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COLUMBIA ANALYTICAL SERVICES,INC. <br /> QA/QC Report <br /> Client • Shaw Environmental&Infrastructure,Inc. Service Request: L0600004 <br /> Project Name:• N. County LF,San Joaquin County 1st Storm Event Date Collected: NA <br /> Project Number: 791288/00005000 Date Received : NA <br /> Sample Matrix . WATER Date Extracted : NA <br /> Date Analyzed : 01/04-10/06 <br /> Laboratory Control Sample Summary <br /> Inorganic Parameters <br /> Sample Name: Laboratory Control Sample Basis : NA <br /> Lab Code: L0600004-LCS <br /> Test Notes <br /> CAS <br /> Percent <br /> Recovery <br /> Analysis Percent Acceptance Res <br /> Analyte Units Method True Value Result Recovery Limits Notes <br /> Alkalinity as CaCO3,Total mg/L(ppm) SM 2320B 86.1 90.6 105 85-115 <br /> Chloride mg/L(ppm) 300.0 10.0 10.1 101 92-109 <br /> Nitrate as Nitrogen mg/L(ppm) 300.0 2.26 2.21 98 92-108 <br /> Solids,Total Dissolved(TDS) mg/L(ppm) 160.1 100 98.0 98 76-119 <br /> Solids,Total Suspended(TSS) mg/L(ppm) 160.2 100 95.0 95 87-105 <br /> Sulfate mg/L(ppm) 300.0 20.0 19.9 100 94-109 <br /> Approved By: Date <br /> Renort RwWiinp.mnn <br />