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Arcadis- SLO <br />4119 Broad Street Suite 210 <br />San Luis Obispo, CA 93401 <br />Project: <br />Project Number: <br />Project Manager: <br />Forward Landfill <br />GWTS <br />Drew Feucht <br />Reported:10/23/2023 7:32 <br />Quality Control Report - Laboratory Control Sample <br />Constituent <br />Control Limits <br />PercentPercentSpike <br />QC Sample ID Type Result Level Units Recovery RPD Recovery RPD Quals <br />Volatile Organic Analysis (EPA Method 8260B) <br />Run # <br />Lab <br />QC Batch ID: B176227 <br />Benzene B176227-BS1 LCS 22.510 25.000 90.0 70 - 130ug/L 1 <br />LCSDB176227-BSD1 22.740 25.000 91.0 1.0 70 - 130 20ug/L 2 <br />Bromodichloromethane B176227-BS1 LCS 23.850 25.000 95.4 70 - 130ug/L 1 <br />LCSDB176227-BSD1 23.780 25.000 95.1 0.3 70 - 130 20ug/L 2 <br />Chlorobenzene B176227-BS1 LCS 24.450 25.000 97.8 70 - 130ug/L 1 <br />LCSDB176227-BSD1 23.870 25.000 95.5 2.4 70 - 130 20ug/L 2 <br />Chloroethane B176227-BS1 LCS 25.160 25.000 101 70 - 130ug/L 1 <br />LCSDB176227-BSD1 25.500 25.000 102 1.3 70 - 130 20ug/L 2 <br />1,4-Dichlorobenzene B176227-BS1 LCS 26.610 25.000 106 70 - 130ug/L 1 <br />LCSDB176227-BSD1 26.000 25.000 104 2.3 70 - 130 20ug/L 2 <br />1,1-Dichloroethane B176227-BS1 LCS 21.120 25.000 84.5 70 - 130ug/L 1 <br />LCSDB176227-BSD1 21.070 25.000 84.3 0.2 70 - 130 20ug/L 2 <br />1,1-Dichloroethene B176227-BS1 LCS 23.750 25.000 95.0 70 - 130ug/L 1 <br />LCSDB176227-BSD1 22.660 25.000 90.6 4.7 70 - 130 20ug/L 2 <br />Toluene B176227-BS1 LCS 24.090 25.000 96.4 70 - 130ug/L 1 <br />LCSDB176227-BSD1 24.250 25.000 97.0 0.7 70 - 130 20ug/L 2 <br />Trichloroethene B176227-BS1 LCS 24.540 25.000 98.2 70 - 130ug/L 1 <br />LCSDB176227-BSD1 25.190 25.000 101 2.6 70 - 130 20ug/L 2 <br />1,2-Dichloroethane-d4 (Surrogate)B176227-BS1 LCS 8.7100 10.000 87.1 75 - 125ug/L 1 <br />LCSDB176227-BSD1 8.6900 10.000 86.9 0.2 75 - 125ug/L 2 <br />Toluene-d8 (Surrogate)B176227-BS1 LCS 10.080 10.000 101 80 - 120ug/L 1 <br />LCSDB176227-BSD1 10.230 10.000 102 1.5 80 - 120ug/L 2 <br />4-Bromofluorobenzene (Surrogate)B176227-BS1 LCS 9.5800 10.000 95.8 80 - 120ug/L 1 <br />LCSDB176227-BSD1 8.7000 10.000 87.0 9.6 80 - 120ug/L 2 <br />QC Batch ID: B176418 <br />Benzene B176418-BS1 LCS 31.250 25.000 125 70 - 130ug/L 3 <br />Bromodichloromethane B176418-BS1 LCS 32.480 25.000 130 70 - 130ug/L 3 <br />Chlorobenzene B176418-BS1 LCS 30.850 25.000 123 70 - 130ug/L 3 <br />Chloroethane B176418-BS1 LCS 28.760 25.000 115 70 - 130ug/L 3 <br />1,4-Dichlorobenzene B176418-BS1 LCS 29.320 25.000 117 70 - 130ug/L 3 <br />1,1-Dichloroethane B176418-BS1 LCS 30.990 25.000 124 70 - 130ug/L 3 <br />1,1-Dichloroethene B176418-BS1 LCS 31.370 25.000 125 70 - 130ug/L 3 <br />Toluene B176418-BS1 LCS 30.170 25.000 121 70 - 130ug/L 3 <br />Trichloroethene B176418-BS1 LCS 30.050 25.000 120 70 - 130ug/L 3 <br />1,2-Dichloroethane-d4 (Surrogate)B176418-BS1 LCS 10.160 10.000 102 75 - 125ug/L 3 <br />Toluene-d8 (Surrogate)B176418-BS1 LCS 10.380 10.000 104 80 - 120ug/L 3 <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 25 of 33Report ID: 1001464621