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SDMS Document Harding Lawson Associates V '^'^5546 June 28, 1996 35241.5 Ms. Sherrel Henry United States Environmental Protection Agency Region II Emergency and Remedial Response Division 290 Broadway New York, New York 10007-1866 Soil Sampling Program - AST Area Phase II Remedial Investigation Virgin Island Chemical Site St. Croix, U.S. Virgin Islands Dear Ms. Hemy: The purpose of this letter is to confirm a May 30, 1996 telephone conversation between Mr. Edward Nemecek of Harding Lawson Associates (HLA) and Mr. Mel Hauptman of the U.S. Environmental Protection Agency (EPA) regarding the scope of field work for this project. Based on problems encountered with sample shipment (described below) and conditions encountered in the field, the following changes have been made to the scope of work: On May 22, 1996, HLA collected surface soil samples from locations SBB2 through SBBI3 (Figure I), according to procedures described in HLA's May 15, 1996 letter and the EPA-approved Sampling and Analysis Plan (HLA, 1994). HLA shipped these samples via Federal Express to PACE Laboratory (PACE) in Louisiana on the same day. Although the appropriate permits and paperwork were in place, these samples were held by U.S. Customs in Tennessee. These samples were not released from U.S. Customs in time to be loaded on to the Federal Express plane leaving for Louisiana. The samples were not delivered to PACE until May 24, 1996. Upon receipt, the laboratory measured the sample temperatures at greater than 22 Centigrade (°C). In conformance with the Sampling and Analysis Plan, these samples were not analyzed. In response, HLA collected a second surface sample within 2 feet of borings SBB4, SBB6, and SBBl 1 (renamed SBB4A, SBB6A, SBBl 1 A, respectively) and also collected surface samples at borings SBB16 and SBBl7 (Figure I). These 5 surface samples were submitted to Pace for TCL VOC analysis prior to the May 30, 1996 telephone conversation between Mr. Hauptman of EPA and Mr. Nemecek of HLA (discussed below). On May 24, 1996, HLA collected subsurface soil samples from locations SBB4 , SBB6, and SBBl 1, according to procedures described in HLA's May 15 letter and the EPA-approved SAP. HLA shipped these samples via Federal Express to PACE on the same day. Although the appropriate permits and paperwork were in place, these samples were held by U.S. Customs in Tennessee. These samples were not released from U.S. Customs in time to be loaded on to the Federal Express plane leaving for Louisinana. Due to the Memorial Day Holiday weekend, the samples were not delivered to PACE until May 28, 1996. Upon receipt, the laboratory measured the sample temperatures at greater than 23 Centigrade (°C). In accordance with the Sampling and Analysis Plan, these samples were not analyzed. In response, HLA advanced another boring adjacent to the affected borings and collect soil samples from the same depths that the original samples were collected. These samples arrived at PACE on June I, 1996. Upon receipt, the laboratory measured the sample temperatures at 1°C. These samples are currently being analyzed along with the other soil boring samples. On May 30, 1996, Mr. Nemecek of HLA contacted Mr. Hauptman of EPA to inform him that resampling of the surface soil in the AST area did not appear to be warranted, based on soil photoionization detector Engineering and Washington Park, 14 Wasliington Road, Princeton Junction. NJ 08550 609/936-0700 Fax 609/936-1020 Environmental Services ..i suh^idiury o/Himiin.s,-vv.iy.r/u.v,v • ofiiti:-..Xmiim.iJ,- 300859 Harding Lawson Associates Ms. Sherrel Henry USEPA-Region II Change in Scope Letter 6/28/96 (PID) measurements (zero at all surface locations except 5.7 ppm at SBBl 1 and 0.6 ppm at SBB4A) and field observations (no staining or odors) of soil samples collected from the 0 - 2 ft bgs interval. Mr. Nemecek also pointed out that HLA had installed and sampled seven soil borings (one more than proposed in HLA's May 15, 1996 letter), and that data from these borings were adequate to evaluate the vertical and lateral extent of VOCs in soil within the AST area. Mr. Hauptman agreed with the cancellation of resampling of all surface soil samples. HLA notes that the 5 surface soil samples (3 resampled locations, 2 new locations) shipped to the laboratory prior to the May 30 conversation have been analyzed for TCL VOCs. If you have any questions regarding this, or any other project matter, please do not hesitate to contact either of the undersigned. Yours very truly, HARDING LAWSON ArSSOCIATES S. Virgie, P.G. Senior Geobgjst idward A. Nemecek, R.G., C.P.G. Principal Hydrogeologist Enclosure: Figure 1 JSV/EAN/jsv G\WORK\3524l\WP\EPASCOPE.DOC cc: Lori G. Singer, Esq., Sills, Cummis, Zuckerman, Radin, Tischman, Epstein & Gross Ms. Pamela J. Philip, CDM Federal Programs Corp. 300860 SBB9- SBB12Z.MWr6_ ^ S B B I O SBBl 4 I 1— in 1 I— 00 I SBB11 o T snn2 seno A <$) SBBl/MW-1 A SBB3 ^SBB13 ^ ^ (S> SBB6 SBBl 2 ^ SBB7 , SBB4 ^SBB5 ( ^ ^SBB16 EARTHEN BERM (^SBBIb WALL 20 40 60 FT. FOR ILLUSTRATION PURPOSES ONLY (ZZ) C D LJ rn K l I ^1 L J L 21 I ^1 I I r y i n I ^1 I I H KO 00 O o m ABOVEGROUND TANK FARM LEQENQ SURFACE SOIL SAMPLING LOCATION SURFACE SOIL AND SOIL BORING LOCATIONS SOIL BORING/ MONITORING WELL LOCATION EXISTING ABOVEGROUND STORAGE TANK TANK PAD-FORMER ABOVEGROUND STORAGE TANK LOCATION RAMP SOURCE! PROPOSED ICC SOIL SAMPLING LOCATIONS OY ENVlRO-SCIENCES. INC. OAltO: 6 / 1 9 / U 5 ANI) S i l t MAP, VI CHEMICAL. S I . CROIX. O S V L BY NUS CORPOHAIION nOCDMENI 0 2 - 9 1 0 1 - 0 1 - b l . UNOAIED Harding Lawson Associates Engineering nnd Envifonmenlol Services M \ North Third Street Philodelphio. PA 19106 2 1 5 - 6 2 7 - 4 5 0 5 SURFACE SOIL SAMPLE SOIL BORING LOCATIONS AST AREA ISUND CHEMICAL COMPANY ST. CROIX. U.S. VIRGIN ISLANDS FIGURE DRAWN WGA JOB NUMBER 352-11.6 APPROVED DRAWING NUMBER 3524^01 DAIE 6 / H / 9 6 REVISED- OATE #