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ENVIRONMENTAL* <br /> Analytical Chemists <br /> GROUNDWATER SAMPLING & PURGE LOG <br /> Date:2023-03-27 LabID# STK2333598 Client:EKI - Mossdale - EFS - GWM <br /> Tech. Name: Justin J. Addison Project Name/No: Quarterly <br /> Well No: MWM-5 Well Completion Depth: 20.48 ft. <br /> Depth to Water(sounded depth): 8.70 ft. Reference Point: North Side Top Casing <br /> Height of Water Column: 11.78 ft. Casing Diameter: 4 in. <br /> Casing Volume: 7.65 gal= Height of Column x Volume/ft. (2"=0.163, 4"=0.650, 6"=1.43 gal/ft) <br /> Amount to be purged: 22.95 gal = Casing Volume x 3 (volumes required) <br /> Purge Rate: 2•0 gal Purge Method: P10250 <br /> Time Purge Vol pH EC Temp ORP Turb D.O. Comments <br /> gal umhos/cm °C mV mg/L <br /> 0853 Start <br /> 0857 8 7.32 3816 17.7 392.0 Clear 7.45 <br /> 0901 16 7.31 3678 17.9 386.2 Clear 6.04 <br /> 0905 24 7.35 3616 18.2 380.3 Clear 6.35 <br /> 0906 Sample <br /> 0908 Finish <br /> Total Purge Time: 12 min Total Purge Volume: 24 gal <br /> Recharge Depth: 15.50 ft. Time: 0913 Sampling Method: Field Filtered <br /> Decontamination Procedure: <br /> Cleaned and disinfected at laboratory prior to use. <br /> Notes: <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />