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HomeMy WebLinkAbout0105_CoblesCDLF_PermitRenewal-LOS_App_FID1320279_ 20190503Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 PERMIT RENEWAL - GENERAL REPORT COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01 -05 1 Chao, Ming-tai From:Kemppinen, Hannu <HKemppinen@LaBellaPC.com> Sent:Friday, May 03, 2019 4:09 PM To:Chao, Ming-tai Cc:Brenda Coble; Davis, Amy; Joyce, Leonard Subject:[External] 01-05 05032019 CDLF 5-yr Permit Renewal-LOS Attachments:01-05 CDLF 05022019 (5-yr Permit Renewal-LOS).pdf CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc.gov Ming-Tai, In the attached you will find 5-year permit application for the Coble’s Sandrock C&D LF in Alamance County, NC. LaBella Associates has compiled information for the 5-year permit renewal and Life of Site application in accordance with Sections .0207 and .0500 rules. On behalf of Coble’s Sandrock, Inc. we are pleased to provide you with this permit application. However, this application does not contain some information required for the permit renewal, and we will work with the Cobles to finalize documents as they become available. The application includes the following sections: I-General II-Facility Plan III-Operations Plan IV-CQA Plan V-Closure & Post Closure Care Plan VI-Water Quality Monitoring Plan VII-LFG Monitoring Plan Engineering Plan was not included because no changes to the Plan have been proposed. Incomplete Items of this application are the following: Signed Franchise Agreement pending (Revised agreement is included in the Facility Plan Appendix), Current site survey pending (Facility and Operations Plans drawings are dated 2008), Partial LF closure update and submittal pending closure construction completion and survey, Phase 3B construction on-going, pending completion, CQA report submittal, and PTO, and Closure & post closure costs are based on currently open/closed areas. Future phases opening/closing costs will be adjusted as they come available. We kindly ask of you to review these submitted documents and provide your comments. LaBella will prepare responses to comments (RTC) and prepare a final submittal provided with engineer’s seal. Hannu Kemppinen, PG LaBella Associates | Senior Project Manager 336-790-2252 direct 336-323-0092 office 336-209-7156 mobile 2211 West Meadowview Road, Suite 101 Greensboro, NC 27407 labellapc.com | Your Joyce Engineering Team Under a New Name ________________________________________________________________________ I - General 1 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina I. GENERAL This report was prepared on behalf of Coble’s Sandrock in accordance with the North Carolina Solid Waste Management Rules, 15A NCAC 13B, Sections .207 and .500. The intent is to demonstrate compliance with the applicable permit application requirements therein so that a permit renewal for Life of Site may be issued for the Coble’s Sandrock Construction and Demolition Landfill. The C&D Landfill is owned and operated by Kent and Brenda Coble. The facility is currently operating under North Carolina Solid Waste Permit No. 01-05. The site was originally permitted for operation in September 30, 1998. DENR Solid Waste Section issued Permit to Continued Operate for Phase 1 & 2 in February 2009. Permit to Construct Phases 3A & 3B expansion was issued on January 30, 2009. Joyce Engineering submitted Letter of Notification for Partial Closure of Phases 1 & 2 in April 2010. Permit to Operate Phases 2 and 3A was issued in April 2011 with Permit for Construction Phase 3B expansion. Five-year operation permit for Phases 2 and 3A and Permit to Construction was issued on February 2016. Coble Sandrock is conducting active landfilling in the Phase 3A, while excavating and selling sandrock from the Phase 3B footprint. Permit condition in Attachment 2 notes that the Permit to Construct (PTC) shall expire August 8, 2017 , eighteen (18) months from the issuance date of the permit according to Rule 15A NCAC 13B .0534(b)(2)(H) if the initial or substantial construction authorized in the permit does not begin within 18 months from the issuance date of the permit, then the permittee must obtain a permit modification from the Section prior to construction, comply with the conditions of the approval and submit a permit modification fee. Substantial construction includes, but is not limited to, issuance of construction contracts, mobilization of equipment on site, and construction activities including installation of sedimentation and erosion control structures. A Modification to the Permit to Construct for the facility will be required in accordance with rules in effect at the time of review of the request and shall be subject to a permit modification fee according to NCGS 130A-295.8. Coble’s has been excavating the 3B footprint since the issue for PTC in April 2011. The mining has been slow process due to annual demand for the sandrock, but the 3B area is under construction for the landfill expansion. PERMITTING HISTORY Permit Type Date Issued Doc ID No. (DIN) Original Issue September 30, 1998 5987 Permit Modification 1 (Area Certifications) April 4, 2000 5987 Permit Modification 2 (Area Certifications) August 29, 2000 5987 Permit Modification 3 (1.15 acre Addition) January 24, 2002 5987 Permit to Construct (PTC) for the Phase 2 Ei May 20, 2003 5987 PTC for the Phases 3A & 3B Expansion January 30, 2009 4918 ________________________________________________________________________ I - General 2 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina Permit to Operate (PTO) for the Phases 1 and 2, Continued February 23, 2009 6889 PTC for Phase 3B and PTO for Phases 2 & 3A April 29, 2011 13652 Administratively Modified PTO Consisting of Address correction page 1; Elimination of Attachment 3, Condition 21 referring to leachate collection; and Restoration of Part V conditions relating to material recovery. January 20, 2012 15921 PTC for Phase 3B and PTO for Phases 2 & 3A, Continued a 5-yr Operation. February 8, 2016 25405 In addition to disposing of C&D waste in an unlined landfill, various waste recovery and processing activities are carried out at the site. These include a land clearing and inert debris (LCID) disposal area, temporary storage and grinding of wood waste, collection of recyclable metal materials, collection rubble concrete and asphalt shingles for off- site recycling or disposal, and dismantling phased out mobile home units. Facilities such as a scale house and maintenance building are also located on the site. According to the annual facility report for FY2018, 14,887 tons of solid waste was received at the C&D landfill. Of this total 70.86 tons was cardboard, 1,513 tons of metal, 421 tons of concrete/rubble/asphalt, and 471 of wood waste. Total recycled content was 2,476 tons and landfilled 12,411 tons. This permit renewal application intends to provide information to allow the Solid Waste Section to reissue a five-year permit to continue operate and for the Life of Site. This permit renewal contains only the following Sections that have been revised: I – General Section Narrative; II - Facility Plan V - Operations Plan VI - Closure and Post-Closure Care Plan and their cost estimates; VII - Water Quality Monitoring Plan VIII - Landfill Gas Monitoring Plan Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 FACILITY PLAN COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01-05 may 2019 Project no. 2191087 II - Facility Plan Labella Associates, PC. C&D LF 5-Year Permit Renewal/LOS May 2019 Coble Sandrock, North Carolina 1 TABLE OF CONTENTS FACILITY PLAN .................................................................................................................................1 1. Waste Stream ......................................................................................................................2 2. Landfill Capacity ..................................................................................................................3 3. Special Engineering Features ............................................................................................4 4. Partial Closure of the Landfill .............................................................................................5 FIGURES Site Location Map TABLES Table 1 Future Tonnage Projection DRAWINGS Drawing FP-01 Facility Plan – Site Development Drawing EP-04 Engineering Plan - Phased Grading Drawing EP-05 Engineering Plan - Phased Grading Drawing FP-02 Facility Plan – Final Contours APPENDICES Appendix I Franchise Agreement FACILITY PLAN This facility plan defines the development of the Coble’s Sandrock C&D landfill property and describes the permit of an existing facility. This plan includes narrative and drawings, which present the long-term, general design concepts related to construction, operation, and closure of the C&DLF unit(s). Additional solid waste management activities located at the C&DLF facility must be identified in the plan and must meet the requirements of the SWMP .0537 Subchapter. The facility plan defines the waste stream proposed for management at the C&DLF facility. If different types of landfill units or non-disposal activities are included in the facility design, this plan must describe general waste acceptance procedures. The areal limits of the C&DLF unit(s), total capacity of the C&DLF unit(s), and the proposed waste stream must be consistent with the Division's approval set forth in accordance with Rule .0536 (a)(1). Original Facility and Engineering Plans Drawings (FP-01, FP-02 and EP-04, EP-05) provide the information required in Section .0537(d). II - Facility Plan Labella Associates, PC. C&D LF 5-Year Permit Renewal/LOS May 2019 Coble Sandrock, North Carolina 2 1. Waste Stream Types of Waste Specified for Disposal: Only construction/demolition debris will be accepted at the C&D landfill, and only land clearing/inert debris (LCID) will be accepted in permitted LCID areas. Construction and demolition debris defined in NC General Statutes is waste or debris resulting solely from construction, remodeling, repair, or the demolition of pavement, buildings, or other structures. LCID waste is generated from land clearing activities. Service Area: The Alamance County Franchise Agreement, provided in Appendix I, limits the service area to be served by the Coble’s Sandrock Landfill to customers within 25 miles from the site. Existing customers outside the 25-mile service limitation are grandfathered