5~71 £3"DVNAMACCORPORATION

Dynarrac CorporationPublic Ledger Building6th and Chestnut StreetsSuite 872Philadelphia, PA 19106

Telephone: 215-440-7340Fax: 215-440-7346

November 6, 1989

Mr . Michael TowleRemedial Project ManagerEnvironmental Protection AgencyHazardous Waste Enforcement Branch841 Chestnut BuildingPhiladelphia, PA 19107

;Subject: CryoChem RI/FS Oversight

Contract No. 68-W9-0005 (TES VIII)Work Assignment No. C03023

Dear Mr. Towle:

Dynamac is submitting for your records, two copies of a letterreport, concerning the oversight of residential well sampling atthe CryoChem Site. This Split Sampling Letter Report was providedby PRC, Inc. , subcontractor to Dynamac Corp. on Contract No. 68-W9-0005 (TES VIII) .

This submittal is in partial fulfillment of the Field OversightTask in Work Assignment No . C03023 . The delay in submitting thereport is a result of the delay in Work Plan approval andnotification from EPA Headquarters.

If you have any questions, please call me at (215) 440-7343.

Sincerely,

Bruce BeachProject Manager

cc: Elaine Spiewak, EPA Regional Contract OfficerJohn Lindsay, Dynamac TES Regional Manager

Corporate Headquarters: The Dynamac Building, 11140 Rockville Pike, Rockviile, Maryland 20852 A R 3 0 I 5 (l

PRC Environmental Management, Inc. Planning Research Corporation303 East VVacker DriveSuite 500Chicago. IL 60601312-856-8700FAX# 938-0118

September 13, 1989

Mr. Michael TowleU.S. EPA Region 3841 Chestnut Street6th FloorPhiladelphia, PA 19107

Re: TES VIII Work Assignment No. C03023Oversight and Split Sampling Letter Report

Dear Mr. Towle:

PRC Environmental Management, Inc. (PRC) recently conducted residential and monitoringwell ground-water split sampling activities during Phase 2 of the CryoChem remedial investigationand feasibility study (RI/FS). PRC also oversaw the activities of JACA, contractor to the potentiallyresponsible party. These activities were conducted under Work Assignment No. C03023 of U.S. EPAContract No. 68-W8-0005 (TES VIII).

JACA conducted the sampling activities on August 16, 17, and 18. PRC personnel werepresent on August 16 and 17. On these two days, the following personnel were present:

Jeff Ross PRC August 16 and 17Deb Harrity PRC ; August 16 and 17Jean Martino JACA August 16 and 17Rich Ponak JACA August 16 and 17Linda Shade JACA August 16Doug Whitten JACA August 17

On August 16 and 17, JACA sampled 15 residential wells, four shallow monitoring wells, andthree deep monitoring wells. PRC personnel observed the sampling of seven residential wells andthe seven monitoring wells. PRC received three residential well ground-water split samples, threemonitoring well ground-water split samples, one duplicate sample, and one field blank. PRC alsoprepared two trip blanks. The samples were analyzed for volatile organic compounds. AttachmentA presents the split sample numbers, locations, and parameters to be analyzed for. All samples werecollected on August 16 and 17 and sent each day to the following Contract Laboratory Program(CLP) laboratory, under CLP Case No. 12545.

EA Engineering Science and Technology15 Loveton CircleSparks, MD 21152

Mr. Michael TowleSeptember 13, 1989Page 2

Copies of the traffic reports, chain-of-custody records, and the CRL sample shipping log areincluded as Attachment B to this letter. Attachment C contains a figure showing residential well splitsampling locations (Figure 1) and a figure showing monitoring well split sample locations (Figure 2).

PRC adhered to its split sampling QAPP, with the following deviations:

• PRC neglected to collect a duplicate sample from the residential wells.

A split sample from RI-8 could not be taken, since the water quality of RI-8 was very poor (high silt content due to low water level). A split sample wastaken instead at RI-1-shallow. Of the three remaining downgradient shallowwells to be sampled by JACA (RI-1, RI-4, and RI-5), RI-1 was the only wellwith a ground-water level sufficient for sampling.

PRC made the following observations concerning JACA's sampling activities, includingproblems encountered and deviations from the Sampling and Analysis Plan (SAP).

RESIDENTIAL WELL SAMPLING

The residential wells were purged by attaching a garden hose to the spigot and allowing thewater to flow for 20 minutes. The hose was removed prior to sampling and the flow of water wasreduced to prevent volatilization. Samples were collected directly from the spigot.

Problems Encountered

JACA personnel were aware that the Kountry Kitchen restaurant (P.O. Box266, and JACA No. Ill) installed a chlorine treatment system in July 1989,but did not know if the sample collected from the outside spigot bypassed thetreatment system. PRC did not observe the collection of this sample.

