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zESO McCampbell Analytical. Inc. <br />"When Quality Counts" <br />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 <br /> <br />Quality Control Report <br />Client: Petralogix WorkOrder: 2104A52 <br />Date Prepared: 04/19/2021 - 04/20/2021 BatchID: 219768 <br />Date Analyzed: 04/19/2021 - 04/20/2021 <br /> Extraction Method: E300.1 <br />Instrument: 1C4 <br /> Analytical Method: E300.1 <br />Matrix: Water Unit: mg/L <br />Project: NLS/SSS <br /> Sample ID: MB/LCS/LCSD-219768 <br />QC Summary Report for E300.1 <br />Analyte MB MDL RL SPK MB SS MB SS <br />Result Val %REC Limits <br />Nitrate as N ND 0.0460 0.100 <br />Nitrate as NO3 ND 0.200 0.440 <br />Surrogate Recovery <br />Malonate 0.106 0.1 106 90-115 <br />Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br />Result Result Val %REC %REC Limits Limit <br />Nitrate as N 0.981 1.00 1 98 100 85-115 2.00 20 <br />Nitrate as NO3— 4.35 4.43 4.4 99 101 85-115 2.00 20 <br />Surrogate Recovery <br />Malonate 0.101 0.103 0.10 101 103 90-115 1.65 20 <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 6 of 11