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' CATELLUS DEVELOPMENT CORPORATION Date 12/2/97 <br /> WEST WEBER SITE,STOCKTON Setup time 1000 <br />' QUARTERLY GROUNDWATER SAMPLING Weather Foggy <br /> FIELD NOTES/ERM WEST 2996 00 Samplers DEM/CJH <br />' WELL # MW-5 <br /> HISTORIC CONCENTRATIONS <br />' Location Construction Depth 16 ft s b <br /> P g <br /> Construction 2 inch pvc/ Measured Depth 15 92' <br /> Groundwater Zone Purge Method Grundfos Pump(2") <br /> Screened Interval 11-16 ft bgs Pump Intake <br /> tSample Method Disposable Bailer Depth to Water 4 79' <br /> Sample Preservation Method Ice Height of Water Column 1113' <br /> Volume of one casing 181 gallons <br /> Purge Start Date 12/2/97 <br /> Purge Start Time 1014 Purge calculations <br />' Discharge Rate —1 gpm 1113 ft x 163 gals / ft x 3= <br /> Purge End Time 1024 5,14 gallons <br />' Time Gallons Temp°C pH ECµs,/cm Water clarity <br /> 1016 2 2678 852 664 Clear <br /> 1019 4 2396 736 757 Clear <br /> 1021 6 2422 724 776 CIear <br /> 1023 8 2446 718 781 Clear <br />' ANALYSES REQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION? <br /> Fe+2 3 x 40 ml VOA HCL <br /> pH,Conductivity,Chloride 500 ml Poly <br />' Nitrate 500 ml Poly <br /> Dissolved Methane,Dissolved CO2 3 x 40 ml VOA <br /> BTEX,Trimethylbenzene,TPHg 6 x 40 ml VOA HCL <br />' TPHd 2 x 1 Liter Amber Glass <br /> Dissolved Mn 500 ml Poly HNO3 In the Field <br /> Heterotrophic Plate Count 125 ml Plastic Na ThiosulfateIn the Field <br />' FIELD OBSERVATIONS(Well condition,repairs needed) <br />' PID reading when well cap opened NA Disposal method of purge water Drummed on site <br />' DO readings (mg/1) 7 72,4 91,3 27,2 20 Decontamination procedure Alconox/DI Rinse <br /> Redox Measurement(mV) 310,321,275,262 <br />' Other notes <br /> Sampler Signature('S)"O, <br />