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Ceoo gccnTecTiccs, Inc. <br /> Groundwater Monitoring Field Log <br /> Project Name: City of Escalon(WDR) Well I.D.: MW-9 <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 /> 9:10 1 0.0 22.03 752 7.60 209.2 10.50 Brown, no odor,very few sediments <br /> 9:15 3.5 19.11 768 6.64 229.4 9.98 Clearish brown, no odor,very few sediments <br /> 9:20 7.0 19.07 766 6.70 207.5 9.56 Clearish brown, no odor,very few sediments <br /> 9:25 10.5 19.08 756 6.69 201.9 9.49 Clearish brown, no odor,very few sediments <br /> 9:30 Collected samples <br /> Purge Method: El Dedicated Waterra ❑Centrifugal pump with dedicated tubing ❑Other <br /> Pumping Rate: 0.7 gal/min <br /> Well Constructed TD(ft): 55.50 Sample Containers used: 3 #VOAs X preserved_non-preserved <br /> 'Well TD(fty 55.05 1 #polys 100 ml X preserved_non-preserved <br /> Silt Thickness(ft): 0.45 1 #polys 250 ml preserved X non-preserved <br /> Initial DTW(tty 35.28 1 #polys 1L preserved X non-preserved <br /> Water column height (ft): 19,77 Notes: <br /> One casing volume(gap: 3.36 <br /> Final DTW(ft): 35.30 Sampled By: E. Nona <br /> Casing diameter (in): 2" <br /> Sample Method: Waterra 0 Bailer❑ Other ❑ =measured _®sampling Purged Water Drummed: ❑ Yes ❑x No <br /> Gallons per foot of casing. 2"dia.=0.17, 3"dia.=0.36 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 />