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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:01/20/2025 17:15 <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: B204313 Used client sample: N <br />MSBenzene 25.420 70 - 130ND25.000 1022500656-03 ug/L 1 <br />MSD 24.480 3.8 20 70 - 130ND25.000 97.92500656-03 ug/L 2 <br />MSBromodichloromethane 25.770 70 - 130ND25.000 1032500656-03 ug/L 1 <br />MSD 25.260 2.0 20 70 - 130ND25.000 1012500656-03 ug/L 2 <br />MSChlorobenzene 26.600 70 - 130ND25.000 1062500656-03 ug/L 1 <br />MSD 26.300 1.1 20 70 - 130ND25.000 1052500656-03 ug/L 2 <br />MSChloroethane 25.990 70 - 130ND25.000 1042500656-03 ug/L 1 <br />MSD 24.980 4.0 20 70 - 130ND25.000 99.92500656-03 ug/L 2 <br />MS1,4-Dichlorobenzene 27.090 70 - 130ND25.000 1082500656-03 ug/L 1 <br />MSD 26.870 0.8 20 70 - 130ND25.000 1072500656-03 ug/L 2 <br />MS1,1-Dichloroethane 24.940 70 - 130ND25.000 99.82500656-03 ug/L 1 <br />MSD 24.250 2.8 20 70 - 130ND25.000 97.02500656-03 ug/L 2 <br />MS1,1-Dichloroethene 27.750 70 - 130ND25.000 1112500656-03 ug/L 1 <br />MSD 26.740 3.7 20 70 - 130ND25.000 1072500656-03 ug/L 2 <br />MSToluene 26.730 70 - 130ND25.000 1072500656-03 ug/L 1 <br />MSD 26.330 1.5 20 70 - 130ND25.000 1052500656-03 ug/L 2 <br />MSTrichloroethene 27.280 70 - 130ND25.000 1092500656-03 ug/L 1 <br />MSD 26.900 1.4 20 70 - 130ND25.000 1082500656-03 ug/L 2 <br />MS1,2-Dichloroethane-d4 (Surrogate)10.190 75 - 125ND10.000 1022500656-03 ug/L 1 <br />MSD 9.8500 3.4 75 - 125ND10.000 98.52500656-03 ug/L 2 <br />MSToluene-d8 (Surrogate)9.9300 80 - 120ND10.000 99.32500656-03 ug/L 1 <br />MSD 9.9600 0.3 80 - 120ND10.000 99.62500656-03 ug/L 2 <br />MS4-Bromofluorobenzene (Surrogate)10.500 80 - 120ND10.000 1052500656-03 ug/L 1 <br />MSD 10.540 0.4 80 - 120ND10.000 1052500656-03 ug/L 2 <br />Run # QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B204313-MS1 MS EPA-8260B AGB MS-V21 101/15/25 01/15/25 12:56 <br /> 2 B204313-MSD1 MSD EPA-8260B AGB MS-V21 101/15/25 01/15/25 13:21 <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 19 of 27Report ID: 1001564826