Laserfiche WebLink
GRANITE CONSTRUCTION — FRENCH CAMP Page 2 <br /> WKA No . 2088 . 09 <br /> October 10, 2005 <br /> Site Description <br /> The site comprises approximately 20 acres located easterly of Harlan Road, south of French <br /> Camp, California. Granite, Construction Company owns and operates an asphalt batch plant at <br /> this location. The site consists of an office, shop area, fuel storage areas, asphalt batch plant and <br /> scales . The majority of the site is covered with asphalt. The easterly portion of the site contains <br /> an asphalt batch plant; the western portion is occupied by a construction maintenance facility and <br /> offices (Plate 2) . The site and surrounding areas are relatively flat; surface elevation on site is <br /> approximately 18 feet above sea level. The site is bounded to the north and south by open fields, <br /> to the west by Harlan Road and Interstate 5 ; and to the east by a Southern Pacific Railroad <br /> easement. The surrounding area consists primarily of commercial and light industrial properties <br /> with single-family residential areas extending east of the site. <br /> Physiographic and Hydrogeologic Setting <br /> The site is located in the central portion of the Great Valley geomorphic province of California. <br /> The Great Valley is bounded by the mountains and foothills of the Sierra Nevada Range to the <br /> east and the California Coast Ranges to the west. The Geologic formations of the Great Valley <br /> are typified by thick sequences of alluvial sediments deposited during the filling of a large <br /> ancient basin. The 1985 United States Geological Survey (USGS) "Geologic Map of the Late <br /> Cenozoic Deposits of the Sacramento Valley and Northern Sierra Foothills, California, " shows <br /> the site to be underlain by Holocene age basin deposits. These deposits consist primarily of fine- <br /> grained silt and clay. These conditions are consistent with those encountered during our drilling <br /> investigations. Specifically, subsurface soils at the site primarily consisted of silty fine sands to a <br /> depth of approximately 5 feet underlain by clayey silts with lenses of silty sands to the bottom of <br /> the borings. <br /> The site lies within the San Joaquin River Ground Water Basin (California Department of Water <br /> Resources, 1986) . Measurements taken during our previous field investigations and quarterly <br /> monitoring events revealed groundwater depths ranging from 24 to 31 feet below ground surface <br /> NNK <br /> wa4LrcE q KUHL <br /> - - & ASSOCIATES INC. <br />