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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 />Forward Landfill-Forward GTWS <br />Drew Feucht <br />Reported:07/25/2023 12:23 <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: B170280 <br />Benzene B170280-BS1 LCS 27.950 25.000 112 70 - 130ug/L 1 <br />Bromodichloromethane B170280-BS1 LCS 25.440 25.000 102 70 - 130ug/L 1 <br />Chlorobenzene B170280-BS1 LCS 25.880 25.000 104 70 - 130ug/L 1 <br />Chloroethane B170280-BS1 LCS 25.750 25.000 103 70 - 130ug/L 1 <br />1,4-Dichlorobenzene B170280-BS1 LCS 26.830 25.000 107 70 - 130ug/L 1 <br />1,1-Dichloroethane B170280-BS1 LCS 27.970 25.000 112 70 - 130ug/L 1 <br />1,1-Dichloroethene B170280-BS1 LCS 26.870 25.000 107 70 - 130ug/L 1 <br />Toluene B170280-BS1 LCS 26.780 25.000 107 70 - 130ug/L 1 <br />Trichloroethene B170280-BS1 LCS 26.150 25.000 105 70 - 130ug/L 1 <br />1,2-Dichloroethane-d4 (Surrogate)B170280-BS1 LCS 10.480 10.000 105 75 - 125ug/L 1 <br />Toluene-d8 (Surrogate)B170280-BS1 LCS 10.020 10.000 100 80 - 120ug/L 1 <br />4-Bromofluorobenzene (Surrogate)B170280-BS1 LCS 10.220 10.000 102 80 - 120ug/L 1 <br />QC Batch ID: B170442 <br />Benzene B170442-BS1 LCS 24.450 25.000 97.8 70 - 130ug/L 2 <br />Bromodichloromethane B170442-BS1 LCS 22.720 25.000 90.9 70 - 130ug/L 2 <br />Chlorobenzene B170442-BS1 LCS 20.190 25.000 80.8 70 - 130ug/L 2 <br />Chloroethane B170442-BS1 LCS 23.050 25.000 92.2 70 - 130ug/L 2 <br />1,4-Dichlorobenzene B170442-BS1 LCS 20.190 25.000 80.8 70 - 130ug/L 2 <br />1,1-Dichloroethane B170442-BS1 LCS 24.500 25.000 98.0 70 - 130ug/L 2 <br />1,1-Dichloroethene B170442-BS1 LCS 23.580 25.000 94.3 70 - 130ug/L 2 <br />Toluene B170442-BS1 LCS 21.740 25.000 87.0 70 - 130ug/L 2 <br />Trichloroethene B170442-BS1 LCS 21.910 25.000 87.6 70 - 130ug/L 2 <br />1,2-Dichloroethane-d4 (Surrogate)B170442-BS1 LCS 11.490 10.000 115 75 - 125ug/L 2 <br />Toluene-d8 (Surrogate)B170442-BS1 LCS 10.510 10.000 105 80 - 120ug/L 2 <br />4-Bromofluorobenzene (Surrogate)B170442-BS1 LCS 10.650 10.000 106 80 - 120ug/L 2 <br />Run #QC Sample ID QC Type Method Prep Date <br />Run <br />Analyst Instrument DilutionDate Time <br /> 1 B170280-BS1 LCS EPA-8260B ADC MS-V15 107/20/23 07/20/23 10:48 <br /> 2 B170442-BS1 LCS EPA-8260B ADC MS-V15 107/24/23 07/24/23 11:16 <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 20 of 23Report ID: 1001442650