LAW OFFICES / Q I t- l^ COHEN, SHAPIRO, POLISHER ...law offices / q i t- l^ cohen, shapiro,...

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3 A. SLUM EDWARD N. POLISHER TELECOPIER: (215) 592-4329 DAISY B BARRETO* JOHN F, LICARI*FLl, BROOMAN* ROSLYN G. POLLACK RITA M. BOSELLI* UNDA A. LIGHTMANAt

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351-2054DIRECT DIAL:

June 19, 1990

HAND DELIVERY

rDiane WalkerProject ManagerUnited States EnvironmentalProtection Agency - Region III841 Chestnut BuildingPhiladelphia, PA 19107

RE: Dublin, Pennsylvania TCE Site ;. ~r^Proposed NPL Listing_______

t

Dear Diane:

Pursuant to your request, enclosed please find a copy ofthe report entitled "Results of Source Investigation, 120 MillStreet Site, Dublin Borough, Pennsylvania", prepared byGeraghty & Miller, Inc., Consultants.

Very/-truly yours,

JPJ:dkEnclosurecc: Jeffrey Teitel, Esquire

Donald BuninRobert SaarJudah I. Labovitz, Esquire

'nvironmental Services

29° Vincent Avenuerrj> \/TTT T cn rxrr-1 Hackensack. New Jersey 07601C? MlLL,t.K. IINL.. (2oi) 646-1400'nvironmental Services (FAX): (201) 64iflfetf

June 6, 1990

FEDERAL EXPRESS

Mr. Robert Day-LewisPennsylvania Department of

Environmental Resources1875 New Hope StreetNorristown, Pennsylvania 19401

RE: Source Investigation Report, 120 Mill Street Site - Dublin, Pennsylvania

Dear Mr. Day-Lewis:

Enclosed please find a report entitled "Results of Source Investigation, 120 MillStreet Site, Dublin Borough, Pennsylvania."

Please feel free to contact us if you have any questions or require additionalinformation.

Sincerely,

GERAGHTY & MILLER, INC.• ' '

arbara A. DolceSenior Hydrogeologist

Robert A. Saar, Ph.D.Principal Consultant

BAD:gv#K ••'21202/060490.

Ground-Water Geraghty & Miller Hydrocarbon Envirô r̂ n̂ Q Q 7 OMffler InformationConsultants Engineers Services Restoration G** Center •

RESULTS OF SOURCE INVESTIGATION120 MILL STREET SITE

DUBLIN BOROUGH, PENNSYLVANIA

Prepared for

Sequa Corporation3 University Plaza

Hackensack, New Jersey 07601

June 1990

Geraghty & Miller, Inc.Environmental Services290 Vincent Avenue


M3087WGERAGHTY & MILLER. INC.

CONTENTS

Page

EXECUTIVE SUMMARY ......................................... 1

INTRODUCTION ............................................... 2

FIELD AcnvrnES ............................................. 2Geophysical Survey .......................................... 2Soil Vapor Sampling ......................................... 3

Vapor Wellpoint Installation .............................. 3Vapor Sampling ....................................... 4

Exploratory Borings and Soil Sampling ............................ 4

RESULTS ..................................................... 5

Geophysical Survey .......................................... 5Soil Vapor Sampling ......................................... 6Exploratory Borings ......................................... 6Soil Sampling and Analysis .................................... 6

CONCLUSIONS ................................................. 7

TABLES

1. Vapor Wellpoint Construction Details, 120 Mill Street Site, Dublin, Pennsylvania.

2. Vapor Wellpoint Sampling Results, 120 Mill Street Site, Dublin, Pennsylvania.

3. Concentrations of Volatile Organic Compounds in Soil Samples from the 120 MillStreet Site, Dublin, Pennsylvania.

FIGURES

1. Vapor Wellpoint Locations, 120 Mill Street Site, Dublin, Pennsylvania.

2. Vapor Wellpoint Construction Diagram, 120 Mill Street Site, Dublin, Pennsylvania.

3. Soil Boring Locations, 120 Mill Street Site, Dublin, Pennsylvania.

4. Magnetic Anomalies, 120 Mill Street Site, Dublin, Pennsylvania.

GERAGHTY & MILLER. INC.

APPENDICES

A. PADER Approval of Source Investigation.

B. Magnetic Geophysical Survey.

C. Vapor Wellpoint Geologic Logs.

D. Vapor Sampling Field Methods.

E. Geologic Logs of Exploratory Borings.

F. Precipitation Records for Vapor Monitoring Period.

G. Laboratory Analytical Results.

GERAGHTY & MILLER, INC.

IRESULTS OF SOURCE INVESTIGATION

120 MILL STREET SITEDUBLIN BOROUGH, PENNSYLVANIA

EXECUTIVE SUMMARY

Geraghty & Miller, Inc. was retained by Sequa Corporation to investigate andidentify potential contamination sources at the 120 Mill Street site in Dublin, Pennsylvania.The investigation included a magnetic geophysical survey, soil vapor sampling, exploratoryborings, and soil sampling.

Several anomalies were identified from the survey. These anomalies, along withidentified locations of relatively high concentrations of vapors, primarily trichloroethene(TCE), were used to determine appropriate exploratory boring locations. Several of theanomalies appear to result from metal in nearby buildings and the others, based onsubsequent work, do not appear to be related to substantive sources of contamination.Twenty shallow (less than 10 ft deep) exploratory borings were completed at the site. Soilsampling was conducted in conjunction with the exploratory boring program. Samples foranalysis were collected based on appearance and screening with a vapor detectioninstrument.

Fifteen soil samples were submitted for analysis of volatile organic compounds byU.S. Environmental Protection Agency (USEPA) Method 8240. TCE was detected in foursamples. Three samples had concentrations of less than 20 micrograms per kilogram(ug/kg) [0.02 parts per million]. One sample (B-16) had a TCE concentration of 2000ug/kg (2 parts per million).

Substantive sources, which would add materially to the TCE present in the bedrockplume, were not detected at the site based on the magnetic geophysical survey, soil vaporsampling, an exploratory boring program, and soil sampling. No remedial action measuresfor shallow soil are warranted based on the investigation.

68300787GERAGHTY & MILLER, INC.

INTRODUCTION

Geraghty & Miller, Inc. was retained by Sequa Corporation (Sequa) to perform asource investigation at the 120 Mill Street site in Dublin, Pennsylvania. This program wasdescribed in the June 1989 work plan entitled "Source Investigation Work Plan, 120 MillStreet Site and Conceptual Remedial Alternatives for the Bedrock Aquifer UnderlyingDublin Borough, Pennsylvania." The source investigation portion of the work plan wasapproved by the Pennsylvania Department of Environmental Resources (PADER) incorrespondence dated October 31, 1989 (Appendix A).

Previous investigative work conducted at the facility by other consultants involveda soil vapor survey and soil sampling and installation of two monitoring wells. These resultsare briefly described in the work plan.

This report provides a summary of the field activities which were completed at thesite. Detailed soil logs and other supporting data are provided in the appendices as is thecomplete report on the magnetic geophysical survey conducted at the site.

FIELD ACTIVITIES

The source investigation consisted of four field activities as described below.

1. Geophysical Survey2. Soil Vapor Sampling3. Exploratory Borings4. Soil Sampling

Geophysical Survey

A magnetometer survey was conducted at the site on December 6 and 7, 1989.Before conducting the survey, a 100 x 100 ft grid was established in the study area. Details


of the survey are provided in Appendix B. The grid was used to set up stations every 10ft (Figure 1 of Appendix B). A GSM 19 magnetometer/gradiometer was positioned ateach of the 1360 stations and magnetic field measurements and field gradient measurementswere made.

Soil Vapor Sampling

A soil vapor survey was conducted using shallow wellpoints. The 2-inch diameterwellpoints were installed to penetrate the shallow clayey overburden.

Vapor Wellpoint Installation

Continuous split-spoon samples were taken during installation of the boreholes,which were advanced until bedrock was encountered. Borings were drilled using thehollow stem auger (HSA) method. Logs of the materials in each of the boreholes areprovided in Appendix C.

Wellpoint installation was conducted in two phases to provide an interim period foroptimizing the vapor sampling procedures. The first phase involved the installation of fivewellpoints in December 1989. Construction details of these wellpoints (identified as VW-1, VW-2, VW-3, VW-4, and VW-5) are summarized in Table 1 and their locations areshown in Figure 1.

