revised final closure plan - Salinas Valley Solid Waste Authority

Revised Final Closure Plan July 2010
Crazy Horse Sanitary Landfill -1- 103-97133
1.0 INTRODUCTION
1.1 Background
The Crazy Horse Sanitary Landfill (CHLF) is a 160-acre site, located in northern Monterey County,
approximately five miles directly northeast of Salinas, and approximately two miles east of
Prunedale. Site access is from Crazy Horse Canyon Road off State Highway 101, as shown in Figure
1, Site Location Map.
The CHLF is a Class III landfill and began operation in 1934. Salinas Valley Solid Waste SVSWA
(SVSWA) is the owner of the landfill and is responsible for the landfill operation. The current
General Manager is Patrick Mathews [(831) 775-3000]. When the landfill was active, the SVSWA
contracted landfill operations to Norcal Waste Systems. Information concerning the landfill
regulatory and operating history can be found in Section 1.1.3 of the Report of Waste Discharge/
Report of Disposal Site Information submitted as Volume 1 of the Joint Technical Document, Crazy
Horse Sanitary Landfill, Monterey County, California, EMCON/OWT, July 2004 (JTD (Vol. 1)).
The CHLF can generally be separated into two areas, the closed Module 1 area and the once active
area. The closed Module 1 area consists of a 6-acre unlined area, located in the southeastern portion
of the property, as shown on Figure 2. The once active fill area is approximately 66 acres and
consists of the top deck, the south slope, and the equipment parking area as referenced on Figure 2.
The once active fill area includes both lined and unlined disposal areas. Landfill disposal areas
developed after October 9, 1993 were constructed with a composite liner system in accordance with
Title 27 of the California Code of Regulations (CCR).
A small closure area, referred to as the Plescia property, was located southeast of the closed Module
1. This site contained a septic tank that registered in the environmental health risk accounting
associated with the National Priorities Listing of the Module 1 area. Recent discussions with the
Federal Environmental Protection Agency (USEPA) and the Regional Water Quality Control Board
(RWQCB) have removed this site from association with closure of the Crazy Horse Sanitary Landfill
hence is not discussed within this report. Details on field investigations and those findings for the
Plescia property were reported to the RWQCB on June 17, 2008. The report was attached as
Appendix J in the 2008 Second Semi-Annual Groundwater Monitoring Report.
The landfill operates in accordance with Solid Waste Facility Permit (SWFP) 27-AA-0007, issued on
March 25, 2005, by the County of Monterey Environmental Health Division, the local enforcement
agency (LEA) for the landfill. The landfill also operates in accordance with Waste Discharge
Requirements (WDRs) contained in Order No. R3-2007-0003, which was adopted on February 9,
2007. Copies of the revised SWFP and WDRs are included in Appendix A of the JTD (Vol. 1).
In the JTD (Vol. 1), the SVSWA proposed a vertical expansion, increasing the maximum landfill
elevation from 605 feet above mean sea level (amsl) to 635 feet amsl. A Final Closure and
Postclosure Maintenance Plan (FCPCMP, 2004) was prepared in 2004 (Emcon/OWT, 2004b) in
conjunction with the JTD (Vol. 1) reflective of that vertical expansion.
In 2009, the SVSWA prepared the Revised Final Closure and Postclosure Maintenance Plan
(FCPCMP) which revised the 2004 FCPCMP. The 2009 FCPCMP was subsequently approved by
Department of Resources Recycling and Recovery (CalRecycle), the RWQCB, and the LEA. The
2009 RFCPCMP prepared the CHLF for closure in its final condition as non-irrigated open space.
Golder Associates