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r .. <br /> .rte <br /> I <br /> RW <br /> goo <br /> i� <br /> PRE-TANK REPLACEMENT 9LTE ASSESSMENT <br /> j L Irl, RESULTS REPORT <br /> 1603 S.Ei 4uatlo,StaCktan,Cal#omla <br /> Papa S <br /> 1 1 <br /> FDetection limits were as follows; <br /> .+ a) for TPPH, as gasoline, the detection limit is 0.1 mg/kg <br /> (Ppm) ; <br /> b) for BTX&E the detection limits are 0.001 mg/kg (ppm) ; <br /> C) for EDC and EDB the detection limits are 0.001 mg/kg <br /> (ppm) : and <br /> f d) for total lead the detection limit is 2. mg/kg (Ppm) - <br /> run <br /> in addition, a spike peak, surrogate sample and a oda he ana3yses <br /> to ensure quality assurance/quality control (QA/QC) <br /> Per . <br /> Aegis' SOP, Appendix C. <br /> ! Detectable concentrations of total purgeable petroleum hydrocarbons <br /> were found in some of the samples. retrieved <br /> from beneath the UST <br /> } basin. A `.single; . high',concentration'.of 16,000 mg/kg" (piss)'. was <br /> observed.in SB-�1' approximately 35"feet below grade.:. This 'sampling <br /> .., location was approxi;oately beneath the central tank in the UST <br /> ' -� basin. A duplicate ; analysis of this sample indicated a <br /> 1-:``� concentration of"',14,000 mg/kg (ppm) The remainder of the TPPH <br /> m and were <br /> concentrations ranged fmg/kg (Pp <br /> my,'0.19.:to 0.8 .).', <br /> „ observed in samples collected from depths ranging from <br /> approximately 18 to 30 vertical feet below grade. Relatively low <br /> „ lens and/or. 1,2- <br /> concentrations of benzene, toluene, Xy <br /> { <br /> dichloroethane were observed in a31 of the samples analyzed. <br /> � Ethylene:dibromide-;was'not detected in:any`af_the:samples analyzed.- <br /> he results`of the laboratory analyses are summarized in Table 2. <br /> iN 34 asOUnd Water Cgnditione <br /> W <br /> A saturated water horizon was encountered at depths 49 and ly. <br /> vertical feet below. grade in borings Ss-1 and es encounter <br /> { � Based on field observations and the soil typ <br /> ground water is inferred to be under unconfined conditions. <br /> yond the scope of this <br /> Assessment of ground water quality is be <br /> phase of investigation. <br /> Fis <br /> is <br /> VAR <br /> ds 9 L <br /> 90-2056.RPT <br /> } <br /> i� <br />