The second phase of installation involving 15 wellpoints was conducted duringJanuary 15-18,1990. The vapor wellpoint locations are shown on Figure 1 and constructiondetails are provided in Table 1. The wellpoints were constructed from 2 ft of 2-inchdiameter PVC screen (0.010-inch slot) and sufficient casing to bring the wellpoint near toground surface. A bentonite seal and cement/bentonite grout filled the annulus above thegravel pack, which surrounds the screen. A 3/4-inch diameter PVC sampling tube wassealed into the wellpoint as shown on Figure 2.

HR300789GERAGHTY & MILLER. INC.

Vapor Sampling

Preliminary vapor sampling was conducted on December 27,1989 and results appearin Table 2. Two subsequent rounds of vapor sampling were conducted on January 29, 1990and February 9, 1990. Procedures were as described in the work plan with the exceptionof a pumping time study, which was conducted at the beginning of each sampling event, andinjection of standards five times at the start of each event. A multipoint calibration was notconducted. More detail on the field methods procedures is provided in Appendix D.Boring logs are provided in Appendix F.

Water accumulation in the bottom of several wellpoints (VW-1, VW-8, VW-9,VW-10, VW-11, VW-15, VW-16, and VW-20) precluded the measurement of vapors duringone or more sampling events. Potential sources of the water include precipitationinfiltration and/or nearby utilities (storm sewers and sanitary sewers) or permeable backfillsurrounding the utilities. The December 1989 sampling was conducted after approximately2 weeks with little precipitation; precipitation records are provided in Appendix F. Onlyone of the five wellpoints sampled had accumulated water. The next two sampling eventswere conducted after a rainier period and, therefore, more vapor wellpoints had water.

Some of the wellpoints were evacuated so that vapor analysis could be completedduring the February 9, 1990 sampling event (VW-2, VW-3, VW-4, VW-5, VW-6, VW-7,VW-12, VW-13, VW-14, VW-17, and VW-18). However, the vapor readings may have beenaffected by uncapping the wellpoint for evacuation and by the shorter period of vaporaccumulation compared to other wells in which water had not accumulated and which wereundisturbed for 2 weeks or more before sampling.

Exploratory Borings and Soil Sampling

Geophysical and vapor survey results were used to select boring locations in severalareas of the facility. Borings were targeted for areas where magnetic anomalies werepresent and/or where relatively high organic vapor concentrations were detected. Borings

GERAGHTY & MILLER. INC. **** ̂ "

were completed on February 22 and 23, 1990 and were identified as B-l through B-19(including B-14A, B-14B, and B-14C; B-5 was a field blank) and are shown on Figure 3.The borings were completed to depths ranging from 4.5 to 8.9 ft below ground surface(bgs). Borings were installed by the HSA drilling method; the logs for each hole appearin Appendix F. Split-spoon samples were collected continuously from ground surface to thecompleted depth. Samples were screened using an HNu™ photoionization detector. Onesample was collected from each of the borings for possible laboratory analysis. Sampleselection was biased toward high organic vapor concentration and the identification of visualevidence of contamination. Samples from Borings B-9, B-14A, B-14B, B-18, and B-19 werenot submitted for laboratory analysis because organic vapor readings using the fieldinstrument were low or below detection and because of a high density of samples submittedfor analysis near these boring locations.

RESULTS

Geophysical Survey

Seven anomalies as shown on Figure 4 were identified from the magnetometersurvey. Four of the anomalies resulted from close proximity to the buildings on-site and/orsurficial metal objects (Bl, B2, B3, and B4). The remaining anomalies were consideredin the selection of boring location. Borings were completed in proximity to anomaliesidentified as Al, A2, and A3.

The magnetic geophysical survey resulted in the identification of three magneticanomalies labeled Al, A2, and A3 (Figure 4 of Appendix B). Anomaly Al has a significanttotal field and vertical gradient amplitude and covers several data points. Anomaly Al mayresult from a reinforced concrete structure, such as those used as septic tanks. Thisanomaly is close to septic tank manholes in the area of the Quonset Hut. Anomaly A2 isa one-point anomaly with a very small total field amplitude and no clear vertical gradientamplitude and can be discounted. Anomaly A3 is close to Building 1 and has a much

GERAGHTY & MILLER, INC. A R

smaller area than Anomaly A2. This anomaly probably results from metal in the buildingfoundation.

;

Soil Vapor Sampling

Several areas of elevated organic vapor concentrations were detected in one or morerounds of vapor sampling. TCE was detected at measurable concentrations at wellpointsVW-5, VW-12, VW-13, VW-14, VW-18, and VW-19. Vinyl chloride and/or trans-1,2-dichloroethene were detected at wellpoints VW-2, VW-3, VW-5, and VW-14. These resultsare summarized in Table 2. The location with the highest total quantifiable organic vaporconcentration was VW-5. Elevated vapor concentrations were also detected at VW-14;however, the presence of water in the wellpoint prevented quantification. Organic vaporconcentrations were not detected at wellpoints VW-6, VW-7, and VW-17. The locationsof high vapor readings together with areas with magnetic anomalies provided the rationalefor selection of boring locations.

Exploratory Borings

Twenty shallow borings were installed at various locations throughout the site. Mostof the borings were located in the eastern portion of the facility and correspond to magneticanomalies and/or elevated vapor readings. At least two locations in this general area weresites of drum storage in the past: the Quonset Hut and near the Building 1 loading dock.Boring locations are shown on Figure 3. No drums, tanks, or other underground structureswere encountered during the drilling.

Soil Sampling and Analysis

Soil sampling was conducted in conjunction with installation of exploratory borings.Split-spoon samples of the unconsolidated material, which were collected during drilling,were screened in the field with a portable organic vapor detector and inspected for visualsigns of contamination. In borings where levels of volatile organic compounds were

GERAGHTY & MILLER, INC. fti3G0?92

7

detected significantly above background concentration, the highest interval was submittedfor laboratory analysis. Samples were analyzed by NET Atlantic, Inc. (formerly Cambrid^ -Analytical Associates, Inc.) for volatile organic compounds by Method 8240. Results aresummarized in Table 3. The laboratory report is provided as Appendix G.

TCE and trans-l,2-dichloroethylene were detected in some soil samples. TCE wasdetected in samples B-ll (17 ug/kg), B-14C (13 ug/kg), B-16 (2000 ug/kg), and B-17 (18ug/kg). Trans-l,2-dichloroethylene was detected at a concentration of 6 ug/kg in sampleB-14C.

Ethylbenzene and xylene were detected in sample B-12 at a combined concentrationof approximately 60,000 ug/kg. Sample B-15 contained approximately 3,000 ug/kg ofxylene. The presence of these levels of aromatic volatile organic compounds precludedthe detection of volatile organic compounds at levels less than 5,000 ug/kg in sample B-12 and 500 ug/kg in sample B-15. The samples were from shallow depths and may reflectimpacts from oil and fuel leakage onto the paved parking lot.

CONCLUSIONS

TCE was detected in soil at one location (B-16) at 2000 ug/kg. This level, whichis equivalent to 2 ppm, is not indicative of free product or a substantive source. Theconcentrations detected at other locations are less than 20 ug/kg (0.02 parts per million).

GERAGHTY & MILLER. INC. ftR300793

8

occurrence of TCE at B-16 appears to be localized based on the analytical results of soilsamples collected from other nearby borings. The limited depth interval in which fieldscreening detected vapors and the results of soil and soil vapor sampling indicate thatremedial action is not justified for the subsurface materials under the 120 Mill Street Site.

Respectfully submitted,


#NY21202/042690.

John P. MihalichStaff Hydrogeologist

'Barbara A. DolceSenior Hydrogeologist

Robert A. Saar, Ph.D.Principal Consultant/Project Officer

GERAGHTY & MILLER, INC. 007

Table 1. Vapor Well Construction Details. 120 Mill Street. Dublin, Pennsylvania.

