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' SIERRA LABORATORIES INC <br /> r <br /> • <br /> GHH Engineers, Inc Date Sampled 1/22/98 <br /> 8084 Old Auburn Road, Suite E Date Received 1/24/98 <br />' Citrus Hieghts,CA 95610 Date Prepared 1126198 <br /> Date Analyzed 1/26/98 <br /> Sierra Project No 9801-180 Analyst SM <br />' Client Project ID 5007 101USA-STOCKTON <br /> Sample Matrix Water Report Date 1/28/98 <br />' EPA METHOD 8020-BTEX/EPA METHOD 8015-Gasoline Range Hydrocarbons(C4-C12) <br /> (Purge& Trap) <br />' Concentration,µg11 <br /> Method <br /> Client Sample No • MW4P MW-6P MW-31? MW-1 MW-2P MW-1P MW-2 Detection <br /> Limit, <br /> Sierra Sample No • 865 866 867 868 869 870 871 Li <br /> COMPOUNDS <br />' Benzene ND ND ND 23 310* 2 2 ND 05 <br /> Toluene ND ND 5 1 13 19 13 5 1 0 5 <br />' lbenzene ND ND ND 087 5I 051 ND 0 5 <br /> otal Xylenes ND ND ND 1 8 49 092 ND 0 5 <br /> r <br /> Gasoline ND ND 170 1100 2500 ND 140 50 <br /> 1 <br /> Dilution Factor 1 1 1 1 1,l0* I QC Limits <br /> %Surrogate Recovery <br /> 4-Bromofluorobenzen 94 97 91 120 105 100 105 70-125 <br />' Quality Assurance/Quality Control Data <br /> QC Sample ID• 9801-173-BL <br /> LCS Spike Spike Dup QC QC <br /> Compounds % Rec % Rec %Ree Limits RPD Limits <br /> Benzene 100 93 94 39-150 1 1 0-30 <br /> Toluene 102 I00 102 46-148 2 0 0-30 <br /> Ethylbenzene 102 100 100 32-160 0 0 0-30 <br />' Gasoline 109 107 J 106 50-150 0 9 0-30 <br /> ND means Not Detected <br /> Wing Limit(RL)=Method Detection Limit(MDL)x Dilution Factor <br /> r <br /> r <br />