under the Franchise Agreement and Coble's Sandrock may continue to accept wastes from these customers. Coble's Sandrock may also accept waste from new customers outside the 25-mile service area to replace existing customers outside the service area; however, first priority in terms of disposal capacity is to be given to waste generated within Alamance County. The Counties from which the facility has previously taken waste include Alamance, Cabarrus, Caswell, Chatham, Davidson, Forsyth, Green, Guilford, Lee, Orange, Randolph, Rockingham, and Wake. Alamance County recognizes that the Coble Sandrock C&D landfill currently accepts waste from customers outside the 25-mile radius, and these existing customers are grandfathered under the Franchise Agreement. New customers outside the 25-mile radius may be accepted to replace the existing customers in accordance with Section 4 of the Franchise Agreement. Segregation Management Procedures: Recyclable material will be segregated from the waste stream and temporarily stored in containers or stockpiles prior to removal from the site. Recyclable material may include wood, metals, concrete, plastic, cardboard, and other materials with appropriate recycling markets. Scrap metal is removed from the site frequently and taken to D.H. Griffin Wrecking Co. Inc. Cardboard is stored in a 40-yard container that is removed from the site by Federal Paper Board when full. Coble’s Sandrock deconstructs mobile trailer homes at the working face of the C&D landfill. Identified C&D waste material removed from the deconstruction process is placed into the landfill. The franchise agreement requires monitoring waste and to reject any significant levels of asbestos. The locations of the mobile trailer home deconstruction area and the recyclables storage areas follow the location of the working face as it progresses across the landfill. Equipment: Coble Sandrock proposes to operate the following equipment at the C&D landfill: • CAT 330 CL • CAT 973 Loader • CAT 330 CL • TREMAC Shear Muncher • LayMor Sweeper II - Facility Plan Labella Associates, PC. C&D LF 5-Year Permit Renewal/LOS May 2019 Coble Sandrock, North Carolina 3 • Process Generator • CAT Rubber Tire Loader • Massimo UTV • Precision Husky Tub Grinder • PowerScreen Screener • Trex Off Road Truck • NPK Hammer • Kenworth Road tractor • 60 yard metal container • Ford F800 Fuel Truck • International Work Truck • CAT D8 Dozer • TRex Off Road Truck • CAT 973 Loader • Link Belt Trackhoe • TRex Pan • TRex Pan Equipment may be added or deleted, depending condition to upgrade and on the volume of waste accepted. 2. Landfill Capacity Overall Facility Life The available airspace for waste, operational cover soil and intermediate cover material for the entire facility is 6,935,903 cy. Assuming that 10% of that volume will be soil, 6,242,313 cy are available for waste material. If an in-place waste density of 1050 lbs/cy is used, the remaining tonnage capacity of the landfill is 3,277,214 tons. The in-place waste density stated above is within the typical range of densities measured for C&D debris. Based on the historical record from 1999 to 2018, Coble’s Sandrock landfilled an average of 34,512 tons per year. Using this historical average, the remaining capacity calculates approximately 48,536 cy or one year of life in the permitted Phases 1-3A. Subsequently, Phase 3B is under construction and utilizing its added capacity the full date would be 2026 (34,512 tons/yr). The Franchise Agreement for Coble’s Sandrock limits the waste acceptance rate to 600 tons per day or approximately 180,000 tons a year. Projecting the facility’s life with the franchise agreement volume, the entire landfill permitted Phases 1-8 volume would be consumed by 2035. Phase 3B has been permitted for construction (PTC) and is under construction at the time of this five-year renewal application. Future phases 4-8 are approved for development and require permits to construct and operate. II - Facility Plan Labella Associates, PC. C&D LF 5-Year Permit Renewal/LOS May 2019 Coble Sandrock, North Carolina 4 Overall Facility Soil Balance The base grading plan, including access roads, for the entire remaining facility yields a net 1,537,784 cy of cut. Approximately 325,871 cy of soil will be needed for final cap (3 feet thick) construction. Assuming 10% of the volume will be soil material, 693,590 cy of soil will be needed for intermediate cover material. Subtracting the estimated soil requirements from the calculated available cut material leaves an excess of 518,323 cy of soil. Soil borings and closure construction completed over the years on the site and the laboratory testing results indicate that the near-surface soils have hydraulic conductivity in the order of 1x10-7 cm/sec, and are therefore suitable for use as cover material. Phase 3B To evaluate the air space requirement for a 5-year phase, assuming an average of past 5- year tonnage of 12,368 tons/year the projected total tonnage for the next 5-year phase is 61,840 tons. Assuming an in-place waste density of 1050 lbs per cubic yard, the required air space for waste next 5-year phase is 117,790 cubic yards. In addition, assuming that a 6-inch lift of cover soil will be placed on the working face once per week, an additional 10% (11,779 cubic yards) of air space is required. Therefore, the total air space required, not including the intermediate or final cap is 129,569 cubic yards. Phase 3B permitted gross capacity is 349,213 cu. 3B is currently under construction and the work is anticipated to be complete by mid-year at which time the Construction documents will be submitted to the Section for review and issuance for Permit to Operate. 3. Special Engineering Features Containment and Environmental Control Systems Cap System: The cap system is described from bottom to top in the following paragraphs. Infiltration Barrier: An infiltration barrier will consist of an 18-inch low-permeability soil layer compacted to achieve a hydraulic conductivity no greater than 1 x 10-5 cm/sec. The 18-inch low permeability soil barrier may be replaced with a geosynthetic clay layer (GCL), as discussed in the Engineering Plan of this report. The low-permeability soil barrier, or the GCL, will lie directly above an intermediate soil cover layer of at least 12 inches in thickness. Erosion Control Components (Protective Layer and Erosion Layer): A protective layer consisting of at least 18 inches of local soil will be placed on top of the infiltration barrier. The erosion and protective layers will not be heavily compacted so that vegetative growth will be promoted. Soil tests will be conducted prior to seeding to determine if amendments to the soil are needed to establish a healthy stand of vegetation. II - Facility Plan Labella Associates, PC. C&D LF 5-Year Permit Renewal/LOS May 2019 Coble Sandrock, North Carolina 5 Vegetative Cover: After placement of the erosion layer, the area that has been closed will be seeded with a grass mixture. Mulch and erosion control matting will be used as needed to further minimize erosion. Leachate Management Systems: Leachate collection and management systems are not designed or permitted for this construction and demolition unlined waste disposal facility. Base Liner Systems: The base of the landfill is excavated to designed base grades and remaining native soil will serve as the base of the landfill, with the condition that the upper two feet of the base soils consist of the following soil types: SC, SM, ML, CL, MH, or CH (according to Unified Soil Classification System). Gas Management System: Passive gas vents will be installed to a minimum depth of 10-feet in the waste mass at a frequency of one vent per acre. 4. Partial Closure of the Landfill The west side of the landfill Phases 1 and 2 were closed in 2012-2013 and the CQA report was submitted to the Section in August 2013. Coble has continued partial closure in the north end of the landfill during 2014 and 2016. Areas marked on the closure map as 12 and 13 both piggyback on the Phase 1 east side slopes, encompass approximately 3.6 acres. The closure CQA report is submitted to the Section under separate cover. END FIGURE TABLE COBLE SANDROCK C&D LF Annual  Report Tons  Received Waste in Place  (tons) Air Space  Consumed  Annual (CY)   Air Space  Consumed  Cumulative  (CY) Survey Date UF  (tn/cy) Density  (lbs/cy) Remaining  Capacity each  Phase (CY) Remaining  Capcity Entire  Facility (CY) 1998 1999 14,111.32      14,111.32          2000 40,488.38      54,599.70          2001 99,225.55      153,825.25        2002 79,035.85      232,861.10        2003 78,328.36      311,189.46        2004 57,962.06      369,151.52        2005 57,855.27      427,006.79        2006 55,849.02      482,855.81        2007 49,981.45      532,837.26        2008 40,428.22      573,265.48        51,905 736,000 5/30/2008 0.78 1558 6,199,903       2009 14,488.29      587,753.77        844,632 6,091,271       2010 12,769.32      600,523.09        18,156 853,861 6/8/2010 0.70 1407 6,082,042       2011 10,104.71      610,627.80        2012 8,428.04         619,055.84        2013 9,352.22         628,408.06        2014 11,046.38      639,454.44        16,558 958,539 6/13/2014 0.67 1334 297,424          5,977,364       2015 9,954.39         649,408.83        15,201 991,714 7/15/2015 0.65 1310 264,249          5,944,189       2016 14,891.36      664,300.19        30,281 1,021,995 6/28/2016 0.49 984 233,968          5,913,908       2017 13,539.15      677,839.34        30,316 1,052,311 7/25/2017 0.45 893 203,652          5,883,592       2018 12,411.09      690,250.43        23,640 1,075,951 6/21/2018 0.53 1050 180,012          5,859,952       2019 34,512.52   724,762.95        65,738 1,141,689 0.53 1050 114,274          5,794,214       2020 34,512.52   759,275.47        65,738 1,207,427 0.53 1050 48,536            5,728,476       Phase 3A 2021 34,512.52   793,787.99        65,738 1,273,166 0.53 1050 332,010          5,662,737      1,255,963 2022 34,512.52   828,300.52        65,738 1,338,904 0.53 1050 266,272          5,596,999       2023 34,512.52   862,813.04        65,738 1,404,642 0.53 1050 200,534          5,531,261       2024 34,512.52   897,325.56        65,738 1,470,380 0.53 1050 134,796          5,465,523       2025 34,512.52   931,838.08        65,738 1,536,118 0.53 1050 69,058            5,399,785       2026 34,512.52   966,350.60        65,738 1,601,856 0.53 1050 3,320              5,334,047      Phase 3B 2027 