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PROFESSIONAL SERVICES DESCRIPTION FOR THE POSITION OF:

Paulsboro Marine Terminal Phase I Underwater Archeological Survey

SUBMISSION DEADLINE:

July 9, 2010 at 1:00 P.M.

FAIR AND OPEN PUBLIC SOLICITATION PROCESS FOR PROFESSIONAL SERVICES

FOR

GLOUCESTER COUNTY IMPROVEMENT AUTHORITY 109 BUDD BOULEVARD WOODBURY, 08096

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Technical Report, Obstruction Survey for Future Activites at the of Paulsboro Gloucester County, New Jersey

SPONSOR

Gloucester County Improvement Authority 254 County House Road Clarksboro, NJ 08020

DRAFT

SURVEY COMPANY

Aqua Survey Inc. 469 Point Breeze Rd. Flemington, NJ 08822

ASI Project Number 29-132

October 15, 2009

Technical Report, Obstruction Survey for Future Activites at the Gloucester County, New Jersey

SPONSOR

Gloucester County Improvement Authority 254 County House Road Clarksboro, NJ 08020

ASI Project Number 29-132

DRAFT

This report, as well as all records and raw data were audited and found to be an accurate reflection of the study. Copies of raw data will be maintained by Aqua Survey, Inc., 469 Point Breeze Road, Flemington, NJ 08822.

Kenneth Hayes Date President

Mark Padover Date Lead Field Scientist

Table of Contents

I. EXECUTIVE SUMMARY ...... 1

II. MATERIALS, METHODS, AND RESULTS ...... 4

A. Project Area ...... 4 B. Horizontal Positioning ...... 4 C. Magnetometer Data Collection and Results in Northern Area ...... 6 D. Side Scan Sonar Survey Data Collection and Results ...... 9 E. Sub-Bottom Profiler Survey ...... 13

III. PROJECT CONCLUSIONS ...... 15

Appendices

Appendix A. Equipment Data Sheets

List of Figures

Figure 1 Map showing area surveyed in blue (NOAA chart 12312)...... 5

Figure 2 Magnetometer targets in and the Cove ...... 8

Figure 3 Overall magnetometer map and target Mag 6 ...... 8

Figure 4 Side scan mosaic of the mouth of Mantua Creek...... 10

Figure 5 Side scan mosaic close-up showing large logs/trees...... 11

Figure 6 Side scan mosaic close-up showing debris off of pier...... 12

Figure 7 Sample of sub-bottom image showing subsurface reflectors...... 14

List of Tables

Table 1 Table of Magnetic Anomalies ……………………….………………………… 6

I. EXECUTIVE SUMMARY

A geophysical remote sensing obstruction and debris survey was conducted covering the area where future activities are to be conducted in the mouth of Mantua Creek and along the eastern shoreline of the for the Port of Paulsboro in Gloucester County, New Jersey. The area within Mantua Creek that was surveyed extended from shoreline to shoreline and 825 feet upstream from the end of the southern jetty protecting its entrance into the Delaware River. The area of the Delaware River that was surveyed included an area extending approximately 3,150 feet downstream from the end of the north jetty of Mantua Creek and extending from nearly the shoreline to a distance of approximately 625 feet into the river from the existing pier structures. The areas surveyed encompassed the entire area where future activities may occur. The primary goal of the geophysical survey was to detect the presence of exposed and buried debris and submerged utilities and to identify any anomalies as accurately as possible that could be impacted by future activities.

The geophysical survey conducted on October 26, 2009. Technologies and techniques employed included side scan sonar, magnetometer, sub-bottom profiler, and differential global positioning (DGPS). Survey lines spaced 50 feet apart were run parallel to the shoreline using the side scan sonar, magnetometer, and sub-bottom profiler. The survey methodology was designed to provide data indicating the position and relative size of exposed targets in the survey area, as well as archaeological data essential for complying with the National Historic Preservation Act of 1966, as amended, through 1992 (36 CFR 800, Protection of Historic Properties) and the Abandoned Shipwreck Act of 1987 (Abandoned Shipwreck Act Guidelines, National Park Service, Federal Register, Vol. 55, No. 3, December 4, 1990, pages 50116-50145).

