2009 ANNUAL ENGINEERING INSPECTION REPORT

Transcription

1 2009 ANNUAL ENGINEERING INSPECTION REPORT UPPER SOUTHWEST ARKANSAS REGIONAL SOLID WASTE MANAGEMENT DISTRICT CLASS 1 WASTE DISPOSAL AREA Permit No. 265-S1-R1; CSN No PREPARED FOR: UPPER SOUTHWEST ARKANSAS REGIONAL SOLID WASTE MANAGEMENT DISTRICT 319 Landfill Road Nashville, Arkansas (870) PREPARED BY: CIVIL ENGINEERING ASSOCIATES, LLC 2114 East Matthews Avenue Jonesboro, Arkansas (870) MARCH 2010

2 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 PROFESSIONAL ENGINEER S CERTIFICATION As required by Arkansas Regulation 22 (Section ), an inspection of the Upper Southwest Arkansas Regional Solid Waste Management District (USARSWMD) Class 1 Solid Waste Facility was performed by a representative of Civil Engineering Associates, LLC (CEA) on February 5, The purpose of the inspection was to review and document general operating practices and procedures in relation to Arkansas Regulation 22 and the facility s solid waste permit. Based on the inspection, review of the facility operating records, and discussions with the landfill operator, it is my professional opinion that the USARSWMD Class 1 Solid Waste Facility is being operated and maintained in compliance with Arkansas Regulation 22 and the facility s solid waste permit. This opinion and determination are contingent on the fact that all information supplied to the signatory authority, as of the date of this certification is unquestionably accurate and was provided in good faith. This determination also assumes that the condition of the facility and operating practices witnessed on the date of the CEA inspection is representative of operating practices at any time during the reporting period. Lance Powell, P.E. Arkansas P.E. Registration Number Survey Date: February 18, 2010 Inspection Date: February 5, 2010 Certification Date: March 31, 2010 Civil Engineering Associates, LLC i March 2010

3 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 TABLE OF CONTENTS 1.0 INTRODUCTION AND APPLICABILITY (22.423(a)) LANDFILL CAPACITY AND UTILIZATION RATES (22.423(b)) Landfill Utilization Rate (22.423(b)(2)) Capacity and Remaining Life in Prepared Areas (22.423(b)(1)) Remaining Permit Capacity and Life (22.423(b)(2)) PERMIT AND REGULATION 22 COMPLIANCE Compliance of Fill Progression (22.423(b)(3)) Compliance With Regulation 22, Solid Waste Permit Conditions and Operating Plan and Narrative (22.423(b)(4)) Updated Contour Map (22.423(b)(5)) The horizontal and vertical extent of fill areas (22.423(b)(5)(i)) Permitted landfill unit status (22.423(b)(5)(ii)) Survey grid system (22.426(b)(5)(iii)) Location of visable features and landfill improvements (22.426(b)(5)(iv)) Surveyor informatiom (22.426(b)(5)(v)) Leachate Management (22.423(b)(6)) Stormwater Management (22.423(b)(7)) Status of Capping and Closure of Completed Areas (22.423(b)(8)) Status of Remedial and Corrective Actions (22.423(b)(9)) Updated Financial Assurance Documentation(22.423(b)(10)) Revisions to Closure and Post Closure Care Plans (22.423(b)(11)) Other Items Impacting Compliance (22.423(b)(12)) Daily and Intermediate Cover Litter Control Erosion Control Hazardous Waste Exclusion Explosive Gas Monitoring Groundwater Monitoring APPENDICES APPENDIX A APPENDIX B APPENDIX C APPENDIX D APPENDIX E APPENDIX F APPENDIX G Solid Waste Permit Calculations and Site Maps Solid Waste Quarterly Report Forms Leachate Disposal Records and Analytical Testing Closure and Post-Closure Cost Estimates Explosive Gas Monitoring Reports Inspection Photographs Civil Engineering Associates, LLC ii March 2010

