

(c) --est Methods for Evaluating Solid Waste: Physical/Chemical Methods,- 2nd ad., U.S. Environmental Protection Agency, Office of Solid Waste and Emergency Response, Washington, D.C., July 1982.

(d) '"he Determination of Polychlorinated Biphenyls in Transformer Fluid and Waste Oils." Publication EPA- 600/4-81-045, U.S. Environmental Protection Agency, Environmental Monictring and Support Laboratory. Cincinnati, 1981.

(a) "!PA-CLP Organic Analyses of Low and Medium Hazardous Waste Sample (Water and Soil) Procedures Revision,' U.S. Environmental Protection Agency, July 1985.

(f) "Test Procedures for Analyses of Organic Pollutants,' Code of Federal Regulations. Appendix A, Part 136. July 1, 1985.

(g) "Measurement of Purgeable Organic Commounds in Drinking Water by Gas Chromatography/Mass Spectrometry. Method 524, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

0 (h) "Prescribed Procedures for Measurement of Radiosctivity in Drinking Water," Publication EPA-600/4-80 32, P.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory. Cincinneti, August 980.

(i) -Clean Harbors Radiological Environmental Analytical Procedures,- Clean Harbors Analytical Services, Braintree, MA, October 1985.

(j) -Methods for Chlorinated Phenoxy Acid Herbicides in Industrial Effluents,' MDQAIL, Cincinnati. November 23, 1973.

(k) -Annual Book of Standards,- Section 11: Water and Environmental Technology. Vols. 11.01-11.04, American Society for Testing and Materials, Philadelphia. 1983, 1984, 1985.

(1) "Methods for Benzidine, Chlorinated Organic Compounds, Pentachlorophenol and Pesticides in Water and Wastewater,- U.S. Environmental Protection Agency, September 1978.

(m) "Methods for Organochlorine Pesticides in Industrial Effluents," MDQARL, Environmental Protection Agency, Cincinnati, November 28, 1973.

(n) Methods for Determination of Inorganic Substances in Water and Fluvial Sediments." Techniques of Water- Resources Investigation of the U.S. Geological Survey, Book 5, Chapter A-1, U.S. Department of the Interior, 1979.

Spectrometry and Selected Ion (a) "Measureomet of Trihalomethanes in Drinking Water by Gas Chromatography/Mass I Monitoring,' Method 501.3, U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

(p) "The Analysis of Trihalomethanes in Finished Waters by the Purge and Trap Method," U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

(q) "The Analysis of Tribalomethanes in Drinking Water by Liquid/Liquid Extraction," U.S. Environmental Protection Agency, Environmental Monitoring and Support Laboratory, Cincinnati.

(r) 'Official Methods of Analysis," Association of Official Analytical Chemists, 14th ed., 1984-

(s) -Each Handbook of Water Analysis,- Each Chemical Company, Loveland, Co, 1979.

(t) H.M. Prichard and T.?. Gesell, "Rapid Measurement of Rn-222 Concentrations in Water with a Commercial Liquid Scintillation Counter," Health Physics, Vol. 33, 1977, pp. 577-581.

(u) 'Petroleum Products and Lubricants (I): D56-D1660," Annual book of ASTM Standards, Volume 5.01, American Society for Testing and Materials, Philadelphia, 1985.

(v) "Petroleum Products and Lubricants (III): D2981-Latest; Catalysts," Annual Book of ASTM Standards, Volme 5.03. American Society for Testing and Materials, Philadelphia, 1985. APPENDIX C