All operations were conducted using DGPS with a horizontal accuracy of less than 3 feet. During the survey, the horizontal dilution of precision (HDOP) of the DGPS data was monitored. If the HDOP exceeded 2.0, survey activities were suspended or data was not used. The DGPS antenna was mounted directly over side scan sonar and sub-bottom profiler to eliminate offset errors and ensure positions tied directly with the collected data. The magnetometer was towed at a measured fixed distance behind the vessel. Hypack 2009 was used for magnetometer data collection and very accurately models the towfish position based on tow cable length, a catenary factor, and vessel DGPS data.

The magnetic survey was conducted using a Geometrics G-882 marine cesium magnetometer system. The primary objective was to detect exposed and buried debris within the survey area. During the survey, the sensor was towed behind the vessel from the nose tow point to get the sensor as close to the bottom as was safe in the shallow water. The survey area included existing pier steel structures as

1 well as shoreline debris. These features can obscure the magnetic signature of smaller debris if the small debris is in close proximity to the larger structures. The large steel pier in the Delaware River was detectable by the magnetometer from more than 400 feet away and could easily have masked smaller debris located within a 250 foot radius.

Six localized targets were detected during the survey. Targets Mag 1 through Mag 5 are located in or near the cove area in the Delaware River just east of the mouth of Mantua Creek. Target Mag 6 is located in deeper water in the Delaware River near the northwestern end of the survey area. A known sewer outfall was detected. The depth of burial of the outfall is not known. Target Mag 1 is a large anomaly located just to the east of the end on the sewer outfall. Targets Mag 2 and Mag 3 are located approximately 60 to 80 feet east of the sewer outfall. Target Mag 4 is located approximately 140 feet west of the sewer outfall. The short duration of these three anomalies indicates they are likely to be located near the sediment surface. Target Mag 5 is a complex collection of magnetic anomalies which was detected on five survey lines. The nature of the material generating the anomalies which make up Mag 5 and Mag 6 could not be determined from the surveys conducted. None of the magnetic anomalies were associated with targets in the side scan sonar records, indicating that all of the material generating the anomalies lies buried below the river sediment.

An Edgetech 4100-FS dual frequency 100kHz/500kHz side scan sonar system was used for this survey. Range scale was set to 50 meters, which resulted in greater than 300 percent insonification of the river bed. Following the survey, the individual records were analyzed to detect any large objects or man-made targets that might be present. The sonar records were mosaiced using Chesapeake Technologies Sonar Wiz Map 4.0 software to provide a better overall view of the survey area and to produce a single geo-referenced image of the survey area.

When analyzing the side scan mosaic, areas of submerged vegetation can be seen in the shallow waters along the southern shoreline within Mantua Creek and in the shallow water of the Delaware River. The remains of what appears to be a small dock measuring approximately 100 feet by 25 feet can be seen along the southern shoreline of Mantua Creek approximately 530 feet upstream of the end of the southern jetty. Small scattered objects can be seen within the of Mantua Creek. What appears to be two large logs/trees can be seen in the Delaware River, one in shallow water and one in deeper water off of the eastern end of the existing pier structures. Other scattered debris can be seen in the Delaware River within approximately 40 feet of the existing pier structures. None of the side scan sonar targets have signatures which appear to be indicative of submerged cultural resources.

