SU0013565 - Laserfiche WebLink

Home Browse Search

Shea Homes- Northern California Langston II 4943.009.007 Phase I Environmental Site Assessment 1.4 CURRENT USE OF PROPERTY AND ADJOINING PROPERTIES Currently the Property consists of a relatively level sheet-graded lot. No permanent structures were observed on the Property. Utilities, paved roads, and sidewalks were noted around the Property. Adjacent properties consist of finished residential homes to the north and east, undeveloped graded lots to the south, and residences in the process of being constructed to the west. 1.5 SITE AND VICINITY CHARACTERISTICS According to published topographic maps, the Property ranges in elevation from approximately 110 feet above mean sea level (msl) in the southwest to approximately 95 feet above msl to the northeast. Review of the Wagner 1991 Geologic Map found that the Property is underlain by quaternary-age alluvial fan deposits composed of interlayered sand, silts, and clays. Geocheck— Physical Setting Source Summary of the Environmental Data Resources, Inc. (EDR) report (Appendix A) indicated four Federal United States Geological Survey (USGS) and two State wells located within 1 mile of the Property. Groundwater in the vicinity of the Property was observed between 5 feet and 6 feet below the ground surface. We reviewed the Department of Water Resources On-line Water Data Library for depth to water in the vicinity of the Property. The website identified one well within 1 mile of the Property. The historic depth to groundwater measured in the well ranged from 3.3 to 18 feet below the ground surface. The site-specific depth to groundwater and direction of groundwater flow was not determined as part of this assessment. Fluctuations in groundwater levels may occur seasonally and over a period of years due to variations in precipitation, temperature, irrigation, and other factors. We reviewed the Department of Conservation, Geologic Energy Management(CaIGEM),formerly the Department of Conservation, Division of Oil, Gas, and Geothermal Resources (DOGGR), website and map database to determine if any historic oil and/or gas wells were located within the Property. No wells were mapped within 1 mile of the Property. 2.0 PREVIOUS ENVIRONMENTAL REPORTS Condor Earth Technologies, Inc., Limited Phase II Environmental Site Assessment Report, Proposed Neighborhoods D, K, L, and Town Center, Mountain House and San Joaquin County, California, November 30, 2004. In 2004, Condor Earth Technologies, Inc. (Condor) performed a limited phase II environmental site assessment that included the Property. The assessment was performed to determine if the study area had been impacted due to past agricultural practices. A total of 18 samples were collected for laboratory testing from Neighborhood D, which included the Property and the nearby high school property. The only compounds detected were DDE and DDT at concentrations below land use screening levels. Condor concluded that there was not a potential hazard to public health or the environment to Neighborhood D. ENGEOJuly 2, 2020 Expect Excellence-