FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

Quarterly Monitoring Report- Third Quarter 2015 Page 3 ' OAK RIDGE WINERY WKA No. 6364.08 August 25, 2015 observation files referenced on the California Spatial Reference Center Datum, Epoch 2000.35. The vertical datum used for elevation determination is NAVD88 from GPS observations. ' 4.1 Groundwater Monitoring ' On August 4, 2015, groundwater monitoring and sampling was conducted at Oak Ridge Winery. Monitoring consisted of measuring DTW in each well using an electronic sounder with a tape ' graduated in 1/100th of a foot. DTW was recorded in each monitoring well from the top-of- casing (north side). Groundwater equipotential contours, calculated groundwater elevations in monitoring wells, and apparent direction of groundwater flow on the date of monitoring, are ' illustrated in Figure 3. Table 2 includes DTW and calculated groundwater elevations obtained from this monitoring event as well as historical DTW and groundwater elevations. ' 4.2 Groundwater Sampling ' WKA field personnel collected groundwater samples from each of the four monitoring wells on August 4, 2015. Each well was purged to remove approximately three well casing volumes of ' groundwater, during which time observations of water turbidity and measurements of temperature, pH, and conductivity were recorded. Each well was purged using an electric submersible pump connected to dedicated low-density polyethylene (LDPE) tubing. ' Groundwater samples were collected after the monitoring wells were purged. ' Groundwater samples were collected from disposable weighted bailers at MW1, MW2 MW3, and MW4 into laboratory-preserved, analyte-specific sampling containers provided by the analytical laboratory. Samples were preserved on ice in an ice chest and submitted under ' chain-of-custody documentation to California Laboratory Services, Inc. (CLS) of Rancho Cordova, California (California, State Water Resources Control Board, Division of Drinking Water certified laboratory) for analysis of the following parameters: • Nitrate as nitrogen using EPA method 300.0; ' Total Dissolved Solids (TDS) using method SM2540C; • pH using method SM4500-HB; • Total Kjeldahl Nitrogen (TKN) using method SM4500-NH3C; • Potassium using EPA method 200.7; • Ammonia as nitrogen using method SM4500-NC3C.d; ' Trihalomethanes by EPA Method 524.2 and Standard Minerals (calcium, magnesium, sodium, chloride, sulfate, total alkalinity, and hardness) were also analyzed during the third quarter ' monitoring event.