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CHROMALAB, INC. submission #: 1999-06-0442 <br /> ` Environmental Services(SDB) <br /> " To Wright EnvironnIfttal Services Inc Test Method: 8020 'w <br /> 8015N-F <br /> . Attn Mana Reid Prep Method 5030 <br /> Batch QC Report <br /> Gas/BTEX <br /> Laboratory Control Spore (LCS/LCSD) Water QC Batch # 1999107106-01.05 <br /> LCS 1999/06-01 05-002 Extracted 07106/1999 08 20 Analyzed 07/0671999 08 20 <br /> LCSD 1999107/06-01 05-003 Extracted 07/06/1999 09 24 Analyzed 07/06/1999 09 24 <br /> Compound Canc ( ug/L j Exp Conc ( ug/L] Recovery(% RPC Ctri Limits (%] I Flags <br /> LCS <br /> LCSD LCS LCSD LCSLCSD Recovery RPD LCS LCSD <br /> Gasoline 433 453 500 5o0 865 906 45 75-125 20 <br /> Benzene 85 7 846 1000 1000 a5 7 846 13 77-123 20 <br /> Toluene IV 87 9 1000 1000 891 87 9 14 78-122 -V <br /> EUV benzene 88 0 919 1000 1000 88 0 91 9 4 3 70-130 20 <br /> Xylene(s) 263 273 300 300 877 91 0 3 7 75-125 20 <br /> Surrogates) <br /> Tnfluerotoluene 490 472 500 500 980 944 58-124 <br /> 4-8rornofluorobenzene-F9 328 332 50o 500 656 66 4 50-150 <br /> ZZ <br /> 1220 Quarry LanePleasanton,CA 94566-4756 <br /> Telephone (925)4841919-Fa=mde (925)484-1 W6 <br /> Printed on 07/081199915'36 Page 15 of 16 <br />