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CERTIFICATE OF ANALYSIS PAIS! <br />Analytical Laboratory <br />3935 N. Coronado Ave, Stockton CA. 95204 Phone: (209) 477-8105 <br />Chesney Consulting <br />P. 0. BOX 3794 <br />Turlock, CA 95381 <br />Project Number: Chevron -Thornton <br />Project Name: Chevron -Thornton <br />Project Manager: Don Chesney <br />Work Orticr No.: <br />Conventional Chemistry Parameters by APHA/EPA Methods - Quality Control <br />Analytc Result <br />Reporting <br />Limit Units <br />Spike <br />Level <br />Source <br />Result %REC RP() oles <br />Matrix Spike Dup (AC21716-MSDI) <br />Chloride <br />Nitrate as N <br />Reference (AC21716-SRM1) <br />16.6 <br />3.11 <br />1,25 <br />0.400 <br />mg/L 12.5 <br />2.82 <br />441 <br />ND <br />97 <br />110 <br />0.3 <br />0 02 <br />Chloride <br />Nitrate as N <br />21.5 <br />9.69 <br />1.00 <br />0.400 <br />mg/L 20.0 <br />9.03 <br />108 <br />107 <br />Blank (AC21805-BLK1) <br />Total Suspended Solids (TSS) <br />LCS (AC218054S1) <br />ND 1.0 mg/L <br />Total Suspended Solids (TSS) <br />Duplicate (AC21805-DUP1) <br />1000 1.0 mg/L 1000 100 <br />Total Suspended Solids (TSS) 310 1.0 mg/L 310 0 <br />Blank (AC22107-BLK1) <br />Total Kjeldahl Nitrogen <br />LCS (AC22107-BSI) <br />ND 0.600 mg/L <br />Total Kjeldahl Nitrogen <br />LCS Dup (AC22107-BSD1) <br />8.07 0.600 mg/L 10.0 81 <br />Total Kjeldahl Nitrogen 6.99 0.600 mg/L 10.0 70 14 <br />Precision Enviro-Tech. <> California ELAP Cert. #2387 <br />Page 6 of 10