GEOPHYSICAL SURVEY DATA September 7, 1988

Mr. David Roberts General Electric Company 1000 Western Avenue Lynn, Massachusetts 01910 RE: Interim Geophysical Investigation Report Bennett Street Site WE Project No. 08257.05 Dear Mr. Roberts: The following interim Geophysical Investigation Report is being provided to General Electric to expedite continuing site activities at the Bennett Street site (Bennett Street - north perimeter parking lot) where Wehran has been conducting an environmental site assessment. Final data and interpretation will be included in the Environmental Site Assessment report to be submitted following completion of the second phase field investigation that is currently in progress. A summary of the geophysical testing procedures and results are provided and subsurface areas likely to contain buried ferro-magnetic material indicated. A ground-penetrating radar (GPR) survey was conducted on July 22, 1988 and magnetometer surveys were conducted July 28 and August 26, 1988 by Wehran Engineering at the Bennett Street site at the General Electric facility in Lynn, Massachusetts. The area of investigation covered the Bennett Street north parking lot and paved areas adjacent to the lot inside the Bennett Street gate. The purpose of the surveys was to determine the locations of abandoned underground storage tanks. The GPR survey consisted of moving a 500 mega-hertz GPR antenna over areas indicated to contain buried tanks, based on General Electric facility plans, and recording the reflected signals. The recorded GPR signals showed a few subsurface metallic articles and soil interfaces, but no indication of buried tanks was observed. For the July 28 magnetometer survey, 100-foot survey lines were located relative to landmarks identified on the facilities plan. Magnetometer readings were made at 10-foot intervals along the survey lines, at a total of 100 locations. After the survey was completed,the magnetometer readings were averaged and the data was normalized to an average value of 53,825 gammas. The departure from the normal value was then plotted for each station and contoured. From the contour map, two areas likely to contain buried ferro-magnetic materials were indicated northwest of the Bennett Street gate (Fig. 1). Because of the questionable location of the present fence lines on the facilities plan, a second magnetometer survey was conducted on August 26 which covered the southern end of the Bennett Street north parking lot. For this survey,a 140-foot by 200-foot grid was measured (and marked with paint) north of the Bennett Street gate. Magnetometer readings were made at each of 163 stations, which were located every 20 feet (north and south) and 10 feet (east and west). The readings were averaged and the data was normalized to an average value of cc a

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RAW DATA GENERAL ELECTRIC, BENNETT STREET SITE MAGNETOMETER READINGS AND NORMALIZED DATA FOR SURVEY OF JULY 28,1988 A B C D E F G H I J

52669 53289 53101 53490 54419 52322 53852 53568 53253 52496 -1156 -536 -724 -335 594 -1503 27 -257 -572 -1329 52761 52676 52809 52657 56575 No 52095 53201 52258 52272 -1064 -1149 -1016 -1168 2750 Reading -1730 -624 -1567 -1553 53754 53720 53273 55411 50463 52410 53659 54067 53345 50970 -71 -105 -552 1586 -3362 -1415 -166 242 -480 -2855

54235 53175 53912 54057 53498 52062 53557 54664 52262 51650

410 -650 87 232 -327 -1763 -268 -260 -1563 -2175

53191 53675 54625 54209 52992 51294 54596 53565 52969 53637

-634 -150 800 384 -833 -2531 771 839 -856 -188

52871 53925 54658 56866 52683 52756 53513 53580 52910 55679

-954 100 833 3041 -1142 -1069 -312 -245 -915 1854

53876 52363 51782 53452 52294 54891 53189 55289 53256 J'

51 -1462 -2043 -373 -1531 1066 -636 1464 -569

53220 55433 52628 53937 54597 53113 53312 54809 53057

-605 1608 -1197 112 772 -712 -513 984 -768

52884 55260 52717 54453 56155 54189 54228 53836 53959

-981 1435 -1108 628 2330 364 403 11 134

53267 55563 55969 54202 53941 53097 53543 53842 54072

-558 1738 2144 377 116 -728 -282 17 247

A' 52562 52784 53080 52906 53537 53258 53330 55679

-1263 -1041 -745 -919 -288 -5677 -495 1854

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54213

388

54156

331

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Data normalized to average value of 53825 y

Actual in y

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30 9/88 08257 05 GENERAL ELECTRIC, BENNETT STREET SITE MAGNETOMETER READINGS AND NORMALIZED DATA FOR SURVEY OF AUGUST 26, 1988 A B C D E F G H

