Laserfiche WebLink
Kennedy/Jenks Consultants <br /> Table 8 provides a summary of the Facility's water usage based on meter readings recorded <br /> from Production Wells No. 1 and No. 4. Production Well No. 3 does not have a meter for <br /> measuring usage. Production Well No. 4 supplies the majority of the Facility's water needs and <br /> was installed in September 2001, brought into service in November 2002, and became fully <br /> active in January 2003. The meter readings from Well No. 1 are believed to be inaccurate. <br /> Because Well No. 4 provides the majority of the Facility water, the water usage reported for <br /> 2003 is considered to be most representative of Facility water usage. Tables 9 and 10 present <br /> historical analytical data for groundwater samples collected from the production wells. <br /> 4.2.1.1 Production Well Construction Details <br /> Well construction details are not available for Production Well Nos. 1, 2, and 3. Production Well <br /> No. 4 was drilled in 2001 to a depth of 700 feet below ground surface (bgs)but was completed <br /> to 500 feet bgs due to encountering a thick blue clay layer which is most likely the Corcoran <br /> Clay layer. A 16-inch diameter casing was installed with a screened interval from 320 feet bgs to <br /> 440 feet bgs. The depth to static water was recorded as 70 feet bgs. <br /> 4.2.1.2 Groundwater Sampling and Analysis <br /> Tables 9 and 10 present historical analytical data for groundwater samples collected from the <br /> production wells. The constituents presented are: hardness as CaCO3, pH, EC, TDS, total <br /> alkalinity as CaCO3, bicarbonate (HCO3)„calcium, sodium, magnesium, manganese, chloride, <br /> sulfate, and nitrate as N. <br /> Perforated casing depth information is not available for three of the production wells or any of <br /> the irrigation wells. Perforation depths will need to be researched for these production and <br /> irrigation wells in order to identify the water bearing zone for which the water quality data <br /> represents. If the screen lengths are determined to be less than 20 feet, then water quality data <br /> collected from the production and irrigation wells may be compared to water quality data <br /> collected from the monitoring wells or offsite wells. <br /> Groundwater samples from the production and irrigation wells will be analyzed for Nitrate as N, <br /> TKN, TDS, pH, trihalomethanes, and standard minerals including calcium, magnesium, sodium, <br /> chloride, nitrate, sulfate, total alkalinity including the alkalinity series, and hardness, as specified <br /> in the Groundwater Monitoring section of the Revised MRP No. 87-184. <br /> 4.2.2 Monitoring Wells <br /> Woodbridge installed seven (7) groundwater monitoring wells in December 2001 to monitor <br /> groundwater levels and water quality beneath the Facility. The locations of the wells are <br /> depicted in Figure 2. Monitoring well construction logs are provided in Appendix A. The <br /> construction details for the seven monitoring wells can be found in Table 11 and are briefly <br /> summarized below. <br /> 4.2.2.1 Well Construction Details <br /> Monitoring well MW-1 was constructed of 2-inch diameter Schedule 40 PVC with 0.020-inch <br /> slotted screen sections from 16 to 36 feet bgs. The filter pack consists of#3 sand, and a <br /> Groundwater Protection Work Plan, Woodbridge Winery Page 42 <br /> Robert Mondavi, Acampo, California <br /> 9'�ge:.y'x�nenyoh'fi310Ju12d.�mrooUen:bcWarS'wv:�ru4�3.Kcny+rt6�slniea;da <br />