4 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 1.0 INTRODUCTION AND APPLICABILITY (22.423(a)) The Upper Southwest Arkansas Regional Solid Waste Management District (USARSWMD) operates a Class 1 Solid Waste Facility on approximately 304 acres located in Howard County, Arkansas. The facility is operated in accordance with Permit No. 265-S1-R1 originally issued by the Arkansas Department of Environmental Quality (ADEQ) on December 18, A copy of the facility permit is included in APPENDIX A. This document constitutes the 2009 Annual Engineering Inspection Report (AEIR) for the facility and addresses the reporting period from January 1, 2009 to December 31, Class 1 landfills are required to submit AEIR s to comply with Section of Arkansas Regulation 22. More specifically, the regulations require the following: Report Requirements A professional engineer registered in the State of Arkansas shall inspect the landfill site at least annually and prepare an annual report addressing operational compliance with permit conditions, permit plans, specifications, narrative and all applicable regulations. The Annual Engineering Inspection Report shall contain at a minimum: (1) The volumetric capacity remaining in the current landfill cell or area and the projected date for opening new cells or areas; (2) The estimated remaining volumetric capacity of all permitted Class 1 landfill units, the landfill capacity (total air space) utilized during the past one year period, and the estimated remaining site life (in years) based upon the utilization rate during the previous one (1) year period; (3) Documentation of compliance of facility fill progression with the approved permit plans, specifications and operating narrative; (4) Documentation of compliance with the operating requirements of this regulation, permit condition, and the approved operating plan and narrative; (5) An updated contour map that depicts: (i) The horizontal and vertical extent of the active and inactive fill (ii) areas; The status of each permitted landfill unit or cell (future unit, active unit, inactive, under construction, under interim cover, undergoing closure, closed, post-closure, etc.); (iii) The survey grid system required by Regulation ; (iv) The location of any other visible surface features or improvements such as roads, fences, buildings, gas control systems, surface water control systems, etcetera; and (v) The person responsible for gathering survey data and the date(s) that survey data was taken to prepare the map. For purposes of annual reports, survey data may be collected by any person familiar with survey techniques, however, a professional land surveyor, registered in the State of Arkansas, shall perform the initial survey of new units Civil Engineering Associates, LLC 1 March 2010

5 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 required under Regulation (i) and final survey of closed units required under Regulation (i). (6) Quantity, location and characteristics of leachate collected, recirculated and disposed; (7) Maintenance of stormwater controls and other best management practices for erosion control; (8) Status of capping and closure of completed areas; (9) Status of remedial or corrective actions taken; (10) Updated Financial Assurance documentation as required in Chapter 14 Financial Assurance Criteria of these regulations. (11) Revised or updated facility Closure Plan in accordance with the requirements contained in Chapter 13 Closure and Post-Closure Care of these regulations. (12) Any other items that affect compliance at the landfill. Mr. Lance Powell of Civil Engineering Associates, LLC (CEA) conducted a field inspection of the facility on February 5, The purpose of the inspection was to review and document landfill operating procedures and practices in relation to the facility s solid waste permit and Arkansas Regulation 22. The following evaluation and information are associated with the reporting period from January 1, 2009 to December 31, Civil Engineering Associates, LLC 2 March 2010

