revised final closure plan - Salinas Valley Solid Waste Authority

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Revised Final Closure Plan July 2010 Crazy Horse Sanitary Landfill -3- 103-97133 2. Allows the SVSWA to prepare an estimate of closure and postclosure maintenance costs for the landfill. 3. Enables the LEA, CIWMB and RWQCB to assess the reasonableness of the cost estimate. Section 2 of this report presents the final closure plan for the landfill, which identifies and describes tasks involved in closing the landfill in a manner consistent with applicable regulations and acceptable standards to protect public health and safety, and the environment. The contents of this final closure plan are consistent with the requirements of 27 CCR 21769 and 21800, and other applicable sections of Title 27. Site monitoring and maintenance information and descriptions of tasks for implementing the postclosure maintenance activities are provided separately in the Revised Final Post-Closure Maintenance Plan (RFPCMP). The closure cost estimates consistent with the requirements of 27 CCR 21820 are presented in Section 3. Golder Associates
Revised Final Closure Plan July 2010 Crazy Horse Sanitary Landfill -4- 103-97133 2.0 CLOSURE PLAN 2.1 Site Location 27 CCR 21790(b)(2) The Crazy Horse Sanitary Landfill (CHLF) is located in northern Monterey County, approximately nine miles north of the City of Salinas at 350 Crazy Horse Canyon Road (ref. Figure 1). Access to the site is from Crazy Horse Canyon Road, a paved two-lane road which runs southeasterly from U.S. Highway 101 to the road intersection at San Juan Grade Road. The landfill is approximately one mile south of U.S. Highway 101. The CHLF is located in Sections 14 and 15, Township 13 South, Range 3 East, Mount Diablo Baseline and Meridian. The entire CHLF (existing landfill areas and associated facilities) is located within these quadrangles. The longitude and latitude of the landfill is latitude 36.81 o N, longitude 121.62 o W. The current Assessor Parcel Numbers for the site are 125-271-063, 125-491-012, and 125-571-058. 2.2 Landfill Topography 27 CCR 21790(2) and 21142 Current Topography. The current site topography of the CHLF is presented on Figure 2. This topography is based in part on a survey that was performed in August 2009. WDR Order No. R3- 2007-0003 specified the site would cease landfill operations by April 30, 2009. The RWQCB subsequently granted a one year extension to this closure date, or April 2010. However, Condition 17f of the Solid Waste Facility Permit (SWFP) allows site operation only until December 31, 2009, which therefore served as the controlling date for final cessation of site operation. On March 4, 2010, CalRecycle approved the 2009 FCPCMP and the project is currently in ‘closing’ status until the closure construction is complete. Final Grading Topography. The final grades for the CHLF are presented on Figure 4. Cross sections of this topography are presented on Figure 12. Sideslopes for the closed CHLF will typically be no steeper than 3H:1V (horizontal to vertical) as shown on Figure 3. However, there are two general areas where final cover slopes are approaching 2H:1V. Refuse fill placement on the southeastern slope above the entrance area and Landfill Gas to Energy Plant (LFGTE Plant) was built as steep as 2.2H:1V as shown on Figure 4 to conserve fill space in the final lifts at the site. Beginning in 2008, fill along this slope was placed at 3H:1V to finish grade. The southern slope down to the toe of the landfill has three general areas steeper than 3H:1V. Slope No. 5 as shown on Figure 4 was constructed to slopes of 2.3H:1V during final operations at the site. There are two areas on Slope No. 2 that are steep as 2.5H:1V. 2.3 Maximum Closure Area 27 CCR 21790(b)(6) Approximately 72 acres of the Crazy Horse Sanitary Landfill is permitted for waste disposal. To date, only Module 1, an approximately 6-acre area, has been closed, which occurred in 1989. Therefore, the maximum closure area is the remainder of the landfill footprint. At this stage, the total Golder Associates
Page 1 and 2: REVISED FINAL CLOSURE PLAN (2010) C
Page 3 and 4: Revised Final Closure Plan July 201
Page 9: Revised Final Closure Plan July 201
Page 41 and 42: TABLES Table 1 - CalRecycles Final
Page 43 and 44: Initial Closure Final Cover Phase I
Page 45 and 46: This figure was originally produced
Page 47 and 48: CRAZY HORSE CANYON ROAD CRAZY HORSE
Page 49 and 50: A - 1 - - TYPICAL ARRAY SECTION LEG
Page 51 and 52: ID Task Name Duration Start Finish
Page 53 and 54: LEGEND NOTES REVISED FINAL CLOSURE
Page 55 and 56: LEGEND A-55 SW-1 NOTES REVISED FINA
Page 57 and 58: LEGEND E A-15 NOTES REVISED FINAL C
Page 59 and 60: NE SW A 4 12 LANDFILL CROSS SECTION
Page 61 and 62:
LEGEND NOTES J 14 14 OVERSIDE DRAIN
Page 63 and 64:
1 16 16 2B 16 16 2A 16 16 U 4 16 MA
Page 65:
V 18 18 NOTES V 18 18 MODULE 1 FINA
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revised final closure plan - Salinas Valley Solid Waste Authority

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