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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:01/23/2025 17:34 <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 />Volatile Organic Analysis (EPA Method 8260B) <br />Source Lab <br />R# <br />QC Batch ID: B204491 Used client sample: N <br />MS1,1-Dichloroethene 26.330 70 - 130ND25.000 1052500656-04 ug/L 3 <br />MSD 26.220 0.4 20 70 - 130ND25.000 1052500656-04 ug/L 4 <br />MSToluene 25.580 70 - 130ND25.000 1022500656-04 ug/L 3 <br />MSD 25.560 0.1 20 70 - 130ND25.000 1022500656-04 ug/L 4 <br />MSTrichloroethene 25.910 70 - 130ND25.000 1042500656-04 ug/L 3 <br />MSD 26.150 0.9 20 70 - 130ND25.000 1052500656-04 ug/L 4 <br />MS1,2-Dichloroethane-d4 (Surrogate)10.130 75 - 125ND10.000 1012500656-04 ug/L 3 <br />MSD 9.9400 1.9 75 - 125ND10.000 99.42500656-04 ug/L 4 <br />MSToluene-d8 (Surrogate)10.070 80 - 120ND10.000 1012500656-04 ug/L 3 <br />MSD 9.9500 1.2 80 - 120ND10.000 99.52500656-04 ug/L 4 <br />MS4-Bromofluorobenzene (Surrogate)10.500 80 - 120ND10.000 1052500656-04 ug/L 3 <br />MSD 10.200 2.9 80 - 120ND10.000 1022500656-04 ug/L 4 <br />Run # QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B204428-MS1 MS EPA-8260B AGB MS-V21 101/15/25 01/16/25 01:06 <br /> 2 B204428-MSD1 MSD EPA-8260B AGB MS-V21 101/15/25 01/16/25 01:31 <br /> 3 B204491-MS1 MS EPA-8260B AGB ms-v21 101/16/25 01/16/25 13:01 <br /> 4 B204491-MSD1 MSD EPA-8260B AGB ms-v21 101/16/25 01/16/25 13:26 <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 41 of 49Report ID: 1001565692