Vapor WellNumber

VW-1

VW-2

VW-3

VW-4

VW-5

VW-6

VW-7

VW-8

VW-9

VW-10

VW-11

VW-12

VW-1 3

VW-14

VW-15

VW-16

VW-1 7

VW-1 8

VW-1 9

VW-20

DateInstalled

12-20-89

12-21-89

12-21-«9

12-21-49

12-21-89

1-15-90

1-15-90

1-15-90

1-16-90

1-16-90

1-16-90

1-16-90

1-16-90

1-17-90

1-17-90

1-17-90

1-17-90

1-17-90

1-18-90

1-18-90

Depthto Bedrock

(ft bgs)

8.5

8.5

4.5

6.5

6.5

3.5

5.0

6.5

6.0

6.5

6.5

5.0

8.0

7.0

6.5

7.0

6.5

6,0

4.0

5.0

Total Depthof Boring

(It bgs)

9.5

9.5

5.3

7.5

7.5

5.0

6.0

7.5

7.5

7.5

7.5

6.0

8.5

8.0

7.5

8.0

7.5

7.0

5.0

5.5

ScreenedInterval

(ft bgs)

7.5-9.5

7.5-9.5

3.3-5.3

5.5-7.5

5.5-7.5

3.0-5.0

4.5-6.5

5.5-7.5

5.5-7.5

5.5-7.5

5.5-7.5

4.0-6.0

6.5-8.5

6.0-8.0

5.5-7.5

6.0-8.0

5.5-7.5

5.0-7.0

3.0-5.0

3.5-5.5

Depth ofPVC Seal

(ft bgs)

7.3

7.0

2.8

5.0

5.0

2.5

4.0

5.0

5.0

5.0

5.0

3.5

6.0

5.5

5.0

5.5

5.0

4.5

2.5

3.0

i, «Sandpack

(ft bgs)

7.0-9.5

7.0-9.5

3.0-5.3

5.0-7.5

5.0-7.5

3.0-5.0

4.0-6.0

5.5-7.5

5.5-7.5

5.5-7.5

5.5-7.5

4.0-6.0

6.5-8.5

6.0-8.0

5.5-7.5

5.5-8.0

5.5-7.5

5.0-7.0

3.5-5.5

3.5-5.5

Grout/Bentonite Pellets

(ft bgs)

0.5-5.0/5.0-7.0

0.5-5.0/5.0-7.0

0.5-2.0/2.0-3.0

0.5-4.0/4.0-5.0

0.5-3.5/3.S-5.0

0.5-1.0/1.0-3.0

0.5-2.0/2.0-4.0

0.5-3.5/3.5-5.5

0.5-3.5/3.5-5.5

0.5-3.5/3.5-5.5

0.5-3.5/3.5-5.5

0.5-2.0/2.0-4.0

0.5-4.5/4.5-6.5

0.5-3.5/3.5-5.5

0.5-3.5/3.5-5.5

0.5-3.5/3.5-5.5

0.5-3.5/3.5-5.5

0.5-3.0/3.0-5.0

0.5-1.0/1.0-3.0

0.5-1.5/1.5-3.5

HighestHNu Reading

(ppm)

0.3

9.0

7.2

0.3

0.3

ft bgs Feet below ground surface.ppm Parts per million.Overburden consists of reddish-brown clay with silt, very fine sand and bedrock fragments.Continuous split-spoon camples taken.Blanks indicate HNu readings equal to background (approximately 0.2 ppm).Wells constructed of 2-inch diameter, flush-jointed PVC screen and outer casing and 3/4 inch PVC inner casing.PVC seals are flush-jointed between screen and casing.Inner casing is pipe-threaded into center of PVC seal and extends to ground surface.Rubber neoprene stoppers have been inserted into top of inner casing.Wells are flush-mounted with 6-inch diameter protective steel casings; cement collars em placed around steel casings.Wells installed by Samuel Stothoff Co., Inc. of Flemington, New Jersey.

VWCONST.NY21202

GERAGHTY & MILLER. INC. ft 1 3 007 96

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APPENDIX A

PADER APPROVAL OF SOURCE INVESTIGATION


— e © w E n d -5- : s i G s, r-i

COMMONWEALTH OF PENNSYLVANIADEPARTMENT OF ENVIRONMENTAL RESOURCES

1875 New Hope StreetNorristown, PA 194

215 270-1975

October 31, 1989

Dr. Robert A. SaarGeraghty & Miller, Inc.125 East Bethpage RoadPlainview, New York 11803

^!jlll\ a. ' i _J

Re: Source Investigation Work Plan120 Mill Street SiteDublin Borough, Bucks County

Dear Dr. Saar:

This is in response to your October 10, 1989 written request for theDepartment's approval for the implementation of the on-site source investigationat the referenced site.

The June 1989 Source Investigation Work Plan has been reviewed by our office andwas Che subject of discussion in our meeting of September 21, 1989. This partof the Work Plan is satisfactory.

Approval to proceed with the on-site investigation tasks is hereby granted.

Comments concerning the Conceptual Remedial Alternatives part of the June 1989 •report will be forwarded upon our completion of the review of your October 19,1989 supplemental information concerning on-site remediation.

Very truly yours ,

ROBERT E. DAY-LEWISHydrogeologist

cc: Ms. DolceMr. Hartzell, EROCCMr. FeolaMr. O'NeilRe 30 (AS2)296.10

•umox00

APPENDIX B

MAGNETIC GEOPHYSICAL SURVEY

GERAGHTY & MILLER. INC. W 1C a il U O f


120 Mill Street SiteDublin, Pennsylvania

December 1989

Prepared for

Sequa Corporation3 University Plaza


Geraghty & Miller, Inc.1391 North Speer Boulevard

Suite 330Denver, Colorado 80204

GERAGHTY & MILLER. INC. A.R

CONTENTS

Page

INTRODUCTION ................................................ 1

DATA ACQUISITION ............................................. 1

DATA PRESENTATION ........................................... 1

INTERPRETATION .............................................. 2

CONCLUSIONS .................................................. 4

FIGURES

1. Observed Metal Sources, 120 Mill Street Site, Dublin, Pennsylvania.

2. Anomalous Total Magnetic Field, 120 Mill Street Site, Dublin, Pennsylvania.

3. Vertical Gradient Total Magnetic Field, 120 Mill Street Site, Dublin, Pennsylvania.

4. Locations of Magnetic Anomalies, 120 Mill Street Site, Dublin, Pennsylvania.

APPENDIX

A. Magnetic Geophysical Survey Instrumentation and Data Interpretation.



INTRODUCTION

Total magnetic field measurements and vertical gradient of the total magnetic fieldwere taken at the 120 Mill Street site, Dublin, Pennsylvania, on December 6 and 7, 1989.The data was recorded using a GSM 19 magnetometer/gradiometer. The purpose of thesurvey was to identify magnetic anomalies that may result from buried metal. A detaileddiscussion of magnetometer instrumentation and data interpretation is included in AppendixA.

DATA ACQUISITION

Prior to recording the data, lines of stations were surveyed using a 300-foot tape andcompass. A grid with 10-feet spacing was established. A total of 1,360 stations werecreated.

A base station was established and reoccupied at regular intervals to check thediurnal variations of the earth's field. The magnetic data (which consists of field strengthand vertical field gradient) were recorded at each station along the surveyed lines using theGSM 19 instrument. In addition, to aid in the screening of anomalies caused by above-ground features, notes were made regarding the locations of any metal objects observedduring the survey. These observations are recorded on Figure 1, along with the locationsof the main buildings at the site.

DATA PRESENTATION

The base station data showed that no significant magnetic storms occurred duringthe survey and that the application of a correction for the diurnal drift was not necessary.Prior to plotting the total magnetic field data, it was converted to anomalous magnetic fielddata by subtracting 54,800 gammas (the background field) from each of the data values.This calculation produced numbers centered around zero, but did not change the shape or

AR3008I5GERAGHTY & MILLER. INC.

location of any of the anomalies. The data were then contoured using a commercialcomputer plotting program called Surfer™, which was developed by Golden Software Inc.,Golden, Colorado. The anomalous magnetic field data are presented on Figure 2 and thevertical gradient data are shown on Figure 3. These maps are used in the interpretationof the data. Registration marks are shown on these maps so that they can be overlaid onFigure 1.

INTERPRETATION

The interpretation consisted of a careful visual inspection of both the anomalousmagnetic field contour map (Figure 2) and the vertical gradient contour map (Figure 3).In general, the vertical gradient contour map emphasizes anomalies that result from shallowburied metal objects. Most of the sources of the anomalies at this site result from featuresonly a few feet deep.

