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May 11-13, 2005CIWMB/LEA Conference1 Closure & Postclosure Maintenance Plans What You Need To Know or Secrets Revealed.

Published byElinor Whitehead Modified over 8 years ago

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Presentation on theme: "May 11-13, 2005CIWMB/LEA Conference1 Closure & Postclosure Maintenance Plans What You Need To Know or Secrets Revealed."— Presentation transcript:

1 May 11-13, 2005CIWMB/LEA Conference1 Closure & Postclosure Maintenance Plans What You Need To Know or Secrets Revealed

2 May 11-13, 2005CIWMB/LEA Conference2 Topics General Overview Special Case – Trickling LFs Permit Interaction General Review Process Specific Review Issues

3 May 11-13, 2005CIWMB/LEA Conference3 Why? Protection of public health and safety and the environment (CIWMB/LEA) Protection of water quality (RWQCB) Legislature Says So CIWMB/LEA - PRC 43500 et seq. RWQCB - WC 13172

4 May 11-13, 2005CIWMB/LEA Conference4 Plan Types Closure Describes closure activities (e.g., final cover, drainage, monitoring systems, etc.) Postclosure Maintenance Describes inspection, maintenance, and monitoring of landfill during PCM period

5 May 11-13, 2005CIWMB/LEA Conference5 Plan Level/Purpose/Due Dates Preliminary Provide basis for cost estimate for C/PCM Conceptual Closure Design With JTD for review, revision, or new SWFP Final Provide cost estimate, plan, schedule for C/PCM Detailed descriptions of activities CEQA compliance required LTP Required 2 years prior to anticipated closure date

6 May 11-13, 2005CIWMB/LEA Conference6 Plan Level/Purpose/Due Dates (2) Partial Final Same as final 2 year submittal not necessary PCM Only After site certified closed Minimum every 5 years w/ permit review

7 May 11-13, 2005CIWMB/LEA Conference7 Topics General Overview Special Case – Trickling LFs Permit Interaction General Review Process Specific Review Issues

8 May 11-13, 2005CIWMB/LEA Conference8 Trickling Standard - 3 Parts Flow Level (i.e., “Trigger”) Long-term Inactive (12 months) Very Low Flow (2 yrs @ <30% of 10 yr average) Criteria Capacity/likelihood to receive additional waste Cannot be to avoid or delay closure implementation Implementation LEA approval with CIWMB concurrence Maintain site in environmentally sound manner SWFP review/revised after approval Burden of Proof - Operator

9 May 11-13, 2005CIWMB/LEA Conference9 Trickling Calculation YearTonnageYearTonnage 1991500019977000 1992510019984600 1993480019993500 1994470020001000 199549002001500 199650002002400 10-year average (minus max and min) = 4700 2-year average (last 2 years) = 450 450/4700 = 9.6% TRICKLING Note 30% of 4700 = 1410

10 May 11-13, 2005CIWMB/LEA Conference10 Trickling Approval Timelines Operator - Request to LEA (>120 days) LEA - Respond w/in 60 days CIWMB - Respond to LEA approval w/in 60 days Effective Feb 2003 Sites in violation as of 2/03 Only 2 sites approved

11 May 11-13, 2005CIWMB/LEA Conference11 Topics General Overview Special Case – Trickling LFs Permit Interaction General Review Process Specific Review Issues

12 May 11-13, 2005CIWMB/LEA Conference12 Permit Action Complete Plans Needed for permit application New, revised, permit review Consistent w/ SMS Needed for SWFP concurrence Effective Feb 03

13 May 11-13, 2005CIWMB/LEA Conference13 SWFP for PCM Effective Feb 03 LFs which did not initiate closure FCPMP incorporated into SWFP Permit revision not necessary at that time SWFP revised to reflect closed LF By time of certification of closure Ministerial action

14 May 11-13, 2005CIWMB/LEA Conference14 Topics General Overview Special Case – Trickling LFs Permit Interaction General Review Process Specific Review Issues

15 May 11-13, 2005CIWMB/LEA Conference15 Review/Approval Process CIWMB coordinates review LEA/RWB case-by-case basis CIWMB/LEA/RWB review for completeness (30-day limit) Agencies review for approvable (120- day limit, includes 30-day completeness time)