An ODEC Stratabox sonar system was used to collect the sub-bottom profiling data during the survey. The principal objective of the survey was to collect sub- bottom images to detect the presence of utility crossings of the river that may be

2 impacted by future vibracoring operations. During the survey, the transducer was hard-mounted to the side of the survey vessel with the navigational antenna mounted directly over the transducer, eliminating offset errors. The sensor was deployed at a depth of 3 feet to minimize interference from the vessel. The navigational data was logged at one-second intervals by the ODEC Stratabox digital recording system

Sub-bottom survey results found that the penetration into the sediment was limited in most of the survey area. The seismic data for Mantua Creek and the shallow water area (less than 10 feet) of the Delaware River is strongly indicative of gas in the sediments at the immediate water/sediment interface. This conclusion was supported by the number of strong multiples being seen in the seismic section.

Penetration over the entire survey area was typically less than 5 feet. The sub- bottom profiling was unsuccessful in terms of its ability to detect buried debris or to generate continuous geologic cross-sections of the sub-bottom sediments or bedrock. The principal limiting factors to the quality of the sub-bottom data were the presence of organic, gaseous, materials in the shallow sub-bottom, the relatively shallow water depths, and the similar nature of the sub-bottom sediments in the survey area. Depth of penetration of the sub-bottom acoustic signal was limited primarily by the presence of organic-rich silts in the shallow water. Decomposition of the aquatic vegetation and other organic material in these sediments produces gas. Since gases are characterized by very high acoustic impedance (the product of a material’s density and sound velocity) contrasts with surrounding materials, when trapped, they limit the passage of sound waves deeper into the sub-surface. The shallow waters exacerbated the problem of multiples in the sonar data. Multiples are generated by sound energy reverberating in the water column as opposed to penetrating into the sub-bottom. In the sub-bottom profiles, the presence of multiples, which essentially parallel the river and creek bottom, mask the presence of possible deeper reflection events.

In the deeper water of the Delaware River, multiples were less of a problem, with isolated reflectors detected at a maximum depth of 15 feet below the sediment surface. No indication of buried utilities or previous trenches could be seen in the sub-bottom records.

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II. MATERIALS, METHODS, AND RESULTS

A. Project Area

A geophysical remote sensing obstruction and debris survey was conducted covering the area where future activities are to be conducted in the mouth of Mantua Creek and along the eastern shoreline of the Delaware River for the Port of Paulsboro in Gloucester County, New Jersey. The area within Mantua Creek that was surveyed extended from shoreline to shoreline and 825 feet upstream of the end of the southern jetty protecting its entrance into the Delaware River. The area of the Delaware River that was surveyed included an area extending approximately 3,150 feet downstream from the end of the north jetty of Mantua Creek and extending from nearly the shoreline to a distance of approximately 625 feet into the river from the existing pier structures. The areas surveyed encompassed the entire area where future dredging activities may occur (Figure 1). The primary goal of the geophysical survey was to detect the presence of exposed and buried debris and submerged utilities and to identify any anomalies as accurately as possible that could be impacted by future activities.

B. Horizontal Positioning

All aspects of the remote sensing survey were conducted using differential global positioning system (DGPS). This allows the positioning accuracy for the survey vessel to be on the order of less than 3 feet. A Trimble SPS351 DGPS system was set-up on the survey vessel and supplied positioning data to all the survey instruments during the geophysical remote sensing surveys.

During the survey, the HDOP as well as the status of the DGPS was monitored. If the HDOP exceeded 2.0, survey activities were suspended or data was not used. Results of the survey were produced in New Jersey State Plane North American Datum of 1983.

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Figure 1 Map showing area surveyed in blue (NOAA chart 12312).

5

C. Magnetometer Data Collection and Results in Northern Area

A magnetometer survey was conducted in the project area in order to detect the presence of submerged utility crossings and ferrous debris that could pose a hazard to future operations. The magnetometer survey complemented and aided in the interpretation of the side scan sonar survey results regarding debris and potentially significant historic submerged cultural resources. The survey methodology was designed to provide data indicating the position and relative size of exposed targets in the survey area, as well as archaeological data essential for complying with the National Historic Preservation Act of 1966, as amended, through 1992 (36 CFR 800, Protection of Historic Properties) and the Abandoned Shipwreck Act of 1987 (Abandoned Shipwreck Act Guidelines, National Park Service, Federal Register, Vol. 55, No. 3, December 4, 1990, pages 50116- 50145).