The anomalous magnetic field data (Figure 2) show a number of anomalies, manyof which are adjacent to the buildings at the site and/or are associated with subsurfacepiping. In the northwestern quadrant of the map, only very small anomalies can be seen,along with a north trending linear feature at X=-310 ft. In the northeastern quadrant,another linear feature is evident, trending initially along the Y axis (at X=-110 ft), thentowards the northeastern corner of the map. These features are consistent with the knownpresence of underground pipes which may be made of metal or reinforced with metal.There are a series of anomalies in the northeastern quadrant of the map between X=0 ftand X=30 ft and Y=0 ft and Y= 130 ft. These anomalies are associated with undergroundpiping and a well. There is an anomaly in the northern portion of the.survey area at X=20ft, Y = 120 ft. This anomaly is associated with a well which feeds a firewater tower in thenorthern portion of the site. The vertical gradient data shows the same basic patterns asdoes the anomalous magnetic field data, and therefore reinforces the pipelineinterpretation.

GERAGHTY & MILLER, INC.W300816

To locate anomalies that may result from buried metal, it is necessary to account forthose anomalies which result from known sources of metal. To do this, the map showingknown features (Figure 1) was superimposed on the anomalous magnetic field map todiscount those anomalies local to the observed metal objects and likely to have resultedfrom them. The anomalies which remain unaccounted for are shown in Figure 4.

These remaining anomalies are labelled Al through A3 and Bl through B4. Theanomalies prefixed with a B are all local to the buildings and are assumed to result frommetal associated with the buildings. The anomalies with prefix A should be investigatedto ascertain their source. All of these anomalies result from shallow sources as shown bythe small areas of the anomalies and by the vertical gradients, which are similar to thosefound over the known shallow metal sources. Anomaly Al is more significant thanAnomaly A2. Anomaly A2 is a very weak anomaly, probably with very little significance.However, it is worth examining. Anomaly A3 is close to a building. However, it is isolatedand well defined and should also be investigated.

A Metromag™ Model 880 Ferromagnetic Locator was used in an attempt to explainthe anomalies indicated from the magnetic geophysical survey. Anomalies Al through A3and Bl through B4 were scanned with this instrument. It was determined that anomaliesBl, B3, and B4 are associated with the buildings on site. Anomaly B2 results from anunderground storage tank. The locator did not detect any metal in the areas of anomaliesA2 and A3. The locator did indicate the presence of metal below ground surface over acircular area, approximately 4-feet in diameter, at the location of Anomaly Al. There areno obvious surface or known subsurface features which would explain Anomaly Al.However, it is close to an underground sewer line and may be related to the sewer system.

To estimate the amount of metal giving rise to these anomalies, it is instructive tocompare these anomalies with those which occur local to observed metal objects. The twomost clearly defined known metal objects are the monitoring well cover at X=-20, Y=40and the manhole cover at X=-280, Y = 180. Anomaly Al is somewhat smaller than thatresulting from the monitoring well cover and Anomaly A2 is much smaller. These

AR3008I7GERAGHTY & MILLER. INC

comparisons enable approximate estimates of the amount of metal responsible for theanomalies Al and A2. Note, however, that the type or exact shape of the buried metal isunknown, the magnetic method is unable to determine the exact shape of buried metalobjects.

CONCLUSIONS

The anomalous magnetic field results and the vertical gradient results both showconsistent patterns of anomalies. This agreement shows that the data quality is good andthat the anomalies are repeatable. Once the influence of observed metal sources isaccounted for in the magnetic data and the anomalies close to buildings are assumed toresult from metal structures within the buildings, only three anomalies remain. Of these,one is significant (Anomaly Al) and requires further investigation. Of the remaining two,one is close to a building (Anomaly A3) and one is very weak (Anomaly A2).

Respectfully submitted,


Ed WightmanPrincipal Geophysicist

BAD:cmw/llc

#NY21202/040990.

GERAGHTY fi? MILLER. INC.

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APPENDIX A

Magnetic Geophysical Survey Instrumentation and Data Interpretation

Instrumentation

A GSM 19 magnetometer/gradiometer was used to gather data for the Dublin,Pennsylvania survey. The instrument is manufactured by GEM Systems of Toronto,Canada. It uses two sensors about 0.5 meters apart to record the vertical gradient. Duringthe survey at the 120 Mill Street site, the lower sensor was positioned a little more than 1meter above the ground surface. The instrument records the magnetic field strength ingammas and the vertical gradient in gammas per meter.

The instrument is a proton precession magnetometer using the Overhauser effect forproton polarization. Proton magnetometers use the precession of spinning protons, ornuclei of the hydrogen atom, in a sample of proton rich fluid (water or hydrocarbons) tomeasure the total magnetic intensity. The protons, which behave like small magnets, aremade to spin much like a spinning top. These magnets are temporarily aligned, orpolarized, by the application of a uniform magnetic field generated by a current in a coilof wire. When the current is removed, the spin of the protons causes them to precessaround the direction of the ambient, or earth's magnetic field much as a spinning topprecesses around the gravity field. The precessing protons then generate a small signal inthe same coil used to polarize them, a signal whose frequency is precisely proportional tothe total magnetic field intensity and independent of the orientation of the magnetometersensor. The proportionality constant which relates frequency to field intensity is a wellknown atomic constant called the gyromagnetic ratio of the proton. The precessionfrequency, typically 2,000 hertz (Hz), is measured by digital counters as the absolute valueof the total magnetic-field intensity with an accuracy of 0.1 gamma in the earth's field ofapproximately 50,000 gammas.

The gradiometer sensor is an arrangement of two magnetometer sensors, one abovethe other, so that the difference in their readings is proportional to the vertical gradient ofthe magnetic field. The GSM 19 reads both magnetic sensors simultaneously and not


A-2

sequentially, as is done in some instruments. This type of measurement removes the effectsof diurnal variations and magnetic siorm interferences from ?•• data.

Magnetic Data Interpretation

A large portion of magnetic interpretation is qualitative and requires a goodunderstanding of the basics of magnetic anomalies resulting from buried objects. Theanomalies which form the basis for the magnetic method result from the interaction of theobject (metal) with the earth's magnetic field. If an object contains materials which can bemagnetized such as iron or steel, (or in the case of rocks, magnetite) the earth's magneticfield causes these objects to become magnets and, therefore, to produce a small secondarymagnetic field. This field is superimposed on the earth's magnetic field and is called ananomalous field. Magnetometers are able to detect the small magnetic fields from suchbodies.

The shape of magnetic anomalies depends on the configuration of the source of theanomalies (for example, buried metal) and the orientation of the earth's field vector. Whenthe earth's field vector intercepts the magnetic source, a positive or negative pole isinduced. Figure A schematically shows the total field anomaly which would result from twoobjects: a cubic shaped body (similar to the shape of a drum) buried a few feet into theground and a long well casing. The "N" and "S" placed around the bodies illustrate theinduced north (positive) and south (negative) poles. The positive and negative lobes of theanomaly result from these induced poles surrounding the body. As the sources of theanomalies become deeper, the amplitude of the anomalies decreases and it spreads out tocover a broader area. The orientation of the magnetic source influences the shape of theanomaly. Generally, sources having a limited depth extent will have significant magneticlows as well as associated magnetic highs. A long feature such as a well casing will havea large magnetic high but only a small magnetic low.

Interpreting magnetic-field data involves the ability to recognize anomalies from plotsof the data over an area. Either cross-sections or contour maps can be used. The total


A-3

field contour is usually viewed first and the anomalies are noted. If isolated and welldefined anomalies are present, then these can be approximately modelled to estimate thedepth of the source of the anomaly.

Gradiometer data are taken for several reasons. Since the reading from the totalfield and gradient sensors are taken simultaneously, the resulting gradient is not influencedby time variations in the strength of the earth's field. Gradient data, therefore, providean additional check on the reliability of the total field data. The vertical magnetic gradientis more sensitive to the shallower magnetic sources than is the total field data and is,therefore, used during interpretation to highlight the shallower features. In addition; theedges of the sources of the anomalies are usually more clearly defined by the vertical-gradient data.

#NY21202/040990.