6 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 2.0 LANDFILL CAPACITY AND UTILIZATION RATES The following information provides estimates regarding the average landfill utilization rate during the reporting period. The estimated remaining capacity in prepared areas, as well as the remaining site permitted capacity are also addressed. Based on these computations, estimates regarding the remaining useful life associated with prepared areas as well as the remaining permitted site life are provided. Unless otherwise noted, all volume computations are based on an aerial survey on February 18, 2010 as performed by AMI Engineering, Inc. Related calculations are provided in APPENDIX B. 2.1 LANDFILL UTILIZATION RATE The facility was active and consistently received solid waste during the entire reporting period. Waste reported at the facility for all quarters of the reporting period was weighed on a scale and recorded on the appropriate ADEQ Solid Waste Quarterly Report Forms. Quarterly forms that cover the AEIR reporting period are included in this AEIR as APPENDIX C. Based on the reports provided by the USARSWMD, approximately 83,279 tons of Class 1 solid waste was received at the facility during the reporting period. According to the difference between the most recent aerial survey performed on February 18, 2010 and a previous ground survey performed on July 25, 2008 by Butler & Associates, approximately 165,870 cubic yards of compacted in-place waste was received (including cover soil) at the facility between the survey dates. This corresponds to an average landfill utilization rate of 8,823 cubic yards per month. Calculations regarding the average landfill utilization rate are included in APPENDIX B for reference. It should be noted that the February 18, 2010 aerial survey is the first topographic survey that has been prepared for the entire prepared disposal area in several years. The USARSWMD intends to perform topographical surveys for the entire prepared disposal area on an annual basis from this point forward which will result in more accurate utilization calculations. 2.2 CAPACITY AND REMAINING LIFE IN PREPARED AREAS Section (b)(1) of Arkansas Regulation 22 requires that the volumetric capacity remaining in the current landfill cell or area and the projected date for opening new cells or areas be reported as part of the AEIR. The capacity remaining in all prepared areas was found to be approximately 285,660 cubic yards as of the February 18, 2010 survey date. This corresponds to approximately 300,155 cubic yards remaining as of December 31, 2009 (end of reporting period). Based on an average landfill utilization rate of 8,823 cubic yards per Civil Engineering Associates, LLC 3 March 2010

7 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 month, the currently prepared areas will reach capacity by October The USARSWMD does not plan to construct a new Class 1 landfill cell in REMAINING PERMIT CAPACITY AND LIFE Section (b)(2) of Arkansas Regulation 22 outlines specific reporting requirements pertaining to the capacity and useful life of all permitted waste disposal units. During the reporting period, the facility was operated in accordance with the permitted fill progression. The topographic survey performed on February 18, 2010 shows that waste currently received is being disposed within areas certified and approved for waste disposal. Based on the February 18, 2010 aerial survey and permit design data, the remaining total permitted capacity of the USARSWMD Class 1 Solid Waste Facility as of the survey date is approximately 1,403,910 cubic yards. As previously shown, the average landfill utilization rate calculated for the 2009 reporting period was 8,823 cubic yards per month. Therefore, it was determined that approximately 1,418,105 cubic yards of total permitted airspace was remaining as of the end of the 2009 reporting period. When considering the current monthly utilization rate, the estimated remaining permitted life of the site is approximately 13 years. Civil Engineering Associates, LLC 4 March 2010

8 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 3.0 PERMIT AND REGULATION 22 COMPLIANCE The following information addresses landfill operational compliance in relation to the facility solid waste permit, Arkansas Regulation 22, and the ADEQ approved Operating Plan and Narrative. Unless otherwise noted, compliance was evaluated by the certifying engineer based on the site inspection, survey data, and related documents provided by USARSWMD. 3.1 COMPLIANCE OF FILL PROGRESSION Section (b)(3) of Arkansas Regulation 22 requires that documentation be submitted as part of the facility AEIR to document compliance of facility fill progression with the approved permit plans, specifications, and operating narrative. APENDIX B contains a representative contour map displaying conditions of the facility as they appeared during the February 18, 2010 aerial survey. The contour map provides an overview of the entire site including disposal area contours. The information presented visually in this map was used to verify and evaluate existing landfill compliance with fill progression and operating limits. A comparison of the February 18, 2010 topographical survey to the final permitted contours indicated an isolated area where the landfill is at or near the final grades. The area should be regraded to allow sufficient space for the final cover system. Other areas of the outer final slopes of the landfill have actually been developed at a slope less than the permitted four horizontal to one vertical slope. The development and fill progression of the landfill are generally consistent with the approved plans and operating narrative. 3.2 COMPLIANCE WITH REGULATION 22, PERMIT CONDITIONS AND APPROVED OPERATING PLAN AND NARRATIVE The information addressed in this section is intended to document compliance with Section (b)(4) of Arkansas Regulation 22. Specifically, this section addresses compliance with the operating requirements of Regulation 22, permit conditions, and the approved Operating Plan and Narrative. Inspections performed by the ADEQ Solid Waste Management Division during the 2009 reporting period were reviewed and indicated one satisfactory score, one marginal score, and two unsatisfactory scores. A representative of CEA inspected the USARSWMD facility on February 5, 2010 in order to evaluate the operation of the facility in relation to Arkansas Regulation 22 and applicable permit conditions. Prior to the date of the CEA inspection, the region experienced significant rainfall amounts. Specific operational elements observed in the CEA inspection ( (b)(6-12)) are detailed in Sections 3.3 thru 3.10 of this AEIR. Regulation/permit compliance issues and general observations as noted during the inspection by CEA on February 18, 2010 are as follows: Civil Engineering Associates, LLC 5 March 2010