52982 54697 53963 52427 52984 53492 52653 56212 -860 855 121 -1415 -858 -350 -1189 2370 54262 54087 54033 53211 52913 52104 52693 53316 420 245 191 -631 -929 -1738 -1149 -526 54165 55103 54317 53972 54289 54750 53363 53236 323 1261 475 130 447 908 -479 -606 53612 56140 54052 ,4516 53765 53678 53041 53990 -230 2298 210 674 77 -164 -801 148 53117 56394 54386 54855 54261 53180 55793 51275 -725 2552 544 1013 779 -662 1951 -2567 52946 52887 54818 53989 55632 53953 57515 53115 -896 -955 976 147 1790 111 3673 -727 53285 52630 56443 53393 52389 51468 54321 53485 -557 -1212 2601 -449 -1453 -2374 479 -357 53903 52358 53745 53059 56342 52713 53860 51965 61 -1484 -97 -783 2500 -1129 18 -1877 53928 55033 54404 53954 55149 53159 52928 53579 86 1191 562 112 1307 -683 -914 -263 54296 52441 54869 51983 56775 55563 53272 54746 454 -1401 1027 -1859 2933 1721 -570 904 53809 53996 53908 52665 54482 52567 52702 52869 -33 154 66 -1177 640 1425 -1140 -973 53984 53709 54067 52818 52389 54002 52559 53279 142 -133 225 -1024 -1453 160 -1283 -563 54403 53130 53640 55323 51831 52136 51485 51284 561 -712 -202 1481 -2011 -1706 -2357 -2558 55363 52986 53787 54657 53437 51525 52455 H' 1521 -856 -55 815 -405 -2317 -1387 55326 53030 53718 55683 54229 53233 52838 1484 -812 -124 1841 387 -609 -1004 54573 53791 53879 53901 54218 53629 53817 731 -51 37 59 376 -213 -25 54164 53634 55047 52935 54756 53568 55895 322 -208 1205 -907 914 -274 2053 53963 55217 55023 52396 54804 52875 55018 121 1375 1 1 8 1 -1446 962 -967 1176 54430 55294 54113 52693 54671 54573 53954 588 1452 271 -879 829 731 112 54419 53040 52987 53319 54904 55093 53887 577 -802 -855 -523 1062 1251 45 54763 53862 54357 55541 54165 53535 53352 921 20 515 1699 323 -307 -490 54302 54565 53347 53798 54142 54234 52720 460 723 -495 -4 300 392 -- 1122 A' ' C' D' 52463 53541 54403 -1379 -301 561 E' F' G'

All readings in gammas (y) Data normalized to average value of 53825 y

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30 9/88 08257 05 GROUND PENETRATING RADAR SURVEY RAW DATA !;LI

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44M APPENDIX D

CHEMICAL INFORMATION THE MERCK INDEX

AN ENCYCLOPEDIA OF CHEMICALS. DRUGS. AND BIOLOGICALS

TENTH EDITION

Martha Windholz. Editor Susan Budavari. Co-Editor Rosemary F. Blumetti. Associate Editor Elizabeth S. Otterbein. Assistant Editor

Published by MERCK & CO.. INC.

