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GeoAnalytical Laboratories, Inc. <br />2300 Maryann Dr. Turlock, CA 95380 Phone (209) 669-0100 Fax (209) 668-8516 <br />email: lab.geo@att.net <br />Report # V910224 Project: 25327 Jones Road, Escalon CA 95320 <br />San Joaquin County Environmental Health <br />600 East Main Street : PA# 197375 <br />Stockton, CA 95202 <br />Volatile Organic Chemistry - Quality Control <br />GeoAnalytical Laboratories, Inc. <br />Date: 09/10/09 <br />Date Recd: 09/02/09 <br />Reporting Spike Source ®/®REC RPD <br />Analvie Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch V002519 - EPA 5030B <br />11.6 <br />1.0 ug/L <br />Prepared & Analyzed: 09/09/09 <br />Blank (V002519-BLK I) <br />116 <br />80-120 <br />_ <br />sec-Butylbenzene <br />ND <br />1.0 <br />ug/L <br />Styrene <br />ND <br />LO <br />" <br />tert-Butylbenzene <br />ND <br />1.0 <br />" <br />Tetrachlorocthylene(PCE) <br />ND <br />1.0 <br />" <br />Toluene <br />ND <br />1.0 <br />" <br />trans-l,2-Diehloroethylene <br />ND <br />1.0 <br />" <br />Trichloroethylene <br />ND <br />1.0 <br />" <br />Trichlorofluoromethane <br />ND <br />1.0 <br />" <br />Trichlorotrifluoroethane <br />ND <br />1.0 <br />" <br />Vinyl chloride <br />ND <br />1.0 <br />" <br />Surrogate: 1,2-Dichloroethane-d4 <br />4.81 <br />4.89 <br />" 5.000 96 72-131 <br />Surrogate:2-Bromo-I-Chloropropane <br />4.65 <br />98 <br />5.000 93 71-134 <br />Surrogate:4-Bromofluorobenzene <br />4.78 <br />5.000 96 74-132 <br />LCS (V002519 -BSI) <br />1, 1 -Dichlomethane <br />11.6 <br />1.0 ug/L <br />10.00 <br />116 <br />80-120 <br />Benzene <br />11.3 <br />1.0 <br />10.00 <br />113 <br />80-120 <br />Methyl tent -Butyl Ether (MTBE) <br />11.1 <br />1.0 <br />10.00 <br />111 <br />80-120 <br />Monoehlorobenzene <br />10.4 <br />1.0 <br />10.00 <br />104 <br />80-120 <br />Toluene <br />10.6 <br />1.0 <br />10.00 <br />106 <br />80-120 <br />Trichlorocthylene <br />11.2 <br />1.0 <br />10.00 <br />112 <br />80-120 <br />Surrogate: 1,2-Dichloroethane-d4 <br />5.29 <br />5.000 <br />106 <br />72-132 <br />Surrogate:2-Bromo-l-Chloropropane <br />4.89 <br />5.000 <br />98 <br />71-134 <br />Surrogate:4-Bromofluorobenzene <br />4.65 <br />5.000 <br />93 <br />74-132 <br />Matrix Spike(V102519-MSI) <br />Source: <br />V910808-02 <br />1. 1 -Dichloroethanc <br />10.7 <br />1.0 ug/L <br />10.00 <br />ND <br />107 <br />70-143 <br />Benzene <br />11.0 <br />1.0 <br />10.00 <br />ND <br />I10 <br />78-119 <br />Methyl tart -Butyl Ether (MTBE) <br />10.9 <br />1.0 <br />10.00 <br />ND <br />109 <br />75-139 <br />Monoehlorobenzene <br />10.9 <br />DA " <br />10.00 <br />ND <br />109 <br />69-124 <br />Toluene <br />11.4 <br />I.0 <br />10.00 <br />ND <br />114 <br />70-129 <br />Trichloroethylene <br />11.1 <br />1.0 <br />10.00 <br />ND <br />111 <br />84-122 <br />Surrogate: 1,2-Dickloroethane-d4 <br />4.75 <br />3.000 <br />95 <br />72-132 <br />Surrogate:2-Bromo-l-Chloropropane <br />5.08 <br />5.000 <br />102 <br />71-134 <br />Surrogate:4-Bromofluorobenzene <br />4.67 <br />5.000 <br />93 <br />74-132 <br />Certification # 2595 <br />