ARCHIVED REPORTS_SITE INVESTIGATION 2003 FINAL RPT

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1. Introduction The California Integrated Waste Management Board (CIWMB) Closed, Illegal and Abandoned Site (CIA) program, in accordance with California Public Resources Code (PRC) Section 45013, et seq., investigates CIA disposal sites. The CIA program provides and develops site data and documentation to quantify requirements for both enforcement and potential clean-up activities by the CIWMB Solid Waste Cleanup Program (AB 2136). The scope of enforcement and remediation work that may be conducted by the CIWMB and/or its designated contractor(s), or referral to either the Regional Water Quality Control Board (RWQCB) or the Department of Toxic Substances Control (DTSC), is dependent upon the characterization of the waste located at the site, the results of analysis derived from intrusive or non -intrusive investigation, and determination of the presence or absence of hazardous materials. In February 2001, Mr. Glenn Young, CIA section supervisor, was contacted by Mr. Robert McClellon of the San Joaquin County Local Enforcement Agency (LEA). The LEA requested the CIWMBs assistance in determining the status, and with investigating, and possibly remediating several illegal disposal sites (IDS), and properties collectively referred to in this work plan as the Santa Fe Road Disposal Sites. The Santa Fe Road Disposal Sites includes four properties referred to as the Bill Lane Illegal Disposal Site, the Lynch Illegal Disposal Site, the Beard property, and the McNalley property, which previously were part of, or portions were part of, the former Synder Sanitary Disposal Site (SSDS). During LEA and Code Enforcement inspections, the Bill Lane Illegal Disposal Site (IDS) and Lynch IDS were cited, per applicable San Joaquin County Ordinances, and State Minimum Standards as authorized and pursuant to Public Resource Codes 44100 and 44002 and California Codes of Regulations Titles 14 and 27, for violations of solid waste handling and illegal dumping of waste. Consequently, the LEA took enforcement action, as discussed in this work plan. The purpose of this investigation is to characterize and assess, to the extent possible, the locations and extent of buried wastes at the Santa Fe Road Disposal Sites. This will be accomplished by performing a subsurface investigation that will consist of excavating trenches and drilling borings to evaluate the locations and types of buried wastes and to collect representative samples for analytical testing to characterize the wastes. The information obtained will assist the CIWMB with evaluating potential remedial action alternatives, as necessary, and determining the necessity of additional cover or reconfiguration of the wastes that may be required to protect human health and the environment. 1.1. Site Location and Description The Santa Fe Road Disposal Sites is located north of the City of Riverbank at the southeastern most portion of San Joaquin County (Figures 1 and 2). The site appears on the Escalon and Riverbank United States Geological Survey (USGS) 7.5 -Minute Series Topographic Maps in Township 2 South, Range 9 East, Sections 23 and 24 (Mountain Diablo Base Meridian) (Figure 3). The Santa Fe Road Disposal Sites includes four contiguous properties referred to as the Bill Lane IDS, the Lynch IDS, the Beard property, and the McNalley property. These four properties or portions of, collectively was formally part of the (SSDS) (Figure 4). The following table summarizes the name, address, and solid waste identification system number of the l parcels. 1--4