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pp RTMOR TE p O TCH CERTIFICATE OFANALYSIS <br /> Analytical Laboratory <br /> 3935 N.Coronado Ave,Stockton CA.95204 Phone:(209)477-8105 <br /> Chesney Engieering,Inc Project Number: Chevron-Thornton <br /> P.O.BOX 3794 Project Name: Chevron-Thornton Work Order No.: <br /> Turlock,CA 95381 <br /> Project Manager: Don Chesney <br /> Conventional Chemistry Parameters by APHA/EPA Methods-Quality Control <br /> Reporting Spike Source <br /> Analyte Result Limit Units Level Result °/oREC RPD Notes <br /> Blank(AC62702-BLK1) <br /> Nitrate as N ND 0.400 mg/L <br /> Nitrite as N ND 0.200 " <br /> LCS(AC62702-BS1) <br /> Nitrite as N 10.0 0.200 mg/L 10.0 100 <br /> Nitrate as N 98.0 0.400 100 98 <br /> LCS Dup(AC62702-BSD1) <br /> Nitrite as N 9.58 0.200 mg/L 10.0 96 5 <br /> Nitrate as N 94.6 0.400 100 95 4 <br /> Calibration Blank(AC62702-CCB1) <br /> Nitrite as N 0.00 mg/L <br /> Nitrate as N 0.00 " <br /> Calibration Blank(AC62702-CCB2) <br /> Nitrite as N 0.00 mg/L <br /> Nitrate as N 0.00 " <br /> Calibration Blank(AC62702-CCB3) <br /> Nitrite as N 0.00 mg/L <br /> Nitrate as N 0.00 " <br /> Calibration Check(AC62702-CCV1) <br /> Nitrite as N 10.6 0.200 mg/L 10.0 106 <br /> Nitrate as N 93.9 0.400 100 94 <br /> Calibration Check(AC62702-CCV2) <br /> Nitrite as N 10.8 0.200 mg/L 10.0 108 <br /> Precision Enviro-Tech. o California ELAP Cert.#2387 <br /> Page 4 of 10 <br />