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APPENDIX C

V 4POR WELLPOINT GEOLOGIC LOGS

GERAGHTY & MILLER. INC. ^^ 300828

, & MILLER. INC.Environmental iVnvro . SAMPLE/CORE LOG

Rnring/Wfill VW-1 Project/No. Sequa / NY21202___________________Page 1 nf 1 .Site Drilling 12/20/89 DrillingLocation Dublin. PA_________________ Started 10:35 AM Completed 12:00 NOON '

Type of Sample/Total Depth Drilled 9.5 feet Hole Diameter__6____inches Coring Device Split Spoon_________Length and Diameterof Coring Device 2'/ 2"____=___________________Sampling Interval 0.5 - 8.5 teat

Land-Surface Elev 550 feet u Surveyed Xj Estimated Datum uses______________

Drilling Fluid Used .NA___________________________.Drilling Method HSADrillingContractor Samuel Stothoff__________________Driller Paul_____Helper GaryPrepared . Hammer HammerBy ______John Mihalich_________________________Weight 140 Ibs.Drop 30 inches

Sample/Core Depth Time/Hydraulic(feet below land surface) Core Pressure or HNU

Recovery BlowsperB D^-JJ^,.From To (feet) inches Sample/Core Description Heading

(ppm)

0.5

2.5

6.5

2.5

6.5

8.5

1.0

3.25

2.0

11/55/6

W

\m

CLAY, trace silt. Brown, tight, dry.

CLAY, trace silt, trace very fine

sand, trace fragments of weathered red

shale and greenish-grey shale. Red brown.

tight, dry. Yellow (oxidation) spots.

SILT, some very fine sand, little

fragments of bedrock. Black (oxidation) spots,

greenish-grey weathered bedrock at bottom

of split spoon.

Bottom of hole at 9.5 feet.

B=Background reading (0.2-0.4 ppm).

A&3ftft8?q

B

B

GSM Form 03 6-86 . Soulhpnnt 89-1257

^GERAGHTY'& MILLER. INC.

Environmental Services SAMPLE/CORE LOG

RnnngMtell VW-2 Project/No. SEQUA / NY21202___________________Pags 1 of 1.Drilling 12/20/89 Dri|ling 12/21 /^

on Dublin, PA_________________startc 4:05 PM Completed 1Q;QO ... __Type of Sample/

•utal Depth Drilled 9.5 feet Hole Diameter 6 inches Coring Device Split Spoon______Length and Diameter f (|of Coring Device ___2/2_______________________Sampling- interval 0 ~ 8.0___feet

Land-Surface Flev SSfl feet Z Surveyed E Estimated Datum USGS__________________

Drilling Fluid Used NA__________________________Drilling Method HSADrillingContractor Samuel Stothoff___________________Driller Paul______Helper GaryPrepared Hammer HammerBy ______John Mihalich________________________Weight 140 Ibs.Drnp 30 inches

Sample/Core Depth Time/Hydraulic „(feet below iand surface) Core Pressure or HNu

Recovery Blows per 6 ReadingFrom To (feet) inches Sample/Core Description (ppm)

0

2

4

6

2

4

6

8

0.8

1.75

2.0

2.0

11/76/7

3/55/714/1518/25

17/2636/57

CLAY, and silt, minor very fine sand, minor

red and green shale fragments. Reddish brown,

dry.

CLAY, trace silt. Brown, tight, wet.

CLAY, some silt, trace very fine sand,

trace red and greenish-grey shale fragments.

Reddish brown, dry.

SILT, some very fine sand,

some clay, red "hale (bedrock) at bottom

of spoon. Reddish brown.

Bottom of hole at 9.5 feet."*•

B=Background reading (0 - 0.2 ppm).

B

B

-^GERAGHTY, '& MILLER. INC.Environmental Service.-. SAMPLE/CORE LOG

Bnring/Wfill VW-3 Project/No. SEQUA / NY21202___________________ Page__L__nf 1Site Drilling 12/21/89 DrillingLocation Dublin, PA_________________Started 11:00 AM Completed 12:00 NOON

Type of Sample/Total Depth Drilled 5.3 feet .Hole Diameter 6 inches Coring Device Split Spoon______Length and Diameterof Coring Device 2'/ 2"_______________________Sampling Interval 0.75-4.75 feetLand-Surface Elev._5_50___Jeet u Surveyed 3 Estimated Datum USGS___________________

Drilling Fluid Used NA__________________________Drilling Method HSA______DrillingContractor Samuel Stothoff__________________Driller Paul_________Helper GaryPrepared Hammer HammerBy ______John Mihalich_________________________Weight 140 Ibs.Drnp 30 inches

Sample/Core Depth Time/Hydraulic(feet below land surface) Core Pressure or HNu

Recovery Blows per 6 ReadingFrom To (feet) inches Sample/Core Description °

(ppm)

0.75

2.75

2.75

4.75

1.25

1.75

8/9 !8/10 ' CLAY and SILT, trace very fine sand, trace

10/2141/34

shale fragments. Brown, dry. (Drilled through

asphalt and then a layer of concrete before

hitting soil) .

SILT, some very fine sand and clay, trace

red shale fragments n bottom half of spoon.

Dark reddish brown, dry. Grey siltstone at

bottom of spoon.

Bottom of hole at 5.3' bgs.

B=Background reading (0.2 ppm).

ft&3-OGI!3!Southonnt

r^GERAGHTY'& MILLER. INC.Environmental Services SAMPLE/CORE LOG

Rnring/Well VW-4 Project/No. _____SEQUA / NY21202_______________Page 1 of 1Site Drilling 12/21/89 DrillingLocation Dublin. PA________________ Staged 1:30 pm___ Completed 2:?n pm

Type of Sample/Tola- Depth Drilled 7.5 feet Hole Diameter__6____incnes Coring Device Split Spnnn______Length and Diameterof Coring Device 2'/2"____________________________Sampling Interval 0.7S - 6.7S feet

Land-Surface Elev. 55Q feet Z Surveyed 3 Estimated Datum______USGS___________Drilling Fluid Used NA____________________________Drilling Method HSA_________

Contractor Samuel Stothoff________________Driller Paul Hfl|pflr GaryPrepared T , „.. i • _ Hammer, ... ., Hammer „By ___________John Mihalich_________________Weight 140 Ibs Drnp 30 ,nches

Sample/Core Depth Time/Hydraulic(feet below land surface) Core Pressure or Readi

Recovery Blows per 6 , •From To (feet) inches Sample/Core Description (,PPm/1

0.75:

2.75

4.75

2.75^

4.75

6.75

2

2

1.75

11/79/12

15/1717/21

16/1825/33

CLAY and Silt, minor very fine sand. Trace red shale

fragments. Reddish brown. Drv.

CLAY and Silt, minor very fine. sand. Trace red shale

fragments. Reddish brown. Drv. Some bright green

shalev fragments.

Clav and Silt, minor very fine. Sand minor red. vellow

brown, shalev fragments. Reddish brown. Drv.


B = Background reading C0.1 ppm 'I .

"

W300832

B

Soulhonnt 89-1257

, '& MILLER. INC.Environmental Services SAMPLE/CORE LOG

Rnring/Wfill VW-5 Prnjent/Nn. SEQUA / NY21202__________________ Page 1 of 1Site Drilling 12/21/89 Drjl|jLocation Dublin, PA_________________Started __JLi3p_PM__Completed 4:05 PM

Type of Sample/Total Depth Drilled ' •5 feet _^_Hole Diameter o inches Coring Device Split Spoon_______Length and Diameter . Mof Coring Device 2/2_______________________________ Sampling interval 0.5-6.5___feet

Land-Surface Elev.__550_Jeet... Z Surveyed _3 Estimated Datum USGS________________Drilling Fluid Used NA_____________________________Drilling Method HSA__________DrillingContractor Samuel Stothoff___________________Driller Paul_____Helper Gary_____Prepared Hammer HammerBy _____John Mihalich_________________________Weight 140 Ibs.prnp 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or T! e a H -i n o-

Recovery Blows per 6From To (feet) inches Sample/Core Description

0.5

2.5

4.5

2.5

4.5

6.5

1.5

2.0

2.0

6/46/7 1 CLAY and SILT, trace reddish brown shalev

13/1522/22

8/1622/17

fragments. Brown, tight, dry.

CLAY, some silt, minor very fine sand,

trace red and yellow shaley fragments.

Reddish-brown, dry.

SILT and sand, very fine, trace clay.

minor red shalev fragments. Reddish-brown,

dry. Grey siltstone at bottom of spoon.


