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' EA—TELLUS DEVELOPMENT CORPORATION Date 12/2/97 <br /> WEST WEBER SITE, STOCKTON Setup time 1230 <br /> QUARTERLY GROUNDWATER SAMPLING Weather Foggy <br /> FIELD NOTES f£RM WEST 2996,00 Samplers DEM/CJH <br /> WELL # MW-2A <br /> HISTORIC CONCENTRATIONS <br /> Location Construction Depth 10 5 ft bgs <br /> Construction 6 inch pvc/ Measured Depth 9 48' <br /> Groundwater Zone Purge Method Grundfos Pump (2") <br /> Screened Interval 3 5-10 5 ft bgs Pump Intake <br />' Sample Method Disposable Bailer Depth to Water 3 50' <br /> Sample Preservation Method Ice Height of Water Column 5 98' <br /> Volume of one casing 8 97 gallons <br /> Purge Start Date 12/2/97 <br /> Purge Start Time 1300 Purge calculations <br /> Discharge Rate —1 gpm 5 98 ft x 1 5 gals / ft x3= <br /> Purge End Time 1325 26 91 gallons <br />' Time Gallons Temp °C pH ECµs/cm Water clarity <br /> 1305 5 1955 1037 868 Clear <br /> 1310 10 1936 1074 883 Clear <br /> 1315 15 1936 1084 894 Clear <br /> 1319 20 1927 1095 908 Clear <br />' 1325 27 1928 1093 928 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 mI 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 Thiosulfate <br />' FIELD OBSERVATIONS(Well condition,repairs needed) <br />' PID readingwhen well ca opened NA Disposal method of purge water Drummed on site <br /> p p <br />' DO readings (mg/1) 3 26,134,0 90,0 67,0 68 Decontarnmabon procedure Alconox/DI Rinse <br /> Redox Measurement(mV) 231,197,177,164,153 <br />' Other notes <br /> Sampler Signature(s) <br />