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Sequoia 885 Jarvis Drive <br /> Morgan Hill CA 95037 <br /> 41) (408) 776-9600 <br /> Analytical FAX (408) 782 6308 <br /> ATC Associates Inc - Modesto Project Stockton Fire Station m2 Sampled 12/14/99 <br /> l 1 I7 Lone Palm Avenue Project Number #5462574 0001 Received 12/17/99 <br /> Modesto CA 95351-1502 Project Manager Jeanne HomseN Reported 1/14/00 <br /> Total Purgeable Hydrocarbons (C6-C12),BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Morgan Hill <br /> Date Spike Sample QC Reporting Limit Recov RPO RPD <br /> Analyte Analvzed Level Result Result Units Recov Limits % Limit 9'a Notes* <br /> Batch 9120741 Date Prepared 12/23/99 Extraction Method EPA 50306 PIT <br /> Blank 9120741-BLK1 <br /> Purgeable Hvdrocarbons 12/23/99 ND ug/1 Soo <br /> Benzene ND 0 500 <br /> Toluene ND <br /> 0500 <br /> Ethvlbenzene ND 0 500 <br /> Xvienes(total) ND 0 500 <br /> Methvl tert-butvl ether _ _ ND _ " _ 250 <br /> Surrogate a a a-Trifluorotoluene " 100 940 700-130 94 0 <br /> LCS 9I20741-BSl <br /> Purgeable Hvdrocarbons 12/23/99 250 214 uell 700-130 85 6 <br /> Surrogate a a a-Trrfluorotoluene " 100 _ 10 9 700-130 109O <br /> rix Spike 9120741-MSI M912656-02 <br /> Purgeable Hvdrocarbons 12/23/99 250 ND___ 263_ uE/1 60 0-440 I05 <br /> Surrogate a a a-Trrfluorotoluene 11100 11 6 700-130 116 <br /> Matrix Spike DUP 9120741-MSDI M912656-02 <br /> Purgeable Hydrocarbons 12/23/99 250 ND 235 ug/1 600-140 94 0 25 0 11 1 <br /> Surrogate a s a-Trifluorotoluene 11100 T 11 7 11700-130 117 -- <br /> Batch 9120742 Date Prepared 12/23/99 Extraction ,Method EPA 5030B PIT <br /> Blank 9120742-BLKI <br /> Purgeable Hydrocarbons 12/23/99 ND ug/l 500 <br /> Benzene ND 0 500 <br /> Toluene ND 0 500 <br /> Ethylbenzene ND <br /> 0 500 <br /> Xvlenes(totai) ND 0 500 <br /> Nlethvl tert-butyl ether _ ND " 2 50 <br /> Surrogate a a a-Tr flrrorotoluene ]0 0 9 44 700-130 94 4 <br /> LCS 9120742-BSI <br /> Purgeable Hydrocarbons 12/23/99 250 _ 227 u&1 700-130 90 8 <br /> Surrogate a a a-Trrfluorotoluene 100 996 "-- 700-130 996 <br /> Matrix <br /> 96Matrix Spike 9120742-N(Sl M912656-03 <br /> Purgeable Hydrocarbons 12/23/99 250 ND 228 UFA 600-140 912 _ <br /> Surrogate a a a-Trifluorotoluene 11 100 10 6 700-130 106 <br /> ` rix Spike DuR 9120742-,MSDI N1912656-03 <br /> ..able Hydrocarbons 12/23/99 250 ND 232 ug/1 600-140 92 8 25 0 1 74 <br /> Sequoia Analytical-,Nforgan Hilt *Refer to end of report for tent of notes and definitions <br /> AM Page 5 of 9 <br />