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C H RO MA LAB, INC. Submission # 1999-08-0176 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Ian T Reed Prep Method 5030 <br /> Batch QC Report <br /> Volatile Organic Compounds <br /> Laboratory Control Spike (LCS/LCSD) Water QC Batch# 1999108120-01 27 <br /> LCS 1999108120-01 27-002 Extracted 08/20/1999 12 30 Analyzed 08/20/1999 12 30 <br /> LCSD 1999108120-01 27-003 Extracted 08/20/1999 13 20 Analyzed 08/20/1999 13 20 <br /> Compound Conc [ug/L] Exp Conc [ug/L] !Recovery[%] LAPD I Ctrl Limits [%] i Flags <br /> LCS LCSD LCS LCSD LCS LCSD _T <br /> [%) Recovery IRPD LCS LCSD l <br /> Benzene 432 455 500 50 0 864 91 0 5 2 69-129 1 20 I <br /> Chlorobenzene 55 3 5,30 501 500 1106 1060 4 2 61-121 20 <br /> 1 1-Dichloroethene 379378 i 500 500 758 756 0 3 65-125 20 <br /> Toluene 433 449 500 500 866 898 3 6 70-130 20 <br /> Trichloroethene 424 437 500 I 500 848 874 3 0 74-134 20 <br /> Surrogate(s) <br /> 4-Sromolluorobenzene 521 i 542 500 500 1042 1084 $6-115 � <br /> 1,2-Dichloroethane-d4 409 1 428 500 500 818 856 76-114 <br /> Toluene-d8 l 457 1 458—i� 500 500 I 914 916 88-110 — <br /> 1 <br /> 1220 Quarry Lane'Pleasanton,CA 94566-4756 <br /> Telephone (925)484-1919`Facsimile (925)484-1096 <br /> Printed on 08/23/1999 17 17 Page 16 of 17 <br />