9 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 1. Blown litter was observed east of the active disposal area adjacent to the future landfill cells, but there did not appear to be any litter leaving the site. Based on a conversation the day of the inspection with the facility Environmental Officer, I understand that litter crews are periodically employed to collect the blown litter. In addition, the Environmental Officer informed me a few days after the inspection that they were in the process of setting up litter fences to control the blowing litter. 2. Leachate seeps were observed along the expansion berm located east of the active disposal area and along the south intermediate slope of Phase 1. The facility Environmental Officer informed me that the leachate seeps have since been repaired. 3. The site was utilizing a large working face the day of the inspection which was likely contributing to the two items noted above. Based on a conversation with the facility Environmental Officer, and as evident the day of the inspection, the site had been experiencing significant amounts of rain which made it difficult to haul sufficient cover material throughout the day, thus resulting in a large working face. Site personnel were informed that they should maintain the smallest working face possible to minimize storm water infiltration, blowing litter, odors, etc. The facility Environmental Officer has indicated that they are in the process of reducing the size of the working face. 4. In general, the outer final slopes of the landfill appeared to have a good layer of intermediate cover with good vegetation established. However, a few significant erosion cuts were noted on the north slope of the landfill that were exposing waste. The facility Environmental Officer informed me in an on February 24, 2010 that the erosion cuts were in the process of being repaired. 5. All access roads appeared to be well maintained with no problems noted. 6. All perimeter storm water drainage ditches were free of sediment the day of the inspection and appeared to be well maintained. 7. An area of ponded leachate was observed the day of the inspection in the southwest corner of the active disposal area but appeared to be contained. The facility Environmental Officer has informed me that the area of the ponded leachate is now properly draining. 8. There are some fairly large areas on top of the landfill that are disturbed and in need of vegetative cover. According to the facility Environmental Officer, the areas that are lacking vegetative cover will be reseeded when weather allows. 3.3 UPDATED CONTOUR MAP In accordance with Section (b)(5) of Arkansas Regulation 22, an updated contour map is included in APPENDIX B of this report. This map is representative of contours and conditions of the USARSWMD facility as they appeared during the February 18, 2010 aerial survey. The contour map provides an overview of the entire facility including disposal area contours. The information presented in this map was used to verify and evaluate existing landfill compliance with fill progression and operating limits. Additionally, the following items are noted as required Horizontal and Vertical Extent of Fill Areas In accordance with Section (b)(5)(i) of Arkansas Regulation 22, the horizontal and vertical extent of the active and inactive fill areas are presented as part of the contour map provided in APPENDIX B. Civil Engineering Associates, LLC 6 March 2010