A Geometrics G-882 marine cesium magnetometer system capable of plus or minus 0.01 gamma resolution was used to conduct the survey. Survey lines were run at approximately 50 foot intervals to ensure complete coverage of the survey area. Data was recorded at 0.1 second intervals and electronically paired with positioning data from the DGPS using an onboard computer running Hypack 2009 survey software. The magnetometer was towed at a measured fixed distance behind the vessel. Hypack 2009 very accurately models the towfish position based on tow cable length, a catenary factor, and vessel DGPS data. During the survey, the sensor was towed behind the vessel from the nose tow point to get the sensor as close to the bottom as was safe in the shallow waters of the survey area.

A magnetic target or anomaly is any object creating a measurable and significant disturbance in the background magnetic field. To ensure reliable target identification and assessment, analysis of the magnetic data was initially carried out as it was generated. Post-processing of the data involved examining each survey line individually and annotating anomalies detected. Analysis of each target signature also included consideration of magnetic characteristics previously demonstrated to be reliable indicators of historically significant submerged cultural resources.

The detectable magnetic signature created by an object varies greatly depending on many factors. The two dominant factors are the mass of the object and the distance of the sensor from the object creating the disturbance. Other factors include the orientation of the object, direction the sensor is passed over or near the object, and background magnetic fields.

The survey area included existing pier steel structures as well as shoreline debris. These features can obscure the magnetic signature of smaller debris if the small debris is in close proximity to the larger structures. The large steel pier in the

6 Delaware River was detectable by the magnetometer from more than 400 feet away and could easily have masked smaller debris located within a 250 foot radius.

Six localized targets were detected during the survey (Table 1). Targets Mag 1 through Mag 5 are located in or near the cove area in the Delaware River just east of the mouth of Mantua Creek (Figure 2). Target Mag 6 is located in deeper water in the Delaware River near the northwestern end of the survey area (Figure 3). A known sewer outfall was detected and can be seen as the linear feature in Figure 2. The depth of burial of the outfall is not known. Target Mag 1 is a large anomaly located just to the east of the end on the sewer outfall. Targets Mag 2 and Mag 3 are located approximately 60 to 80 feet east of the sewer outfall. Target Mag 4 is located approximately 140 feet west of the sewer outfall. The short duration of these three anomalies indicates they are likely to be located near the sediment surface. Target Mag 5 is a complex collection of magnetic anomalies which was detected on five survey lines. The nature of the material generating the anomalies which make up Mag 5 and Mag 6 could not be determined from the surveys conducted. None of the magnetic anomalies were associated with targets in the side scan sonar records, indicating that all of the material generating the anomalies lies buried below the river sediment.

Table 1 Table of Magnetic Anomalies

Name Easting Northing Type Duration Intensity Notes (NJ 83 ft) (NJ 83 ft) (seconds) (gammas) Mag 1 286727.5 372405.0 Dipolar 7 2619 Mag 2 286719.5 372196.7 Negative 2 155 shallow Mag 3 286728.2 372115.0 Dipolar 4 207 Mag 4 286494.5 372116.5 Negative 2 1289 shallow Mag 5 286435.0 372240.5 Multi- 13 2935 Cluster of component targets Mag 6 284338.7 372285.2 Multi- 16 32 component

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Figure 2 Magnetometer targets in Mantua Creek and the Cove

Figure 3 Overall magnetometer map and target Mag 6

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D. Side Scan Sonar Survey Data Collection and Results

The side scan sonar survey encompassed the entire river bottom within the survey area. This survey was conducted using an Edgetech 4100-FS dual frequency 100kHz/500kHz sonar system. The DGPS was used for positioning and Hypack 2009 survey management software was used for survey control and ship track recording. This survey was conducted by lines parallel with the shoreline spaced approximately 50 feet apart, with one line as close to the shoreline as possible. Range was set to 50 meters per side, resulting in greater than 300% coverage.

