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SUPERIOR ANALYTICAL LABORATORY, INC <br /> 1385 FAIRFAX ST, STE D • SAN FRANCISCO, CA 94124 • PHONE (415) 647-2081 <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. : 51447 DATE RECEIVED 12/08/89 <br /> CLIENT: Leedshil l - Herkenhoff , Inc. DATE REPORTED- 12/18/89 <br /> CLIENT JOB NO. . 9832. 12 ' <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> by Modified EPA SW-846 Method 8015 <br /> LAB Concentration (mg/kg ) <br /> # Sample Identification Gasoline Range Diesel Range <br /> ----- -----------�---------- --------------- ------------ <br /> 7 C1 ND<10 ND< 10 <br /> 8 C2 ND< 10 ND< 10 <br /> 9 C3 ND<1O ND< 10 <br /> Minimum Detection Limit for Gasoline and Diesel in Soil 10mg/kq <br /> ' QAQC Summary <br /> Daily Standard run at 200mg/L RPD Gasoline = < 15% <br /> RPD Diesel = <30% RSD <br /> MS/MSD Average Recovery = 74% Duplicate RPD = 7% <br /> Richard Srna, Ph D. <br /> Laboratory Dirfor <br /> OWSTAND111lG QUALITYAND SERVICE <br />