WORK PLANS - Laserfiche WebLink

Home Browse Search

• Work Plan for Groundwater Monitoring Well Installation at the California Army National Guard Stockton Field Maintenance Shop, Stockton, California 1.0 INTRODUCTION Oneida Total Integrated Enterprises (OTIE) is submitting this work plan (Work Plan) to the Central Valley Regional Water Quality Control Board (CVRWQCB) on behalf of the California Army National Guard (CA ARNG), under Contract W91238 -09-D-0017, Delivery Order 0003 with the United States Army Corps of Engineers (USACE) Sacramento District. This Work Plan was prepared pursuant to findings from a 2007 site investigation, which was documented in the Site Investigation Report, Underground Storage Tank (UST) Location at the Field Maintenance Shop (FMS) #24, Stockton, California (SI Report; URS, December 2007). Citing previous work by Versar, Inc. (Versar) and URS, the SI Report presented the following key conclusions: • Soil and groundwater beneath the former diesel and gasoline UST locations at the site have been impacted by the release of contaminants from the former USTs; • The lateral extent of soil and groundwater contamination associated with the former USTs has been delineated to non-detectable levels; • Contamination in groundwater appears to be migrating to the northeast, which was the presumed direction of groundwater flow at the site; and • The vertical extent of contamination has not been investigated below the occurrence of first groundwater, which at the time was approximately 40 to 45 feet below ground surface (bgs). The RI Report recommended the installation of permanent groundwater wells to monitor • groundwater contaminant flow and determine groundwater gradient, and implementation of a quarterly groundwater monitoring program to include laboratory analysis for Total Petroleum Hydrocarbons as Gasoline (TPH-g); TPH as diesel (TPH-d); Volatile Organic Compounds (VOCs) including fuel oxygenates and benzene, toluene, ethylbenzene, and total xylenes (BTEX); and metals. • This Work Plan is presented as follows: • The remainder of Section 1 presents the project objectives and scope, and provides details regarding site location, description and history, and site setting and geology. • Section 2 presents a summary of UST removal activities and previous environmental site investigations. • Section 3 describes proposed field and reporting activities intended to meet the stated project objectives and fulfill the scope of work. • Section 4 provides details regarding project report deliverables. • Section 5 presents a proposed project schedule. • Section 6 details the project Quality Control Plan (QCP). • Section 7 lists references cited in the preparation of this Work Plan. Figures referenced in the text are presented as Appendix A to this document. The Accident Prevention Plan/Site Safety and Health Plan (APP/SSHP) is presented as Appendix B. OTIE