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C H ROMALAB, INC. Submission # 1999-05-1049 <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 # 1999105117-02 06 <br /> LCS 1999105117-02 06-002 Extracted 05/17/1999 14 09 Analyzed 05/17/1999 14 09 <br /> LCSD 1999105117-02 06-003 Extracted 05/17/1999 14 48 Analyzed 05/17/1999 14 48 <br /> Compound Conc {ug/Kg ] Added Recovery % I RPD Control Limits % Flags <br /> LCS LCSD Amount LCS LCSD i Recovery RPD LCS LCSD <br /> Benzene 5491 5495 500 1098 1099 01 69-129 20 <br /> Chlorobenzene 535 5385 500 1070 1077 0 7 61-121 20 <br /> 1 1-Dichloroelhene 5152 5349 500 103 0 1070 ', 38 65-125 20 <br /> Toluene 5377 5456 500 1075 1091 1 5 70-130 20 <br /> Trichloroethene 5179 5209 500 1036 1042 0 6 74-134 20 <br /> Surrogate(s) <br /> 4-Bromofluorobenzene 4948 4739 500 99 0 948 <br /> 74 121 <br /> 1 2-Dichloroethane-d4 5606 5367 500 1121 1073 70-121 <br /> Toluene-dS 5351 5147 500 1070 1029 I 81-117 <br /> l i <br /> 1220 Quarry Lane "Pleasanton California 94566-4756 <br /> Telephone (925)4a4-1919' Facsimile (925)484-1096 <br /> Pnnted on 05/19/1999 11 25 Page 11 of 13 <br />