The side scan survey was designed to optimize resolution of the side scan sonar records. Prior to commencing survey operations, the sonar was tuned and adjusted to find the optimal combination of control settings that yielded the best image. Gain settings were adjusted as little as possible, to allow accurate post- processing. Data was logged to the onboard computer for later review.

Side scan sonar records were analyzed for evidence of objects exposed above the sediment of the river. Detected features were plotted at their locations on the geo- referenced drawing. The sonar records were mosaiced using Chesapeake Technologies Sonar Wiz Map 4.0 into a single geo-referenced image (Figure 3). This image was combined with the magnetometer data in Hypack 2009 to allow better interpretation of both data sets.

When analyzing the side scan mosaic, areas of submerged vegetation can be seen in the shallow waters along the southern shoreline within Mantua Creek and in the shallow water of the Delaware River. The remains of what appears to be a small dock measuring approximately 100 feet by 25 feet can be seen along the southern shoreline of Mantua Creek approximately 530 feet upstream of the end of the southern jetty. Small scattered objects can be seen within the channel of Mantua Creek. What appears to be two large logs/trees can be seen in the Delaware River, one in shallow water and one in deeper water off of the eastern end of the existing pier structures. Other scattered debris can be seen in the Delaware River within approximately 40 feet of the existing pier structures. None of the side scan sonar targets have signatures which appear to be indicative of submerged cultural resources.

9

Figure 4 Side scan mosaic of the mouth of Mantua Creek.

10

Figure 5 Side scan mosaic close-up showing large logs/trees.

11

Figure 6 Side scan mosaic close-up showing debris off of pier.

12 E. Sub-Bottom Profiler Survey

An ODEC Stratabox sonar system was used to collect the sub-bottom profiling data during the survey. The principal objective of the survey was to collect sub- bottom images to detect the presence of utility crossings of the river that may be impacted by future operations.

During the survey, the transducer was hard-mounted to the side of the survey vessel with the navigational antenna mounted directly over the transducer, eliminating offset errors. The sensor was deployed at a depth of 3 feet to minimize interference from the vessel. The navigational data was logged at one- second intervals by the ODEC Stratabox digital recording system

During the sub-bottom survey, the data was observed in “real-time” on the Stratabox monitor. The data displayed included the reflection coefficient of the sediment surface (a measure of the acoustic impedance contrast at the water/sediment interface), the relative amplitude of bottom and sub-bottom reflections, a cross-sectional image of the last ~600 sub-bottom pulses that were recorded, as well as the current position, time, date, course and speed of the survey vessel.

The depths of the sub-bottom reflections were calculated assuming a sound velocity of 1500 m/s. This is a typical velocity for sediments that are water- saturated, which is a reasonable assumption given the rather shallow depths of penetration of the sub-bottom system that was used. Even if velocities varied on the order of 50 m/s, as a function of the different types of sediments and their water content, the possible errors in depth estimations would vary only on the order of tenths of feet for the depth intervals over which the reflections were observed.

Survey results found that the penetration into the sediment was limited in most of the survey area. The seismic data for Mantua Creek and the shallow water area (less than 10 feet) of the Delaware River is strongly indicative of gas in the sediments at the immediate water/sediment interface. This conclusion was supported by the number of strong multiples being seen in the seismic section.

Penetration over the entire survey area was typically less than 5 feet. The sub- bottom profiling was unsuccessful in terms of its ability to detect buried debris or to generate continuous geologic cross-sections of the sub-bottom sediments or bedrock. The principal limiting factors to the quality of the sub-bottom data were the presence of organic, gaseous, materials in the shallow sub-bottom, the relatively shallow water depths, and the similar nature of the sub-bottom sediments in the survey area. Depth of penetration of the sub-bottom acoustic signal was limited primarily by the presence of organic-rich silts in the shallow water. Decomposition of the aquatic vegetation and other organic material in

13

Figure 7 Sample of sub-bottom image showing subsurface reflectors.

these sediments produces gas. Since gases are characterized by very high acoustic impedance (the product of a material’s density and sound velocity) contrasts with surrounding materials, when trapped, they limit the passage of sound waves deeper into the sub-surface. The shallow waters exacerbated the problem of multiples in the sonar data. Multiples are generated by sound energy reverberating in the water column as opposed to penetrating into the sub-bottom. In the sub-bottom profiles, the presence of multiples, which essentially parallel the river and creek bottom, mask the presence of possible deeper reflection events.

