CORRESPONDENCE_1978-2017 - Laserfiche WebLink

Home Browse Search

L7 Limited Site Assessment Work Plan WINDELER RANCH GLASS DISPOSAL 640 West Mossdale Road, Lathrop, California At the request of Brown Sand, Inc., Advanced GeoEnvironmental, Inc. (AGE) has prepared this Limited Site Assessment Work Plan for the property located at 640 West Mossdale Road, Lathrop, California (the site). The location of the site is illustrated on Figure 1; a plan of the site is illustrated on Figure 2. This workplan is prepared as required by the San Joaquin County Environmental Health Department (EHD) for the procurement of a soil boring permit. The scope of work includes the advancement of four (4) soil probe borings for the collection of grab ground water samples as required by the EHD, by letter dated 31 January 2008. Additionally, the work plan uses the Central Valley Regional Water Quality Control Board document Appendix A -Tri -Regional Board Staff Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites as a guideline. lIT41(l7001 C The site is located in an agricultural field adjacent to the San Joaquin River, in a commercial/agricultural area of un -incorporated San Joaquin County, near Lathrop, California. Sometime around 1908 the San Joaquin River flooded a portion of the site, and gouged out an irregularly shaped hole up to approximately 15 -feet deep. In 1966 the site began operation as a disposal site. It is our understanding that the flood hole was, at that time, used for the disposal of waste glass or "cullet" and related solid wastes resulting from the manufacturing operations of the Libby Owens Plant. Stockpiled waste materials were hauled to the waste site where they were placed into the hole and then covered with approximately 4 -feet of fill soil. Fill soil was obtained from the bottom of the hole by tractor and scraper or dragline. 2.1. REGIONAL GEOLOGIC SETTING The site is located within the northern San Joaquin Valley, which comprises part of the Great Valley geomorphic province of California. The San Joaquin Valley is formed by the Great Valley geosyncline, which is a large, elongate, northwest -trending, asymmetrical structural trough (basin). It 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. This trough 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 greater than 20,000 feet, in the south central portion of the valley. The sedimentary formations vary 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 Advanced GeoEnvironmental, Inc.