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Statement of Work for Soil Boring and Well Installation at the Rockaway Borough Well Field Site Morris County, New Jersey

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Statement of Work for Soil Boring and Well Installation at the Rockaway Borough Well Field Site Morris County, New Jersey SDMS Document 68234 EPA CONTRACT NUMBER: 68-01-7250 EPA WORK ASSIGNMENT NUMBER: 251-2L81 EBASCO SERVICES INCORPORATED STATEMENT OF WORK FOR SOIL BORING AND WELL INSTALLATION AT THE ROCKAWAY BOROUGH WELL FIELD SITE MORRIS COUNTY, NEW JERSEY OCTOBER, 1989 Prepared by: Approved by: CMvOAji' Lu.^:, Edward W. Blanar Dev R. Sachdev, Ph.D. P.E. Site Manager Regional Manager Region II w S o o NJ O o VD -CO-^ , TABLE OF CONTENTS Page GENERAL DESCRIPTION 1 A. PROJECT DESCRIPTION 1 B. SITE GEOLOGY 1 C. HYDROGEOLOGY 4 D. SCOPE OF WORK 5 E. HEALTH AND SAFETY 11 II, SPECIAL CONDITIONS 12- A. SOLICITATION REQUIREMENTS 12 B. WORK PROVIDED BY SUBCONTRACTOR 14 C. WORK PROVIDED BY EBASCO 16 D. HEALTH AND SAFETY 17 E. PROJECT SCHEDULE 17 F. MEASUREMENT AND PAYMENT 18 G. SUBMITTALS AND DELIVERABLES 21 H. PRICE SUMMARY FORM 22 III. TECHNICAL SPECIFICATION 25 A. CODES AND STANDARDS 25 B. MONITORING WELLS, AND SOIL BORING 25 C. DECONTAMINATION 30 D. RECORDS 31 FIGURES 1 Site Location Map 2 2 Rockaway Borough Site Map 3 3 Proposed Well Locations 6 4 Proposed Soil Boring Locations 10 5 Typical Groundwater Monitoring Well 28 TABLES Summary of Monitoring Well Depths and Screen Lengths ATTACHMENTS 1. Site-Specific Health and Safety Plan (HASP) 2. Site-Specific Health and Safety Plan for REM III Pre-Bid Site Visits 3. Medical Surveillance Program 4. Quality Assurance Nonconformance Report s? 5. Direction to Site 4 6. Standard Specifications for Sealing o Abandoned Wells o NJ O o I. GENERAL DESCRIPTION A. PROJECT DESCRIPTION The Borough of Rockaway (Rockaway Borough) is located in central Morris County, New Jersey (Figure 1). Since 1922, Rockaway Borough has operated 11 public water supply wells for the municipality. Eight of these wells have since been abandoned. The remaining three wells (No. 1, No. 5, and No. 6) supply potable water to Rockaway Borough and portions of Denville and Rockaway Townships. The wells can produce up to l.l million gallons of water per day. The three wells comprise the Rockaway Borough Well Field, and draw water from the glacial (overburden) aquifer. This aquifer is the sole source of drinking water for the communities it supplies. Ebasco Services Incorporated, under contract to the U.S. Environmental Protection Agency (USEPA), is undertaking a study to delineate the horizontal and vertical extent of groundwater— contamination, and to identify sources of the contamination. To obtain this inforTnation, thirteen (13) monitoring wells will be- installed and four (4) additional soil borings will be drilled by the successful offeror in accordance with this statement of work. A map of the study area is shown in Figure 2. On site activities shall commence two weeks after subcontract _ award and be completed within 14 weeks after subcontract award. The successful offeror will be responsible for well installation permits. The REM III lead for Ebasco on this work assignment will be in charge of supervising the successful offeror (Subcontractor) during performance of this statement of work. B. SITE GEOLOGY Rockaway Borough is located within the New Jersey Highlands Physiographic Province. This area is characterized by northeast trending ridges that are separated by broad valleys that lie 200- 300 feet below the ridge crests (Sims, 1953). Ridge orientations reflects the erosion and lithology of bedrock. The topography also exhibits the effects of Pleistocene glaciation. Bedrock within the area consists of Pre-Cambrian metasedimentary and igneous rocks (Sims, 1953). Overlying bedrock are surfical deposits of predominantly glacial origin. These deposits-vary from glacial-fluvial clays and silts to coarse cobble and boulder deposits left as part of a terminal- moraine of the Wisconson Stage. This moraine generally parallels the Rockaway River. The thickness of these deposits varies — depending on the proximity to the terminal moraine. Near the site, glacial deposits vary in thickness from nonexistent in ^ outcrop areas to over 200 feet thick in valley floors. Within a ^ mile of the site, the Mount Hope Fault Trace is the largest fault o o NJ o o FIGURE 1 ROCKAWAY BOROUGH WELLFIELD SITE LOCATION MAP Rockaway Borough, Morris County, New Jersey •XI o o NJ O M O RWY 002 0102 MAP OF ROCKAWAY BOROUGH 80B0UGH OF ROCKAWAY FQP present. Fault sets in the area are dominated by two trends: a northeast trending set and a northwest trending set. The geology of Rockaway Borough is similar to the regional geologic setting. Bedrock is overlain by glacial deposits in most of the study area. The thickness of these deposits vary and are typically thickest in the valleys. Geologic investigations performed in Rockaway Borough determined that glacial-fluvial deposits occur up to 200 feet thick in the valley. These deposits vary from fine grained silts