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SIERRA LABORATORIES INC <br /> [rG—HHEngineers, Inc Date Sampled 1/2I/99 <br /> 084 OldAuburn Road, Suite E Date Received 1/27/99 <br /> itrus Hieghts, CA 95610 Date Prepared- 1/27/99 <br /> Date Analyzed. 1127199 <br /> Sierra Project No 9901-403 Analyst SM <br /> Client Project ID 5007 10/USA Stockton <br /> Sample Matrix Water Report Date 1/29/99 ' <br /> EPA METHOD 8020-BTEX/EPA METHOD 8015-G2soline Range Hydrocarbons(C4-C12) <br /> (Purge&Trap) <br /> Concentration;ug/IT <br /> ' <br /> Client Sample No MW-6P MW-4P MW-3P MW-1 MW-2P MW-1P IvtW-2 MW-SP Method <br /> Detection <br /> Sierra Sample No 1793 1794 1795 1796 1797 1798 1799 1800 Limit, <br /> u�L <br /> COMPOUNDS <br /> Benzene ND ND ND ND 18 ND ND ND <br /> ND ND ND 6 2 7 ND 0 5 <br /> Toluene 3 ND ND <br /> Ethylbenzene ND ND ND ND 0 5 ' <br /> ND ND ND ND OS <br /> Total Xylenes ND ND ND 064 1 2 ND ND ND <br /> MTBE ND ND ND 300 ND ND ND 0 5 <br /> N1 s a <br /> Gasoline ND ND 420 400 390 ND ND ND <br /> 50 <br /> Dilution Factor <br /> %Surrogate Recovery QC Limits <br /> 4-Bromofluorobenzene 100 100 110 I05 94 100 99 90 <br /> 70-125 <br /> Quality Assurance/Quality Control Data <br /> QC Sample 1D 9901-403-1794 ' <br /> LCS Sp <br /> ike <br /> Compounds % Rec fij�-6- <br /> __!Il_ Spike <br /> QC QC <br /> Limits <br /> Benzene 89 RPD Limits <br /> 39-150 17 0-30 <br /> Toluene 93 46-148Ethylbenzene 13 0-30 <br /> 96 32-160 I O 0-30Gssoitnc 50-150 <br /> _8 3_ —0-30 J- <br />- -ND mans Not D,te`cted -- -- - `- <br /> Rt,portin,Limit(RL)=Method DLtechon Limit(MDL)x Dilution Tactor <br />