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TRC-Alton Geosclence, Inc <br /> Dual-Phase Extraction Test Report Summary Sheet <br /> Event# 7 <br /> Quik Stop Market No 121 <br /> 1196 West Louis Avenue AQMt)4 NA <br /> Manteca,California NPDES# NA <br /> DUAL-PHASE EXTRACTION PERFORMANCE <br /> Dates)of Event(s) 10117/01 <br /> Total Operating Hours Soo <br /> Technology Used High vacuum liquid-nng pump with Thermal Oxidizer <br /> max/min Influent Vapor Concentration(ppmv) 13,02013,020 <br /> Max1Mm Influent flow]tate Win) 46132 <br /> Maximm Influent Vacuum(inches of water) 226121 2 <br /> Total Recovery Volume(pounds/gallons)by Vapor 25 1714 02 <br /> LABORATORY ANALYSIS OF VAPOR SAMPLES <br /> Sample Result(uglL) <br /> Well Time <br /> ID Date Sampled TPH •• Benzene* Toluene* Ethyl Be=nc* Total X lents• MTBE <br /> RW 1 MW-3 17 Oct-01 6 15 AM 24 000 340 39 ND 140 NA <br /> RW-1 MW-3 17 Oct-01 945 AM 8 700 ND 38 ND ILO NA <br /> RW L MW-3 17 Oct 01 1 15 PM 5 300 25 D ND ND 27 NA <br /> ADDITIONAL INFORMATION <br /> •= Analyzed by EPA Method SD20 <br /> '•=Analyzed by EPA Method 8015 <br /> uglL =micrograms per liter <br /> cfm =cubic feet per minute <br /> in Hg =inches of mercury <br /> TPH g =total petroleum hydrocarbons as gasoline <br /> MTBE -Methyl cert Buryl Ether <br /> ND =not detectable <br /> NA -not analyzed <br /> Prepared b3r �'`Maark Trevor Staff Geologist TRC Project No 41-0319-02 <br /> Approved by N ry L Walker R.G Associate Submittal Date 5-Nov-01 <br /> TRC <br /> Customer focused Solutions <br />