RAHWAY N J U S A

1983 3714. Ethvlbenzene. C,H,,. moI w, 106 16 C Q0.5%. H 9 50r C,H.C.H. Prepni from acetopnenone: Clemn - sen. Be, 46. 1838 (1913). Gattermann.Wieland. Proxtc ae arvahsenen Chemrxn ide Gruvier. Berlin. 40th ed.. 1961) p 332. By Huang-Minion modificaion of Wolff.Kishner reduction: A. I Vogel. Paerica Organie Chemry(Lots- -nans. 3rd ed.. 1959) p 516. Manuf: Faith. Keyes & Clarks 9890. Xylene. Dimethylbenzene xylol. CH,0 ; moi ws Inutriarl Chemical,. F A. Lowenhem. M. K. Moran. Eds. (Wilev-lntersence. New York. 4th ed.. 1975) pp 365-370. 106.16. C 90.50' H 9.50K C H,(CH,). First isolated Cclorless lioud. flammable. dq 0.866. bp 136.25'. fip 6 - 95.01" Gibbons s at, J. Am Chem. Soc 6L, 1130 (1946). from a crude wood distillate: Cahours. Compc. Rend 30. 319 11850) Obtained from coal tar: Fittig. Ann. 153. 265 nI 14932. Flash pt. closed cup. 64-F (1'C). Practically (1870) The xylene of commerce is a mixture of the three nsoi in water. masc wish the suaal organ solvents. LD. isomers o-. m- and p-xylene. the m-isomer predominating. oraly in rats: 5.46 g) kg. H. F. Smyth er Am. Jd. Hyf- at. Manuf from pseudocumene Seubold. U.S. pat. 2.960.545 A.sor- J. 23. 95 (3962)L (1960 to Umon Oil, by catalytic isomenzation of a hydro- Caution: Irritating to eyes, skin, mucous membraS. and. carbon fraction Berger. U.S. pat. 3.078.318 (1963 to Uni- n haigh concs. narcotic. versal Oil Prod.) Separation of isomers by clathratnon: tSE- For conversion to styrene monomer U ram soIvent. Schaeffer, U.S. pat. 3,029.300 (1962 to Union Oil). Toxicol- ogy E. Browning. Toxicity and Metabolism of Industrial Solvents (Eisevier. New York, 1965) pp 77.8 Review of mig processes: Faith. Keyes & Clark's Industrial Chemicals. F A Lowenhem, M. K. Moran. Eds. (Wiley-lnterscience. New York. 4th ed., 1975) pp 874-881. Mobile. flammable liquid d about 0.86: bp 137-140" Flash pt 29' Practically insol in water: misc with abs alco- hol. ether, and many other organic liquids m-Xviene. colorless iquid: d5 0.8684: mp -47.4' bp 139 3'; no 1 4973. Flash pt. closed cup: 77*F (25"C). Inso in water; misc with alcohol. ether. and many other organic solvents. LD, orally in rats: 7.71 mI/kg, H. F. Smyth er 9357. Toluene. Methvlbenzene; toluol; phenvlmethane. al. Am Ind. Hyg. Assoc. J. 23. 95 (1962) Methacide. CH.. mol wt 92.13. C 91.25%. H 8.75% Ob- o-Aylenc colorless liquid; d" 0.8801. mnp - 25' bp 144'; tamed mainly from tar oil Review of mig processes: Faith, no 1.5058. Flash pt. closed cup: 63'F (17'C). Insol in Keyes & Clark's Industrial Chemicals, F A. Lowenheim. water: misc with alc. ether. M. K. Moran. Eds. (Wilev-Interscience. New York. 4th ed. p-Aylene. colorless plates or prisms at low temp; di 1975) pp 822-830 0.86104; mp 13-14'; bp 137-138': no 1.49575. Thorne er al, Ind. Eng. Chem. Anal Ed 17. 481 (1945). Flash pt. closed cup: 77"F (25'C) Insol in water; sol in alcohol, ether. and many other organic solvents. Caution: May be narcotic in high concns Chronic toxici- ty not well defined, but is less toxic than benzene. USE. As solvent; raw material for production of benzoic acid. phthahc anhydride. isophthalic and terephithalic acids as well as their dimethyl esters used in the manufacture of Flammable. refractive liq: benzene-like odor. d" 0.866. polyester fibers manuf dyes and other organics: sterilizing Sohdif -95'. bp 110.6'; no 1.4967 Flash pt. closed cup: catgut. with Canada balsam as oil-immersion in microscopy; 40'F (4 4C). Very slightly sol in water; misc with alc. chlo- cleaning agent in microscope technique roform. ether. acetone. glacial acetic acid. carbon disulfide. LD, orally in rats. 7.53 g'kg. H. F. Smyth et at. Am. Ind. flyg. Assoc. J. 30. 470 (1969) Caution: May cause mild macrocytic anemia but not leukopenia Less toxic than benzene. Narcotic in high conens E. Browning. Toxity and Metabolism of Industrial Soents IElsevier. New York. 1965) pp 66-76

USE In manuf benzoic acid. benzaldehyde. explosives. dyes, and many other organic compds; as a solvent for paints. lacquers, gums. resins. in the extraction of various prmciples from plants; as gasoline additive. HANDBOOK OF TOXIC AND HAZARDOUS CHEMICALS AND CARCINOGENS Second Edition

by Marshall Sittig Princeton University

flp NOYES PUBLICATIONS IPark Rodge. INewJaery, U-S.A.

Coveqht 01985 bv MAnrsnal Siti9 Library of Congres Catatoeine m PubIcation Data No par 01 ths boo. may be eo oduced in any oIm Wio..t ermtisOn .n wetmn Irom. ire Publis.f, S.tti., Marshall. Library 0 CongreuCataoq Card Number. 8-22755 Handnoon o. toxic and haardI Cuhemii and ISBN 04155-1004 Prted in the Unried Statas

Published in the Urnitd States of America v hnciuOes index- Noves Puclicaiont 1. Poisons--Oectionaries. 2. Hazardous ssubsances %.i1 Road Park Ridge New Jersew 07656 Dieteonaries. 3. Carcinooens--Qictionaes. lii. RA1193SSB 1985 615 902 Sa-22755 to 9 7 6 5 4 3 ISBN 04155-10094 So o E

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EE* 2 m 5 ea go e1 EE

c m z m E APPENDIX E

PRELIMINARY ASSESSMENT FORM 87-2 Commonwealth of Masachusett Deparument of Environmentai Quality Engineerg

-- l Potential Oil/Hazardous Material Releams Site For DECE Use Only PRELIMINARY ASSESSMENT REPORT 4'""* File Name

