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Constituent <br />Executive Summary - Detections <br />Result PQL Units MethodMDL Lab Quals <br />2501235-03 North County LF, L-4, L-4, 1/22/2025 12:15:00PM, Client <br />Ethylbenzene 20 0.50 ug/L EPA-8260B0.098 <br />Isopropylbenzene 3.0 0.50 ug/L EPA-8260B0.14 <br />p-Isopropyltoluene 0.49 0.50 ug/L EPA-8260B0.12 J <br />Methyl t-butyl ether 9.1 0.50 ug/L EPA-8260B0.11 <br />Naphthalene 68 0.50 ug/L EPA-8260B0.36 <br />n-Propylbenzene 1.0 0.50 ug/L EPA-8260B0.11 <br />Toluene 1.5 0.50 ug/L EPA-8260B0.093 <br />Trichloroethene 0.43 0.50 ug/L EPA-8260B0.085 J <br />1,2,4-Trimethylbenzene 1.4 0.50 ug/L EPA-8260B0.12 <br />1,3,5-Trimethylbenzene 0.90 0.50 ug/L EPA-8260B0.12 <br />Vinyl chloride 3.3 0.50 ug/L EPA-8260B0.12 <br />Total Xylenes 13 1.0 ug/L EPA-8260B0.36 <br />Total Calcium 230 0.10 mg/L EPA-6010B0.015 S11 <br />Total Magnesium 130 0.050 mg/L EPA-6010B0.019 <br />Total Sodium 280 1.0 mg/L EPA-6010B0.051 <br />Total Potassium 3.5 1.0 mg/L EPA-6010B0.13 <br />Bicarbonate 730 10 mg/L EPA-310.110 A10 <br />Total Alkalinity as CaCO3 600 8.2 mg/L EPA-310.18.2 A10 <br />Chloride 680 2.5 mg/L EPA-300.00.65 A10 <br />Sulfate 2.2 5.0 mg/L EPA-300.00.70 J,A10 <br />Hardness as CaCO3 1100 0.50 mg/L Calc0.10 <br />Total Dissolved Solids @ 180 C 1800 100 mg/L EPA-160.150 A10 <br />Chemical Oxygen Demand 230 250 mg O2/L EPA-410.443 J,A10 <br />2501235-04 North County LF, L-5, L-5, 1/22/2025 11:55:00AM, Client <br />Benzene 10 0.50 ug/L EPA-8260B0.083 <br />Chloroethane 17 0.50 ug/L EPA-8260B0.14 <br />1,4-Dichlorobenzene 3.3 0.50 ug/L EPA-8260B0.062 <br />1,1-Dichloroethane 1.4 0.50 ug/L EPA-8260B0.11 <br />1,2-Dichloroethane 8.6 0.50 ug/L EPA-8260B0.17 <br />1,2-Dichloropropane 3.7 0.50 ug/L EPA-8260B0.13 <br />Ethylbenzene 9.1 0.50 ug/L EPA-8260B0.098 <br />Isopropylbenzene 4.7 0.50 ug/L EPA-8260B0.14 <br />p-Isopropyltoluene 11 0.50 ug/L EPA-8260B0.12 <br />Methylene chloride 3.4 1.0 ug/L EPA-8260B0.48 <br />Methyl t-butyl ether 7.6 0.50 ug/L EPA-8260B0.11 <br />Naphthalene 12 0.50 ug/L EPA-8260B0.36 <br />n-Propylbenzene 0.44 0.50 ug/L EPA-8260B0.11 J <br />Tetrachloroethene 0.30 0.50 ug/L EPA-8260B0.13 J <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 5 of 40Report ID: 1001567776