A sample was taken from P.O. Box 68 (JACA No. 107) without knowingwhether there was a carbon filter system.

Deviations from SAP

• JACA only collected one duplicate sample at P.O. Box 267 (JACA No. 114).According to the SAP, two duplicate samples should have been collected.

• The rate of flow was not measured. The purpose of measuring the rate offlow is to ensure that any water in the holding tank is purged prior tosampling.

MONITORING WELL SAMPLING

The monitoring wells were purged using submersible pumps. The pumps were flushed withclean water for about 5 minutes between wells. A minimum of three well volumes were removedfrom each well except from those that were pumped dry. Purge water from the wells that were

Mr. Michael TowleSeptember 13, 1989Page 3

found to be previously contaminated was collected in holding tanks or drums and will be handledappropriately based on the results of laboratory analyses. The purge water from the uncontaminatedwells was discharged onto the ground.

The wells were sampled using a stainless steel bailer. Samples were collected from the middleof the screened interval or from the yield zone in deep bedrock wells. Between each well, the bailerswere decontaminated using an alconox wash, an acetone rinse, and a distilled water rinse.

Problems Encountered

JACA personnel encountered several problems with the shallow monitoringwells. RI-8 and RI-4 went dry after approximately 1/2-gallon was purged;RI-5 went dry after approximately 7 gallons; and RI-6 only containedapproximately 3 inches of water in the bottom of the well. Therefore, JACAdid not samaple RI-6, and planned to sample RI-4 on August 18.

JACA personnel found RI-5-deep to be no longer artesian, and removed thevalve assembly. The water level was approximately 2 feet below the groundsurface. JACA purged the well at 5 gpm for 90 minutes.

Deviations from SAP

• The pH and specific conductivity were not measured during purging. JACAstated that visual observation of water quality would be used to determine ifgreater than three well volumes needed to be purged. In addition, pH, specificconductivity, and temperature were not recorded at the time of sampling.

• Since RI-2 was found to be slightly contaminated, the purge water should havebeen stored in individually labeled storage tanks. However, JACA personneldischarged purge water from RI-2 onto the ground for about 1 1 minutes (50gallons). The remainder of the purge water was containerized in 55-gallondrums.

If you have any questions or comments concerning this letter, please call me or Jeff Ross at312/856-8700.

Sincerely,

Deborah A. Harrity, PRC

DAH/klb

AR30I550

ATTACHMENT A

SPLIT SAMPLING SUMMARY

PRCSamgle No. Sample Type Parameters Location Comments

CCRW01-02 Trip Blank VOAs

CCRW02-02 Residential VOAs P.O. Box 71 (104)Well-

Ground water

CCRW03-02 Residential VOAs P.O. Box 114 (116)Well -

Ground water

CCRW04-02 Residential VOAs P.O. Box 115 (112)Well-

G round water

CCMW01-02 Monitoring VOAs RI-1 -ShallowWell -

Ground water

CCMW02-02 Monitoring VOAsWell -

Trip blank

CCMW03-02 Monitoring VOAs RI-2-DeepWell-

Ground water

CCMW04-02 Monitoring VOAs RI-2-Deep DuplicateWell -

Ground water

CCMW-05-02 Monitoring VOAsWell -

Rinsate blank

CCMW06-02 Monitoring VOAs RI-1-Deep Extra volumeWell - collected for

Ground water MS/MSD

Note: The location number in parentheses is JACA's.

fiR30!55

ATTACHMENT B

TRAFFIC REPORTS, CHAIN-OF-CUSTODY RECORDS,AND THE CRL SAMPLE SHIPPING LOG

AR3G1552

USEPA CONTRACT LABORATORY PROGRAMSAMPLE MANAGEMENT OFFICEP.O. BOX 818 ALEXANDRIA, VA 22313703/557-2490 FTS-557-2490

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TYPE OF ACTIVITY (CIRCLE QfijE) 0SUPERFUND— PA SI ESIF^RD RA ER

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SR30I558

FIGURE 1

RESIDENTIAL WELL SPLIT SAMPLING LOCATIONS

* hvntoiaan Report. NUS, 1065.

RI-6 • OFF-SITE MONITOR WELLS

A RESIDENTIAL WELL SPLIT-SAMPLE LOCATIONS

Source: Modified from Roy F. Weston, Inc., 1987, Final RI/FS Work Plan for theCryoChem site.

flR30!559

FIGURE 2

MONITORING WELL SPLIT SAMPLING LOCATIONS

floule 562PI , Phase 2 NuitoSc*t*

Mom i or Well

9 Split-sample Location

Source: Modified from Roy F. Weston, Inc., 1987, Final RI/FS Work Plan for theCryoChem site.

AR30I560