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CATELLUS DEVELOPMENT CORPORATION Date 5/7/97 <br /> WEST WEBER SITE,STOCKTON Set up time 0835 <br /> QUARTERLY GROUNDWATER SAMPLING Weather Clear <br /> FIELD NOTES I ERM WEST 299600 Samplers DEM/CJH <br /> ' WELL # MW-4A <br /> HISTORIC CONCENTRATIONS <br /> ' Location Construction Depth 25 ft bgs <br /> Construction 2 inch pvc/ Measured Depth 2140' <br /> ' Groundwater Zone Purge Method Grund€os Pump(2') <br /> Screened Interval 13-24 5 ft bgs Pump Intake --13' <br /> Sample Method Disposable Bailer Depth to Water 8 45 <br /> Sample Preservation Method Ice Height of Water Column 12 95' <br /> Volume of one casing 2 11 gallons <br /> Purge Start Date 5/7/97 <br /> Purge Start Time 0908 Purge calculations <br /> Discharge Rate —1 gpm 12 95ft x 163 gals / ft x 3= <br />' Purge End Time 0917 6 33 gallons <br />' Time Gallons Temp'C pH EC gs/cm Water clanty <br /> 911 3 1997 806 1614 Turbid <br /> 914 6 2000 740 1600 Clear <br /> 917 9 2004 715 1470 j Clear <br /> ANALYSES_REQUIRED SAMPLE TIME CONTAINER TYPE FILTRATION? <br /> Fe+2 930 2x40 m1 VOA HCL <br /> pH,Conductivity, Chloride 500 ml Poly <br /> Nitrate 500 ml Poly H2SO4 In the Field <br />' Dissolved Methane,Dissolved CO2 2 x 40 ml VOA <br /> BTEX,Tnmethylbenzene,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 <br /> on site <br /> Dissolved Oxygen reading 4 91 mg/1 Decontamination procedure Alconox/DI Rinse <br /> Redox Measurement 101 mV <br /> Other notes <br /> Sampler Signature(s) Fly <br />