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pp p son TH p KCH CERTIFICATE OFANALYSIS <br /> Analytical Laboratory <br /> 3935 N.Coronado Ave,Stockton CA.95204 Phone:(209)477-8105 <br /> Chesney Engieering,Inc Project Number: Chevron-Thomton <br /> P.O.BOX 3794 Project Name: Chevron-Thomton 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 /> lAnalyte Rcsult Limit Units Level Result %REC RPD Notes <br /> Calibration Check(AC62702-CCV2) <br /> Nitrate as N 105 0.400 mg/L 100 105 <br /> Calibration Check(AC62702-CCV3) <br /> Nitrite as N 12.0 0.200 mg/L 10.0 120 <br /> Nitrate as N 105 0.400 100 105 <br /> Matrix Spike(AC62702-MS1) <br /> Nitrate as N 98.6 0.400 mg/L 100 0.884 98 <br /> Nitrite as N 10.1 0.200 10.0 0.115 100 <br /> Matrix Spike Dup(AC62702-MSD1) <br /> Nitrate as N 95.7 0.400 mg/L 100 0.884 95 3 <br /> Nitrite as N 9.79 0.200 10.0 0.115 97 3 <br /> Reference(AC62702-SRMI) <br /> Nitrate as N 93.3 0.400 mg/L 100 93 <br /> Nitrite as N 9.84 0.200 10.0 98 <br /> Blank(AC62706-BLKI) <br /> Biochemical Oxygen Demand ND 1.00 mg/L <br /> Duplicate(AC62706-DUPl) <br /> Biochemical Oxygen Demand 552 1.00 mg/L 581 5 <br /> Reference(AC62706-SRMl) <br /> Biochemical Oxygen Demand 169 1.00 mg(L 198 85 <br /> Precision Enviro-Tech. o California ELAP Cert.#2387 <br /> Page 5 of 10 <br />