34,512.52   1,000,863.12    65,738 1,667,594 0.53 1050 980,827          5,268,309      1,605,176 2028 34,512.52   1,035,375.65    65,738 1,733,333 0.53 1050 915,088          5,202,570       2029 34,512.52   1,069,888.17    65,738 1,799,071 0.53 1050 849,350          5,136,832       2030 34,512.52   1,104,400.69    65,738 1,864,809 0.53 1050 783,612          5,071,094       2031 34,512.52   1,138,913.21    65,738 1,930,547 0.53 1050 717,874          5,005,356       2032 34,512.52   1,173,425.73    65,738 1,996,285 0.53 1050 652,136          4,939,618       2033 34,512.52   1,207,938.25    65,738 2,062,023 0.53 1050 586,398          4,873,880       2034 34,512.52   1,242,450.77    65,738 2,127,761 0.53 1050 520,660          4,808,142       2035 34,512.52   1,276,963.30    65,738 2,193,499 0.53 1050 454,922          4,742,404       2036 34,512.52   1,311,475.82    65,738 2,259,238 0.53 1050 389,183          4,676,665       2037 34,512.52   1,345,988.34    65,738 2,324,976 0.53 1050 323,445          4,610,927       2038 34,512.52   1,380,500.86    65,738 2,390,714 0.53 1050 257,707          4,545,189       2039 34,512.52   1,415,013.38    65,738 2,456,452 0.53 1050 191,969          4,479,451       2040 34,512.52   1,449,525.90    65,738 2,522,190 0.53 1050 126,231          4,413,713       2041 34,512.52   1,484,038.42    65,738 2,587,928 0.53 1050 60,493            4,347,975      Phase 4 2042 34,512.52   1,518,550.95    65,738 2,653,666 0.53 1050 885,330          4,282,237      2,648,421 2043 34,512.52   1,553,063.47    65,738 2,719,405 0.53 1050 819,591          4,216,498       2044 34,512.52   1,587,575.99    65,738 2,785,143 0.53 1050 753,853          4,150,760       2045 34,512.52   1,622,088.51    65,738 2,850,881 0.53 1050 688,115          4,085,022       2046 34,512.52   1,656,601.03    65,738 2,916,619 0.53 1050 622,377          4,019,284       2047 34,512.52   1,691,113.55    65,738 2,982,357 0.53 1050 556,639          3,953,546       2048 34,512.52   1,725,626.08    65,738 3,048,095 0.53 1050 490,901          3,887,808       2049 34,512.52   1,760,138.60    65,738 3,113,833 0.53 1050 425,163          3,822,070       2050 34,512.52   1,794,651.12    65,738 3,179,572 0.53 1050 359,424          3,756,331       2051 34,512.52   1,829,163.64    65,738 3,245,310 0.53 1050 293,686          3,690,593       2052 34,512.52   1,863,676.16    65,738 3,311,048 0.53 1050 227,948          3,624,855       2053 34,512.52   1,898,188.68    65,738 3,376,786 0.53 1050 162,210          3,559,117       2054 34,512.52   1,932,701.20    65,738 3,442,524 0.53 1050 96,472            3,493,379       2055 34,512.52   1,967,213.73    65,738 3,508,262 0.53 1050 30,734            3,427,641      Phase 5 TABLE 1 ‐ FUTURE TONNAGE PROJECTION Annual  Report Tons  Received Waste in Place  (tons) Air Space  Consumed  Annual (CY)   Air Space  Consumed  Cumulative  (CY) Survey Date UF  (tn/cy) Density  (lbs/cy) Remaining  Capacity each  Phase (CY) Remaining  Capcity Entire  Facility (CY) 2056 34,512.52   2,001,726.25    65,738 3,574,000 0.53 1050 982,796          3,361,903      3,538,996 2057 34,512.52   2,036,238.77    65,738 3,639,738 0.53 1050 917,058          3,296,165       2058 34,512.52   2,070,751.29    65,738 3,705,477 0.53 1050 851,319          3,230,426       2059 34,512.52   2,105,263.81    65,738 3,771,215 0.53 1050 785,581          3,164,688       2060 34,512.52   2,139,776.33    65,738 3,836,953 0.53 1050 719,843          3,098,950       2061 34,512.52   2,174,288.85    65,738 3,902,691 0.53 1050 654,105          3,033,212       2062 34,512.52   2,208,801.38    65,738 3,968,429 0.53 1050 588,367          2,967,474       2063 34,512.52   2,243,313.90    65,738 4,034,167 0.53 1050 522,629          2,901,736       2064 34,512.52   2,277,826.42    65,738 4,099,905 0.53 1050 456,891          2,835,998       2065 34,512.52   2,312,338.94    65,738 4,165,644 0.53 1050 391,152          2,770,259       2066 34,512.52   2,346,851.46    65,738 4,231,382 0.53 1050 325,414          2,704,521       2067 34,512.52   2,381,363.98    65,738 4,297,120 0.53 1050 259,676          2,638,783       2068 34,512.52   2,415,876.51    65,738 4,362,858 0.53 1050 193,938          2,573,045       2069 34,512.52   2,450,389.03    65,738 4,428,596 0.53 1050 128,200          2,507,307       2070 34,512.52   2,484,901.55    65,738 4,494,334 0.53 1050 62,462            2,441,569      Phase 6 2071 34,512.52   2,519,414.07    65,738 4,560,072 0.53 1050 874,576          2,375,831      4,556,796 2072 34,512.52   2,553,926.59    65,738 4,625,811 0.53 1050 808,837          2,310,092       2073 34,512.52   2,588,439.11    65,738 4,691,549 0.53 1050 743,099          2,244,354       2074 34,512.52   2,622,951.63    65,738 4,757,287 0.53 1050 677,361          2,178,616       2075 34,512.52   2,657,464.16    65,738 4,823,025 0.53 1050 611,623          2,112,878       2076 34,512.52   2,691,976.68    65,738 4,888,763 0.53 1050 545,885          2,047,140       2077 34,512.52   2,726,489.20    65,738 4,954,501 0.53 1050 480,147          1,981,402       2078 34,512.52   2,761,001.72    65,738 5,020,239 0.53 1050 414,409          1,915,664       2079 34,512.52   2,795,514.24    65,738 5,085,977 0.53 1050 348,671          1,849,926       2080 34,512.52   2,830,026.76    65,738 5,151,716 0.53 1050 282,932          1,784,187       2081 34,512.52   2,864,539.28    65,738 5,217,454 0.53 1050 217,194          1,718,449       2082 34,512.52   2,899,051.81    65,738 5,283,192 0.53 1050 151,456          1,652,711       2083 34,512.52   2,933,564.33    65,738 5,348,930 0.53 1050 85,718            1,586,973       2084 34,512.52   2,968,076.85    65,738 5,414,668 0.53 1050 19,980            1,521,235      Phase 7 2085 34,512.52   3,002,589.37    65,738 5,480,406 0.53 1050 1,455,497       1,455,497      5,434,648 2086 34,512.52   3,037,101.89    65,738 5,546,144 0.53 1050 1,389,759       1,389,759       2087 34,512.52   3,071,614.41    65,738 5,611,883 0.53 1050 1,324,020       1,324,020       2088 34,512.52   3,106,126.94    65,738 5,677,621 0.53 1050 1,258,282       1,258,282       2089 34,512.52   3,140,639.46    65,738 5,743,359 0.53 1050 1,192,544       1,192,544       2090 34,512.52   3,175,151.98    65,738 5,809,097 0.53 1050 1,126,806       1,126,806       2091 34,512.52   3,209,664.50    65,738 5,874,835 0.53 1050 1,061,068       1,061,068       2092 34,512.52   3,244,177.02    65,738 5,940,573 0.53 1050 995,330          995,330          2093 34,512.52   3,278,689.54    65,738 6,006,311 0.53 1050 929,592          929,592          2094 34,512.52   3,313,202.06    65,738 6,072,050 0.53 1050 863,853          863,853          2095 34,512.52   3,347,714.59    65,738 6,137,788 0.53 1050 798,115          798,115          2096 34,512.52   3,382,227.11    65,738 6,203,526 0.53 1050 732,377          732,377          2097 34,512.52   3,416,739.63    65,738 6,269,264 0.53 1050 666,639          666,639          2098 34,512.52   3,451,252.15    65,738 6,335,002 0.53 1050 600,901          600,901          2099 34,512.52   3,485,764.67    65,738 6,400,740 0.53 1050 535,163          535,163          2100 34,512.52   3,520,277.19    65,738 6,466,478 0.53 1050 469,425          469,425          2101 34,512.52   3,554,789.71    65,738 6,532,216 0.53 1050 403,687          403,687          2102 34,512.52   3,589,302.24    65,738 6,597,955 0.53 1050 337,948          337,948          2103 34,512.52   3,623,814.76    65,738 6,663,693 0.53 1050 272,210          272,210          2104 34,512.52   3,658,327.28    65,738 6,729,431 0.53 1050 206,472          206,472          2105 34,512.52   3,692,839.80    65,738 6,795,169 0.53 1050 140,734          140,734          2106 34,512.52   3,727,352.32    65,738 6,860,907 0.53 1050 74,996            74,996             2107 34,512.52   3,761,864.84    65,738 6,926,645 0.53 1050 9,258              9,258              Phase 8 2108 34,512.52   3,796,377.36    65,738 6,992,383 0.53 1050 (56,480)          6,935,903 2109 34,512.52   3,830,889.89    65,738 7,058,122 0.53 1050 (122,219)         2110 34,512.52   3,865,402.41    65,738 7,123,860 0.53 1050 (187,957)         Note: Table is based on annual average tonnage of 34,512.52 landfilled from 1999 thru 2018. Cumulative volume includes weekly cover soil. Utilization factor 0.53 is representative for the industry . DRAWINGS APPENDIX 1 ORDINANCE GRANTING A CONSTRUCTION AND DEMOLITION DEBRIS LANDFILL FRANCHISE TO COBLE'S SANDROCK, INC. WHEREAS, the Board of Commissioners enacted the Alamance County Landfill Franchise Ordinance on December 5, 1994; and WHEREAS, North Carolina General Statutes § 153A-136(a)(3) authorizes counties to regulate the disposal and other disposition of solid wastes by granting franchises to one or more persons for the exclusive right to commercially dispose of solid wastes within the county; and WHEREAS, the Board of Commissioners enacted an initial Ordinance Granting a Construction and Demolition Debris Landfill Franchise to Coble's Sandrock, Inc. on September 2, 1997, and then enacted subsequent Ordinances Granting a Construction and Demolition Debris Landfill Franchise to Coble's Sandrock, Inc. on September 4, 2001 with an effective date of September 2, 2002, and on August 1, 2005 with an effective date of September 2, 2007; and on August 6, 2012 with an effective date of September 2, 2012; and WHEREAS, the August 6, 2012 Franchise Ordinance has a seven (7) year term from its effective date of September 2, 2012; and WHEREAS, Coble's Sandrock, Inc. ("Coble's") is currently operating a construction and demolition debris landfill within the jurisdiction of Alamance County pursuant to said Ordinance; WHEREAS, Coble's wishes to move forward with the next phase of its construction and demolition debris landfill pursuant to a new Ordinance Granting a Construction and Demolition Debris Landfill Franchise to Coble's Sandrock, Inc., and desires to have the Franchise Ordinance run for a term of seven (7) years concurrent with the permit issued to Coble's by the State of North Carolina; and WHEREAS, the Board of Commissioners desires to grant to Coble's Sandrock, Inc. a franchise with a seven (7) year term for the disposal of construction and demolition debris in Alamance County. NOW, THEREFORE, THE BOARD OF COMMISSIONERS FOR THE COUNTY OF ALAMANCE DOTH ORDAIN: Section 1. Pursuant to the Alamance County Landfill Franchise Ordinance and North Carolina General Statutes §§ 130A-294, 153A-121 and 153A-136, Coble's is hereby granted a franchise to proceed