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819 SInkcr AAcnu,,Suite 8 <br /> Sequoia Stcranianto CA 95834 <br /> Analytical I Av <br /> a— ) (916) <br /> 916921 921 9600 <br /> nn w,equatzl tb,com <br /> URS-Sac Gateway Oak% Prajact ARCO 434, Lodi,CA <br /> 2870 Gateway Oaks Dr,Ste 300 Prcj4ct Number 434, Lodi,CA ReportLd <br /> Sacramento CA,95833 P[nject Manager Vernon Elarth 07/08/02 16 02 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT-Quahty Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spike Source %RI( RPD <br /> Analyte Result Limit Umts level Result %REC Limits RPD Limit Note, <br /> Batch 2070027-EPA 50308 P/T <br /> Blank(2070027-BLKI) Prepared&Anal zed 06/28/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Surrogate a a a-Trrfluorotoluene 110 10 0 110 60-140 <br /> LCS(2070027-BSI) - Prepared&Analyzed 06/28/02 <br /> Benzene l0 8 050 ugA 10 0 108 70 130 <br /> Toluene 11 1 0 50 10 0 1 1 1 70 130 <br /> Ethylbenzene 11 5 050 too 115 70-130 <br /> Xylenes(total) 32 9 0 50 30 0 110 70-130 <br /> Surrogate a a a-Tri luorotoluenc 11 7 100 117 60 140 <br /> *---atrix S ike 2070_027-MS1) .source 5206336-03 Prepared&Analyzed 06/28/02 _ - <br /> Benzene 10 3 0 50 u8/1 10 0 ND 103 60-140 <br /> Toluene 10 8 050 10 0 ND 108 60-140 <br /> Ethylbenzene 11 0 0 50 10 0 ND 110 60 140 <br /> Xylenes(total) 31 6 0 50 30 0 ND 105 60-140 <br /> Surrogate a a a-Trrfluorotoluene 11 1 10 0 111 60-140 <br /> Matrix Spike Dui(2070027-AISDI) _ Source 5206336-03 Prepared R Analyzed 06/28/02 <br /> Benzene 11 0 050 ug/I t0 0 ND 110 60-140 7 25 <br /> Toluene 11 3 0 50 10 0 ND 113 60 140 5 25 <br /> Ethylbenzene 11 5 0 SO 10 0 ND 115 60 140 4 25 <br /> Xylenes(total) 33 2 0 50 30 0 ND 111 60 140 5 25 <br /> Surrogate a a a-Trrfluorotoluene 11 6 10 0 116 60 140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the san[ples analyzed in accordant e itch[he churn <br /> of cu stod) document This analt heal r epoi t must be t ept oduccd in rtt emit try <br /> Page Page,6 of 10 <br />