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COLUMBIA ANALYTICAL SERVICES, INC. <br />QA/QC Report <br />Client: Shaw Environmental & Infrastructure, Inc <br />Project: Foothill Landfill, San Joaquin County (New Wells)/124591 <br />Sample Matrix: Water <br />Surrogate Recovery Summary <br />Chlorinated herbicides <br />Surl = 2,4-Dichlorophenylacetic Acid 19-105 <br />Results flagged with an asterisk (°) indicate values outside control criteria. <br />Results flagged with a pound (#) Indicate the control criteria Is not applicable. <br />91. <br />Printed: 09/02/2007 1.3:16:04 Form 2A - Organic <br />u:\Stea€th\Crystal. rpt\Form2.rpt <br />Service Request: P0700704 <br />Units: PERCENT <br />Level: Low <br />00061 <br />Page 1 of 1 <br />Superset Reference: RR76177 <br />Extraction Method: METHOD <br />Analysis Method: 8151A <br />Surl <br />Sample Name, <br />Lab Code <br />MW -4 <br />P0700704-001 <br />72 <br />MW -5 <br />P0700704-002 <br />52 <br />Method Blank <br />KWG0708426-3 <br />74 <br />Lab Control Sample <br />KWG0708426-1 <br />83 <br />Duplicate Lab Control Sample <br />KWG0708426-2 <br />77 <br />Surrogate Recovery Control Limits <br />(%) <br />Surl = 2,4-Dichlorophenylacetic Acid 19-105 <br />Results flagged with an asterisk (°) indicate values outside control criteria. <br />Results flagged with a pound (#) Indicate the control criteria Is not applicable. <br />91. <br />Printed: 09/02/2007 1.3:16:04 Form 2A - Organic <br />u:\Stea€th\Crystal. rpt\Form2.rpt <br />Service Request: P0700704 <br />Units: PERCENT <br />Level: Low <br />00061 <br />Page 1 of 1 <br />Superset Reference: RR76177 <br />