with permitting of the next cells and further expansion of its construction and demolition landfill on Foster Store Road in the County of Alamance, as reflected on Exhibit A, and to operate said landfill in Alamance County. Although the total projected life of the landfill is in excess of 20 years, the active landfill cells will utilize no more than 16 acres of space during the seven (7) year term of this franchise and the average daily volume (based on weekday operation) accepted at the landfill will not exceed 600 tons of construction and demolition debris (excluding recycled material). Section 2. The landfill will continue to be operated as Coble's Sandrock, Inc. Kent and Brenda Coble currently own 100% of the stock in the corporation and will seek approval from the County before the transfer of any ownership interest to anyone other than one of the following immediate family members: Deanna C. Martin, Carey C. Rohrer, and Jennifer C. Gum. Transfer of said stock by any family member to anyone outside the family must be approved by the County. Section 3. Throughout the term of this new franchise and at Coble's election, Coble's will either (1) maintain a. $500,000,00 pollution liability insurance policy, with the County named as an additional insured, or (2) provide $500,000.00 of financial security using a mechanism satisfactory to both the County and Coble's, throughout the life of the landfill. The requirement for financial security will terminate and be returned to Coble's twenty (20) years after the landfill is closed. Section 4. The population to be served by the landfill will consist primarily of commercial contractors who specialize in construction, demolition, and land-clearing activities and haulers who haul materials generated from such activities. Except as set forth below, the area to be served by the landfill will be limited to a service area of twenty-five (25) miles from the landfill. The County recognizes that Coble's currently accepts waste from customers located more than twenty-five (25) miles from the landfill and these existing customers are hereby grandfathered under this franchise. Coble's has provided to the County a list of existing customers and the twenty-five (25) mile service area limitation shall not apply to and Coble's may continue to accept waste from said entities and their divisions, subsidiaries, affiliates, assigns and successors in interest. Coble's also may accept waste from new customers outside the twenty-five (25) mile service area to replace existing customers outside the twenty-five (25) mile service area. Although Coble's may accept waste from outside the twenty-five (25) mile radius as noted above, Coble's agrees to give first priority in terms of space in the landfill to Alamance County generated waste. Section 5. Coble's will construct new landfill cells with a uniform foundation layer free from preferential flow paths. Such a foundation can consist of natural soils or compacted fill located on site. In the event that a soil or rock layer is encountered at the base of the landfill which would serve as a preferential flow path that would alter the ability of the site's groundwater monitoring system to detect contamination in the uppermost significant aquifer, a re-compacted soil layer shall be constructed as follows: The affected area will be over excavated a minimum of two feet and replaced with a two-foot thick re-compacted soil layer. Compaction will be a minimum of 95% compaction and the layer will be constructed in four equal lifts. Section 6. The waste stream that may be accepted by the landfill will be composed of waste or debris resulting from roofing, construction, remodeling, repair, or demolition 2 operations on pavement, buildings, or other structures. There also will be waste accepted from land-clearing activities such as stumps, trees, limbs, brush, and other naturally occurring vegetative matter. Inert debris such as concrete, brick, concrete block, uncontaminated soil, gravel and rock, and wood also will be accepted. Yard waste, including grass, will not be accepted at the landfill. Coble's must monitor the waste offered to the landfill and reject any loads of floor tiles or very old siding and very old roofing shingles that are likely to contain significant levels of asbestos. Other unacceptable wastes include friable asbestos, organic/household wastes, wastes that have been in contact with petroleum, solvents, or chemicals waste containing PCBs, and waste that has been in contact with pesticides or herbicides. Section 7. The application and fee of $100.00 have been received. Section 8. The current stated gate rate for the landfill and the stated gate rate that Coble's anticipates will be in effect on or before September 2, 2019 is $33.50 a ton with a minimum charge of $15 per load. Coble's shall give notice of any proposed stated gate rate change to the County at least sixty (60) days prior to the proposed effective date of the rate change. Section 9. This franchise shall have a term of seven (7) years, running from the effective date set forth in Section 14 below. Section 10. Coble's agrees to operate the landfill in accordance with all applicable laws and regulations and comply in all material respects with any permit issued by the State of North 'Carolina. Section 11. Coble's will instruct all haulers using the landfill to comply with N.C.G.S. § 20.116(g). Section 12. Coble's will comply with the Alamance County Recycling Ordinance and will separate recyclable cardboard from the waste received at the landfill. Section 13. Coble's will pay an annual host fee to the County of One Dollar (S1.00) per ton of waste deposited in the landfill beginning the day the new cell is opened for business. No host fee is required for materials that are recycled and, therefore, not deposited in the landfill. The host fee shall be paid based on the monthly volume of waste deposited in the landfill and shall be paid for each month by the 15th of the following month. The official volume of waste deposited in the landfill shall be based on Coble's annual report filed with the State of North Carolina by August 1 of each year. If the annual report shows a higher volume of waste deposited in the landfill than reflected in earlier payments, then Coble's will pay the host fee for July plus $1.00 per ton for any excess amount reflected in the annual report no later than August 15. if the annual report shows a lesser volume of waste deposited in the landfill than reflected in earlier payments, then Coble's will pay the host fee for July less $1,00 per ton for the lesser amount reflected in the annual report no later than August 15. 3 Section 14. This ordinance requires readings and approval at two regular meetings of the Board of Commissioners of Alamance County, pursuant to and as required by N.C.G.S. § 153A-46, and will become effective on September 2, 2019, This ___ day of ___________, 2019 ______________________________________ Chair ______________________________________ Vice Chair _______________________________________ Commissioner _______________________________________ Commissioner _______________________________________ Commissioner 1st Reading Approved ___________2019. 2nd Reading Approved ____________2019. 4 Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 OPERATIONS PLAN COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01-05 may 2019 Project no. 2191087 III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 1 May 2019 Coble’s Sandrock, North Carolina TABLE OF CONTENTS OPERATION PLAN ........................................................................................................................... 2 1. Waste Acceptance and Disposal ....................................................................................... 2 2. Wastewater Treatment Sludge ........................................................................................... 3 3. Waste Exclusions ................................................................................................................ 3 4. Cover Material Requirements ............................................................................................ 4 5. Spreading and Compacting Requirements ....................................................................... 5 6. Disease Vector Control ....................................................................................................... 5 7. Air Criteria and Fire Control ................................................................................................ 5 8. Access and Safety Requirements ...................................................................................... 6 9. Erosion and Sediment Control ........................................................................................... 6 10. Drainage Control and Water Protection ......................................................................... 6 11. Survey for Compliance .................................................................................................... 7 12. Operating Record and Recordkeeping ........................................................................... 7 APPENDICES APPENDIX A WASTE INSPECTION FORM APPENDIX B EPA HAZARDOUS WASTE INSPECTION GUIDE DRAWINGS DRAWING EP-01 - EXISTING CONDITIONS DRAWING EP-03 – PHASED GRADING DRAWING EP-04 – PHASED GRADING DRAWING EP-05 – PHASED GRADING DRAWING EP-07 – FINAL PHASE 3 E&S PLAN DRAWING EP-08 - PHASE 3A E&S PLAN DRAWING EP-09 - PHASE 3B E&S PLAN III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 2 May 2019 Coble’s Sandrock, North Carolina OPERATIONS PLAN The owner or operator of a C&DLF unit must prepare an operation plan for each phase of landfill development. Each phase of operation must be defined by an area, which contains approximately five years of disposal capacity. The Plan drawings must be consistent with the engineering plan and prepared in a format useable for the landfill operator. No changes to the Engineering Plan are proposed for this five-year permit renewal and Life of Site application. This Plan is compiled to address the rule .0542 for a C&D landfill operation. 