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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 Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />1 — <br />"When Quality Counts" http://www,mccampbell.com / E-mail: main@mccampbell.com <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 6 of 10 <br />Quality Control Report <br />Client: AdvancedGeo, Inc. <br />WorkOrder: <br />22031791 <br />Date Prepared: 03/29/2022 <br />BatchID: <br />242328 <br />Date Analyzed: 03/29/2022 <br />Extraction Method: <br />SW5030B <br />Instrument: GC28 <br />Analytical Method: <br />SW8260B <br />Matrix: Water <br />Unit: <br />µg/L <br />Project: Martin Property <br />Sample ID: <br />MB/LCS/LCSD-242328 <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-chloro propane <br />ND 0.010 0.020 <br />- <br />- <br />- <br />Surrogate Recovery <br />4 -BFB <br />2.4 <br />2.5 <br />95 <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 />1.4 1.6 1.6 87 <br />102 <br />50-130 15.9 <br />20 <br />Surrogate Recovery <br />4 -BFB <br />2.4 2.4 2.5 96 <br />95 <br />70-130 0.781 <br />20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 6 of 10 <br />