______- atet Lsted I. PROPERTY NAME AND LOCATION (See Supotsmentary instructlons) Descl____

Progefty Name General Electric Bennett Street Lot UTM Coorainates' Adares Bennett Street, Lynn, Massachusetts 01910 N 470200 M E 338286 M Lautueet Longtis Munictoaty' ZoCode USGSQuaats) 4 2 27 .- N Lynn, Massachusetts 01910 Lynn, MAI8 70 0A2 w II. OWNERS/OPERATORS Pfesent owner s General Electric Company Dat* Specihe Property use/ Acvity a Adresz: 1000 Western Avenue Acquired Lynn, MA 01910 Contact David Roberts Tel. 617 - 5b4 - 3242 1953 SIC #A 4 2 Actve inactve

Presentgoerator General Electric Company Dae SoecanC Prooery usasACvIny Acress: 1000 Western Avenue Started

Coact David RobrtA 01910 Te'61 7 - 594 - 3242 1953 SIC O2L± 2 Acv C Inacove

Previous Owner From/To SoecIfte Progeny UseActvity Aaaress Dates

Tel. . -

Previous Operator From/ To Soecfic Property UsaiActnyty Address Dates

Tet. -sic

Additional Owner/Operator information is: JL- Attacfed(Sec. 3) . Unknown - Not Pertinent

Ili. GENERAL PROPERTY/AREA INFORMATION Figures 2-1 and 2-2 Site Locus Ma Attached I Prooerty/ Area Use * Property Present Propeny Past Surrounang Area Check if progeny is or ever was a known: Industrial X - RefuseWaste Discosi Area Commercial .. . - Gasoine (Servcal Staton Residensal X Fuel Storage Daeot Agrcultural - - Inusrer Manutacturng Facuty Undevelooed - - Check atProperty is Plannea for Oeveicoment IV. REVIEW OF AVAILABLE RECORDS/INFORMATION Municoal: Date Renewed 4/88IO/ 88 sy Stait Personnel t Wehran Engineeringt Inormason Sourcis Lynn Water & Sewer Commission, Tax Assessor, Health Dept., Fire Dept., City ConmaPernon(s Representatives of each Agency nistoric SocIety State: DatSReviewed 4/88 gy James Connolly O Wchran Engineering informaton SurcEs DEQE Sites and Spill Files, NE Region Comact Persons -) John Fitzgerald 617-935-2160 owner/ocerstor'' Date Re@naew4/88-10/ 8 8ay Staff Personnel O Wehran Engineering informaton Sources): Fpcility plans, field log notes, property acquisition records Conta Personisr David Roberts Teietina . 617-594-3242 omer" Date Reviewed 5/88 gy James Connolly Of Wehran Engineering Informaton SourcEs EPA Region I RCRA files ConactPeronsL EPA Representative Teleonane. Additional Information/Information Sources are attacflec 1 Yes C No.

OW4W/SAC Porm PA 57-2 Page 1 of iv. SURVEY OF AVAILABLE RECORDS/INFORMATION (Continueo.)

Based upon records and availacle information, nave otroleum producs or nazuhcous materals oeen usea. treamia. strsa. or dispos of. on me progerty? Yes C No X.- Petroleum - marcous Matenajs

unoergrouna Storage TanU 3 scoros/Eviaence of Pvesent/Former Use: Yes C No indicate Numoer at Tanks: Gasoline Fuel Oil Waas/Omner Oil Hazardous Materas Unknown Presenty On-sin -- Removed Wim Caoacity 11000Galons -13 Over 1o Years Old 7.-.-

TotI Number- 13 *See attached additional information Wastewatec * Generated? Comositon Disposal Present Yes E No Unknown CSanitry indusmal Munsciog Sewer Q On-em Oer Pasts Yet L. NO C Unknown C Sanitary C Industnal U Munitual Sewer U On-me Otner Commend: is mere currency an on-site water suoply wel? Yes No C Unknown. Acove? C Yes C No. Omer exisung means ror sampling grounowater? O Yes No indicate Presen or Past FederauiStato Environmental Permmai Reguiauons at me. Property. Z N.P.O.E.S. E Grounawater Oisctiarge 0 R.C.RA Generator C RC.R.A. TSO C Air Quality O Oier Street site. Commeon Permits have been issued to adjacent GE facility, but none involve the Bennett