1. Waste Acceptance and Disposal Only construction/demolition and land clearing/inert debris is proposed for disposal at the landfill in their respective permitted areas. Construction and demolition debris is defined in NC General Statutes as waste or debris resulting solely from construction, remodeling, repair, or the demolition of pavement, buildings, or other structures. Land clearing and inert debris includes waste such as stumps, trees, limbs, leaves, brush, grass, brick, block and untreated wood. The landfill owner or operator will notify the Division of Waste Management (Division) within 24 hours of attempted disposal of any waste the C&DLF is not permitted to receive, including waste from outside the area the landfill is permitted to serve. Non-disposable treatment/process waste such as recyclable material will be segregated from the waste stream and temporarily stored in containers or stockpiles prior to being removed from the site. Recyclable material may include wood, yard waste, metals, mobile home destruction materials, concrete, cardboard, post-consumer asphalt shingles, and other materials identified as appropriate for recycling. Land clearing debris and clean wood is stockpiled and ground to mulch periodically. Engineered wood is separated from clean wood and ground periodically and sold for boiler fuel. The wood grinding and stockpiling is currently conducted within the Phase 4 landfill footprint. Coble’s Sandrock destructs mobile trailer homes at the working face of the C&D landfill. Identified C&D waste material removed from the destruction process is placed into the landfill. The mobile home destruction and the recyclable materials storage area is at the working face of the landfill. Scrap material is removed from the site frequently and taken to D.H. Griffin Wrecking Co. Inc. In the process of destruction of the mobile homes, the facility operator will adhere to Section 6 in the County Franchise Agreement regarding asbestos and the Solid Waste Section guidance document. The landfill receives broken concrete, block and brick from demolition projects. The material is stockpiled on site and crushed to ruble. A vendor provides the crushing operation once or twice a year and the rubble is sold for aggregate. The concrete stockpiling and crushing is conducted within the Phase 4 landfill footprint. III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 3 May 2019 Coble’s Sandrock, North Carolina Cardboard is stored in a 40-yard container that is removed from the site by Federal Paper Board when full. Various plastics are received with the waste, but due to the variety of the material and limited quantity the plastics are placed in the working face for landfilling. The facility is permitted for recycling post-consumer asphalt shingles, and the shingles are periodically picked up by S.T. Wooten Corporation. The asphalt shingles stockpiling is within the Phase 4 landfill footprint. The facility engages temporary disaster debris staging and the old LCID landfill mining and screens wood from soil. The wood is mixed with the clean land clearing debris, and the material is ground and included in the mulch. The mulch is sold to general public. The recyclable and recoverable materials will be segregated from the waste stream and temporarily stored in containers or stockpiles. The facility maintains variety of heavy equipment for landfill operations and management of the recyclable/recoverable materials. The segregation and handling of the recyclable/recoverable materials is mostly managed by front end and track loaders. Appendix A includes a Waste Inspection Form and Appendix B EPA Hazardous Waste Inspection Guidance. 2. Wastewater Treatment Sludge Wastewater treatment sludge will not be accepted for disposal. Wastewater treatment sludge may be accepted, with the approval of the Division, for utilization as a soil conditioner and incorporated into or applied onto the vegetative growth layer. The wastewater treatment sludge will neither be applied at greater than agronomic rates nor to a depth greater than six inches. 3. Waste Exclusions The following wastes will not be disposed of in the landfill: (1) Containers such as tubes, drums, barrels, tanks, cans, and bottles unless they are empty and perforated to ensure that no liquid, hazardous or municipal solid waste is contained therein, (2) Garbage as defined in G.S. 130A-290(a)(7), (3) Hazardous waste as defined in G.S. 130A-290(a)(8), to also include hazardous waste from conditionally exempt small quantity generators, (4) Industrial solid waste unless a demonstration has been made and approved by the Division that the landfill meets the requirements of Rule .0503(2)(d)(ii)(A), (5) Liquid wastes, (6) Medical waste as defined in G.S. 130A-290(a)(18), (7) Municipal solid waste as defined in G.S. 130A-290(a)(18a), III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 4 May 2019 Coble’s Sandrock, North Carolina (8) Polychlorinated biphenyls (PCB) wastes as defined in 40 CFR 761, (9) Radioactive waste as defined in G.S. 104E-5(14), (10) Septage as defined in G.S. 130A-290(a)(32), (11) Sludge as defined in G.S. 130A-290(a)(34), (12) Special wastes as defined in G.S. 130A-290(a)(40), (13) White goods as defined in G.S. 130A-290(a)(44), and (14) Yard trash as defined in G.S. 130A-290(a)(45), (15) The following wastes cannot be received if separate from C&DLF waste: lamps or bulbs including, but not limited to halogen, incandescent, neon or fluorescent; lighting ballast or fixtures. Thermostats and light switches; batteries including, but not limited to those from exit and emergency lights and smoke detectors. Lead pipes, lead roof flashing, transformers, capacitors, and copper chrome arsenate (CCA), and creosote treated woods. (16) (16) Waste accepted for disposal in a C&DLF unit must be readily identifiable as C&D waste and must not have been shredded, pulverized, or processed to such an extent that the composition of the original waste cannot be readily ascertained except as specified in Subparagraph (17) of this Paragraph. (17) C&D waste that has been shredded, pulverized or otherwise processed may be accepted for disposal from a facility that has received a permit from an authorized regulatory authority, which specifies such activities are inspected by the authority, and whose primary purpose is recycling and reuse of the C&D material. A waste screening plan and waste acceptance plan must be available to the Division upon request. (18) The owner or operator will not knowingly dispose any type or form of C&D waste that is generated within the boundaries of a unit of local government that by ordinance: (A) Prohibits generators or collectors of C&D waste from disposing that type or form of C&D waste. (B) Requires generators or collectors of C&D waste to recycle that type or form of C&D waste. (19) Friable asbestos 4. Cover Material Requirements Waste must be covered with six inches of earthen material when the waste disposal area exceeds one-half acre and at least once weekly. Cover must be placed at more frequent intervals if necessary to control disease vectors, fires, odors, blowing litter, and scavenging. A notation of the date and time of the cover placement must be recorded in the operating record. Areas that will not have additional waste placed on them for three months or longer, but where final termination of disposal operations has not occurred, must be covered and stabilized with vegetative ground cover or other stabilizing material. III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 5 May 2019 Coble’s Sandrock, North Carolina Mulch generated from excavated LCID material may be used as a soil amendment for cover soil. 5. Spreading and Compacting Requirements The open waste disposal area must be kept as small as is feasible. Compact waste as densely as practical into cells. Windblown litter is not anticipated to be a significant problem at the C&D landfill due to the heavy, bulky nature of this waste type. Prompt compaction of the waste at the working face must be conducted to minimize litter. Use wind fence as necessary to minimize windblown trash. 6. Disease Vector Control Prevent and control on-site populations of disease vectors using techniques appropriate for the protection of human health and the environment. 7. Air Criteria and Fire Control The landfill must not violate any applicable requirements developed under a State Implementation Plan (SIP) approved or promulgated by the U.S. EPA Administrator pursuant to Section 110 of the Clean Air Act, as amended. No open burning of solid waste, except for the approved burning of land clearing debris generated on-site or debris from emergency clean-up operations. Prior to any planned burning, submit a request to the Division for review. A notation of the date of approval and the name of the Division personnel who approved the burning must be included in the operating record. The facility must implement a fire prevention plan that includes maintaining a minimum of 25 feet wide fire isle between each stockpile of flammable or combustible recyclable/recovered material. Maintain reasonable isle width between each stockpile at all times for accessing heavy equipment for material handling, transportation and management. If a fire occurs at the waste disposal area, remove or segregate other waste in the disposal area if possible. Following the segregation, reevaluate the situation to determine should emergency personnel be notified. If necessary, call the Snow Camp and/or E.M. Holt Volunteer Fire Departments to render assistance and provide support in fighting any fires that occur at this site. Fire extinguishers must be carried on each piece of landfill equipment on site, and used for small, localized fires. Equipment operators must be trained in the use of these extinguishers. Maintain a stockpile of soil near the working face to be used for extinguishing surface fires that are too large to control with the fire extinguishers on the landfill equipment. Water in sedimentation ponds and nearby creeks is available for firefighting to extinguish larger fires. III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 6 May 2019 Coble’s Sandrock, North Carolina Fires and explosions that occur at the landfill must be verbally reported to the Division within 24 hours and written notification submitted within 15 days. Written notification must include the suspected cause of fire or explosion, the response taken to manage the incident, and the action(s) to be taken to prevent the future occurrence of fire or explosion. Wind-blown litter and odor control measures are typically not problematic at C&D landfills. Maintain small working phase, place the waste and compact it in timely manner to prevent wind gusts to blow the lighter material. Fugitive odors are best managed by covering the waste immediately with other waste or with daily cover material. 