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CH ROMALAS, INC. Submission # 1999-05-1062 <br /> Environmental Services(SOB) <br /> To Aqua Science Engineers, lint 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#1999/05117-01 07 <br /> LCS 1999105117-01 07-002 Extracted 05/17/1999 09 35 Analyzed 05/17/1999 09 35 <br /> LCSD 1999105117-0107-003 Extracted 05117119991014 Analyzed 05/17/1999 10 14 <br /> Compound Conc [vg/L) i Added Recovery% I RPD j Control Limits% Flags <br /> LCS I LCSD j Amount LCS LCSD I Recovery I RPD LCS I LCSD <br /> Benzene 50748 50859 1 500 1015 1017 , 0 2 I 69-129 i 20 <br /> Chlorobenzene 52519 52036 1 500 1050 1041 0 9 I 61-121 20 <br /> 1 1-Dichloroethene 48883 48568 500 978 971 0 7 I 65-125 20 <br /> Toluene 51280 j 51003 G 500 1026 1020 06 70-130 20 <br /> Trichloroethene 50691 1500 05 500 1014 1000 1 4 74-134 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 49217 49746 500 984 995 86-115 <br /> 1 2-Dichloroethane-d4 48344 493 62 500 967 98 7 76-114 <br /> Toluene-d8 509 37 51583 500 101 9 1032 88-110 <br /> 1220 Quarry Lane'Pleasanton,Califomia 94556-4756 <br /> Telephone (925)484-1919'Facs.rn le (925)484-1096 <br /> Printed on 05/19119991519 Page 22 of 24 <br />