10 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R Permitted Landfill Status In accordance with Section (b)(5)(ii) of Arkansas Regulation 22, the status of each permitted landfill cell or unit is indicated on the figure provided in APPENDIX B Survey Grid System Section (b)(5)(iii) of Arkansas Regulation 22 outlines specific requirements for the establishment of a site survey grid system to comply with Section of Arkansas Regulation 22. The facility does not currently have a survey grid system. However, the USARSWMD intends to develop a site survey grid system this year and submit it to the ADEQ for approval Location of Visible Features and Landfill Improvements In accordance with Section (b)(5)(iv) of Arkansas Regulation 22, the updated contour map provided in APPENDIX B shows the location of visible surface features or improvements such as roads, fences, buildings, surface water control systems, etc. There were no new improvements or significant changes to existing surface features at the facility during the AEIR reporting period Surveyor Information As outlined in Section (b)(5)(v) of Arkansas Regulation 22, the person responsible for gathering survey data and the dates that survey data was taken must be provided in the AEIR. The person(s) responsible for preparing the most recent aerial survey on February 18, 2010 was Mr. Kelly Vanlandingham of AMI Engineering, Inc. Mr. Vanlandingham is a licensed professional land surveyor in the State of Arkansas. 3.4 LEACHATE MANAGEMENT Leachate derived from the landfill is collected and directed to two large concrete sumps for temporary storage prior to recirculation. The leachate sumps are designed to manage the leachate from all prepared Class 1 areas. APPENDIX D includes leachate quantity records and information as provided by the USARSWMD. As indicated on these records, an estimated 129,523 gallons of leacate was recirculated to the Class 1 facility during the 2009 reporting period. Leachate samples are periodically collected and analyzed as required by the facility s solid waste permit. A copy of the analytical testing performed on leachate samples during the reporting period is included in APPENDIX D. Civil Engineering Associates, LLC 7 March 2010

11 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R1 3.5 STORMWATER MANAGEMENT Section (b)(7) of Arkansas Regulation 22 outlines specific reporting requirements in relation to maintenance of storm water controls and other best management practices for erosion control. The USARSWMD facility s storm water management system for the Class 1 facility consists of one sedimentation basin and a series of storm water control ditches. Storm water from the Class 1 facility area has one permitted NPDES discharge point. The discharge from the facility is sampled and analyzed by a qualified laboratory during a discharge event. Discharge Monitoring Reports are completed monthly and submitted to the ADEQ in accordance with the General Permit. 3.6 STATUS OF CAPPING AND CLOSURE OF COMPLETED AREAS As of the date of this report, there are no areas that have received final cover (certified) and no closure activities have been initiated. In general, inactive areas have received interim cover and vegetation has been established. 3.7 STATUS OF REMEDIAL AND CORRECTIVE ACTIONS As of the date of this report and during the reporting period, no problematic occurrences are known to exist at the site. As such, no remedial and/or corrective action is required or planned. 3.8 UPDATED FINANCIAL ASSURANCE DOCUMENTATION Class 1 landfills are required to prepare estimates regarding the cost to close the facility in accordance with an approved closure plan. In addition, estimates are required regarding the cost to maintain the facility during the 30-year post closure care period. These estimates provide the basis for financial assurance as required by the regulations and are to be updated on an annual basis to consider inflation or changes in design/operation. The cost estimates to establish financial assurance for closure and post closure care of the USARSWMD Class 1 facility have recently been updated and are included in APPENDIX E. The cost estimates are also being submitted to the ADEQ for approval with an updated Closure and Post Closure Care Plan for the facility. An updated financial assurance mechanism for the USARSWMD Class 1 facility will be submitted to the ADEQ upon approval of the Closure and Post Closure Care Plan. 3.9 REVISIONS TO CLOSURE AND POST CLOSURE CARE PLANS In accordance with Section (b)(11), revised or updated facility Closure and Post Closure Care Plans must be addressed as part of the AEIR. As indicated in Section 3.9, the facility Closure and Post Closure Care Plan has recently been updated, including the cost estimates for closure and post closure care, and will be provided to the ADEQ for approval under a submittal separate from this AEIR. Civil Engineering Associates, LLC 8 March 2010