8. Access and Safety Requirements Access to the facility is controlled through a single access road. A metal gate prevents access after operating hours. Traffic moves from the entrance gate to the landfill along gravel haul road that extends approximately a quarter-mile from the facility entrance. The entrance is planned to remain at its present location. The haul roads may be rerouted as needed to access the proposed C&D expansion area. In accordance with G.S. 130A-309.25, an individual trained in landfill operations must be on duty at the site while the facility is open for public use and at all times during active waste management operations to ensure compliance with operational requirements. The access road to the site and roads to monitoring locations are of all-weather construction and maintained in good condition. Water access roads periodically, as needed, to minimize dust. A sign providing information on disposal procedures, the hours during which the site is open for public, the permit number and other pertinent information specified in the permit conditions is posted at the site entrance. Liquids, hazardous and municipal solid waste are listed on a sign as excluded wastes. Provide signs or markers as necessary to promote an orderly traffic pattern to and from the disposal area and to maintain efficient operating conditions. No removal of solid waste from the landfill is allowed unless indicated in the operations plan as a recycling procedure. General public is not allowed to remove material from the working face. 9. Erosion and Sediment Control Sediment control measures must be followed to prevent sediment from leaving the facility, and to prevent on-site erosion of the landfill. Vegetative cover must be established on all competed areas of the landfill. 10. Drainage Control and Water Protection Divert surface water from the operational area and prevent impounding over or in waste. Do not dispose of waste in water. The landfill must not cause a discharge of pollutants into waters of the United States, including wetlands, that violates any requirements of the Clean Water Act, including the National Pollutant Discharge Elimination System (NPDES) requirements, pursuant to Section 402. The landfill must not cause the discharge of a III - Operations Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS 7 May 2019 Coble’s Sandrock, North Carolina nonpoint source of pollution to waters of the United States, including wetlands, that violates any requirement of an area-wide or State-wide water quality management plan that has been approved under Section 208 or 319 of the Clean Water Act, as amended. 11. Survey for Compliance Within 60 days of the permittee's receipt of the Division's written request, the permittee must conduct a survey of active or closed portions of unit(s) at the facility in order to determine whether operations are being conducted in accordance with the approved design and operational plans. The permittee must report the results of such survey, including a map produced by the survey, to the Division within 90 days of receipt of the Division's request. The survey must be performed by a registered land surveyor authorized under North Carolina law to conduct such activities. 12. Operating Record and Recordkeeping The owner and operator must record and retain at the facility, or in an alternative location near the facility, the following information: (A) records of random waste inspections, monitoring results, certifications of training, and training procedures required by Rule .0544 of this Section; (B) amounts by weight of solid waste received at the facility to include, consistent with G.S. 130A-309.09D, county of generation; (C) any demonstration, certification, finding, monitoring, testing, or analytical data required by Rules .0544 through .0545 of this Section; (D) any closure or post-closure monitoring, testing, or analytical data as required by Rule .0543 of this Section; (E) any cost estimates and financial assurance documentation required by Rule .0546 of this Section; (F) notation of date and time of placement of cover material; and (G) all audit records, compliance records and inspection reports. All information contained in the operating record must be furnished to the Division according to the permit or upon request, or be made available for inspection by the Division. The operating record must also include: (A) A copy of the approved operation plan required by this Rule and the engineering plan required by Rule .0539 of this Section; (B) A copy of the current Permit to Construct and Permit to Operate; and (C) The Water Quality and Landfill Gas Monitoring Plans, in accordance with Rule .0544 of this Section. APPENDICES Attach related correspondence to this form File completed form in Operating Record COBLE’S C&D LANDFILL WASTE INSPECTION FORM FORM A DATE: TIME WEIGHED IN. TRUCK OWNER: DRIVER NAME: TRUCK TYPE: VEHICLE ID/TAG: WEIGHT: TARE: WASTE SOURCE: Reason Load Inspected: Random Inspection ______ Staff Initials _____ Detained at Scales ______ Staff Initials _____ Detained by Operating Staff ______ Staff Initials _____ Inspection Location: ____________________________________________________________ Description of Load: ____________________________________________________________ Waste: Accepted [ ] Rejected [ ] Held [ ] Notified: Supervisor [ ] County EMS [ ] Generator [ ] Hauler [ ] NCDENR [ ] Federal [ ] Loader Operator: ____________________________________________________________ Personnel Conducting the Inspection: __________________________________________ Load Accepted (signature) _____________________ Date ___________ Load Not Accepted (signature) _____________________ Date ___________ REASON LOAD NOT ACCEPTED (Complete the following section if load not accepted)_ Description of Suspicious Contents: Color ________________ Texture ________________ Smell __________________ Drums Present __________ Haz. Waste Markings _____________________________ Estimated CY present in load: _________ Estimated tons present in load:________ Emergency Management Contacted? ______________ ___________________ Hazardous Materials Present: ____________________________________________________ ______________________________________________________________________________ Hauler notified (if waste not accepted) Phone: ____________ Time Contacted: _________ Other Observations: ____________________________________________________________ ______________________________________________________________________________ Final Disposition Signature: _________________________ Date: _________ Time: _______ Waste Screening Inspector or Landfill Manager ADDITIONAL COMMENTS: on the back EPA Landfill Criteria Technical Manual, Subpart C, November 1993 DRAWINGS Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 CONSTRUCTION QUALITY ASSURANCE PLAN COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01-05 may 2019 Project no. 2191087 IV - Construction Quality Assurance Plan i LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina TABLE OF CONTENTS 1.0 INTRODUCTION ................................................................................................................................................. 1 1.1 PURPOSE ....................................................................................................................................................... 1 1.2 DEFINITIONS.................................................................................................................................................. 1 1.2.1 Quality Control ....................................................................................................................................... 1 1.2.2 Quality Assurance ................................................................................................................................. 2 1.3 PARTIES ......................................................................................................................................................... 2 1.3.1 OWNER .................................................................................................................................................. 2 1.3.2 ENGINEER ............................................................................................................................................. 2 1.3.3 CQA Consultant ..................................................................................................................................... 3 1.3.4 Soils CQA Laboratory ............................................................................................................................ 3 1.3.5 CONTRACTOR ........................................................................................................................................ 3 1.3.6 Surveyor ................................................................................................................................................. 3 1.4 COMMUNICATIONS AND MEETINGS ............................................................................................................. 4 2.0 EARTH MATERIALS ........................................................................................................................................... 4 2.1 INTRODUCTION ............................................................................................................................................. 4 2.2 SCOPE ............................................................................................................................................................ 4 2.2.1 General .................................................................................................................................................. 4 2.3 EARTH MATERIALS CQA TESTING ................................................................................................................. 5 2.3.1 General .................................................................................................................................................. 5 2.3.2 Construction Quality Evaluation Testing .............................................................................................. 5 2.3.3 Test Pad ................................................................................................................................................. 