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CATELLUS DEVELOPMENT CORPORATION Date 5/7/97 <br /> WEST WEBER SITE,STOCKTON Setup time 1000 <br /> QUARTERLY GROUNDWATER SAMPLING Weather Clear <br /> FIELD NOTES I ERM WEST 299600 Samplers DEM/CJH <br /> WELL # MW-3A <br /> HISTORIC CONCENTRATIONS <br /> ' Location Construction Depth 25 ft bgs <br /> Construction 2 inch pvc/ Measured Depth 2143 <br /> ' Groundwater Zone Purge Method Grundfos Pump (2") <br /> Screened Interval 15-25 ft bgs Pump Intake --9 <br /> ' Sample Method Disposable Bailer Depth to Water 4 37 <br /> Sample Preservation Method Ice Height of Water Column 17 06' <br /> Volume of one casing 2 78 gallons <br /> ' Purge Start Date 5/7/97 <br /> Purge Start Time 1012 Purge calculations <br /> Discharge Rate —1 gpm 17 06 ft x 163 gals / ft x 3= <br /> ' Purge End Time 1021 8 34 gallons <br /> ' Time Gallons Temp'C pH ECµs/cm Water clarity <br /> 1016 3 1995 720 1247 Sl Turbid <br /> 1018 6 2014 691 1242 Clear <br /> 1021 9 2018 684 1231 Clear <br /> ANALYSESREQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION? <br />' Fe+2 1030 2 x 40 ml VOA HCL <br /> pH,Conductivity,Chloride 500 ml Poly <br /> Nitrate 500 ml Poly H2SO4 In the Field <br />' Dissolved Methane,Dissolved CO2 2 x 40 ml VOA <br /> BTEX,Tnmethylbenzene,TPHg 4 x 40 ml VOA HCL <br /> TPHd 2 x 1 Liter Amber Glass <br />' Dissolved Mn 500 ml Poly HNO3 In the Field <br /> FIELD OBSERVATIONS(Well condition,repairs needed) <br />' PID reading when well cap opened 0 0 ppm Disposal method of purge water <br /> Drummed onsite <br />' Dissolved Oxygen reading 2 19 mg/l Decontamination procedure Alconox/Dl Rinse <br /> Redox Measurement 102 mV <br /> Other notes <br /> Sampler Signature(s) �� i <br />