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mAY 2 0 1991 <br /> SUPERIOR ANALYTICAL LABORATORIES,INC 29 1512 DOHS #319 <br /> 87ARNOLD,STS. 114 • MARTINEZ, CALIFORNIA 94553 ( ) DOHS #220 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO. : 83059 DATE RECEIVED: 05/08/91 <br /> -' <br /> DATE REPORTED: 05/15/91 <br /> CLIENT: Alton Geoscience <br /> CLIENT JOB NO. : 30-136-01 <br /> - ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 8015 <br /> Concentration (mg/L) <br /> LABDiesel Range <br /> n Sample Identification ---------------------- <br /> -- <br /> - ND<0.05 <br /> 1 AW-1 ND<0.05 <br /> 2 AW-2 ND<0.05 <br /> 3 AW-3 ND<0.05 <br /> 4 AW-4 ND<0.05 <br /> 5 AW-5 ND<0.05 <br /> 6 AW-6 ND<0.05 <br /> 7 AW-7 ND<0.05 <br /> 8 AW-8 <br /> mg/L - Parts per million (ppm) <br /> Method Detectior Limit for Diesel in Water: 0.05 m9/L <br /> 4 QAQC Summary: <br /> Daily Standard run at 200mg/L: RPD PD Gasoline - Na <br /> MS/MSD Average Recovery = 0 <br /> 98%: Duplicate RPD - <br /> Richard Srna, Ph.D. <br /> L borato y anag <br /> OUTSTANDING QUALITY AND SERVICE <br />