6 2.4 DOCUMENTATION/CERTIFICATION .............................................................................................................. 6 2.4.1 General .................................................................................................................................................. 6 2.4.2 Construction Monitoring ....................................................................................................................... 7 2.4.3 Certification ........................................................................................................................................... 7 TABLES Table 1 - Soil Testing Methods and Frequencies IV - Construction Quality Assurance Plan 1 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 1.0 INTRODUCTION 1.1 PURPOSE This plan addresses the construction quality assurance (CQA) procedures and requirements to be employed during construction of the project. The plan is intended to supplement, but not supersede, the Contract Drawings and Specifications; where a conflict arises, the Contract Documents or approved Contract Drawings and Specifications shall govern. All parties involved in the project should obtain a copy of this plan from the OWNER or ENGINEER. They should also obtain copies of any supplemental CQA documents prepared specifically for the project. The overall goals of the CQA program are to ensure that proper construction techniques and procedures are employed, and to verify that the materials used meet the approved Contract Specifications. Additionally, the program shall identify and define problems that may occur during construction, allowing corrective activities to be implemented in a timely manner. At the completion of the work, the program requires the certifying CQA Consultant(s) to prepare certification reports indicating that the facility has been constructed in accordance with the approved design standards and Contract Specifications. 1.2 DEFINITIONS The following definitions are applicable to this plan: 1.2.1 Quality Control Definition (ASTM D3740): - a planned system of activities, or the use of such a system, whose purpose is to provide a level of quality that meets the needs of users. The objective of quality control is to provide quality that is safe, adequate, dependable, and economical. The overall system involves integrating the quality factors of several related steps including: the proper specification of what is wanted, production to meet the full intent of the specification, inspection to determine whether the resulting material, product, service, etc… is in accordance with the Specifications, and review of usage to determine necessary revisions of Specifications. In practice, Quality Control refers to those procedures, criteria, and tests employed and paid for by the CONTRACTOR(s) to confirm that the work satisfies the CONTRACTOR’s standards, and is in compliance with the Contract Drawings and Specifications. This plan does not address Quality Control procedures, criteria, and/or tests employed by the CONTRACTOR. IV - Construction Quality Assurance Plan 2 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 1.2.2 Quality Assurance Definition (ASTM D3740): - a planned system of activities whose purpose is to provide assurance that the overall quality control program is in fact being effectively implemented. The system involves a continuing evaluation of the adequacy and effectiveness of the overall quality control program with the ability to have corrective measures initiated where necessary. For a specific material, product, service, etc…, this involves verifications, audits, and the evaluation of the quality factors that affect the specification, production, inspection, and use of the product, service, system, or environment. In practice, Quality Assurance refers to those procedures, criteria, and tests required and paid for by the OWNER to confirm that the work performed by the CONTRACTOR(s) is in compliance with the approved Contract Drawings and Specifications and any additional requirements of this plan. 1.2.3 Layer A layer is defined as a compacted stratum composed of several lifts constructed without joints. 1.2.4 Lift A lift is defined as a segment of a layer composed of the maximum thickness of soil permitted to be placed / compacted at one time. 1.3 PARTIES 1.3.1 OWNER The OWNER is the owner of the solid waste permit, and bears the ultimate responsibility for the facility; the OWNER may or may not also be the Operator of the facility. The OWNER shall contract and manage the CONTRACTOR(s), and the CQA consultant(s) and laboratories. For this project, the Coble’s Sandrock, Inc. is the OWNER. 1.3.2 ENGINEER The ENGINEER is the official representative of the OWNER, and is responsible for the preparation of the Contract Drawings, Technical Specifications, and CQA Plan. The IV - Construction Quality Assurance Plan 3 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina ENGINEER is also responsible for the interpretation of those documents and for the resolution of technical matters that may arise during construction. For this project, the ENGINEER is Labella Associates, PC. 1.3.3 CQA Consultant The CQA Consultant is independent from the CONTRACTOR(s), Manufacturer, and Installer, that is responsible for observing, testing, and documenting activities related to the Quality Assurance of the earthwork at the site. The CQA Consultant corresponds with the ENGINEER throughout the project and shall report deviations from the Work and items of non-compliance. The CQA Consultant is also responsible for issuing a certification report, sealed by a registered Professional Engineer, licensed in the State in which the project work is conducted. 1.3.4 Soils CQA Laboratory The Soils CQA Laboratory is independent from the CONTRACTOR(s), and Supplier, responsible for performing the required laboratory testing of the project earthwork components. 1.3.5 CONTRACTOR The CONTRACTOR has the primary responsibility for ensuring that the work is performed in accordance with the Contract Drawings and Specifications developed by the ENGINEER and approved by the permitting agency. Other responsibilities include the performance of all construction activities at the site including site facilities, administration, material purchasing, procurement, supervision, Construction Quality Control, installation, and subcontracting. The CONTRACTOR is responsible for the protection of completed work until it is accepted by the OWNER. The CONTRACTOR is also responsible for informing the OWNER and CQA Consultants of the scheduling and occurrence of all construction activities. 1.3.6 Surveyor The Surveyor is responsible for establishing and maintaining lines and grades and temporary benchmarks throughout all relevant areas of the construction site. The Surveyor shall issue a complete set of Record Drawings certified by a Professional Land Surveyor, licensed in the State in which the project work is conducted. IV - Construction Quality Assurance Plan 4 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 1.4 COMMUNICATIONS AND MEETINGS Frequent and open communications are a necessary and essential component of this plan in order to achieve a high degree of coordination, cooperation, and quality in the finished product, and to minimize or avoid delays. It is one goal of this plan to resolve problems at the lowest possible level of authority while maintaining thorough documentation, informing all responsible parties, and obtaining approvals as necessary or appropriate. The documentation requirements of CQA activities are addressed in various sections of this plan. A series of meetings shall be held before, during, and after construction to facilitate planning, progress reports and problem resolution. Minutes are to be kept of all meetings as directed by the ENGINEER. The meetings shall be as follows unless otherwise directed by the OWNER: • Preconstruction Meeting to be held as directed by the ENGINEER and to be attended by the OWNER or Owner’s Representative, CQA Consultant, CONTRACTOR, significant subcontractors and suppliers as designated by the ENGINEER. • Progress Meetings to be held as directed by the ENGINEER and to be attended by the OWNER or Owner’s Representative, CQA Consultant, CONTRACTOR, and representatives of parties actively involved in the construction as designated by the ENGINEER. • Post-Construction Resolution Meeting to be attended by the OWNER or Owner’s Representative, CQA Consultant, CONTRACTOR, significant subcontractors and suppliers as directed by the ENGINEER. 2.0 EARTH MATERIALS 2.1 INTRODUCTION This section of the plan describes Construction Quality Assurance (CQA) procedures for the installation of the earth material components of the project. 2.2 SCOPE 2.2.1 General The work addressed under this section shall facilitate proper construction of all earth material components of the project. All work shall be constructed to the lines, grades, and dimensions indicated on the approved Contract Drawings, in accordance with the Contract Specifications, or as required by the OWNER or OWNER’s Representative. IV - Construction Quality Assurance Plan 5 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 2.3 EARTH MATERIALS CQA TESTING 2.3.1 General Assurance that construction of the earth material components of the project has been performed in accordance with the approved Contract Drawings and Specifications shall be accomplished by use of CQA testing and visual observations. CQA testing shall consist of the following: • Construction Quality Evaluation; and • Special Testing. 