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Geological Tecl"ics, Inc. <br /> Groundwater Monitoring Field Log <br /> Project Name: City of Escalon(WDR) Well I.D.: MW-3 <br /> Project No.: 894.2 Date: 8/2/2011 <br /> Project Location: 25100 River Road <br /> Escalon,CA Samples sent to: Denele Labs <br /> Cumulative <br /> Volume Purged <br /> Time (gal) Temp C. EC(µs/cm) pH ORP(millivolts) DO (mg/L) Remarks <br /> 12:42 0 18.92 782 6.91 51.1 3.54 Clear, no odor, no sediments <br /> 12:55 12 18.92 782 6.60 56.3 1.21 Clear, no odor, no sediments <br /> 13:05 24 18.98 715 6.56 45.9 0.82 Clear, no odor, no sediments <br /> 13:15 36 18.94 712 6.50 45.8 0.92 Clear,no odor, no sediments <br /> 13:20 Collected samples <br /> Purge Method: El Dedicated Waterra ❑Centrifugal pump with dedicated tubing ❑Other <br /> Pumping Rate: 1.09 gai/min <br /> Well Constructed TD(ft): 49.70 Sample Containers used: 3 #VOAs X preserved_non-preserved <br /> 'Well TD(ft): 49.65 1 #polys 100 ml X preserved_non-preserved <br /> Silt Thickness(ft): 0.05 1 #polys 250 ml preserved X non-preserved <br /> Initial DTW(ft): 31.13 1 #polys 1L preserved X non-preserved <br /> Water column height (ft): 18.52 Notes: <br /> One casing volume(gap: 12.03 <br /> "Final DTW(ft): 31.13 Sampled By: E.Nona <br /> Casing diameter (in): 4" <br /> Sample Method: Waterra❑D Bailer❑ Other ❑ =measured _@ sampling Purged Water Drummed: ❑ Yes D No <br /> Gallons per foot of casing. 2"dia.=0.17, 3"dia.=0.38 4"dia.=0.65, 5"dia.=1.02, 6"dia.=1.48 No.of Drums: <br /> K:\Jobs\C Jobs\COE wdr 8942\GWM Field Logs\11\3rd Qtr 11 8/3/2011 <br />