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Laboratories, Inc. <br />Environmental Testing Laboratory Since 1949 <br />3eologic Associates Reported: 03/05/2012 14:57 <br />11415 West Bernardo Court, Suite 200 Project: Corral Hollow <br />San Diego, CA 92127 Project Number: 2011-0115 <br />Project Manager: John Hower <br />Volatile Organic Analysis (EPA Method 8260) <br />Quality Control Report - Precision & Accuracy <br />Control Limits <br />Source Source Spike Percent Percent Lab <br />onstituent Type Sample ID Result Result Added Units RPD Recovery RPD Recovery Quals <br />QC Batch ID: BVC0112 <br />Used client sample: <br />N <br />Benzene <br />MS <br />1203346-03 <br />NO <br />27.490 <br />25.000 <br />ug/L <br />110 <br />70-130 <br />MSD <br />1203346-03 <br />NO <br />31.020 <br />25.000 <br />ug/L <br />12.1 <br />124 <br />20 <br />70-130 <br />Bromodichloromethane <br />MS <br />1203346-03 <br />NO <br />30.810 <br />25.000 <br />ug/L <br />123 <br />70-130 <br />MSD <br />1203346-03 <br />ND <br />34.340 <br />25.000 <br />ug/L <br />10.8 <br />137 <br />20 <br />70-130 Q03 <br />Chlorobenzene <br />MS <br />1203346-03 <br />NO <br />23.160 <br />25.000 <br />ug/L <br />92.6 <br />70-130 <br />MSD <br />1203346-03 <br />NO <br />26.680 <br />25.000 <br />ug/L <br />14.1 <br />107 <br />20 <br />70 - 130 <br />Chloroethane <br />MS <br />1203346-03 <br />ND <br />27.350 <br />25.000 <br />ug/L <br />109 <br />70-130 <br />MSD <br />1203346-03 <br />ND <br />31.100 <br />25.000 <br />ug/L <br />12.8 <br />124 <br />20 <br />70-130 <br />1,4 -Dichlorobenzene <br />MS <br />1203346-03 <br />NO <br />22.650 <br />25.000 <br />ug/L <br />90.6 <br />70-130 <br />MSD <br />1203346-03 <br />NO <br />25.640 <br />25.000 <br />ug/L <br />12.4 <br />103 <br />20 <br />70-130 <br />1,1-Dichloroethane <br />MS <br />1203346-03 <br />NO <br />28.160 <br />25.000 <br />ug/L <br />113 <br />70-130 <br />MSD <br />1203346-03 <br />NO <br />32.030 <br />25.000 <br />ug/L <br />12.9 <br />128 <br />20 <br />70-130 <br />1,1-Dichloroethene <br />MS <br />1203346-03 <br />NO <br />29.030 <br />25.000 <br />ug/L <br />116 <br />70-130 <br />MSD <br />1203346-03 <br />NO <br />32.330 <br />25.000 <br />ug/L <br />10.8 <br />129 <br />20 <br />70-130 <br />Toluene <br />MS <br />1203346-03 <br />NO <br />25.680 <br />25.000 <br />ug/L <br />103 <br />70-130 <br />MSD <br />1203346-03 <br />NO <br />28.690 <br />25.000 <br />ug/L <br />11.1 <br />115 <br />20 <br />70-130 <br />Trichloroethene <br />MS <br />1203346-03 <br />0.36000 <br />26.690 <br />25.000 <br />ug/L <br />105 <br />70-130 <br />MSD <br />1203346-03 <br />0.36000 <br />30.220 <br />25.000 <br />ug/L <br />12.4 <br />119 <br />20 <br />70 - 130 <br />1,2 Dichloroethane-d4 (Surrogate) <br />MS <br />1203346-03 <br />NO <br />10.310 <br />10.000 <br />ug/L <br />103 <br />76-114 <br />MSD <br />1203346-03 <br />NO <br />9.8700 <br />10.000 <br />ug/L <br />4.4 <br />98.7 <br />76 - 114 <br />Toluene -d8 (Surrogate) <br />MS <br />1203346-03 <br />NO <br />10.430 <br />10.000 <br />ug/L <br />104 <br />88-110 <br />MSD <br />1203346-03 <br />ND <br />10.430 <br />10.000 <br />ug/L <br />0 <br />104 <br />88 - 110 <br />4-Bromofluorobenzene (Surrogate) <br />MS <br />1203346-03 <br />NO <br />10.030 <br />10.000 <br />ug/L <br />100 <br />86-115 <br />MSD <br />1203346-03 <br />NO <br />10.130 <br />10.000 <br />ug/L <br />1.0 <br />101 <br />___86-_115_ <br />The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. <br />All results listed in this report are for the exclusive use of the submitting parry. BC Laboratories, Inc. assumes no responsibility for report alteration, separation, detachment or third party interpretation. <br />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.bclabs.com Page 17 of 18 <br />