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r i i APPLIED SCIENCE AND ENGINEERING, INC. AS Cornsu,rng Scientists and Engineers Grounar rer Investi a tions Civil and Environmental Engineering November 27,200 1949 5th St.Surte 110,Davis,CA 95616 Tel.(530)7562288 Fax(530)756 1648 entail aseaavrs�rather.com Mr. Tim O'Brien Central Valley Regional Water Quality Control Board 3443 Routier Road Sacramento, CA 95827-3003 EASTSIDE WINERY,LODI,SAN JOAQUIN COUNTY GROUNDWATER MONITORING REPORT, THIRD QUARTER,2000 This facility has three monitoring wells adjacent to seepage ponds used for the disposal of winery wastewater. Figure 1 is a sketch map of the disposal pond area showing the three monitoring wells. Quarterly sampling was performed for the first time on 18 August 2000. The depth to water was measured in each well prior to sampling. The measurements are given in Table 1. Table 1. Water Level Elevations Measured in Eastside Winery Monitoring Wells Date MW 1 MW 2 MW 3 RPE: 52.19 RPE: 59.99 RPE: 51.07 XCOOR: -1269.07 XCOOR: -574.60 XCOOR: 0 YCOOR: -590.70 YCOOR: -803.35 YCOOR: 0 18 August 2000 26.31 24.82 39.92 The gradient calculated from these measurements is 0.0169 ft/ft, 190 degrees clockwise from North. The gradient is represented by an arrow on Figure 1. Based on the water level elevations, MW 1 and MW2 contained about 6 gallons of water and MW3 contained about 13 gallons. The wells were sampled with a portable submersible pump(Voss EZ pump) inserted into the top of a disposable bailer. This device is used for purging and sampling. While the well is being purged,water flows into the well,through the disposable bailer,and out through the pump. The pump discharge hose is connected to a flow-through cell in which the pH and Electrical Conductivity are measured. When the purge is complete,the flow rate is reduced to 200 ml/minute for 10 minutes. The sample is taken from the disposable bailer when it is retrieved. A new bailer was used for each well. Measurements recorded during purging are shown in Table 2.