ARCHIVED REPORTS_1991 - Laserfiche WebLink

Home Browse Search

kn KLEINFELDER 1 EXECUTIVE SUMNL4,RY The Hamey Lane Sanitary Landfill is located in northern San Joaquin County, approximately eight miles east of Lodi, California. The landfill is a Class III disposal site that began operations around 1948 and is expected to be closed by the end of 1991. The landfill received approximately 125,000 tons of waste annually. In 1990, Kleinfelder was retained by the San Joaquin County Public Works Department to prepare a Solid Waste Assessment Test (SWAT) proposal. The proposal was approved by the Central Valley Regional Water Quality Control Board (CVRWQCB) on August 31, 1990. This report contains findings of the Solid Waste Water Quality Assessment Test (SWWQAT) investigation implemented according to the approved SWAT proposal. The name of the investigation has been changed from SWAT to SWWQAT, in 'order to differentiate this investigation from the air quality SWAT(ASWAT). The landfill is located on the east central area of the Great Valley geologic province and is underlain by unconsolidated sediments of the Victor and Laguna Formations. These formations are dominated by interbedded silts clays and sands deposited by streams flowing from the Sierra Nevada. In previous investigations soil samples were collected from the Victor Formation at depths ranging from 15 to 70 feet. Hydraulic conductivities measured in these samples by the laboratory generally ranged from 10-6 to 10-8 cm/sec, with one sandy sample having a hydraulic conductivity of 10-4 cm/sec. These hydraulic conductivities are consistent with those expected in the silts, sandy silts, or silty sands. The ground water wells in the vicinity of the Harney Lane Sanitary Landfill are used mainly for agricultural irrigation and domestic purposes. The average depth of most of the wells is between 200 and 250 feet below ground surface. Regional ground water flows generally to the south. During the SWWQAT investigation, soil samples were collected from the soil/waste interface at the bottom of the primary and secondary landfill sites, from 2 and 10 feet below the interface at each location, and from a background area to assess chemical characteristics of vadose zone and leachate material. Ground water analytical data was ® compiled from quarterly and annual monitoring reports provided by San Joaquin County F19-91-33 Page 1 of 30 Copyright 1991 Kleinfelder, Inc.