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r BH-2 Nan-detectable contamination to 31' deep BH-3 Non-detectable contamination to 11' deep Hole terminated at 11 ' deep No C.C.L. levels of contamination ir. 3H-1, as recommended in LUFT at Table 2-1, are exceeded that except thef cr C toluene c.390 PPMO toluenePPM s isat ppM, it shoald be n xylene 35' deep and exce ds above ther Cu C L nd a e .1.0 nPPMeandn is h at f28 only tydeep at 3.25 PPM and 55 feet above ground water . Using The U.S. Weather Service was contaactlr nrainfall.little less 13" per th-to-g the Stockton Station, rainfall avatar of 83 '-38'=43' , LUFT tables year. Using a dep 2-5, 2-6, 2-7, and 2-8 recommend that an acceptable cumulative soil contamination level for protection of ground water is as follows: Acceptable Limits (PPM) per LUFT. Table 2-5, 2-6, 2--7 & 2-8 Tabu-2 Acceptable Maximum Existing Acceptable Limit (PPM) Limit -(PPM) Limit (PPM) 0.3 .059 BH-1 @ 35 Benzene 9 .390 BH-1 @ 35' Toluene 600 0.3 1.0 3.25 Tank Hole @ 28' 1000 Xylene 1.0 .20 BH-1 @ 35' E-Benzene 1000 These results indictate that the potential to contaminate ground water is very slight to none. The remaining contamination at the site, after excavat4on, a significant environmental hazard to the does not appear to pose area, in that. far f 1, There are major ground water . wells used only i N industrial production of aggregate located between the contaminated site andthe sradius saf� T nd 2000 GPM wells would probably influence of gradient is northwesterlyintercept the 500 GPM agreatly diluted any possible contamination at a g concentration. nd ve 2. The soil considerably f rom levels samples below a t e$tanks to a28 decline declined 3 feet deep. TPH at bottom OfBen2 k ( 5,00039 MpPdeclined to to 10 PPM @ 28 feet deep. less than one PPM, Xylene (480 . PPM) declined to 3.25 j ppM, and Ethyl Benzene (93 PPM) declined to .200 QPM- -7-