Laserfiche WebLink
i <br /> August 29,2002 <br /> Job Number: LG02-152 <br /> Page 3 <br /> Table 1. <br /> Summary of Available Ground Water Information. <br /> Date,Source Groundwater Notes A j <br /> Depth 7 <br /> April 29,2002,ten(10)soil borings, Greater than 18 No ground water encountered to a depths <br /> Neil O.Anderson&Associates,Inc. feet. of 18 feet. t!� <br /> Fall 1998, San Joaquin County Flood Control About 65feet in Gradient about 7.7 feet/mile,flowing <br /> and Water Conservation District map.' depth. northwest. (west-northwest) <br /> Spring 1999,San Joaquin County Flood About 70feet in Gradient about 12.5 feet/mile,flowing <br /> Control and Water Conservation District.' depth. northwest. (west-northwest) <br /> Note:ND=Non-Detectable(or not found at detectable limits). <br /> The denth to ground water below the site wac annrnyimntPly Fi5 to 75 TPPt bP4lI7PPn Fall <br /> 1998 and Spring 1999 (see Plates 2 and 3). The ground water flow direction was toward the <br /> northwest with a gradient ranging between 7.7 to 12.5 feet per mile (see Plates 4 and 5). <br /> VI. GEOLOGY, SOIL,AND PERCOLATION TEST <br /> The surficial geologic deposits near the site are reported to be composed of Pleistocene <br /> age(10,000 year to 2 million years ago) Riverbank Formation.' The Riverbank Formation is <br /> widespread in the lower elevations of the Central/Sacramento Valleys and the lower western <br /> Sierran foothills. River alluvium, alluvial terraces, alluvial fans and abandoned channel ridges <br /> compose the majority of the Riverbank Formation.' <br /> `' Wagner,D.L.,Bortugno,E.J.,and McJunkin,R.D., 1990,Geologic Map of the San Francisco-San Jose <br /> Quadrangle. California Department of Conservation,Division of Mines and Geology Map No.5A(Geology). <br /> Scale 1:250,000. <br /> ' Helley,E.J.,and Harwood,D.S., 1985,Geologic Map of the Cenozoic deposits of the Sacramento <br /> Valley and Northern Sierran Foothills,California. U.S.G.S.Misc.Field Studies Map MF-1790,Scale 1:62:500. <br /> 2pE RSO <br /> r 1 <br /> 1 N <br /> Z r <br /> O � <br /> r <br /> �'ES OLS <br />