16 May 11-13, 2005CIWMB/LEA Conference16 Approval Levels Complete - all areas are addressed although not necessarily adequately (i.e., “in the parking lot”) Consistent w/SMS – all areas are addressed appropriately but not necessarily to an approvable level ( i.e., “in the ballpark”) Approvable - all areas are addressed adequately (i.e., “in the correct seat”) Financial Assurance CEQA/LTP – Final Only

17 May 11-13, 2005CIWMB/LEA Conference17 Here in Parking Lot In the Ball Park Correct Seat in Section 101

18 May 11-13, 2005CIWMB/LEA Conference18 Approval Levels Complete - all areas are addressed although not necessarily adequately (i.e., “in the parking lot”) Consistent w/SMS – all areas are addressed appropriately but not necessarily to an approvable level ( i.e., “in the ballpark”) Approvable - all areas are addressed adequately (i.e., “in the correct seat”) Financial Assurance CEQA/LTP – Final Only

19 May 11-13, 2005CIWMB/LEA Conference19 Review Responsibilities PRC 43506 (b) RWQCB - portions of plans related to protection of the waters of the State LEA/CIWMB - remaining portions of the plans Use JTD Index to determine shared topics

20 May 11-13, 2005CIWMB/LEA Conference20 Shared Responsibility RWQCB – Water Quality CIWMB/LEA – Non Water Quality Cover Design Drainage and Erosion Control Gas Monitoring and Control Postclosure Land Use Slope Stability Construction Quality Assurance

21 May 11-13, 2005CIWMB/LEA Conference21 Responsibility Sole Responsibility RWQCB Ground and Surface Water Monitoring CIWMB/LEA Site Security Structure Removal Gas Monitoring in Structures

22 May 11-13, 2005CIWMB/LEA Conference22 Topics General Overview Special Case – Trickling LFs Permit Interaction General Review Process Specific Review Issues

23 May 11-13, 2005CIWMB/LEA Conference23 Checklists Complete Preliminary Final Adequate/Approvable Preliminary Final On web page

24 May 11-13, 2005CIWMB/LEA Conference24 General Areas Math Engineering Calculations Design Assumptions Cost Estimates

25 May 11-13, 2005CIWMB/LEA Conference25 Cost Estimates Spreadsheet On web page Detailed Not every item needed for every site

26 May 11-13, 2005CIWMB/LEA Conference26 Cost Estimates (2) Closure Everything included If not built yet include in estimate 3 rd party 20% contingency Phased Closure Closure area PLUS open area

27 May 11-13, 2005CIWMB/LEA Conference27 Cost Estimates (3) Postclosure Maintenance Annualized cost x 30 Prorate for frequency <1/yr No pre-discounting (i.e., less in future) Can have options in PCM plan E.g., frequency table Revise estimate at that time Covers entire site – even if phased closure

28 May 11-13, 2005CIWMB/LEA Conference28 Phased Closure

29 May 11-13, 2005CIWMB/LEA Conference29 Gas Monitoring Triple completion if >30 ft At permitted boundary or closer Maximum 1000 ft ALONG perimeter Structure monitoring Control necessary?

30 May 11-13, 2005CIWMB/LEA Conference30 Gas Probe Placement

31 May 11-13, 2005CIWMB/LEA Conference31 Final Cover Minimum 3 ft (ET Covers) Interim Cover ≠ Foundation Layer Can under certain conditions Grading Slopes ≤ 1.75:1 (h:v) Bench – 15 ft wide every 50 ft elevation

32 May 11-13, 2005CIWMB/LEA Conference32 Drainage Design Storm Amount used Return frequency Whence data Old DWR report good but out-of-date Caltrans DWR Local Flood District

33 May 11-13, 2005CIWMB/LEA Conference33 Slope Stability Assumptions used ≥ 3:1 slopes Earthquake area

34 May 11-13, 2005CIWMB/LEA Conference34 Postclosure Land Use Included in Plan Transfer Station IS postclosure land use

35 May 11-13, 2005CIWMB/LEA Conference35 Timelines Reasonable

36 May 11-13, 2005CIWMB/LEA Conference36 Questions???? Michael Wochnick CIWMB - Closure and Technical Services 916-341-6318 mwochnic@ciwmb.ca.gov

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