12 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R OTHER ITEMS IMPACTING COMPLIANCE As noted above and as observed by CEA on February 5, 2010, the site appears to be generally well maintained with no major problems noted. CEA is not aware of any current compliance issues with the facility Storm Water Permit Daily and Intermediate Cover As per Arkansas Regulation 22, Class 1 landfills are required to cover the active working face on a daily basis with at least six inches of earthen material or approved alternate cover material. In addition, areas remaining inactive for periods of more than thirty days are required to receive intermediate cover consisting of at least twelve inches of earthen cover. As noted during a site visit by CEA on February 5, 2010, the areas with intermediate cover appeared to be adequately covered but the working face was large and did not appear to be receiving enough cover at the end of each operating day Litter Control Blowing litter was observed during the February 5, 2010 site inspection but did not appear to be leaving the site. Litter control devices are utilized at the site to control the blowing litter and litter crews periodically remove the blown litter from around the site Erosion Control Only two significant erosion reels on the landfill side slopes were noted by CEA during the February 5, 2010 site visit. The facility should continue to periodically inspect and repair all landfill side slopes as necessary and clean the adjacent perimeter ditches as soon as practical Hazardous Waste Exclusion The facility has in place a comprehensive program for excluding hazardous materials at the site. The USARSWMD is required by regulation to make random inspections of incoming waste loads to ensure that unauthorized materials are not accepted. The facility s original permit application has procedures for hazardous waste exclusion and associated random inspections are maintained with the facility permanent operating records Explosive Gas Monitoring Arkansas Regulation 22 requires all Class 1 landfills to conduct explosive gas monitoring for the presence of methane on a quarterly basis. This monitoring is typically performed in subsurface probes at the property boundary and in facility structures or enclosures. Copies of explosive gas monitoring records for the facility are provided in APPENDIX F. As noted on the record forms, no significant levels of methane (i.e. landfill gas) were documented during the 2009 AEIR reporting period. Civil Engineering Associates, LLC 9 March 2010

13 Upper Southwest Arkansas Regional Solid Waste Management District 2009 Annual Engineering Inspection Report Permit No. 265-S1-R Groundwater Monitoring As required by Arkansas Regulation 22 and Permit Condition No.18 (Permit No S1-R1), groundwater monitoring is conducted at the site on a semi-annual basis. All sampling, analysis, statistics, and reporting performed for the facility is conducted in accordance with plans approved by the ADEQ. Groundwater reports, that include statistical analysis of groundwater quality, are prepared and submitted to the ADEQ by Terracon on a semi-annual basis. Civil Engineering Associates, LLC 10 March 2010

14 APPENDIX A SOLID WASTE PERMIT

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24 APPENDIX B CALCULATIONS AND SITE MAPS

25 CALCULATION SUMMARY SHEET PROJECT USARSWMD Class 1 Landfill Annual Engineering Inspection Report CALCULATION TITLE Landfill Utilization and Remaining Capacity Calculations PROJECT NO. SW CALCULATION NO. 1 ORIGINATED BY Lance Powell, P.E. DATE 03/30/10 CHECKED BY Jason MacDonald, P.E. DATE 03/30/10 SUBJECT: Landfill Utilization and Remaining Capacity Estimates Upper Southwest Arkansas Regional Solid Waste Management District Class 1 Solid Waste Disposal Facility SUMMARY: An Aerial photogrammetry survey was performed for the Upper Southwest Arkansas Regional Solid Waste Management District on February 18, 2010 to determine the amount of waste disposal capacity utilized and landfill utilization trends. This information was also utilized to determine the amount of permitted capacity remaining as well as the remaining life in constructed cells or areas. Arkansas Regulation 22 states that all Class 1 Landfills must submit an Annual Engineering Inspection Report which covers general operation and permit compliance for a given calendar year. The report requirements include provisions for calculation of the landfill air space used between surveys as well as computations regarding the remaining permitted waste disposal capacity and useful life in prepared areas. The two most recent survey dates for the landfill were conducted on July 25, 2008 and February 18, These surveys along with the permitted design of the bottom liner and final cover system provide the basis for the enclosed calculations.

