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TRC-Alton Geosclence, Inc <br /> Dual-Phase Extraction Test Report Summary Sheet <br /> Event# b <br /> Quik Stop Market No 121 <br /> 1I96 West Louis Avenue AQMD9 NA <br /> Manteca,California NPDES✓A NA <br /> DUAL-PHASE EXTRACTION PERFORMANCE <br /> Date(s)of Events) 817103 <br /> Total operating Hours 800 <br /> Technology Used High-vacuum Irgntd-ring pump with Thermal Oxidizer <br /> Extraction Well with Max/Mm Vapor Concentration(ppmv) 12,260 12,280 <br /> MaxfMin Flaw Rate for Extraction Well(cfin) 186190 <br /> Max/Mut Vacuum for Recovery£xttacuoo Well 15-5/75 <br /> Total Recovery Volume(pounds/gallons)by Vapor 17.3512 77 <br /> LABORATORY ANALYSIS OF VAPOR SAMPLES <br /> Sample Result(ug/L) <br /> Well Time <br /> ID Date Sampled TPH •• Benzrna• Toluene* Ethyl Benzene* Total Xylenes* MTBE <br /> RW 1 MW 3 18-Sep 01 6 30 AM 150 000 1100 110 N D190 NA <br /> RW-1 MW-3 I8-Sep-0 l 9 30 AM 9 700 360 71 8 170 NA <br /> RW-1 MW-3 I8-Se 01 1 00 PM 6 600 230 47 6 160 NA <br /> i <br /> ADDITIONAL INFORMATION <br /> = Analyzed by EPA Method 8020 <br /> ••=Analyzed by EPA Method 8015 <br /> uglL =micrograms per liter <br /> cfin =cubtc feet per minute <br /> in Hg =inches of mercury <br /> TPH g =total petroleum hydrocarbons as gasoline <br /> MTBE -Methyl ten Buryl Ether <br /> ND =not detectable <br /> NA -not analyzed <br /> Prepared by / Mark Trevor Staff Geologist TRC Project No 41-U319.01 <br /> �y <br /> Approved by c G'lsaay L Walker R_G Associate Submittal Date 17-Oct-0 I <br /> TRC <br /> Cusnuner-Focused Solunons <br />