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MONITORING WELL DEVELOPMENT LOG GEO <br /> I N C O R P O R A T E 0 <br /> Project: Mossdale Landing <br /> Project No. 8617.000.000 Well ID MWM-27 <br /> Location: Lathrop <br /> Technician: R.Gandolfo <br /> Activity: Quarterly Sampling ® Develop/Sample <br /> WELL SECURITY Date 1 4/30/2009 <br /> Well Box Set in Concrete? Yes No Comments <br /> Box Cover Equipped With Bolts and Gasket? Yes No <br /> Well Casing Equipped With Well Seal and Lock? Yes No <br /> WELL CONSTRUCTION AND WATER LEVEL DETAILS Date <br /> Well Type ® Monitoring Extraction Well with Pump Other <br /> Well Diameter 4" Free Product Measurement <br /> DTW(fbtoc) 7.21 (Enter measurements for wells with free product history) <br /> BOC(fbtoc) 23.3 Enter"Off"if no measurable free product WCV Factors <br /> WC(f) 16.19 DTFP(tbtoc) 2" = 0.17 <br /> WCV(gal) 10.62 DTW(fbtoc) 4" = 0.66 <br /> 7 X WCV(Purge Vol) 75 FPT(ft) 6 = 1.50 <br /> PURGING,SAMPLING AND DECON EQUIPMENT Date <br /> Purging: Disposable X❑ 12-V ubm. Comments <br /> Bailer Pum um WeII Development <br /> Sampling: Disposable ❑ 12-V ubm. Other <br /> Bailer Pum 4um ❑ <br /> Decon: lWas purge pump decontaminated before and after this use? Yes LJ No <br /> Decon Product: TSP/Alconox Decon Rinse:Distilled water <br /> PHYSICAL PARAMETERS Date 1 4/30/2009 <br /> Time m <br /> Volume Temp pH EC Turbidity Comnets <br /> Purged(gal) (C degrees (mS/cm) (NTUs) Salinity (%) <br /> 14:40 15 IT9 8.64 1.15 170 0.05 <br /> 14:46 20 18.0 8.48 1.09 68 0.04 <br /> 14:50 25 18.0 8.32 1.14 26 0.04 <br /> 14:55 30 18.0 8.23 1.10 16 0.04 <br /> 14:59 35 1 18.0 8.19 1.10 10 0.05 <br /> 15:04 40 18.0 8.15 1.11 13 0.05 <br /> 15:08 45 18.1 8.1 1.12 8 0.05 <br /> 15:12 50 18.1 8.05 1.12 5 0.05 <br /> 15:16 55 18.0 8.03 1.12 5 0.05 <br /> 15:20 60 18.0 8.02 1.13 6 0.05 <br /> 15:25 65 18.0 7.96 1.13 6 Q05 <br /> 15:29 70 18.0 7.98 1.13 2 0.05 <br /> 1535 75 18.0 7.96 1.14 2 0.05 <br /> DTW=Depth to Water Banc=feet below top of casing <br /> BOC=Bottom of Well Casing WC=Water Column Height <br /> DTFP=Depth to Free Product WCV=Water Column Volume(gallons)=WC X WCV Factor <br /> FPT=Free Product Thickness <br />