In the deeper water of the Delaware River, multiples were less of a problem, with isolated reflectors detected at a maximum depth of 15 feet below the sediment surface. No indication of buried utilities or previous trenches could be seen in the sub-bottom records.

14 III. PROJECT CONCLUSIONS

A geophysical remote sensing obstruction and debris survey was conducted covering the area where future activities are to be conducted in the mouth of Mantua Creek and along the eastern shoreline of the Delaware River for the Port of Paulsboro in Gloucester County, New Jersey. The area within Mantua Creek that was surveyed extended from shoreline to shoreline and 825 feet upstream from the end of the southern jetty protecting its entrance into the Delaware River. The area of the Delaware River that was surveyed included an area extending approximately 3,150 feet downstream from the end of the north jetty of Mantua Creek and extending from nearly the shoreline to a distance of approximately 625 feet into the river from the existing pier structures. The areas surveyed encompassed the entire area where future dredging activities may occur. The primary goal of the geophysical survey was to detect the presence of exposed and buried debris and submerged utilities and to identify any anomalies as accurately as possible that could be impacted by future activities.

The geophysical survey conducted on October 26, 2009. Technologies and techniques employed included side scan sonar, magnetometer, sub-bottom profiler, and DGPS. Survey lines spaced 50 feet apart were run parallel to the shoreline using the side scan sonar, magnetometer, and sub-bottom profiler. The survey methodology was designed to provide data indicating the position and relative size of exposed targets in the survey area, as well as archaeological data essential for complying with the National Historic Preservation Act of 1966, as amended, through 1992 (36 CFR 800, Protection of Historic Properties) and the Abandoned Shipwreck Act of 1987 (Abandoned Shipwreck Act Guidelines, National Park Service, Federal Register, Vol. 55, No. 3, December 4, 1990, pages 50116-50145).

All operations were conducted using DGPS with a horizontal accuracy of less than 3 feet. The DGPS antenna was mounted directly over side scan sonar and sub-bottom profiler to eliminate offset errors and ensure positions tied directly with the collected data. The magnetometer was towed at a measured fixed distance behind the vessel. Hypack 2009 was used for magnetometer data collection and very accurately models the towfish position based on tow cable length, a catenary factor, and vessel DGPS data.

The magnetic survey was conducted using a Geometrics G-882 marine cesium magnetometer system. The primary objective was to detect exposed and buried debris within the survey area. During the survey, the sensor was towed behind the vessel from the nose tow point to get the sensor as close to the bottom as was safe in the shallow water. The survey area included existing pier steel structures as well as shoreline debris. These features can obscure the magnetic signature of smaller debris if the small debris is in close proximity to the larger structures.

15 The large steel pier in the Delaware River was detectable by the magnetometer from more than 400 feet away and could easily have masked smaller debris located within a 250 foot radius.

Six localized targets were detected during the survey. Targets Mag 1 through Mag 5 are located in or near the cove area in the Delaware River just east of the mouth of Mantua Creek. Target Mag 6 is located in deeper water in the Delaware River near the northwestern end of the survey area. A known sewer outfall was detected. The depth of burial of the outfall is not known. Target Mag 1 is a large anomaly located just to the east of the end on the sewer outfall. Targets Mag 2 and Mag 3 are located approximately 60 to 80 feet east of the sewer outfall. Target Mag 4 is located approximately 140 feet west of the sewer outfall. The short duration of these three anomalies indicates they are likely to be located near the sediment surface. Target Mag 5 is a complex collection of magnetic anomalies which was detected on five survey lines. The nature of the material generating the anomalies which make up Mag 5 and Mag 6 could not be determined from the surveys conducted. None of the magnetic anomalies were associated with targets in the side scan sonar records, indicating that all of the material generating the anomalies lies buried below the river sediment.

