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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:Advanced GeoEnvironmental, Inc. <br />Project:Menchaca Property <br />Date Analyzed:7/22/19 - 7/23/19 <br />Date Prepared:7/22/19 - 7/23/19 <br />WorkOrder:1907936 <br />BatchID:182085 <br />Analytical Method:E300.1 <br />Unit:mg/L <br />Sample ID:MB/LCS/LCSD-182085 <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 0.053 0.10 --- <br />Nitrate as NO3¯ND 0.23 0.44 --- <br />Surrogate Recovery <br />Formate 0.10 0.10 104 85-115 <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 0.95 0.96 1 95 96 85-115 0.572 15 <br />Nitrate as NO3¯4.2 4.2 4.4 96 96 85-115 0 15 <br />Surrogate Recovery <br />Formate 0.097 0.098 0.10 97 98 90-115 0.934 10 <br />CA ELAP 1644 • NELAP 4033ORELAP <br />Page 4 of 8Page 4 of 8