26 Landfill Utilization and Remaining Capacity Estimates Upper Southwest Arkansas Regional Solid Waste Management District March 2010 CALCULATIONS: As stated previously, three dimensional digital terrain models were prepared for each of the two survey dates (July 25, 2008 and February 18, 2010). Using Carlson design software, the models were compared to determine the amount of landfill void space used in prepared areas between the survey dates. Air Space Consumed Within Landfill Prepared Area: Fill = 165,872 cubic yards * Note: A bounding polyline was used to define the prepared area and to insure that only cuts and fills in the prepared areas were considered. Time between Survey Dates = 18.8 Months Average Landfill Utilization Rate = (165,872 cubic yards) / (18.8 Months) = 8,823 cubic yards of air space used per month The amount of remaining capacity within prepared areas was determined by using the three dimensional digital terrain model generated for the February 18, 2010 survey date and comparing it with a three dimensional model of the intermediate/final grades associated with all prepared cells. In determining the remaining capacity in prepared areas, a volume of 98,000 cubic yards was subtracted from the calculated capacity to consider the final cover required for the prepared areas. Remaining Capacity in Prepared Areas : Fill = (383,661 98,000) cubic yards = 285,661 cubic yards (As of February 18, 2010) Remaining Life in Prepared Areas = (300,155 cubic yards) / (8,823 cubic yards/month) = 2.8 Years (As of December 31, 2009) The total remaining capacity for all permitted areas was determined by using the three dimensional digital terrain model generated for the February 18, 2010 survey date merged with the base grades (top of protective cover) for the remaining undeveloped cells and comparing it with a three dimensional model of the final permitted grades associated with all permitted cells. In determining the total remaining capacity for all permitted areas, a volume of 193,000 cubic yards was subtracted from the calculated capacity to consider the final cover required for closure of all permitted areas. Remaining Capacity in all Permitted Areas : Fill = (1,597, ,600) cubic yards = 1,403,912 cubic yards (As of February 18, 2010) Remaining Life in Prepared Areas = (1,418,105 cubic yards) / (8,823 cubic yards/month) = 13 Years (As of December 31, 2009)

27 Landfill Utilization and Remaining Capacity Estimates Upper Southwest Arkansas Regional Solid Waste Management District March 2010 SOURCES OF DATA: 1. July 25, 2008 Survey by Butler & Associates 2. February 18, 2010 Survey by AMI Engineering, Inc. 3. USARSWMD Permit Drawings-NRS Consulting Engineers Carlson Survey 2007 INTENDED USE: PRELIMINARY CALC. SUPERCEDES CALC NO. REV NO FINAL CALC. OTHER DESCRIPTION BY DATE CHK DATE

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29 APPENDIX C SOLID WASTE QUARTERLY REPORT FORMS

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34 APPENDIX D LEACHATE DISPOSAL RECORDS AND ANALYTICAL TESTING

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42 APPENDIX E CLOSURE AND POST-CLOSURE COST ESTIMATES

43 CLOSURE COST ESTIMATE FOR FINANCIAL ASSURANCE UPPER SOUTHWEST ARKANSAS REGIONAL SOLID WASTE MANAGEMENT DISTRICT CLASS 1 SOLID WASTE FACILITY PHASE 1 CELLS 1-4 AND PHASE 2 CELLS 1-2 ITEM QUANTITY UNIT UNIT PRICE AMOUNT Surface Preparation 30 ACRES $ $ 9,000 Compacted Clay Cover (18") 72,600 CY $ 3.00 $ 217,800 Synthetic Liner (40 mil VFPE Textured) 1,306,800 SF $ 0.45 $ 588,060 Geocomposite Drainage Layer - 5% Slopes Only 304,920 SF $ 0.50 $ 152,460 Protective Soil Layer (12") 48,400 CY $ 2.50 $ 121,000 Top Soil Layer (6") 24,200 CY $ 2.50 $ 60,500 Installation of Mid-Slope Berms and Let-downs 1 LS $ 50, $ 50,000 Seeding/Fertilizing/Mulching 30.0 AC $ $ 24,000 Erosion Control 1 LS $ 2, $ 2,000 Preparation of Contract Documents 1 LS $ 30, $ 30,000 Quality Assurance/Control 1 LS $ 60, $ 60,000 Surveying 1 LS $ 8, $ 8,000 Certification and Final Report Preparation 1 LS $ 5, $ 5,000 TOTAL $ 1,327,820 Notes: 1. All costs are in year 2010 dollars and should be updated on an annual basis to consider inflation and design changes (if any); 2. The cost estimates are based on the cover system design provided in the facility Closure and Post Closure Care Plan prepared by Civil Engineering Associates, LLC dated February This estimate reflects the costs associated with Phase 1, Cells 1-4 and Phase 2, Cells 1-2 (Approximately 30 Acres). Closure Cost Inflation Adjustment Year Implicit Price Deflator for Gross Domestic Product Adjusted Closure Cost Estimate