An Edgetech 4100-FS dual frequency 100kHz/500kHz side scan sonar system was used for this survey. Range scale was set to 50 meters, which resulted in greater than 300 percent insonification of the river bed. When analyzing the side scan mosaic, areas of submerged vegetation can be seen in the shallow waters along the southern shoreline within Mantua Creek and in the shallow water of the Delaware River. The remains of what appears to be a small dock measuring approximately 100 feet by 25 feet can be seen along the southern shoreline of Mantua Creek approximately 530 feet upstream of the end of the southern jetty. Small scattered objects can be seen within the channel of Mantua Creek. What appears to be two large logs/trees can be seen in the Delaware River, one in shallow water and one in deeper water off of the eastern end of the existing pier structures. Other scattered debris can be seen in the Delaware River within approximately 40 feet of the existing pier structures. None of the side scan sonar targets have signatures which appear to be indicative of submerged cultural resources.

An ODEC Stratabox sonar system was used to collect the sub-bottom profiling data during the survey. The principal objective of the survey was to collect sub- bottom images to detect the presence of utility crossings of the river that may be impacted by future vibracoring operations. During the survey, the transducer was hard-mounted to the side of the survey vessel with the navigational antenna mounted directly over the transducer, eliminating offset errors. The sensor was deployed at a depth of 3 feet to minimize interference from the vessel. The navigational data was logged at one-second intervals by the ODEC Stratabox digital recording system

16 Sub-bottom survey results found that the penetration into the sediment was limited in most of the survey area. The seismic data for Mantua Creek and the shallow water area (less than 10 feet) of the Delaware River is strongly indicative of gas in the sediments at the immediate water/sediment interface. This conclusion was supported by the number of strong multiples being seen in the seismic section.

Penetration over the entire survey area was typically less than 5 feet. The sub- bottom profiling was unsuccessful in terms of its ability to detect buried debris or to generate continuous geologic cross-sections of the sub-bottom sediments or bedrock. The principal limiting factors to the quality of the sub-bottom data were the presence of organic, gaseous, materials in the shallow sub-bottom, the relatively shallow water depths, and the similar nature of the sub-bottom sediments in the survey area. Depth of penetration of the sub-bottom acoustic signal was limited primarily by the presence of organic-rich silts in the shallow water. Decomposition of the aquatic vegetation and other organic material in these sediments produces gas. Since gases are characterized by very high acoustic impedance (the product of a material’s density and sound velocity) contrasts with surrounding materials, when trapped, they limit the passage of sound waves deeper into the sub-surface. The shallow waters exacerbated the problem of multiples in the sonar data. Multiples are generated by sound energy reverberating in the water column as opposed to penetrating into the sub-bottom. In the sub-bottom profiles, the presence of multiples, which essentially parallel the river and creek bottom, mask the presence of possible deeper reflection events.

In the deeper water of the Delaware River, multiples were less of a problem, with isolated reflectors detected at a maximum depth of 15 feet below the sediment surface. No indication of buried utilities or previous trenches could be seen in the sub-bottom records.

17

Appendix A

Equipment Specifications

Through this Request for Proposals, the Gloucester County Improvement Authority (GCIA), on behalf of the Port Corporation (SJPC) seeks to engage a specialty consultant for the term from the date the successful contractor is issued a notice to proceed letter until completion of the work on or before December 31, 2010. This contract will be awarded through a fair and open process pursuant to N.J.S.A.. 19:44A-20.4 et seq.