Is are iere any record(s) of Criminal. Civl. or Admmmsratve Acnons. at me progerty due to (alleged) violations of .nvironmemli statut or regiu. lanon? M Yes E No Commers-

V. PROPERTY RECONNAISSANCE

Progery Reconnaaumnce by Owner/Ooeraot/Consusnt"- (Circle one.) Date Aoril 5. 1988 By James Connolly of Wehran Engineering Evidence of a Release of Oil or Hazardous Matenal? Yest No E Pate nal If Yes/Potenuai. Base uport C visual 0 olfactory C arayucailscreenmg Commena: During site recon no evidence of release was observed. However, during subsequent field activities conducted in May and July 1988, visual and analytical/screening evidence of petroleum layer present: benzene, toluene and ethylhenzene identified in petroleum layer, no concentrations above standards in groundwater. Soil contamination present including ethylhenzene, ,vlenes, toluene and up to A,900 ppm petroleum hydrocarhons.

FOR DECE USE ONLY:

- On-sine Reconnaissance - Off-st Reconnaiasance By EPA/DEOE/Contractor (Circleolo.) Date By of Evidence of a Release of Oil or Hazardous Materials? C Yes C No C Patenal Commens:

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Basa upon aii avauawte intormanon anci dat. oursuan to MGL Chapur 21E. s5mrew ev ce mat ameasa ot oi or nafarous matenais nae or is occurrng at tre progeny? M Yes C No M UnKnown at vms ame

Do property conditons constute a pned of rease? M Yae No C Polena&

if tter of above is -Yes". are immesate aite acnons necessary to atate an imminent hazar to public naaimn. saety. waters. or ne environment. due to: Proxiny to known Potble wear moks? C Yes No Potenta for direct huiman conect and exposure? Yes No Potnsal for fire or expliotOn? O Yes No Promumsty to fisneMnsenirc haieS? C Yea No Oher yes M No

ia rases. nas ceen confirmed. are immedias aCtOns necessaryto Inetsa amatsment conunment or recovery acfons, in oroerto avoid a situanon wnsre a asiay in remedial actons will suestanaly decease the eiciency ard/or aegree at ulmae cleanuC? Additional info. from Phase II site assessments needed to confirm this 0 er M No answer. Have remeias actons already oeen taxen at me ait? 0 Y"a No NOTE if immediate actons ase needed. or if remedial acnons have already been aen at sete. append complete sens on natire of probiem and oroposed/comoistled lss acon.

Cowner/toerator Pnvate Panry (Circle one.) Profanonat Environmentai Consurant Name i± ll - UnhPrtc, Name Douglas F. Seely Tl. Environmental Systems Engineer Tier Sr. Environmental Scieptist Company General Electric Co. Firm Wehran Enpineering Dat 12/1/88 Date 11/16/88 Property Affiliaton Owner/Operator M Ad Ioniormaon annea to Form

indicat Namesal ofEnronmenmf Assessment Repores)preparedtar Pro . Preliminary Assessment and Phase T Site Investigation Report for GE Bennett Street Site, ' vember 1988.

If Form completed by Prvete Party and/or Prolesseanal Environmennl Consultent, pnlese ag I hereby carty 1"t ne information furrighed in and wn "is Fort to m. bee at tru accurate. and complS. Signature: / / Signamre: k V (OflnriOWerflflPlvat Petty C. (corfnt) Vill. DISPOSTON OF CASE FOR DECE USE ONLY:

Form completed yr PRP /Conunsu itDECE/DEOE Connscr/Otner (CIre an.) Date Receied: If not comoiled by DEE. is provided intfomton: C Adequage 3 insu m C nacunram Concsjen.: C No viernce of easlse Fla e C rninned C Posasa e e - Furer linvesiaion Reougid

Disooaon of Cast C No Acion C Re-do PA C Perform S.L [ Perteno RM C Oner

Enforcement PosiUCor: C NA. Send NOR C N.A sem Om er comnient

DECE STAFF: TITL.

SIGNATURE DATE:

Page 4 of IV. Additional UST Information

Thirteen 10,000 gallon UST were installed in 1927 on the adjacent GE River Works North property. Due to fence line relocation in this area, it is difficult to identify exact locations of tanks. GPR surveys did not indicate the presence of 13 intact tanks which indicates that the remaining tanks are heavily corroded. GE facility records indicate that the tanks were decommssioned by filling with sand at an unknown date prior to 1953 when the main parcel of the Bennett Street Lot was purchased for use as a parking lot. Therefore, it is likely that only portions of corroded tanks exist at the site and the location of the remaining tanks is in question. The best estimate of tank use was for storage of #2 fuel oil, however, some tanks may have stored gasoline. The best estimate of tank locations are just outside of the site boundary line immediately northwest of the guard shack on Figure 2-2 Site Plan. z t - -a P "0..-

-9 .

