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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 4 (925)988-9600 <br /> Analytical FAX(925)988-9673 <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 09-Mar-00 10 29 <br /> Anions by EPA Method 300.0 - Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source °/aREC RPD <br /> Analyte Result Luna Units Level Result a/oREC Lunits RPD Limit Notes <br /> Batch OB22010-General Preparation <br /> Blank(OB22010-BLK1) Prepared&Analyzed 18-Feb-00 <br /> Nitrate as NO3 ND 010 mg/l <br /> Blank(OB22010-BLK3) Prepared&Analyzed 18-Feb-00 <br /> Sulfate as SO4 ND 010 m9/1 <br /> LCS(OB22010-BS1) Prepared&Analyzed 18-Feb-00 <br /> Nitrate as NO3 107 010 mgll 100 107 80-120 <br /> LCS(OB22010-BS3) Prepared&Analyzed 18-Feb-00 <br /> Sulfate as SO4 102 0 10 mg/l 100 102 80-120 <br /> Matrix Spike(OB22010-MSI) Source W002413-01 Prepared&Analyzed 18-Feb-00 <br /> Nitrate as NO3 231 20 mg/l 100 130 101 75-125 <br /> Spike(OB22010-MS3) Source W002271-01 Prepared&Analyzed 18-Feb-00 <br /> Sulfate as SO4 _- - 512 10 mg/1 500 28 968 75-125 <br /> Matnx Spike Dup(OB22010-MSDI) Source W002413-01 Prepared&Analyzed 18-Feb-00 <br /> Nitrate as NO3 233 20 mgll 100 130 103 75-125 0 862 20 <br /> Matrix Spike Dup(OB22010-MSD3) Source W002271-01 Prepared&Analyzed 18-Feb-00 <br /> Sulfate as SO4 504 10 Mg/1 500 28 952 75-125 157 20 <br /> Batch OB24015-General Preparation <br /> Blank(OB24015-BLK2) Prepared&Analyzed 24-Feb-00 <br /> Sulfate as SO4 ND 010 mgA <br /> is Analytical-Walnut Creek The results in thrs repon apply to the samples analyzed in accordance with the chain of <br /> custody documem This analytical report must he reproduced in its entirety <br /> Page 19 of 21 <br />