B=Background reading (0-0.1 ppm).••

G&M Form 03 6-86 Souttlpnnt 89-1257

, '& MILLER. INC.Environmental Service* .. . SAMPLE/CORE LOG

Rnnng/Well ™-6 Prnject/Na SEQUA / NY21202 _________________ Page 1 of. 1 / 1 5 / 9 0

ation Dublin. PA __________________ l l - j A M nnmpferi 12; 00 NOON ^Type of Sample/

Total Depth Driller) 5 . 0 feet Hole Diameter 6 inches Coring Device Split Spoon ______ _Length and Diameter nof Coring Device 2/2 ______________________________________ Sampling Interval 0.5-4.3 feet

Land-Surface Elev. 550 feet Z] Surveyed CS Estimated Datum USGS __________________Drilling Fluid Used NA______________________________________Drilling Method HSADrillingContractor Samuel Stothoff______________________Driller Paul_____Helper Gary______Prepared Hammer HammerBy _____John Mihalich__________________________Weight 140 Ibs.pr0p 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet betow land surface) Core Pressure or Reading

Recovery Blows per 6 , fFrom To (feet) inches Sample/Core Description (.PPm.>

0.5

2.5

2.5

4.5

1.75

1.75

7/10/18/1015/2751/53

CLAY, little silt. Reddish-brown, dry.

SILT and CLAY, some sand, very fine,

bedrock fragments. Bottom 1 foot is

grey to black weathered siltstone.

Bedrock in bottom of spoon.

Bottom of hole at 5 feet.

B=Background reading (0.2-0.3 ppm).*

HrtoOUb3i*

B

B

F~m OT fi.Bfi Soulhonnt 89-1257

•̂TGERAGHTY, '& MILLER. INC.Environmental Services SAMPLE/CORE LOG

BoringWell_JZWzZ__ Project/No. SEQUA / NY212Q2________________Page 1 nf 1Site Drilling 1/15/90 Dri||ingLocation Dublin, PA_________________ Started 1;20 pm____ Completed 2:00 pm

Type of Sample/Total Depth Drilled 6 • ° feet Hole Diameter 6 inches Coring Device Split Spoon________Length and Diameterof Coring Device 2' / 2________________________ Sampling Interval 0.5-5 .5___feet

Land-Surface Elev. 550 feet D Surveyed H Estimated Datum uses_________________Drilling Fluid Used NA____________________________Drilling Method__JIS_i_____DrillingContractor Samuel Stothoff__________________Driller Paul_____Helper GaryPrepared Hammer HammerBy _____John Mihalich______________________Weight 140 lbs.prop 30 inches


Recovery Blows per 6 BackgroundFrom To (feet) inches Sample/Core Description _Rp d '

0.5

2.5

4.5

2.5

4.5

5.5

1.75

2

2

6/1023/30

18/2936/26

8/1027/61 *

SILT and CLAY, some sand> f ine to coarse.

Reddish-brown. Grey siltstone appears to

be in bottom of spoon.

SILT and CLAY, some sand, fine to coarse.

Reddish-brown. 3" of bedrock in middle

of spoon.

Bedrock and clay. Some silt.

Bottom of hole at 6 feet.

B = Background reading (0.2-0.3 ppm).

@ Ŝ , /** ft £*e. /**• f»t t**

GSM Form 03 6-86 " ** *? W U Q «3 D Southoont 83-1257

GERAGHTY, '& MILLER. INC.Environmental Services SAMPLE/CORE LOG

Rnring/Well VW-8 Prnject/Nn. SEQUA / NY212Q2______________________Page 1 nf 1Site Drilling 1/15/90 Dri||jngLocation Dublin, PA________________________ Starter! 2;50 pm Completed 3:35 pm

Type of Sample/Total Depth Drilled 7 •5 feet Hole Diameter 6 inches Coring Device Split Spoon_______Length and Diameter , / „of Coring Device 2/2__________________________________ Sampling Interval 0-5-7.5_____feet

Land-Surface Flev 550 feet C Surveyed H Estimated Datum USGS______________Drilling Fluid Used NA__________________________Drilling Method HSADrillingContractor _______Samuel Stothoff________________Driller Paul______Helper GaryPrepared Hammer HammerBy ________John Mihalich________________________________Weight 140 Ibs. Drop 30 inches

Sample/Core Depth Time/Hydraulic HNuifeet below land surface) Core Pressure or p--,»•«««Recovery Blows per 6 Heading

From To (feet) inches Sample/Core Description (ppm)

0.5

2.5

4.5

2.5

4.5

6.5

2

1.5

1.5

6/1217/24 SILT and CLAY, trace very fine to very

26/1225/30

13/39io/62

coarse, angular erev and red bedrock

fragments. Reddish brown. Dry.

CLAY and SILT, trace fragments of

greenish-brown mudstone in bottom half of

spoon. Brown. Wet from water seeping into hole

along asphalt/soil surface.

CLAY and SILT, trace fragments of

greenish-brown mudstone.

Grey siltstone and red shale in bottom four

inches of spoon.


B = Background reading (0.2-0.3 ppm)

AJ?30Q83fi

B

GSM Form 03 6-86 SOUthpniK 8*1257

M& MILLER. INC.Environmental Services SAMPLE/CORE LOG

Boring/Well VW-9 Project/No SEQUA / NY21202__________________pagfi 1 of___L_Site _,. „, Drilling J'}5/90 Drilling 1/16/90Location Dublin. PA______________Started 4; 10 pm Completed 11:QO am

Type of Sample/Total Depth Drilled 7.5 feet Hole Diameter 6 inches Coring Device Split Spoon______Length and Diameterof Coring Device 2'/ 2"______:__________________ Sampling Interval 0.5-6.25 feet

Land-Surface Elev 550 feet D Surveyed S Estimated Datum USGS_____________

Drilling Fluid Used NA__________________________Drilling Method_JiSA.DrillingContractor ____ Samuel Stothoff _________________ Drnier Paul _____ Helper GaryPrepared Hammer HammerBy ________ John Mihalich ______________________ Weight 140 Ibs. Drop 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or

Recovery Blows per 6 ReadingFrom ___ To ___ (feet) ___ inches ____________________ ' Sample/Core Description __________________ (ppm)

B0.5

2.5

4.5

2.5

4.5

6.25

1

1

.8

2/54/58/1052/30

22/4650/100

CLAY and SILT. Brown. Wet (from surface).

CLAY and SILT. Brown. Reddish-brown

shale at bottom of spoon. Wet

CLAY, red shale in bottom of spoon.

Reddish-brown, Wet (from surface) .



GS.M form 03 6-86 Southptirt 89-1257

^GERAGHTY'& MILLER. INC.nvironmental Services SAMPLE/CORE LOG

Boring/WeL ±rIO__Project/No. SEQUA / NY21202_____________________Page 1 of 1Site Drilling 1/16/90 prilling.jocation 'ublin. PA__________________Started 11:35 am Completed 12:00 NOON

Type of Sample/Total Deptf . -iiled 7-5 feet Hole Diameter 6 inches Coring Device Split Spoon_______Length ana Diameterof Coring Device 2'/ 2"__________________________________ Sampling Interval 0-5 -6.5 feet

Land-Surface Elev. 550 feet n Surveyed E Estimated Datum nsfls________________

Drilling Fluid Used NA______________________________________Drilling MethnH HSADrillingContractor ____Samuel Stothoff________________Driller Paul______Helper GaryPrepared Hammer HammerBy ________John Mihalich______________________Weight 140 Ibs. Drop 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or •G^^Ai-r.r,Recovery Blows per 6 Reading

From To (feet) inches Sample/Core Description

0.5

2.5

4.5

2.5

4.5

6.5

2.0

1.0

1.0

5/57/11

16/2027/33

7/1427/30

CLAY, little silt. Pinkish-light brown.

Dry.

CLAY, little silt, trace coarse angular

fragments. Pinkish-light brown. Drv.

Red weathered siltstone in bottom of

spoon.

CLAY and SILT, little very coarse

angular green shale fragments. Brown.

Grevish-black siltstone in bottom of

spoon.