and clays to boulders that are up to eight feet in diameter. In general, coarser deposits were deposited immediately above bedrock. Clays, silts and sand overlie the gravel and coarser deposits. Within the valley glacial fluvial deposits can be divided into six major stratigraphic units. These units consist of: l) undifferentiated till, 2) inorganic silt lenses, 3) well sorted sand and gravel unit containing gravel rich horizons, 4) a thinly laminated clay, silt and fine grained sand unit, 5) a boulder and cobble unit with abundant sand and gravel, and 6) gneissic and/or dioritic bedrock. Shallower investigations performed by SAIC (1985) encountered similar stratigraphic units, not including bedrock. Actual total thickness of unconsolidated deposits in Rockaway Borough is unknown. C. HYDROGEOLOGY Groundwater is contained within both Pre-Cambrian rock and Quaternary unconsolidated formations in Rockaway Borough. The respective aquifers are utilized for private, commercial, and industrial purposes. Wells tapping the aquifer in the unconsolidated zone show yields between 0.14 and 1.25 gallons per minute (SAIC, 198 6). Groundwater located in the stratified drift deposits (bedded sand and gravel) comprises the largest and most productive aquifer in Rockaway Borough. The stratified drift aquifer is unconfined and under water-table conditions where till materials do not overlie the drift. In areas where the stratified drift is overlain by glacial till, it is reported (by SAIC) that the aquifer may be under confined or semi-confined conditions. Slug tests performed on -SAIC monitor wells recorded hydraulic conductivities ranging from 0.006 to 0.90 ft./day. Aquifer- pumping tests performed by Legette, Brashears, and Graham in 1974 recorded an average hydraulic conductivity of 23.20 ft./day. to Such discrepancy between SAIC and the 1974 hydraulic conductivity ^ values indicate that the SAIC wells likely screen strata within glacial till and/or low-permeable zones (clay and silt interbeds) o in stratified drift. 5 o The approximate depth to water in the unconsolidated formation aquifer(s) is between 6 and 50 feet below ground surface. Pumping influences and a monitor well's distance from a pumping well dictate water levels at specific locations. The hydraulic gradient in the unconsolidated foirmation aquifer is multidirectional (due to production wells), and ranges from 0.021 to 0.071 ft./ft. Naturally-occurring hydraulic gradients are expected to follow topographic gradients. D. SCOPE OF WORK This Scope of Work defines the requirements for drilling at the Rockaway Borough Well Field site. The work that will be provided under this subcontract is summarized as follows: o Clear access routes and prepare drilling sites as necessary. o Decontaminate the drilling rigs and down-hole sampling equipment, upon arrival, prior to moving to the next drilling site, and at completion. Well screens and casing must be steam cleaned prior to installation. o Remove and seal existing monitor wells indicated by the Ebasco field representative. It is estimated two existing wells will be sealed. Sealing will be performed to New Jersey Department of Environmental Protection specifications (Attachment 6) by a New Jersey State Certified Well Sealer. o Install an estimated 13 monitor wells at the approximate locations shown in Figure 3. Monitoring wells will be installed utilizing the mud rotary drilling and hollow stem auger techniques. Monitoring wells (Table 1) will be constructed of 4 inch (I.D.), threaded, flush-joint, Schedule five (5), type 304 stainless steel casing with stainless steel well screens (slot size 0.010 inches - 10 slot), and a stainless steel bottom plug. Shallow and intermediate monitor wells will have twenty (20) foot screens meeting said specifications. Deep monitor wells will have ten (10) foot screens. All monitor wells will have a stainless steel well cap and an eight (8) inch I.D. diameter, five (5) foot steel protective casing with a locking cap. Stick up and/or flush mount wells will be installed as specified by the Ebasco field representative. n o o NJ O ifc. ^^ 002 0105 LEGEND: RBW-4, 4A PROPOSED CLUSTER WELL ^ LOCATIONS (TWO (2) WELLS 1 R9W-3 PROPOSED MONITORING WELL " LOCATIONS 1000 SCALE IN FEET Figure 3 PROPOSED GROUNDWATER MONITORING WELL LOCATIONS aOHOUGH OF ROCKAWAY FOP TABLE 1 ROCKAWAY BOROUGH WELL (RBW) MONITORING WELL LOCATIONS WELL DEPTH WELL SCREEN NUMBER (FT) LOCATION LENGTH (FT) RATIONALE RBW 1 (S) 40 Parking Lot on 20 Lusardi Cleaners lA (I) 80 Lusardi Cleaners. 20 property, potential source area. RBW 2 (I) 80 Corner of Maple and 20 Well located between Halsey Avenue Lusardi Cleaners and Borough Well Field. RBW 3 (I) 80 Roned Realty property 20 Cluster with existing well DGC-5, potential source area. RBW 4 (I) 80 Halsey Avenue and Cobb 20 Cluster with SAIC-6. 4A (D) 200 Street 10 Well cluster upgradient of potential source areas and between old landfill area. RBW 5 (I) 80 Private residence on Gill 20 Replaces private well Avenue, which border GW-2. Downgradient Rockaway River. of Dye Pit Area.
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