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CATELLUS DEVELOPMENT CORPORATION Date 12/2/97 <br /> WEST WEBER SITT,STOCKTON Setup time 1410 <br /> QUARTERLY GROUNDWATER SAMPLING Weather foggy <br /> FIELD NOTESJERM WEST 2996.00 Samplers DEM/CJH <br /> 1 WELL # MW-1A <br /> HISTORIC CONCENTRATIONS <br />' Location Construction Depth 15 ft bgs <br /> Construction 2 inch pvc/ Measured Depth 13 92' <br />' Groundwater Zone Purge Method Grundfos Pump(2") <br /> Screened Interval 4 5-14 5 ft bgs Pump Intake <br /> Sample Method Disposable Bailer Depth to Water 4 25' <br /> Sample Preservation Method Ice Height of Water Column 9 67' <br /> Volume of one casing 158 gallons <br /> Purge Start Date 12/2/97 <br /> Purge Start Time 1422 Purge calculations <br /> tDischarge Rate —1 gpm 9 67 ft x 163 gals / ft x 3= <br /> Purge End Time 1427 4 73 gallons <br /> Time Gallons Temp °C pH EC ps/cm Water clarity <br /> 1423 1 1985 832 1160 Clear <br /> 1424 2 2096 870 1165 Clear <br /> 1425 3 2191 892 1199 Clear <br /> 1426 4 2252 890 1283 Clear <br /> 1427 5 2288 873 1324 Clear <br />' ANALYSES REQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION7. <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 />' <br /> TPI-Id 2 x 1 Liter Amber Glass <br /> Dissolved Mn 500 in] Poly HNO3 In the Field <br /> Heterotrophic Plate Count 125 ml Plastic a 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) 139,0 77,0 75,113,0 96 Decontamination procedure Alconox/DI Rinse <br /> Redox Measurement(mV) 209,210,214,218,224 <br />' Other notes <br /> Sampler Signature(s) <br /> 1 <br />