44 POST CLOSURE CARE COST ESTIMATE FOR FINANCIAL ASSURANCE UPPER SOUTHWEST ARKANSAS REGIONAL SOLID WASTE MANAGEMENT DISTRICT CLASS 1 SOLID WASTE FACILITY YEARS 1-30 AFTER FINAL CLOSURE MISC. REPAIRS (SUBSIDENCE, SETTLING, EROSION, ROADS, ETC.) ITEM QUANTITY UNIT UNIT PRICE AMOUNT Labor (2 people x 8 hr/day x 2 days/yr) 32 Hours $ $ 480 Equipment - Dozer 16 Hours $ $ 1,600 - Dump Truck 16 Hours $ $ Loader 16 Hours $ $ 1,040 Misc. Materials and Services 1 LS $ 5, $ 5,000 TOTAL MISC. REPAIRS $ 9,080 MAINTAIN & OPERATE LEACHATE COLLECTION SYSTEM ITEM QUANTITY UNIT UNIT PRICE AMOUNT Capital Cost of System ($100,000; Estimated Life = 10 years) Annual Maintenace and Repair (1/10 of Capital Cost) $ 10,000 Leachate Pumping/Storage (Electrical Power) 10,000 gal $ 0.01 $ 100 Annual Transportation Costs 10,000 gal $ 0.04 $ 400 Annual Treatment Costs 10,000 gal $ 0.03 $ 300 TOTAL LEACHATE SYSTEM O&M $ 10,800 MAINTAIN & OPERATE GROUNDWATER MONITORING SYSTEM ITEM # WELLS UNIT COST/WELL AMOUNT Capital Cost (9 wells at $4,000 = $36,000; Assume 30 year life Annual Maintenance and Repair (1/30 of Capital Cost) $ 1,200 Annual Sampling Cost (2/year) 9 Wells $ $ 6,750 Annual Laboratory Analysis (2/year)+QA/QC 9 Wells $ 1, $ 9,900 Statistical Analysis (2/year) 9 Wells $ $ 5,850 TOTAL ANNUAL GW MONITORING SYSTEM COSTS $ 23, MAINTAIN & OPERATE GAS MONITORING SYSTEM ITEM # PROBES UNIT COST/PROBE AMOUNT Capital Cost of System (9 probes at $780 = $7,020; Assume 30 year life) Annual Maintenace and Repair (1/30 of Capital Cost) $ 234 Sampling/Analysis Costs (4/year) 9 Probes $ $ 3,600 TOTAL GAS MONITORING O&M $ 3,834 TOTAL ANNUAL POST-CLOSURE CARE COST FOR PERIOD: $ 47,414 TOTAL ESTIMATED POST-CLOSURE CARE COSTS FOR 30 - YEAR PERIOD: $ 1,422,420 Post Closure Cost Inflation Adjustment Year Implicit Price Deflator Adjusted Closure Cost Estimate

45 APPENDIX F EXPLOSIVE GAS MONITORING REPORTS

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50 APPENDIX G INSPECTION PHOTOGRAPHS

51 2009 USARSWMD AEIR CLASS 1 LANDFILL ACTIVE DISPOSAL AREA PHASE 2 CELL2 FEBRUARY 5, USARSWMD AEIR CLASS 1 LANDFILL PHASE 1 SOUTHERN INTERMEDIATE SLOPE FEBRUARY 5, 2010

52 2009 USARSWMD AEIR CLASS 1 LANDFILL NORTH SLOPE OF PHASE 1 AREA FEBRUARY 5, USARSWMD AEIR CLASS 1 LANDFILL WEST SLOPE OF PHASE 1 & PHASE 2 AREA FEBRUARY 5, 2010

53 2009 USARSWMD AEIR CLASS 1 LANDFILL NORTH STORM WATER DITCH OF PHASE 1 AREA FEBRUARY 5, USARSWMD AEIR CLASS 1 LANDFILL EROSION CUT ON NORTH SLOPE OF PHASE 1 AREA FEBRUARY 5, 2010