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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: Terracon <br />Date Prepared: 4/18/19 <br />Date Analyzed: 4/18/19 <br />Instrument: 1C4 <br />Matrix: Water <br />Project: NA197009; Azevedo Property <br />WorkOrder: 1904884 <br />BatchID: 176507 <br />Extraction Method: E300.1 <br />Analytical Method: E300.1 <br />Unit: mg/L <br />Sample ID: MB/LCS/LCSD-176507 <br />1904884-001AMS/MSD <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 0.053 0.10 <br />Nitrate as NO3— ND 0.23 0.44 <br />Surrogate Recovery <br />Formate 0.10 <br /> 0.10 104 85-115 <br />Analyte LCS LCSD SPK LCS LCSD LCS/LCSD RPD RPD <br />Result Result Val %REC %REC Limits Limit <br />Nitrate as N <br />0.94 0.94 1 94 94 85-115 0 15 <br />Nitrate as NO3 4.2 <br /> <br />4.2 4.4 95 95 85-115 0 15 <br />Surrogate Recovery <br />Formate 0.10 <br /> <br />0.10 0.10 <br /> 102 102 90-115 0 10 <br />Analyte MS MS MSD SPK SPKRef MS MSD MS/MSD RPD RPD <br />DF Result Result Val Val %REC %REC Limits Limit <br />Nitrate as N 1 3.5 3.5 1 2.442 108 107 85-115 0.306 15 <br />Nitrate as NO3- 1 16 16 4.4 10.81 109 108 85-115 0.306 15 <br />Surrogate Recovery <br />Formate 1 0.10 0.10 0.10 102 101 90-115 0.870 10 <br />CA ELAP 1644 • NELAP 40330RELAP <br />Page 5 of 10