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PRMOH f m po=yu CERTIFICATE OFANALYSIS <br /> Analytical Laboratory <br /> 3935 N.CoronadoAve.Swckton CA.95204 Phone:(209)477-8105 <br /> Chesney Consulting Project Number: Chevron-Thornton <br /> P.0.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 /> Analyte Result Limit Units Level Result %PEC RPD <br /> Blank(AC21711-BLKI) <br /> Biochemical Oxygen Demand ND 2.0 mg L <br /> Duplicate(AC21711-DUPI) <br /> Biochemical Oxygen Demand 3800 2.0 mg/L 3000 6 <br /> Reference(AC21711-SRMI) <br /> Biochemical Oxygen Demand 200 2.0 mg/L 198 99 <br /> Duplicate(AC21712-DUPI) <br /> Dissolved Oxygen 2.88 0.10 mgt 2.89 0.3 <br /> nuplicate(AC21713-DUPI) <br /> PH 7.70 0.0100 pH Units 7.70 0.01 <br /> Rcfcrcncc(AC21713-SRM 1) <br /> PH 7.00 G 0100 pl l Units 7.00 100 <br /> nuplicate(AC21714-DUPI) <br /> Specific Conductance(EC) <br /> 613 1.00 umhos/cm 614 0_2 <br /> Reference(AC21714-SRMI) <br /> Specific Conductance(EC) 101 1.00 umhos/cm 102 100 <br /> Precision Enviro-Tech. :> California LLAP Cert.#2387 <br /> Page 4 of 10 <br />