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S CASTLE ANALYTICAL LABORATORY <br />! Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Project ID Top Filling Sampled 03-04-03 <br />! of Northern California Reference Number 5521 Received 03-05-03 <br /> 837 Shaw Road Sample Description Water Extracted 03-05-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 03-05-03 <br /> Attn Tim Cuellar Lab Numbers 5521-11 W, 12W, 13W, 14W, 15W Reported 03-1 M3 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />! WITH BTEX DISTINCTION <br />! ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 7A MW 7B MW 7C MW 7D MW 7E <br /> 030403 030403 030403 030403 030403 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND ND <br /> I BENZENE 050 14000 44000 160 230 210 <br /> TOLUENE 050 15000 43000 380 400 300 <br /> •1 ETHYLBENZENE 050 1000 3000 30 33 27 <br /> TOTAL_XYLENES 060 4500 13000 110 120 100 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 80000 160000 1500 1600 1200 <br />' Report Limit Multiplication Factor 1000 1000 10 10 5 <br /> Surrogate%Recovery FID 108%IPID 109% RD 115%IPID 113% FED 107%/PID 106% FID 113%JPiD 112% FID 112%1P1D 112% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit= Re orting Limit x port Limit Multiplication Factor <br /> r <br /> ANALYST APPROVED BY <br /> Clan J Cone Ja rllrps <br /> oratory arrector <br />