-4. - - 4 - EmmaN ' - ETER4-4

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A./ L ENC

S'ad

SCALE 1:25 000 - .. E

SCALE. 1~ -2.083 TOPOGRAPHY TAKEN FROM SITELN MAP LYNN. MASS. 1970

7 5 MINUTE SERIES A QUARANGLE LOCATIONL

WEPROJECT NO. 08257.05 WEST NEP TUNE S7REET LEGEND

-- SITE BOUNDARY

LOT 31! RESIDENTIAL PROPERTY WITH LOT AND STREET NUMBER.

CATCH BASIN \~ \t ~ o0 MANHOLE

-- STORM DRAIN SYSTEM-Taken from G.E. Utility Drawing dated August 26. 1970

1AA \ 0 100 200

APPROXIMAME SCALE IN \ ' FEET

BASE FROM PRELIMINARY G.E. I-_ tAX PLAN DATED MAY 20, 1968. I Lu

I I'

LOT4B. I #28 I p.maaJ

A I

-- ~ ~ .e6 S

PROXIMATE LOCATIONI OF" V THIRTEEN TANKS GENERAL ELECTRIC \N-x\ - RIVER WORKS NORTH GUARD HOUSE |; (CITY LOT 58)

FIGURE 2-2

SITE PLAN ,"BLDG 67 BENNETT STREET SITE WE-CAIVGN \\ \ GENERAL ELECTRIC COMRA1NG adGNERS1111 LYNN, MASSACHUSETTS.

WE PROJECT NO. 08257.06 3.0 SITE HISTORY

A review of the history of the GE property now described as the Bennett Street site, former and current site usage and a summary of regulatory compliance activities at the site is provided in this section.

3.1 PROPERTY HISTORY The Bennett Street site is owned by the General Electric Company and is identified by the City of Lynn as part of City Lot 58 of Assessor's Maps 25 and 37. The GE River Works facility (North & South) is identified as City Lot 58 The approximate 3.5 acre site is zoned for heavy industrial use and currently is utilized as a perimeter parking lot for GE employees. The GE Bennett Street site (Figure 3-1) is comprised of 15 former individual parcels of land. Historical information obtained from City of Lynn files, GE files and the Lynn Historical Society were utilized to develop the following property history. The general area of the site and areas south of the site extending toward Lynn Harbor were formerly wetlands with tidal influences in the areas closer to the harbor. The wetlands in the site area existed until the early 1940's when filling was begun. Some fill material included foundry slag and waste sand containing some copper and brass scrap. Southern portions of the site were also reportedly filled with material containing clay. An auto repair shop reportedly occupied a parcel in the northwest corner of the site at 78 West Neptune in 1935 (northwest corner of area 15 on Figure 3-1). A 500 gallon UST is reported to have existed at this location under the cement floor. The current status of this tank is unknown, although no listing appears in City of Lynn or GE records.. Reportedly, a farm was located across Neptune Street from the site prior to residential development of this area. City of Lynn and GE records mention Bennett Street Park which apparently was part of City Lot 58 (see area 15 on Figure 3-1) prior to GE's purchase of this main parcel in 1953. No conclusive documentation of the nature or usage of the park was identified, although city records indicate the site was vacant prior to 1953 with the exception of the auto repair shop in the northwest corner of the site. Following the GE purchase of this parcel in

3-1 30 10/88.0825705 PARCELS INCLUDED IN BENNETT WEST NEPTUNE STREET STREET SITE: oS LOT 48. 25 RICHARD STREET 30 LOT 47 GENERAL LOT 46 ELECTRIC FORMERLY CALDWELL COURT

LOT 59 Co. o LOT UNKNOWN

LOT 34. 64 WEST NEPTUNE STREET

© LOT 34, 58 WEST NEPTUNE STREET NORTON ST \ LOT 35, 41 ELMWOOD AVENUE

LOT 35. 47 ELMWOOD AVENUE

LOT 86. 75 ELMWOOD AVENUE

LOT 87. 79 ELMWOOD AVENUE -A C LOT 88. 83 ELMWOOD AVENUE C S (4 LOT 9Q 163 BENNETT STREET I ---- A CITY LOT 58

I- Lu 'ci' 0 100 200 Lu V-- A 0~ AlPflfM SCALLK FEET 0 K IcY '0 L U r

N

U 14 -A r

F:4) TSWSEET GENERAL ELECTRIC BASE FROM PREULMINARY GE. GUARD HOUSE PLAN DATED MAY 20t196Q.

