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f <br /> I <br /> ,I <br /> 500 Hospital Road <br /> page 3 I <br /> ;i <br /> i� All SBs were nondetect for BTEX, TPH purgeable, and TPH <br /> jextractable at detection limits of 0.003 ppm, 1.0 ppm, <br /> and 10. 0 ppm, respectively, except for the 6.0' - 6.5' <br /> , sample from SB B#4, which showed TPH extractable at <br /> { 11, 000 ppm. <br /> 12-30-93 Site visit this date for the over-excavation of the <br /> ijimpacted soil. The area around SB B14 was excavated to <br /> a depth of approx. 12 ' BGS. The inspector noted that <br /> although there was visible staining on the foundation'of <br /> the building, the soil in the excavation appeared to be <br /> ' clean with no odors and no visible staining. Five soil <br /> samples were taken, four from each sidewall at approx. 7 ' <br /> i. <br /> -8 ' BGS, and one from the bottom at approx. il' -12 ' BGS. <br /> 1994 <br /> 02-11-94 1! PHS/EHD receives "Soil Excavation and Assessment Report". <br /> The analytical results from the over-excavation showed <br /> ii all four sidewall samples to be nondetect for TPH <br /> " extractable at a detection limit of, 10.0 ppm. The bottom <br /> sample showed TPH extractable at 51. ppm. <br /> Sam leSample Sle sample . PID TPH <br /> p <br /> amp. <br /> I;ocation ID Number Date Depth Readiu�g Result <br /> pPmv mg/kTI: g <br /> Excavation Bottom 80814 12/30/93 11' 0 51 <br /> North sidewall 80815 12/30/93 8' 0 ND <br /> South' sidewall 80816 12/30/93 8' 0 ND <br /> West'sidewall 80817 12/30/93 7' 0 ND <br /> East sidewall 80818 12/30/93 80 ND <br /> SEocitpHe 80819 12/30/93 Surface 2 51 <br /> 1 <br />