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SITE BACKGROU"ND ' Rl() (.'jjlil'0rjlKj, CXCi1VatCd Mid rC1ll0VC(. three ()n (ktoticr 30. 1991, W.urcii F. (jorics Fxcavatlilu. Inc.. ()f I 1;'S"I's 0 K1. 1'K2 mid 'I'1l",30 from the site. File US'FS C011t,1111Cd ",lSOI1nC '111(1 diesel fuel. A Condor rcprc,,etl1ati\e ��as on site during, the USW I' rcinmal to collect ,oil samples. "I'lic neld activities were observed by Carol ()z of the P]IYEI ID. A small hole was found on the lower fill end of 'FK3 (diesel tank). PetroICUrn staillim-7 and odors were noted in the soil bencath the former locations of the USTs. Groundwater was not encountered during (lie I.,'S_I_ removal. Six soil samples were collected by Condor from the UST excavation at depths ot") to 12 feet helm% the -round surface Hic samples were analvzed tier I-PI I-G Omsoline). BTEX. TFPH (diesel), 1:D13 (ethylene dibromide). and total lead. Laboratory analyses indicated elevated concentrations of 'I_PI I-(I. 'FF])11. and 131EXCOFIStItUCIVS ill 111e Sod SjjjljP1CS. 1 o additional Information, refer to ['tink Pull 7'L,swj.,,, Ile srrlr.c. prepared hN Condor. datcd Nw.ember I S. 1x)91. At the direction of the PIIS/FIID. Condor prepared a �wrk plan to investigate the gasoline and diesel contamination associate(I t�itll the lbrilier I1 S'r.,. (.Ywl it)ul(;re)wit h i werh/ it/.mt Work Plim, dated May 30. 1()1)5). "Hie %%ork p1mi %gas appro�cd by the PHS 1:1 ID and the Reclamation District ;CO29. 011 ALI,,ust 2-2. 199 . three liNdropurich liorchoics ( I IP- I. I IP-2. and HP-3) %Ncrc drilled at the site (,sec the fil g u re attached to the back of Appendix ti for borehole locations). Ronald Rowc of the [11-1131:11L) was on site periodical]),- to obser\c the ficid\%ork. (;filbert Cosio of Burns, and Kicnien Fngincering \%as on site to i representative. 'F\%o of the hydropunch boreholes (HP-1 obscrvc the drillim-, actl\ities as a Reclamation District representative. and HP-2) were located on the levee and were drilled to depths of approximately 16 and I I feet belov,, the top of the levee (btl), respectively. The third hydropunch borehole (HP-1) was located below the levee and was drilled to a depth of approxiin atelv 6 feet beIL)NV ground surface (bgs). Soil samples were collected at five foot intervals. Groundwater samples were collected using a I+,droPL11lCIl 11 groundwater sampler. Gasoline odors were noted in each borehole. Laborator% analyses Indicated concentrations of T-PI[-G and BTEX in the soil and Groundwater Samples arial',zed I-rom each borehole (see "Fables B.1 and 13.2, on the next page).