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CAifLLUS DEVELOPMENT CORPOR 77ON Date 12/2/97 <br /> WEST WEBER SITE, STOCKTON Setup time 0815 <br /> QUARTERLY GROUNDWATER SAMPLING Weather Foggy <br /> FIELD NOTES/ERI WEST 2996 Oft Samplers DEM/CJH <br /> WELL # MW-4 <br /> HISTORIC CONCENTRATIONS <br />' Location Construction Depth 15 ft bgs <br /> Construction 2 inch pvc/ Measured Depth 14 79' <br /> Groundwater Zone Purge Method Grundfos Pump(2") <br /> Screened Interval 10-15 ft bgs Pump Intake <br /> Sample Method Disposable Bailer Depth to Water 4 53' <br /> Sample Preservation Method Ice Height of Water Column 10 26' <br /> Volume of one casing 167 gallons <br /> Purge Start Date 12/2/97 <br /> Purge Start Time 0906 Purge calculations <br />' Discharge Rate - 1 gpm 10 26 ft x 163 gals / ft x 3= <br /> Purge End Tune 0914 5 02 gallons <br /> ITime Gallons Temp.°C pH ECµs/cm Water clanty <br /> 908 2 2249 832 571 Clear <br /> 910 4 2410 820 596 Clear <br /> 912 6 2431 <br /> 793 605 Clear <br /> 914 8 2466 780 608 Clear <br />' ANALYSES REQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION? <br /> Fe+ 2 3 x 40 mI VOA HCL <br /> pH, Conductivity,Chloride 500 ml Poly <br />' Nitrate 500 ml Poly <br /> DissoIved Methane,Dissolved CO2 3 x 40 ml VOA <br /> BTEX,Trinethylbenzene,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 reading when well cap opened NA Disposal method of purge water Drummed on site <br />' DO readings (mg/1) 5 51,5 93,4 30,3 18 Decontamination procedure Alconox/DI Rinse <br /> Redox Measurement(mV) 338,307,311,317 <br />' Other notes <br /> Sampler Signature(s)7104 <br /> 177 j4d ICA -10w� <br />