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QC Sample Results <br /> Client: Cornerstone Earth Group Job ID: 720-100505-1 <br /> Project/Site: 14800 Schulte Rd <br /> Method: 9056A -Anions, Ion Chromatography <br /> Lab Sample ID: MB 550-225684/1-A Client Sample ID: Method Blank <br /> Matrix: Solid Prep Type: Soluble <br /> Analysis Batch: 225706 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> Nitrate as N ND 0.99 mg/Kg 11/16/20 20:25 1 <br /> Nitrite as N ND 0.99 mg/Kg 11/16/20 20:25 1 <br /> Nitrate Nitrite as N ND 0.99 mg/Kg 11/16/20 20:25 1 <br /> Lab Sample ID: LCS 550-225684/2-A Client Sample ID: Lab Control Sample <br /> Matrix: Solid Prep Type: Soluble <br /> Analysis Batch: 225706 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Nitrate as N 39.8 42.9 mg/Kg 108 80-120 <br /> Nitrite as N 39.8 42.3 mg/Kg 106 80-120 <br /> Nitrate Nitrite as N 79.6 85.2 mg/Kg 107 80-120 <br /> Lab Sample ID: LCSD 550-225684/3-A Client Sample ID: Lab Control Sample Dup <br /> Matrix: Solid Prep Type: Soluble <br /> Analysis Batch: 225706 <br /> Spike LCSD LCSD %Rec. RPD <br /> Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> Nitrate as N 39.8 43.5 mg/Kg 109 80-120 1 20 <br /> Nitrite as N 39.8 42.4 mg/Kg 107 80-120 0 20 <br /> Nitrate Nitrite as N 79.6 85.9 mg/Kg 108 80-120 1 20 <br /> Lab Sample ID: 720-100505-1 MS Client Sample ID: HA-1 @ 36" <br /> Matrix: Solid Prep Type: Soluble <br /> Analysis Batch: 225706 <br /> Sample Sample Spike MS MS %Rec. <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits <br /> Nitrate as N ND 39.6 46.0 mg/Kg 115 80-120 <br /> Nitrite as N ND 39.6 42.6 mg/Kg 108 80-120 <br /> Nitrate Nitrite as N ND 79.2 88.6 mg/Kg 112 80-120 <br /> Lab Sample ID: 720-100505-1 MSD Client Sample ID: HA-1 @ 36" <br /> Matrix: Solid Prep Type: Soluble <br /> Analysis Batch: 225706 <br /> Sample Sample Spike MSD MSD %Rec. RPD <br /> Analyte Result Qualifier Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> Nitrate as N ND 39.8 46.0 mg/Kg 114 80-120 0 20 <br /> Nitrite as N ND 39.8 42.3 mg/Kg 106 80-120 1 20 <br /> Nitrate Nitrite as N ND 79.6 88.3 mg/Kg 111 80-120 0 20 <br /> Lab Sample ID: 720-100505-1 DU Client Sample ID: HA-1 @ 36" <br /> Matrix: Solid Prep Type: Soluble <br /> Analysis Batch: 225706 <br /> Sample Sample DU DU RPD <br /> Analyte Result Qualifier Result Qualifier Unit D RPD Limit <br /> Nitrate as N ND ND mg/Kg 0.5 15 <br /> Nitrite as N ND ND mg/Kg NC 15 <br /> Nitrate Nitrite as N ND ND mg/Kg NC 15 <br /> Eurofins TestAmerica, Pleasanton <br /> Page 7 of 18 11/19/2020 <br />