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16 <br /> SUPERIOR ANALYTICAL LABORATORY, INC <br /> 1385 FAIRFAX ST, STE D • SAN FRANCISCO, CA 94124 • PHONE (415) 647-208 , 9 <br /> F <br /> C E R T I F I C A T E O F A N A L Y S I S Hyo <br /> LABORATORY NO. : 51388 DATE RECEIVED: 11 /21 /89 <br /> CLIENT: Leedshill - Herkenhoff , Inc. DATE REPORTED: 11 /29/89 <br /> CLIENT JOB NO. : 9832 . 12 <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 5030 and 8015 <br /> LAB Concentration (mg/kg ) <br /> -#-- Sample-Identification Gasoline Range <br /> 3 MW5-10 -`------------ <br /> ND< 1 <br /> 5 MW5-20 ND< 1 <br /> 7 MWS-30 ND< 1 <br /> 9 MW5-40 ND< 1 <br /> 11 MW5-50 ND< 1 <br /> 12 MW5-55 ND< 1 <br /> mg/kg - parts per million (ppm) <br /> Minimum Detection Limit for Gasoline in Soil lmg/kg <br /> AAQC Summary: <br /> Daily Standard run at 2mg/L . RPD Gasoline = < 15% <br /> MS/MSD Average Recovery = 93%: Duplicate RPD = 15% <br /> Richard Srna. Ph .D. <br /> Laboratory DTrec r <br /> i OUTSTANDING QUALITY AND SERVICE <br />