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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209) 384-2930 <br />' Certificate#1-2480 Fax (209)384-1507 <br /> Advanced GeoEnvrronmental, Inc Client Project ID Top Filling Sampled 10-30-01 <br /> of Northern California Reference Number 4187 Received 11-2-01 <br /> 837 Shaw Road Sample Description Water Extracted 11-5-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 11-5-01 <br /> Attn Tom Cuellar Lab Numbers 4187-IW 2W, 3W 4W, 5W Reported 11-15-01 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> I ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW6B MW6C MW6D MW6E MW7B <br /> 103001 103001 103001 103001 103101 <br /> (ug/L) (ug/L) (ug/L) (uglL) (ug/L) (ug1L) <br /> MTBE 050 130 ND ND ND ND <br /> BENZENE 050 2200 220 13 78 38000 <br /> TOLUENE 050 1100 330 11 10 37000 <br /> • ETHYL BENZENE 050 160 170 34 23 2600 <br /> iTOTAL XYLENES 050 680 940 25 10 12000 <br /> I GASOLINE RANGE <br /> HYDROCARBONS 50 7900 5800 190 90 160000 <br /> Report Limit Muft:plication Factor 100 20 1 1 1000 <br /> I <br /> Surrogate% Recovery FID 966567 PID 949% FID 112%fPID 105% FID 109%/PID 113% FID 996%lP1D 101% FID 997%/F'10 979% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GCI VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit= Reporting Limit x Report Limit Multiplicabon Factor <br /> I ANALYST APPROVED BY -, <br /> C!a Cane Ja C Phrllrps <br /> boratofy Director <br />