FIGURE 3-1 LG 67 FORMER SITE SUBDIVISIONS

BENNETT STREET SITE GENERAL ELECTRIC CCNSAING INIS LYNN. MASSACHUSETTS

WE PROJECT NO. 08257.05 1953, the area was paved and the indicated storm water drainage system installed. From the early 1950's to the early 1970's GE used portions of the property for automobile parking. During the early 1970's, GE needed additional employee parking space and acquired a number of residential properties adjacent to the original parcel of land, along Elmwood Avenue, West Neptune Street and Richard Street. These properties are shown in Figure 3-1. Information was lacking with regard to the property history for some of the parcels of land acquired by GE which lie along Richard Street. However, based on historical information provided by the City of Lynn for this area, the properties along Richard Street were zoned residential. The fifteen individual parcels include: Lot 48, 25 Richard Street; Lots 46 and 47; the lot formerly known as Caldwell Court; Lot 59; Lots 34, 64, and 58 West Neptune Street; Lot 35, 41 and 47 Elmwood Avenue; Lot 87, 79 Elmwood Avenue; Lots 88 and 85 Elmwood Avenue; and Lot 90, 163 Bennett Street. Review of available ownership records at the Essex County Registry of Deeds located in Salem, Massachusetts and review of available information provided by GE indicates that the usage of these properties had been for residential housing. The records also indicate that in the early 1970's GE demolished a number of residential homes on these properties and paved the vacant areas with asphaltto provide the desired additional parking space. The most significant finding is related to two underground storage tank (UST) areas in the GE River Works North property adjacent to the Bennett Street site to the west and southwest (see Figure 2-2). This larger General Electric Works North property was purchased by GE in the early 1900s. GE facility plans dated June 13, 1988 indicate one area containing thirteen 10,000 gallon out-of-service tanks each approximately 37 feet long by 7 feet wide in an area along the Bennett Street site property line extending northwest from the guard shack at the GE Bennett Street gate (see Figure 4-1). The tanks were reportedly installed in 1927. Due to relocation of the fenceline in this area, there is some confusion as to the exact locations of these tanks, however they appear to have been just outside the site boundary in this area. The tanks were reportedly used to store #2 and #4 fuel oil for plant boilers, and possibly gasoline.Fuel oil piping ranging in size from - inch

3-2 30 10/88 08257.05 to 10 inches in diameter, connected these tanks to various utility locations in the plant. The second area includes two additional 10,000 gallon tanks located outside of the Bennett Street site boundary, south of the guard shack. These tanks are also indicated to have stored #2 fuel oil and been connected into this fuel oil distribution network. Records reviewed are not detailed enough to discriminate between above ground ad below ground tanks at these locations. It is possible that some of the referenced tanks were installed above ground. The 13 tanks were reportedly taken out of service sometime prior to 1953. No records were found indicating when the other 2 tanks were taken out-of-service. GE facility records indicate that for some tanks, tops were cut off and the tanks filled with sand prior to the conversion of the site to plant parking in the early 1950's. A neighboring property owner has indicated that some tanks may have actually been removed, however there is no documentation to confirm this event. The date that these tanks were filled or removed is unknown. A general summary of the site ownership and history is provided in Table 3-1.

3-3 30 10/88.082s70s Table 3-1 GENERAL ELECTRIC COMPANY, LYNN PROPERTY HISTORY SUMMARY - BENNETT STREET

Dates Site Usage Owner

1880 Vacant with wetlands E.B. Johnson 1897 Vacant with wetlands Chase A. Moore, National City Bank early Vacant with wetlands Boston and Maine Railroad, 1900's early GE River Works North facility area General Electric 1900's adjacent to Bennett Street site was purchased, thirteen USTs installed in 1927 1935 Small parcel in northwest corner, at Unknown 78 W. Neptune occupied by auto repair shop w/ 500 gal. UST 1953 Vacant and/or Park area (area 15, General Electric Fig.3-1) purchased by GE for plant parking area 1970 Many small residential lots (parcels General Electric 1-14) added to plant parking area

30.10/88 08257 05