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C H RO MALAB, INC. Submission # 9999-05-9049 <br /> Environmental Services (SDB) <br /> To Aqua Science Engineers, Inc Test Method 8260A <br /> Attn Robert Kitay Prep Method 5030 <br /> Batch QC Report <br /> Volatile Organic Compounds <br /> Laboratory Control Spike (LCS/LCSD) Soil QC Batch # 1999105/14-01 06 <br /> LCS 1999105114-0106-002 Extracted 05114119991100 Analyzed 05114119991100 <br /> LCSD 1999105/14-0106-003 Extracted 05114119991139 Analyzed 051141199911 39 <br /> Compound Conc [ug/Kg ] Added Recovery % RPD Control Limits% Flags <br /> LCS LCSD Amount LCS LCSD Recovery RPD LCS LCSD <br /> Benzene 6199 5762 500 1240 1152 74 69-129 20 <br /> Chlorobenzene 5893 5814 500 1179 1163 1 4 61-121 20 <br /> 1 1-Dichioroethene 6052 5444 500 1210 1089 105 65-125 20 <br /> Toluene 6275 5839 500 1255 1168 6 0 70-130 20 <br /> Trichloroethene 58495 5594 500 1170 1119 4 5 74-134 20 <br /> Surrogate(s) <br /> 4 Bromotluorobenzene 5258 515 500 1052 1030 74-121 <br /> 1 2-Dichioroethane-d4 5582 4893 500 111 6 979 70 121 <br /> Toluene-d8 550 1 5163 500 1`100 103 3 81-117 <br /> i <br /> 1220 Quarry Lane'Pleasanton California 945664756 <br /> Telephone (925)484-1919"Facsimile (925)4841096 <br /> Printed on 05/19/1999 11 25 Page 10 of 13 <br />