Laserfiche WebLink
REGIONAL GEOGRAPHIC SETTING <br /> The property is situated in a primarily residential area of the <br /> City of Stockton, approximately midway between Interstate I-5 to <br /> the west & Highway 99 to the east City Hall & County Government <br /> buildings are about 1 1/2 miles to the south, and the University <br /> of the Pacific is a short distance to the northwest <br /> GEOLOGIC & GEOMORPHIC PROVINCE <br /> The site is located near the southern end of the Sacramento <br /> Valley, a sub-province of what is known as the Great Valley of <br /> California The Sacramento Valley is composed of in excess of <br /> 25, 000 feet of sediments derived from erosion and uplift of the <br /> Sierra Nevada Batholith to the east The sediments range in age <br /> from Recent to Cretaceous & possibly older, and consist of sands, <br /> gravels, silts, & clays produced by repeated reworking of the <br /> outwash from the Sierras <br /> Relief is very flat, less than 5 ' /mile, with drainage to the <br /> southeast towards the Sacramento-Stockton Delta area The <br /> Calaveras River is about one mile to the north-northeast, and <br /> • Mormon Slough is roughly 2 miles to the south <br /> SOIL CLASSIFICATION. <br /> According to the 1952 publication issued by the University of <br /> California, Berkley, the soil is this area is known as Stockton <br /> Adobe Clay It is a dark grey to brown alluvial soil derived as <br /> outwash from bask igneous sources, (ie, the Sierra Nevada Bath- <br /> olith ) It is considered to have imperfect drainage, having <br /> hardpan subsoil layers generally underlain with unconsolidated <br /> material The Storie Index, 28, gives it a classification as <br /> poor <br /> DEPTH TO GROUNDWATER: <br /> Based upon the sprang 1993 water table map issued by the San <br /> Joaquin County Flood Control District, groundwater was measured <br /> at between 60 , & 70 ' bgl in this area Based upon published <br /> data, the highest water level in the last 10 years was measured <br /> at about 27 ' bgl . Groundwater was located at about 53 ' below <br /> grade during purging & sampling operations conducted in October, <br /> 1994 Groundwater measurements during quarterly sampling in <br /> October, 1995, showed an average depth of 46 93 ' below grade <br /> PRIOR USE OF REMOVED UST' S . <br /> • The site had been the location of a gasoline station for many <br /> 2 <br />