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' Superior precision Inc. <br /> aL{ �rr)old Lrye Suite 1-1 ' Viar-,ne' C?lIfcrr is 151Oi 512 ic,X 151 01 22c' , 52 - <br /> C <br /> 2 -C E R T I F T- C A T E O F A N L Y S I S <br /> LABORATORY NO . 83915 DATE RECEIVED 09/13/91 <br /> CLIENT Harding Lawson Associates , Concord DATE REPORTED . 09/20/91 <br /> CLIENT JOB NO . . 17060 , 025 03 DATE SAMPLED 09/12/91 <br /> ' ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by MODIFIED EPA SW-8.18 METHOD 5030 and 8015 <br /> LAB Concentration ( mg/L ) <br /> T Sample identification Gasoline Range <br /> 1 MW-1 0 34 <br /> 2 Mw-2 ND<O 05 <br /> 3 MW-3 ND<0 . 05 <br /> ' 4 MW-4 ND<O 05 <br /> 5 MW-5 ND<0 . 05 <br /> 6 MW-6 ND<0 . 05 <br /> ' 7 MW-8 1 4 <br /> 8 MW-9 37 <br /> 9 MW-10 78 <br /> 10 MW-11 ND<0 . 05 <br /> 11 MW-12 ND<0 . 05 <br /> 12 MW-13 ND<0 . 05 <br /> ' 13 MW--14 ND<0 . 05 <br /> 14 MW-15 ND<0 . 05 <br /> mg/L - parts per million ( ppm) <br /> Method Detection Limit for Gasoline in Water 0 05 mg/L <br /> QAQC Summary <br /> ' Daily Standard run at 2mg/L RPD Gasoline = <15 <br /> MS/MSD Average Recovery = 107% Duplicate RPD = 2 <br /> 1 <br /> Richard Srna, Ph. D. <br /> /4�L4� <br /> Laboratory Director <br /> ' Cerffied Laboratories <br />