WORK PLANS - Laserfiche WebLink

Home Browse Search

Kennedy/Jenks Consu tents 2.2.1 Solis The US Natural Resources Conservation Service (NRCS)San Joaquin County Soil Survey maps indicate that most of the facility is underlain by either the Devries Sandy Loam or Guard Clay Loam. The NRCS describes these soil series as generally poorly drained, moderately coarse-textured and moderately fine-textured soils that are moderately deep to a cemented hardpan or are very deep, and that have been drained in most areas. These soils, which are distributed over an area much larger than the facility, formed in alluvium derived from mixed rock sources. Both soils are subject to rare flooding (USDA 1992). The monitoring well construction logs for onsite wells generally indicate the subsurface consists of a mixture of silty or clayey layers, although well-graded sand was encountered in well GW-6 from about 11 feet bgs to the total depth of the boring. Poorly graded sand was reported for much of the screened interval in well GW-9, with lesser thicknesses reported in wells GW-10, GW-11, GW-12, GW-15, and GWA 8. Well construction logs do not indicate the existence of hardpan layers (Condor 2002). In many of the soil borings drilled by Kennedy/Jenks, the upper 8 to 9 feet consisted of silty sand, and in borings KB-4 and KB-6 the entire 10 feet of the boring consisted of silty or well- graded sand. The clay and silt soils logged in the soil borings were very stiff to stiff and typically had low to no plasticity. Although some soils were very stiff to stiff, no cemented 'hardpans' were observed (Kennedy/Jenks 2008). 2.2.2 Hydrogeology In the soil borings, the first-encountered groundwater was typically observed at the base of the silty sand just above a deeper clay or silt layer. Groundwater was also observed in the clay and silt layers if sand was absent. The stabilized groundwater levels in the monitoring wells indicate that the shallow aquifer is unconfined. 2.2.2.1 Groundwater Gradient Groundwater monitoring data indicate that the groundwater flow direction in the western portion of the site is generally from east to west. Groundwater flow direction in the eastern portion of the site appears to be influenced by pumping from nearby water supply wells. The groundwater gradient magnitude based on the elevations referenced to the relative datum is typically around 0.0005 feet per foot. The small gradient magnitude is a function of the proximity to the Delta and the flat local topography. 2.2.2.2 Facility Groundwater Quality Condor has monitored the groundwater quality at the facility on behalf of Sutter Home since 2002. The TDS concentration data indicate some variability which is difficult to attribute to specific activities. However, the onsite TDS concentrations are consistent with those measured in wells throughout the region. Monitoring Well Replacement Work Plan Page 3 Sutter Home Winery, Lodi, California gas cupWaanJc4aM'OBfi500.5.15_sftwMnnsT0 eaorlsVnw install wpltaxtdoc