•



AR3Q0838Fnrm 03 6-86 Southpnm 89-1257

^GERAGHTY'& MILLER. INC.•nvironm.nial Services SAMPLE/CORE LOG

BoringAA/ell_WrlL__Project/No. SEQUA / NY21202_________________Page 1 nf 1lite Drilling 1/16/90 Drj||jngcation Dublin. PA________________Started 1:50 pm Completed 2:30 pm

Type of Sample/Total Depth Drilled 7.5 feet Hole Diameter 6 inches Coring Device Split Spoon_______Length and Diameterof Coring Device ____2'/ 2"______________________Sampling Interval 0.5 - 6.5 feet

Land-Surface Elev. 550 feet n Surveyed H Estimated Datum USGS_____________Drilling Fluid Used NA________________________Drilling Method HSADrillingContractor Samuel Stothoff________________Drii|er Paul_____Helper GaryPrepared Hammer HammerBy ________ John Mihalich ____________________ Weight 140 Ibs. prop 30 inches

Sample/Core Depth Time/Hydraulic HNueet below land surface) Core Pressure or


0.5

2.5

4.5

2.5

4.5

6.5

0.5

1.0

0.8

4/47/8

10/1620/23

16/4542/46

CLAY, some silt, trace siltstone and

shale fragments, angular, trace sand

very coarse, trace orange brick (fill). Brown.

CLAY, some silt, some siltstone and

shale fragments, angular, trace sand, very

coarse. Brown.

Brown, green, red siltstone and shale fragments.

Red siltstone, weathered, mixed with

reddish brown clay and silt. Siltstone

in bottom of spoon.

Bottom of hole at 7.5 feet.•*

B = Background reading (0.1-0.2 opm)

G&M Form 03 6-86 . ft 'I* *5 if U O & J Souttlpfint 83-1257

, & MILLER. INC.Environmental Services SAMPLE/CORE LOG

Rnnng/Well VW-12 Project/No. SEQUA / NY21202_____________________Page 1 of 1Site Drilling !/16/90 DrillingLocation Dublin, PA__________________Started 3:00 pm Completed 3:25 pm

"Vpe of Sample/ .Total Depth Drilled ° •u feet Hole Diameter__°____inches Coring Device Split Spoon_______Length and Diameter „of Coring Device ____2/2___________________________________________ Sampling Interval 1.0-5.0___feet

Land-Surface Flev. 550 feet Z Surveyed 29 Estimated Datum USGS______________________

Drilling Fluid Used NA__________________________________Drilling Method HSADrillingContractor Samuel Stothoff__________________________________Driller Paul_____Helper Gary_____Prepared Hammer HammerBy _____John Mihalich_________________________Weight 140 Ibs. Drop 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or _ , .

Recovery Blows per 6 ReadingFrom____To___(feet)____inches____________________ Sample/Core Description____________(ppm)

! 2/3 j1.0 3.0 2.0 i 2/4 !CLAY, little silt. Brown, becoming

3.0

i1

5.0 i 1.751

10/1625/29

1 1: |

'

1

reddish with depth. Dry.

CLAY, little silt, greenish-greyish-

black siltstone in very bottom of "

spoon. Red.


B=Background reading (0.2-0.3).

•

& MILLER INC•nviro.menta, Serves SAMPLE/CORE LOG

Ronng/Well VW-13 Pmjer.t/No SEQUA / NY21202________________Rage___1 nf 1

Bite n ui • UA DriHing 12/21/89 Drillingocation Dublxn, PA__________________ started 4:08 pm Completed 5:20 pmType of Sample/

Total Depth Drilled 8.5 feet. Hole Diameter 6 inches Coring Device Split Spoon_______Length and Diameterof Coring Device ______ 2*/2"_________________Sampling Interval 1.0 - 9.0 feet

Land-Surface Elev. 550 feet n Surveyed [̂ Estimated Datum____USGS__________Drilling Fluid Used _______^_____________________Drilling Method HSA

CoSctor _______ Samuel Stothoff _____________ Driller Paul HelperPrepared _ , *..,,., Hammer 1/n ,,Hamnner ~,nBy __________ John Mihalich _________________ Wejgnt 140 lbs^mp __30_jnches

Sample/Core Depth Time/Hydraulic °- u(feet below land surface) Core Pressure or Reading


1.0 3.0 1 1.75

1.0

5.0

7.0

5.0

7.0

2.0

0j

9.0 1.8

4/33/4

8/1718/21

9/1322/30

CLAY, little silt. Pinkish light brown

(1.25 - 1.50). Medium brown (1.0 - 1.25): Dark

brown staining (1.50 - 1.75).

CLAY (3.0 - 3.2), little silt. Dark brown.

CLAY, little silt, reddish-brown with

trace angular green and red siltstone and

shale fragments (3.2 - 5.0).

No recovery.5/16 |28/36 ! CLAY, trace silt, red and gray siltstone

1i in bottom 1 ft. of snoon.

Bottom of hole at 8,5 feet.

B = Background reading.. (0.2 ppm).

_ _, tn. f-, f\ n 1 . 1JHiOUU-0'H »,

c.—— m K.BC Southpnnt 89-1257

•̂TGERAGHTY,

^GERAGHTY'& MILLER. INC.'nvironmental Services SAMPLE/CORE LOG

Boring/Well__VW=15_project/No. SEQUA / NY21202_______________Page 1 of 1iSite Drilling l/17/9° DrillingLocation Dublin, PA_______________________ Started 11:00 am Completed 12:00 NOON

Type of Sample/Total Depth Drilled / • 5 fast Hole Diameter__2___inches Coring Device Split Spoon______Length and Diameter , , „of Coring Device 2/2___________________________________ Sampling Interval 0-5-7.5______feet

Land-Surface Elev. 550 fê t D Surveyed 2 Estimated Datum USGS__________________Drilling Fluid Used NA____________________________Drilling Method HSA

Contractor Samuel Stothoff ___________________ Driller Paul ______ Helper GaryPrepared . , Hammer , HammerBy ____ John Mihalich ________________________ Weight 140 lbs.prnp __30_jnches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or Reading


0.5

2.5

4.5

2.5

4.5

6.5

1.0

1.8

1.75

3/33/3

3/711/14

15/1921/22

CLAY, little silt. Brown. Dry.

Red siltstone fragments in shoe.

CLAY, little silt, trace sand, very fine

to medium, some sand, very coarse

to gravel, fine. Brown, becoming reddish

with depth. Dry.

Sand, very coarse, angular and gravel,

fine , angular (weathered yellow and

reddish-brown siltstone) and

reddish brown-clay, trace very

fine to medium. Brown siltstone in

bottom of spoon."*


B = Background reading (0.2 ppm).

§;;DOAAOK 0

1.2

Top7.2Mid.1.2

Bot.0.4

Southprinl 89-1257

^GERAGHTYMILLER. INC.

Environmental Servucs SAMPLE/CORE LOG

Bor,ng/Well__YW-16_Pro,ect/No. SEQUA / NY21202 ________________ page ___ l_QfSite ... _. Drilling 1/17/90 DrillingLocation _______ Dublin, FA _____________ Started i;pn pm Completed 2:00 pm

f. f Sample/

, & MILLER. INC.Environmental Services SAMPLE/CORE LOG

Rnring/Well VW-17 project/No. SEQUA / NY21202__________________Page 1 of 1Site Drilling 1/17/90 Dri||ingLocation Dublin, PA_________________Started 2;40 pm Completed 3;00 pm

Type of Sample/Total Depth Drilled 7.5 feet Hole Diameter 6 inches Coring Device Split Spoon________Length and Diameterof Coring Device 2/2________________________Sampling Interval 0.5-7.5 feet

Land-Surface Elev. 550 feet a Surveyed 3 Estimated Datum USGS_____________

Drilling Fluid Used NA_________________________Drilling Method HSA ______DrillingContractor Samuel Stothoff________=__________Driller Paul______Helper GaryPrepared Hammer HammerBy ______John Mihalich________________________Weight 140 Ibs.Drop 30 inches


Recovery Blows per 6 ReadingFrom To (feet) inches Sample/Core Description , ,(ppm)

0.5

2.5

4.5

2.5

4.5

6.5

1.8

2.0

2.0

3/33/4

5/610/13

10/1727/28

CLAY, trace silt. Brown. Trace sand, very coarse.

Angular. Red and green.

CLAY, trace silt. Reddish-brown. Trace sand,

very coarse. Angular. Red and green.

