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CATELLUS DEVELOPMENT CORPORATION Date 5/6/97 <br /> WEST WEBER SITE,STOCKTON Setup time 1420 <br /> QUARTERLY GROUNDWATER SAMPLING Weather Clear/Windy <br /> FIELD NOTES I ERM WEST 299600 Samplers DEM/CJH <br />' WELL # MW-1 <br /> HISTORIC CONCENTRATIONS <br />' Location Construction Depth 25 ft bgs <br /> Construction 2 inch pvc/ Measured Depth 2147 <br />' Groundwater Zone Purge Method Grundfos Pump (T) <br /> Screened Interval 4-24 ft bgs Pump Intake — 15 <br />' Sample Method Disposable Bader Depth to Water 5 98 <br /> Sample Preservation Method Ice Height of Water Column 15 49' <br /> Volume of one casing 2 52 gallons <br />' Purge Start Date 5/6/97 <br /> Purge Start Time 1432 Purge calculations <br /> Discharge Rate —1 gpm 15 49 ft x 163 gals / ft x 3= <br /> Purge End Time 1441 7 57 gallons <br /> Time Gallons Temp°C pH EC gs/cm Water clanty <br /> 1435 3 2279 721 406 Sl Silty <br /> M1438 6 2228 730 404 Clear <br /> 1441 9 2224 734 413 Clear <br />' ANALYSES REQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION? <br />' Fe+2 1450 2 x 40 ml VOA HCL <br /> pH,Conductivity,Chloride 500 ml 500 ml <br /> Nitrate 500 ml 500 ml H2SO4 In the Field <br /> Dissolved Methane,Dissolved CO2 2 x 40 m] VOA <br />' BTEX,Trimethylbenzene,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 Drummed on site <br /> Dissolved Oxygen reading 0 77 mg/l Decontamination procedure Alconox/DI Rinse <br /> Redox Measurement 49 mV <br /> Other notes <br /> Sampler Signature(s) <br /> LL <br />