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APTIM - Solid Waste Department <br />4171 Essen Lane <br />Baton Rouge, LA 70809 <br />Project: <br />Project Number: <br />Project Manager: <br />Foothill Landfill, SJ County <br />631038217 <br />Sandra Pimienta <br />Reported:01/22/2025 17:07 <br />Quality Control Report - Precision & Accuracy <br />Constituent Sample IDType Result Result Added Units RPD Recovery RPD Recovery Quals <br />Source Spike Percent Percent <br />Control Limits <br />Water Analysis (General Chemistry) <br />Source Lab <br />R# <br />QC Batch ID: B204521 Used client sample: N <br />Total Magnesium DUP 12.141 0.1 2012.1342500656-04 mg/L 12 <br />MS 21.228 75 - 12512.134 10.000 90.92500656-04 mg/L 13 <br />MSD 22.352 5.2 20 75 - 12512.134 10.000 1022500656-04 mg/L 14 <br />Total Sodium DUP 30.264 0.6 2030.4482500656-04 mg/L 12 <br />MS 38.497 75 - 12530.448 10.000 80.52500656-04 mg/L 13 <br />MSD 40.296 4.6 20 75 - 12530.448 10.000 98.52500656-04 mg/L 14 <br />Total Potassium DUP 4.6427 0.8 204.68232500656-04 mg/L 12 <br />MS 14.203 75 - 1254.6823 10.000 95.22500656-04 mg/L 13 <br />MSD 15.241 7.1 20 75 - 1254.6823 10.000 1062500656-04 mg/L 14 <br />QC Batch ID: B204544 Used client sample: N <br />Total Dissolved Solids @ 180 C DUP 635.00 3.9 10660.002500664-01 mg/L 15 <br />QC Batch ID: B204731 Used client sample: N <br />Total Cyanide DUP ND 10ND2500955-01 mg/L 16 <br />MS 0.10169 85 - 115ND0.10000 1022500955-01 mg/L 17 <br />The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. <br />All results listed in this report are for the exclusive use of the submitting party. Pace Analytical assumes no responsibility for report alteration, separation, detachment or third party interpretation. <br />4100 Atlas Court Bakersfield, CA 93308 (661) 327-4911 FAX (661) 327-1918 www.pacelabs.com Page 34 of 40Report ID: 1001565394