COMPLIANCE INFO_PRE 2019 - Laserfiche WebLink

Home Browse Search

15 September 2003 AGE-NC Project No. 03-1064 Page 2 of 6 Building 2511 HF Hawley Chemical Corporation in 1966. The Polk city directory listed the HF Hawley Chemical Corporation at the 2511 North West Lane address in 1966; however, a previous AGE investigation in the site area placed the HF Hawley Chemical Corporation at 3909 North West Lane during this same time period. The listing of HF Hawley Chemical Corporation at the site address may be an error. Hobart Manufacturing Corporation from the early 1970s until the early 1990s. In addition to building usage, public records show that three, separate septic systems were installed on the property in 1952, 1961 and 1963 (Figure 2); the approximate locations of the septic systems are based on un-scaled site septic system diagrams (Appendix A) reviewed at the SJCEHD. 2.1. REGIONAL GEOLOGIC/HYDROGEOLOGIC SETTING The site is situated within the southern portion of the Great Valley Geomorphic Province of California, a large, elongate, northwest trending, asymmetric structural trough; the northern and southern portions of the Province have been designated the Sacramento and San Joaquin Valleys, The Province is bordered by the Coast Ranges to the west, the Klamath Mountains and Cascade Range to the north, and the Sierra Nevada to the east. The Great Valley has been filled with sediments derived from both marine and continental sources. Thickness of the sedimentary fill ranges from thin veneers along the valley edges to more than 20,000 feet in the south central portion of the valley. The sedimentary formations range in age from Jurassic to Recent, with the older deposits being primarily marine in origin and the younger deposits being primarily continental. Continental-derived sediments were primarily deposited in lacustrine, fluvial, and alluvial environments with sediment sources being the mountain ranges surrounding the valley (Olmsted and Davis, 1961); the site itself is located on unconsolidated and semi-consolidated alluvium, lake, playa and terrace deposits of Quaternary age (California Division of Mines and Geology, 1977). Rocks composing the basement complex of the Province have not been completely defined but are believed to be metamorphic and igneous in origin. The Modesto, Riverbank and Turlock Lake Formations and overlying Recent alluvium are the principal sources of domestic ground water in the 13,500-square mile San Joaquin Valley Ground Water Basin (Basin 5-22). Based on ground water monitoring data at a site north of the Mock property (American Moulding and Millwork Company at 2801 North West Lane), ground water occurs at approximately 35 feet below surface grade in March 1999, and was flowing toward the northeast (Dames & Moore, 1999). The Dames & Moore report shows the historical local ground Advanced GeoEnvironmental, Inc.