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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone 12091 384 2930 <br /> Certificate #2079 Fax 12091 384-1507 <br />' Advanced GeoEnvironmental, Inc Client Project ID Nomelhnt Construction Sampled 8-12-97 <br /> of Northern California Reference Number 1228 Received 8-13-97 <br /> 1803 West March Lane, Suite A Sample Description Water Extracted 8-14-97 <br />' Stockton, CA 95207 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 8-14-97 <br /> Attn Tim Cuellar Lab Numbers 1228-6W, 7W 8W, 9W Reported 8-22-97 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-618-12 97 MW-7/8-12-97 MW 818-12-97 MW-918 12-97 <br /> lug/L1 (ug/LI (ug/L) (ug/L) (ug/L) <br />' MTBE 050 ND ND ND ND <br /> BENZENE 050 ND 160 ND ND <br /> TOLUENE 050 ND 36 ND ND <br /> ETHYL BENZENE 050 ND 45 ND ND <br /> TOTAL XYLENES 050 ND 110 ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 100 2000 ND ND <br /> IReport Limit Multiplication Factor 1 10 1 1 <br /> I <br /> I <br /> Surrogate % Recovery ND 10096!PIC 10096 rib 122%iPio 112% FID 105%1 PID 105% FID 101961PID 101% <br /> I Instrument ID VAR GCI VAR-GC1 VAR-GC1 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 Multiplication Factor <br /> I <br /> ANALYST APPROVED BY <br /> C n J -Cone ia�px C Phillips <br /> vrronmental tab Director <br /> I <br />