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15102291526 SUPERIOR MARTINEZ 325 P03 DEC 22 '92 11:21 <br /> Superior precision Ana v ca , Inc_ j <br /> 825 Arnold Drive, Suite 114 ■ Martinez, California 94553 a (510) 229-1512/fax)510) 229-1526 <br /> f, <br />�. i <br /> C E R T I F I C A T E O F ANALYSIS <br /> F <br /> LABORATORY NO. : 87418 DATE RECEIVED: 12/14/92 <br /> CLIENT: Decon Environmental Services DATE REPORTED: 12/21/92 <br /> CLIENT JOB NO. : STOCKTON STEEL DATE SAMPLED : 12/11/92 <br /> ANALYSIS FOR TOTAL PETROLEUM HYDROCARBONS <br /> a <br /> by MODIFIED EPA SW-845 METHOD 5030 and 8015 y <br /> LAB Concentration (mg/kg) <br /> # . Sample Identification Gasoline Range <br /> 1 SP-1, -2 ND<1 <br /> 2 SP-31 -4 ND<1 <br /> 3 SP-5, -5 ND41 <br /> 4 SP-7, -8 ND<1 <br /> 5 SP-9 ND<1 <br /> mg/kg - parts per million (ppm) <br /> Method Detection Limit for Gasoline in Soil: 1 mg/kg <br /> QAQC Summary: <br /> Daily Standard run at 2mg/L: RPD Gasoline = <15 <br /> MS/MSD Average Recovery = 91 k Duplicate RPD = 3 <br /> Richard Srna, Ph.D. <br /> Labor ory Dire r, <br /> Certified laboratories <br /> G <br /> r <br /> ) <br />