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1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />M c C a m p b e I l Analytical , Inc. Toll Free Tcicphonc: (877) 252-9262 / Fax: (925) 252-9269 <br />17-z- "When Quality Counts" http://www.niceampbell.coni / E-mail: main(a mccampbell.com <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 6 of 10 <br />Quality Control Report <br />Client: AdvancedGeo, Inc. <br />WorkOrder: <br />2208131 <br />Date Prepared: 08/03/2022 <br />BatchID: <br />251047 <br />Date Analyzed: 08/03/2022 <br />Extraction Method: <br />SW5030B <br />Instrument: GCI 8 <br />Analytical Method: <br />SW8260B <br />Matrix: Water <br />Unit: <br />µg/L <br />Project: Postman Property <br />Sample ID: <br />MB/LCS/LCSD-251047 <br />QC Summary Report for SW8260B <br />Analyte <br />MB MDL RL <br />SPK <br />MB SS <br />MB SS <br />Result <br />Val <br />%REC <br />Limits <br />1,2-Dibromo-3-chloropropane <br />ND 0.010 0.020 <br />- <br />- <br />- <br />Surrogate Recovery <br />4 -BFB <br />23 <br />25 <br />92 <br />70-130 <br />Analyte <br />LCS LCSD SPK LCS <br />LCSD <br />LCS/LCSD RPD <br />RPD <br />Result Result Val %REC %REC <br />Limits <br />Limit <br />1,2-Dibromo-3-chloropropane <br />1.7 1.6 1.6 104 <br />102 <br />50-130 1.79 <br />20 <br />Surrogate Recovery <br />4 -BFB <br />25 25 25 98 <br />100 <br />70-130 1.67 <br />20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 6 of 10 <br />