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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:Duarte Property <br />Date Analyzed:04/17/2020 <br />Date Prepared:04/17/2020 <br />WorkOrder:2004769 <br />BatchID:197259 <br />Analytical Method:E300.1 <br />Unit:mg/L <br />Sample ID:MB/LCS/LCSD-197259 <br />2004769-001AMS/MSD <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 0.0530 0.100 --- <br />Nitrate as NO3¯ND 0.230 0.440 --- <br />Surrogate Recovery <br />Malonate 0.103 0.1 103 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 0.965 0.974 1 96 97 85-115 0.909 20 <br />Nitrate as NO3¯4.27 4.31 4.4 97 98 85-115 0.909 20 <br />Surrogate Recovery <br />Malonate 0.0988 0.0988 0.10 99 99 90-115 0.0020 20 <br />Analyte MS <br />Result <br />MSD <br />Result <br />SPK <br />Val <br />SPKRef <br />Val <br />MS <br />%REC <br />MSD <br />%REC <br />MS/MSD <br /> Limits <br />RPD RPD <br />Limit <br />MS <br />DF <br />Nitrate as N 8.27 8.27 1 7.46 81,F1 81,F1 85-115 0.0477 201 <br />Nitrate as NO3¯36.6 36.6 4.4 33.0 81,F1 82,F1 85-115 0.0478 201 <br />Surrogate Recovery <br />Malonate 0.0964 0.0968 0.101 96 97 85-115 0.468 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 5 of 9