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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:Petralogix <br />Project:SSS/NLS-S Koster Road <br />Date Analyzed:09/07/2021 <br />Date Prepared:09/07/2021 <br />WorkOrder:2109270 <br />BatchID:229157 <br />Analytical Method:E300.1 <br />Unit:mg/L <br />Sample ID:MB/LCS/LCSD-229157 <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 0.0981 0.1 98 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 0.978 0.981 1 98 98 85-115 0.249 20 <br />Nitrate as NO3¯4.33 4.34 4.4 98 99 85-115 0.249 20 <br />Surrogate Recovery <br />Malonate 0.0988 0.0991 0.10 99 99 90-115 0.380 20 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 6 of 11