Laserfiche WebLink
\.. ..� <br /> `. Dama, Inc. March 31, 2004 <br /> B94301.01 Page 4 <br /> Soils <br /> According to the Soil Survey of San Joaquin County, California compiled by the US Soil <br /> Conservation Service,native soil in the vicinity of the Site is Jacktone-Urban land complex, 0-2 % <br /> slopes. This nearly level map unit is found in basins. The Jacktone soil is moderately deep to a <br /> hardpan and is somewhat poorly drained. It is found in alluvium derived from mixed rock sources. <br /> Permeability is slow in the Jacktone soil. Available water capacity is moderate. The shrink-swell <br /> ` potential is high. Runoff is slow and the hazard of water erosion is slight. <br /> Hydrogeology <br /> Sediments containing fresh groundwater in the San Joaquin Valley are largely unconsolidated silts <br /> ` and sands derived from river channel,flood plain,and alluvial fan deposits ofPliocene to Recent age <br /> (Davis and others, 1959). The depth of first encountered groundwater underlying the Site has not <br /> been assessed. However, according to groundwater studies conducted for an investigation of a <br /> ` leaking underground storage tank facility located less than one-quarter mile east of the Site, <br /> groundwater has been found from 30 to 50 feet below grade, and flow trends east-southeast. The <br /> nearest major surface water is the Mosher Slough,at more than one-half mile distance from the Site. <br /> This water course trends to the west. <br /> 3.0 INFORMATION FROM THE SITE RECONNAISSANCE <br /> The objective of the Site reconnaissance was to observe the Site for specific indicators of <br /> environmental concern. The methodologyused during the Site reconnaissance included a systematic <br /> search of practically accessible areas of the Site and adjacent properties. A Site location map is <br /> presented as Drawing 1 in Appendix A, and a Site Plan depicting the Site, adjoining property use, <br /> ` and observed on-Site features is presented as Drawing 2 in Appendix A. Additionally,photographs <br /> were taken during the Site walk and selected photographs of the Site are presented in Appendix B. <br /> ` Twining's Site reconnaissance was conducted on March 17, 2004,by Mr.William Cooper and Mr. <br /> Tim Thomas Twining-environmental assessors. There were no significant 'talions encountered <br /> at the time of Twining's Site reconnaissance with the exception of the following: Access to the <br /> interior of the residence at 1301 W. Joan Avenue was not provided; the majority of the portion of <br /> the Site at 1248 W.Hammer Lane was covered with overgrown weeds and grasses;and observations <br /> of the interior of the garages/workshops was obscured due to poor lighting, a metal flooring and <br /> �. clutter from personal items.The findings of the Site reconnaissance are summarized in the following <br /> sections. <br /> k. 3.1 Site Reconnaissance-Description of Structures, Roads, & Other Site Improvements <br /> There is one main residential structure,three garages/workshops,three shacks,two domestic wells, <br /> and aseptic system located on the 1301 W.Joan Avenue property. The residence is a slab-on-grade, <br /> wood frame, single story structure, of approximately 2,000 square feet in area. The residence is <br /> located on the southwestern portion of the Site and can be accessed from W. Joan Avenue to the <br /> ` south. The garage/workshops are constructed of wood and corrugated tin and are built over soil <br /> V <br />