The Specialty Consultant’s Standard Requirements of Technical Proposal (items A thru M) and Cost Proposal must be received and will be publicly opened and read aloud on July 9, 2010 at 1:00 P.M. at the GCIA administrative office located at 109 Budd Boulevard, Woodbury, New Jersey. Each specialty consultant is advised that compliance with the “Fair and Open Standardized Submission Requirements and Selection Criteria” is required. Incomplete proposals will be rejected from further consideration. The “Fair and Open Standardized Submission Requirements and Selection Criteria” must be obtained by contacting Danae Ciociola or Megan Kerr of the GCIA at 856-848-4002.

The following is a description of the professional services needed including, where appropriate, a brief description of the tasks involved:

Scope of Services

In support of the Paulsboro Marine Terminal development program, a comprehensive dredging program is planned. In consultation with Federal and State regulatory agencies and prior to the commencement of dredging, a Phase I underwater archaeological survey of the proposed dredging area footprint is to be performed in order to identify the presence or absence of submerged archaeological deposits. The Phase I Underwater Archaeological Survey scope of work is to be performed in accordance with the Secretary of the Interior’s Standards and Guidelines for Archeology and Historical Preservation and the New Jersey State Historic Preservation Office (NJSHPO)’s Guidelines for Phase I Archeological Investigations: Identification of Archaeological Resources and Guidelines for Preparing Cultural Resources Management Archaeological Reports Submitted to the Historic Preservation Office. Evaluations to determine the National Register eligibility of archaeological sites must be in keeping with the National Park Service’s 2000 National Register Bulletin, Guidelines for Evaluation and Registering Archeological Properties. The individual(s) that shall conduct the work must meet the relevant Secretary of the Interior’s Professional Qualifications Standards for archaeology.

The Specialty Consultant is to compile the findings into a comprehensive draft Phase I Underwater Archaeological Survey Report and submit to the GCIA.

Incorporate GCIA comments as appropriate into a Final Phase I Underwater Archaeological Survey Report and submit six (6) original final reports and an electronic (PDF) version of the final report to the GCIA.

The Paulsboro Marine Terminal dredging areas are highlighted in the attached Dredging Plan, which was created by CH2MHILL and is dated May 2010. The dredging areas, side slopes and transition areas are defined in the LEGEND.

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The Paulsboro Marine Terminal is located east of 303 Mantua Avenue, in the Borough of Paulsboro, County of Gloucester, New Jersey. From a regional perspective, the Paulsboro Marine Terminal is located across the Delaware River from the International Airport. As indicated in Figure 1, which was obtained from NJSM, is dated August 2007 and is titled, “Previously Identified Archaeological Resources and Structures Potentially Greater Than 50 Years of Age”, literature may indicate that a military engagement of 1777 may have resulted in the running aground of a British Sloop named the Merlin along the southern bank of the Delaware River in the vicinity of the confluence of the Mantua Creek.

In response to this potential, the GCIA conducted a geophysical remote sensing obstruction and debris survey within the proposed dredging area. The results of this effort are detailed in a Technical Report, Obstruction Survey for Future Activities at the Port of Paulsboro, Gloucester County, New Jersey, dated October 15, 2009. A copy of this report is included in the RFP materials.

SCHEDULE Upon receipt of a Notice-To-Proceed, the Specialty Consultant shall commence the work within a period of 10 business days. A notice to proceed is targeted for late July 2010. The Specialty Consultant is to include a bar chart schedule that depicts the time frame required to complete the scope of services indicated above.

INSURANCE Consultant is to include a copy of proposed insurance coverage with the technical proposal documents. In addition to the Gloucester County Improvement Authority, the South Jersey Port Corporation is to be included as additional insured.

COST PROPOSAL FORMAT The Authority requires that the proposer provide a lump sum price for the scope of services. The lump sum price shall include all labor and materials to complete the scope of services and shall be provided in number and written format.

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Figure 1 - Previously Identified Archaeological Resources and Structures Potentially Greater Than 50 Years of Age Source: NJSM, August 2007

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