CLAY, trace silt. Reddish-brown. Trace sand,

very coarse. Angular. Red and green.

Siltstone in bottom of spoon. Red and greenish grey.


B = Background reading (0.2 ppm).

*

• P>*5 AflOJ. CH if* «CJ W U •**•••* W

Southpiint 89-1257

. & MILLER. INC.Environmental Services SAMPLE/CORE LOG

Boring/Well_VWr18_project/No. SEQUA / NY21202_______________Page___L_of___L__Site Drilling 1/17/90 Dri||ingLocation Dublin, PA___________________ Started 3;4̂ ĵ Completed 5:00 pm

!,„-, ot Sample/Total Depth Drilled 7.0 feet Hole Diameter 6 inches Coring Device Split Spoon______Length and Diameterof Coring Device 2'/ 2"_______________________Sampling Interval 2.0-6.0____feet

Land-Surface Elev._I50___feet n Surveyed 3 Estimated Datum USGS_________________

Drilling Fluid Used NA__________________________Drilling Methnri HSADrillingContractor Samuel Stothoff_________________Driller___l5El____Helper GaryPrepared Hammer HammerBy ______John Mihalich______________________________Weight 140 Ibs. Drop 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet betow land surface) Core Pressure or RoaH-frierRecovery Blows per 6 Reading

From To (feet) inches Sample/Core Description (ppm)

2.0

U

4.0

6.0

1.75

1.25

8/1422/23

7/1536/36

CLAY, little silt and gravel. Red

shale and greenish-grey weathered siltstone

in bottom of spoon. Reddish-brown. Dry.

CLAY, little silt and gravel. Red

shale and greenish-grey weathered siltstone

in bottom of spoon. Reddish-brown. Dry.

Red siltstone in bottom 3 inches.


B=Background reading (0.2 ppm).

*

————————————— fl83008*t ————Southpnnt 89-1257

>iTGERAGHTY, '& MILLER. INC.Environmental Services SAMPLE/CORE LOG

Rnring/Well VW-19 Project/No. SEQUA / NY21202__________________Page 1 nf 1Site Drilling 1/18/90 Dri||ingLocation Dublin, PA_________________Started 9;20 am____Completed 10:00 am

Type of Sample/Total Depth Drilled 5.0 feet Hole Diameter 6 inches Coring Device Split Spoon_______Length and Diameterof Coring Device 2'/ 2"______________________Sampling Interval 0-5-4.5____feet

Land-Surface Elev. 550 feet D Surveyed K Estimated Datum USGS______________

Drilling Fluid Used NA_________________________Drilling Method HSADrillingContractor Samuel Stothoff ______________Driller Paul_____Helper Gary_______Prepared Hammer HammerBy ______John Mihalich________________________Weight 140 lbs.Drnp 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or


0.5

2.5

2.5

4.5

2.0

1.75

3/89/14

15/2226/31

CLAY, little silt, some red and yellow

angular sand, very coarse and gravel, fine.

Reddish-brown (dark brown at very top of

spoon) . Dry.

CLAY, little silt, some red and yellow

angular sand, very coarse and gravel, fine.

Reddish-brown. Drv. Fractured red siltstone in

bottom half of spoon.


B=Background reading (0.2 ppm).•*

ft&3atif&7G&M Form 03 6-86 Southprinl 89-1257

^GERAGHTY/& MILLER. INC.^Environmental Services SAMPLE/CORE LOG

Bormg/Well_J^20__ Project/No. SEQUA / NY21202________________Page__i__of_J__Site Drilling !/l8/90 DrillingLocation Dublin, PA_________________ started 10:20 am Completed 10:55 am

Type of Sampi?Total Depth Drilled 5.5 feet Hole Diameter 6 inches Coring Device Split Spoon_________Length and Diameter t I(of Coring Device 2/2____________________________ Sampling Interval 1.0-5.0____feet

Land-Surface Elev. 550 feet D Surveyed 3 Estimated Datum USGS______________

Drilling Fluid Used NA__________________________Drilling Method HSADrillingContractor Samuel Stothoff___________________Driller Paul_____Helper GaryPrepared Hammer HammerBy ______John Mihalich _______________________Weight 140 Ibs. Drop 30 inches

Sample/Core Depth Time/Hydraulic HNu(feet below land surface) Core Pressure or -a j •

Recovery Blows per 6 ReadingFrom To (feet) inches__________ Sample/Core Description __ (ppm)

1.0

3.0

3.0

5.0

1.0

2.0

4/35/65/610/18

CLAY, little silt. Brown. Dry.

CLAY, trace silt, trace angular red

bedrock fragments. Brown becomes

pinkish-grey and greenish-grey with

depth. Red siltstone in bottom of spoon.

Bottom of hole at 5. feet.

B=Background reading (0 . 2 ppm) .

*

AtaonaLft

B

0.3

Southprmt 8S-1257

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MEMORANDUM

To: Robert Saar and Barbara Dolce

From: John Burke / V

Date: Januarys, 1990

Subject: Soil Vapor Monitoring at Sequa Site, Dublin, Pennsylvania, December 27, 1989(Project No. NY21202)

The initial sampling and analysis of vapor wells VW-1 through VW-5 were conducted on

December 27, 1989. Sampling personnel included John Mihalich and myself. The wells were

purged with an ETA model S-12 sampling pump.

A Photovac 10S50 portable gas chromatograph (GC) was used to determine the presence

or absence of volatile organic compounds in the vapor samples. After studying laboratory results

from soil samples collected in the area, the portable GC was calibrated with the following

compounds: vinyl chloride, trans-l,2-dichloroethylene, trichloroethylene, and toluene.

METHODOLOGY

The GC was calibrated by injecting 500 microliters (ul) of vapor standards five times. A

separate vapor standard was analyzed for each of the following compounds: vinyl chloride, trans-•

1,2-dichloroethylene, trichloroethylene, and toluene. The concentrations of each standard were

10 parts per million (ppm), 2 ppm, 11 ppm and 5 ppm, respectively. The trans-1,2-

Afi30Q850

2

dichloroethylene and toluene standards were prepared by injecting headspace from a neat solution

of each compound into a 1 liter (L) Tedlar bag filled with ultra zero air. The 10 ppm standard of

vinyl chloride was prepared by Scott Specialty gases and is stored in a gas cylinder. The 11 ppm

standard of trichloroethylene was purchased from Alphagaz and is also stored in a gas cylinder.

Vinyl chloride and trichloroethylene standards were transferred to Tedlar bags for analysis. An

average response factor was calculated by dividing the standard concentration by the average peak

area from the five analyses. Syringe blanks were run to determine if there were any carry-over

effects from sample to sample. Standards were run once on the sampling day for each compound

to verify retention times and peak areas.

1/8" I.D. polyethylene tubing was inserted through a hole in a number 2 neoprene rubber

stopper. The length from the end of the tubing to the bottom of the stopper was measured to allow

the polyethylene tubing end to be aligned with the screened interval in each vapor well. 1/8" O.D.

Teflon tubing was then attached to the 1/8" I.D. tubing. A stainless steel tee with a septum was

attached to the center of the Teflon tubing. A sampling assembly as described above was

constructed and labelled for each of the vapor wells.

A pumping time study was conducted at Well VW-2. Samples were collected and injected

into the GC at two minute, three minute, four minute, and five minute pumping intervals. A

stable reading was obtained for the three, four, and five minute samples. A pumping time of four

minutes was decided upon for each of the remaining wells.

3

Well VW-2 was analyzed twice. The well was allowed to stand, capped, for approximately

two hours between the initial and duplicate samplings. No compounds were present in Well VW-

1. This may be due to the water column.

RESULTS

Results can be found on Table 1. Copies of all chromatograms are attached as Appendix

A. Results from Wells VW-2 and VW-3 indicated the presence of vinyl chloride and toluene and

Well VW-4 also indicated the presence of toluene. The results from Well VW-5 indicated the

presence of trichloroethylene.

Vapor well VW-1 contained a water column which completely covered the well screen. The

end of the sampling tube for Well VW-1 was placed approximately one foot above the water

column. No compounds were present in Well VW-1. This may be due to the water column

preventing any vapors from reaching the well.

JB:jhAttachment

A8300852

Table 1. Approximate Concentrations of Volatile Organic Compounds (VOCs) in the Vapor Wellsat the Sequa

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