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t <br /> SUPERIOR ANALYTICAL LABORATORY, INC <br /> 1555 BURKE UNIT I SAN FRANCISCO CA 94124 • PNO�'E (415) 647 2081 DOHS #1332 <br /> C E R T I F I C A T E O F A N A `' I <br /> LABORATORY NO 53071 DATE RECEIVED 07/ 12/91 <br /> CLIENT DAMES & MOORE DATE REPORTED - 07/20/91 <br /> CLIENT JOB NO 012 <br /> ANALYSIS FORTOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW--846 Method 5015 <br /> Concentration ( mg/k9 ) <br /> LAB- ------------- -- Diesel---------- <br /> � Sample Identification ----------- <br /> 1 TRENCH- 1 ND< 10 <br /> ND< 10 <br /> 2 TRENCH-2 ND< 10 <br /> TRENCH-3 ND< 10 <br /> 4 ISLAND- 1 ND< 10 <br /> 5 ISLAND-2 ND< 10 <br /> 6 ISLAND-3 ND< 10 <br /> 7 ISLAND-4 <br /> Minimum Detection Limit for Diesel in Soil 10mg/G.9 <br /> OAOC Cummary <br /> Daily Standard run at 200mg/L %Diff Diesel = 1/ 15 <br /> MS/MSD Average Recovery = 104% Duplicate RPD = 1 % <br /> Richa d S n Ph 0 <br /> Laboratory Dir ctor <br /> r <br /> OUTSTANDING QUALITY AND SERVICE <br />