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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 /> "When Quality Counts" http://www.mccampbell.com/E-mail:main@mccampbell.com <br /> Quality Control Report <br /> Client: AdvancedGeo,Inc. WorkOrder: 2508906 <br /> Date Prepared: 08/14/2025 -08/15/2025 BatchID: 323693 <br /> Date Analyzed: 08/14/2025 -08/15/2025 Extraction Method: E300.1 <br /> Instrument: IC4 Analytical Method: E300.1 <br /> Matrix: Water Unit: mg/L <br /> Project: James Lee Property Sample ID: MB/LCS/LCSD-323693 <br /> QC Summary Report for E300.1 <br /> Analyte MB MDL RL SPK MB IS/SS MB IS/SS <br /> Result Val %REC Limits <br /> Nitrate as N ND 0.019 0.10 <br /> Nitrate as NW ND 0.086 0.44 - - - <br /> Surrogate Recovery <br /> Malonate 0.11 0.1 108 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 0.99 0.98 1 99 98 85-115 0.0839 20 <br /> Nitrate as NO3 4.4 4.4 4.4 99 99 85-115 0.0839 20 <br /> Surrogate Recovery <br /> Malonate 0.099 0.099 0.10 99 99 90-115 0.0465 20 <br /> CA ELAP 1644 •ORELAP(NELAP)4033 <br /> Page 6 of 12 <br />