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Quality Control Report <br />McCampbell Analytical, Inc.1534 Willow Pass Road, Pittsburg, CA 94565-1701 <br />Toll Free Telephone: (877) 252-9262 / Fax: (925) 252-9269 <br />http://www.mccampbell.com / E-mail: main@mccampbell.com"When Quality Counts" <br />Client:AdvancedGeo, Inc. <br />Project:Labarber Property <br />Date Analyzed:08/24/2021 <br />Date Prepared:08/24/2021 <br />WorkOrder:2108C39 <br />BatchID:228337 <br />Analytical Method:E300.1 <br />Unit:mg/L <br />Sample ID:MB/LCS/LCSD-228337 <br />Instrument:IC4 <br />Matrix:Water <br />Extraction Method:E300.1 <br />QC Summary Report for E300.1 <br />Analyte MB <br />Result <br />MDL RL SPK <br />Val <br />MB SS <br />%REC <br />MB SS <br />Limits <br />Nitrate as N ND 0.0460 0.100 --- <br />Nitrate as NO3¯ND 0.200 0.440 --- <br />Surrogate Recovery <br />Malonate 0.0991 0.1 99 90-115 <br />Analyte LCS <br />Result <br />LCSD <br />Result <br />SPK <br />Val <br />LCS <br />%REC <br />LCSD <br />%REC <br />LCS/LCSD <br />Limits <br />RPD RPD <br />Limit <br />Nitrate as N 0.960 0.961 1 96 96 85-115 0.130 20 <br />Nitrate as NO3¯4.25 4.26 4.4 97 97 85-115 0.130 20 <br />Surrogate Recovery <br />Malonate 0.0979 0.0978 0.10 98 98 90-115 0.131 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 5 of 10