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SIERRA LABORATORIES INC <br /> The Park Corporation Date Sampled: 12/19/96 <br /> 8084 OId Auburn Road Date Received. 12/24/96 <br /> Citrus heights, CA 95610 Date Prepared: 12/26/96 , <br /> Date Analyzed. 12/26/96 <br /> Sierra Project No : 9612-221 Analyst- SM <br /> Client Protect ID: 5023-J1/Diamond Lumber Manteca ' <br /> Sample Matrix, Water Report Date: 1/2197 <br /> EPA METHOD 8020-BTEX/ <br /> EPA METHOD 8015 MODIFIED-GASOLINE RANGE HYDROCARBONS(C4-C12) <br /> (PURGE AND TRAP) i <br /> Concentration, pV1 <br /> Method <br /> Client Sample No.: SRK-MW-1 SRK-MW-2 SRK-MW-3 BEI-MW-1 Detection <br /> Limit, <br /> Sierra Sample No.: 21929 2I930 21931 21932 pg/l <br /> COMPOUNDS: <br /> Benzene ND 70 ND 330 05 <br /> Toluene ND 10 ND ND 05 ' <br /> Ethylbenzene ND 34 ND 400 05 <br /> Total Xylenes ND 89 ND 650 05 <br /> i <br /> Gasoline Range ND 1900 ND 7800 50 <br /> Dilution Factor 1 5 1 25 QC Limits ' <br /> % Surrogate Recovery; <br /> 4-Bromofiuorobenzene 87 110 97 96 70.125 <br /> Quality Assurance/Quality Control Data <br /> QC Sample ID: 9612-221-2.1937 <br /> LCS Spike Spike Dup QC QC <br /> Compounds % Rec % Rec %Rec lUrnitsIRPI) Limits <br /> Benzene 94 93 95 39-150 16 0-30 <br /> Toluene 98 95 97 46-148 13 0-30 <br /> Ethylbenzene 100 98 99 32-160 10 0-30 <br /> Gasoline 96 85 90 50-150 57 0-30 <br /> ND means Not Detected <br /> Reporting Limit(RL)=Method Detection Lima(MDL)x Dilution Factor <br />