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I <br /> I <br /> -. SUPERIOR ANALYTICAL LABORATORIES, INC. <br /> 825 ARNOLD,STE. 114• MARTINEZ,CALIFORNIA 94553•(415) 229-1512 DOHS (1319 <br /> C E R T I F I C A T E O F A N A L Y S I S OOHS #220 <br /> -LABORATORY NO. : 81171 DATE RECEIVED: 07/13/90 <br /> ; ,CLIENT: Alton Geoscience DATE REPORTED: 07/21/90 <br /> CLIENT JOB NO. : 30-140 <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 5030 and 8015 <br /> LAB Concentration (mg/L) <br /> - Sample Identification Gasoline Range <br /> -- --------------------- <br /> 1 MW-2W 0.08 <br /> 2 MW-4W 3. 1 <br /> 3 MW-5W 4.4 <br /> 4 MW-6W 14 <br /> 5 MW-7W tv1)(0.05 <br /> 6 MW-8W 11 <br /> 7 P-1W 0.07 <br /> 8 P-2W ND<0.05 <br /> mg/L - parts per million (ppm) <br /> Method Detection Limit for Gasoline in Water: 0.05 mg/L <br /> 3 F.; <br /> OAOC Summary: <br /> Daily Standard run at 2mg/L: RPD Gasoline = 15% <br /> MS/MSD Average Recovery = 107%: Duplicate RPD = 7% <br /> i <br /> "i <br /> `Richar Srna, Ph.D. <br /> Laboratory Manager <br /> d <br /> OUTSTANDING QUALITY AND SERVICE <br />