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C H RO MA LAB, INC. Submission # 1999-05-1062 <br /> Environmental Services (SDS) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Greg Schramn Prep Method 5030 <br /> Batch QC Report <br /> Volatile Organic Compounds <br /> Laboratory Control Spike(LCS/LCSD) Water QC Batch #1999105113-01 09 <br /> LCS 1999105113-01 09-002 Extracted 05/13/1999 12 09 Analyzed 05/13/4999 12 09 <br /> LCSD 1999105113-01 09-003 Extracted 05/13/4999 12 57 Analyzed 05/13/1999 12 57 <br /> Compound Conc [ug/L] Added Recovery% RPD I Control Limits% Flags <br /> LCS LCSD Amount LCS LCSD i Recovery RPD , LCS LCSD <br /> Benzene 51090 1507 63 I 500 1022 1015 1 07 1 69-129 20 <br /> Chlorobenzene 55611 156044 i 500 1112 1 1121 j 0 8 61-121 20 <br /> 1 1-Dichloroethene 49520 148092 500 990 962 1 29 65-125 20 <br /> Toluene 50025 50554 500 1001 i 101 1 1 0 70-130 20 <br /> Tnchloroethene 48800 48216 500 976 964 1 2 74-134 20 <br /> Surrogate(s) I4 <br /> 4-Bromofiuorobenzene 49268 1481 62 500 985 1 963 86-115 <br /> 1 2-Dichloroethane-d4 50505 ; 456 66 ; 500 1010 913 76-114 <br /> Toluene-d8 51078 50554 500 1022 1 101 1 88-110 <br /> r <br /> 1220 Quarry Lane'Pleasanton Califomia 94566-4756 <br /> Telephone (925)4841919'Facsimile (925)484-1096 <br /> Printed on 05119/1999 15 19 Page 20 of 24 <br />