2.3.2 Construction Quality Evaluation Testing Construction quality evaluation shall be performed on all components of earthwork construction at the frequencies shown in Table 1. Criteria to be used for determination of acceptability of the work shall be as identified in the Contract Specifications and as detailed in this plan. Construction evaluation testing shall consist of visual observations of the work, in-place density/moisture content verification, investigations into the adequacy of layer bonding and clod destruction, elevation and thickness monitoring, and special testing. Evaluation of the construction work shall include the following: • Observations and documentation of the water content, clod size and other physical properties of the soil during processing, placement and compaction; • Observation and documentation of each compacted lift’s ability to accept and bond to subsequent lifts; • Observation and documentation of the thickness of compacted and loosely placed lifts; • Observation and documentation of the performance of the compaction and heavy hauling equipment on the construction surface (sheepsfoot penetration, pumping, cracking, etc…); and • Observation and documentation of the effectiveness of the procedures used to prevent desiccation and/or freezing of completed lifts and layers. The in-place density test methods shall cause minimal delay to the placement of subsequent lifts; therefore, the nuclear method is preferred unless construction sequencing is such that fill placement is not interrupted by drive cylinder testing. An acceptable test for soils used in structural or “controlled fill” applications (i.e. IV - Construction Quality Assurance Plan 6 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina embankments, berms, backfill, soil liner, subgrade, etc.) shall be defined as one, which meets or exceeds the specified minimum density within the specified moisture range. If there is any question as to the classification of the tested soil, and hence the appropriateness of a given moisture-density plot, a “one-point” Standard Proctor compaction test shall be performed for comparison with the available plots. The optimum moisture content and maximum dry density extrapolated from the one-point test result must fall on or near the plotted line of optimums for the classification of a soil to be confirmed. For controlled fill, the reference maximum dry density can be adjusted to accommodate the one-point data. Questions concerning the accuracy of any single test shall be addressed by retesting in that or another representative location. Periodic drive cylinder testing shall be performed to verify the adequacy of the nuclear gauge testing at the frequencies designated in Table 1. If a conflict exists between the drive cylinder testing and the corresponding nuclear density test results, then the drive cylinder results shall control. It is important to bond lifts together to the greatest extent possible. Bonding of lifts is enhanced by: • Ensuring that the surface of the previously compacted lift (or subgrade) is rough before placing the new lift of soil; • Adding moisture to the previously compacted lift (or subgrade); and • Using a fully penetrating footed roller. Evaluation of lift bonding in soil liner and similar applications shall be done by using test pits or auger holes to visually observe the lift interfaces. Alternatively, Shelby tubes pushed through the lift interfaces can be visually inspected for proper lift bonding. 2.3.3 Test Pad A test pad shall be constructed as outlined in the project specifications to develop and demonstrate construction methods that shall be used to produce a compacted soil cap satisfying the requirements of the specifications. 2.4 DOCUMENTATION/CERTIFICATION 2.4.1 General The CQA Consultant shall document the activities associated with the construction of the earth material components of the project. Such documentation shall include, as a IV - Construction Quality Assurance Plan 7 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina minimum, daily reports of construction activities and a summary technical report on the construction project. Documentation and reporting shall meet all requirements of the Contract Specifications and this CQA Plan. 2.4.2 Construction Monitoring Construction of earth material components of the project shall be monitored and documented by a CQA Consultant. Soils laboratory testing shall be performed and documented by an independent testing laboratory working under the direction of the CQA Consultant. Written daily documents shall include a record of observations, test data sheets, identification of problems encountered during construction, corrective measures taken, weather conditions, and personnel and equipment on site. 2.4.3 Certification The CQA Consultant(s) shall prepare a certification report addressing each major item identified above for each phase of construction under their areas of responsibility. Certification reports required by regulatory agencies shall also be prepared and submitted as required. Certification shall include assessments of compliance with the Contract Drawings and Specifications and the results of the physical sampling and testing. At a minimum, the certification report shall include: • Copies of all CQA field reports and results of all field testing including drawings depicting the locations of construction testing when appropriate; • Results of all laboratory testing; • Photographs representative of major construction activity; and • Certification statement assessing compliance with the Contract Drawings and Specifications, sealed by a professional engineer, licensed in the State in which the project work is conducted. IV - Construction Quality Assurance Plan 8 LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina TABLE 1 - SOIL TESTING METHODS AND FREQUENCIES Test Method Fill Test Pad Soil Liner/Cap Pre- Construction Construction Pre- Construction Construction Construction Particle Size Analysis of Soils ASTM D422 One/Material One/Material(1) One/Material NA NA Unified Soil Classification System ASTM D2487 One/Material One/Material(1) One/Material NA NA Moisture Content of Soil Lab Method ASTM D2216 One/Material One/Material(1) One/Material NA NA Atterberg Limits ASTM D4318 One/Material One/Material(1) One/Material NA NA Specific Gravity ASTM D854 One/Material One/Material(1) One/Material NA NA Standard Proctor ASTM D698 One/Material One/Material(1) One/Material NA NA In-place Density by Sand Cone ASTM D1556 or Drive Cylinder ASTM D2937 NA 1/Acre NA 1/Lift 1/Lift/Acre In-place Density and Water Content by Nuclear Method ASTM D6398 NA 5/Acre NA 5/Lift 5/Lift/Acre Soil Moisture By Direct Heating ASTM D4959 NA 1/Acre NA 1/Lift 1/Lift/Acre Undisturbed Hydraulic Conductivity ASTM D5084 NA NA NA 1/Lift 1/Lift/Acre Laboratory Compacted Hydraulic Conductivity ASTM D5084 NA NA One/Material NA One/Material NA – Not Applicable (1) required only if material changes END OF CONSTRUCTION QUALITY ASSURANCE PLAN Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 CLOSURE & POST-CLOSURE CARE PLAN COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01-05 may 2019 Project no. 2191087 V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 1 May 2019 Coble’s Sandrock, North Carolina Contents CLOSURE & POST-CLOSURE CARE PLAN...................................................................................... 2 CLOSURE ........................................................................................................................................ 2 1. Description of Cap System: ................................................................................................ 2 2. Closure Area ........................................................................................................................ 2 3. Waste Inventory .................................................................................................................. 3 4. Schedule .............................................................................................................................. 3 5. Cost Estimate for Closure ................................................................................................... 4 6. Closure Certification ........................................................................................................... 4 7. Deed Recordation ............................................................................................................... 4 POST CLOSURE ........................................................................................................................... 5 1. Contact................................................................................................................................. 5 2. Security ................................................................................................................................ 5 3. Post-Closure Maintenance ................................................................................................. 5 4. Inspection Plan .................................................................................................................... 6 5. Post-Closure Land Use ........................................................................................................ 6 APPENDICES APPENDIX A GROUNDWATER MONITORING WELL MAINTENANCE RECORD APPENDIX B POST-CLOSURE INSPECTION RECORD APPENDIX C METHANE MONITORNG TEST RECORD V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 2 May 2019 Coble’s Sandrock, North Carolina CLOSURE & POST-CLOSURE CARE PLAN CLOSURE 1. Description of Cap System: The cap system to be used is designed to minimize infiltration and erosion. The cap system will consist of: • A low-permeability infiltration layer of at least 18 inches with a permeability not greater than 1.0 x 10-5 cm/sec; • An erosion layer that contains a minimum of 18 inches of earthen material that is capable of sustaining native plant growth. Construction of the cap system will conform to the plans prepared in accordance with Rule .0540 of this Section and the following requirements: (A) post-settlement surface slopes will be a minimum of five percent and a maximum of 33 percent; and (B) a gas venting or collection system will be installed below the low- permeability barrier to minimize pressures exerted on the barrier. The construction of the closure cap will be in accordance with the Volume 2 Application for Permit to Construct Phase 3 and the specifications provided in Appendix IV. The Application to Construct Phase 3 was approved by the SWS on 2/19/2009. Procedures for Cap Installation The construction of the cap will be in accordance with the specifications provided in Appendix IV. 2. Closure Area Phase 3A and east slopes of Phase 1 and 2A/B are active for landfill operations. Portions of 3A have been closed, but not been reported to the SWS and thus their status is considered not closed. Actual landfill closure applies only to the Phases 1 and 2A/B piggyback and 3A areas. Phase 3B is under construction permitted for 5.8 acres and after issue of permit to operate (PTO) its area will be added to the total of closure requirement. C&D LF Closure area summary Phase Permitted Closed Open 1 6.5 4.2 2.3 2A 0.9 0.9 0 2B 4.6 3.9 0.7 3A 6.3 0 6.3 1-3A 18.3 9 9.3 V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 3 May 2019 Coble’s Sandrock, North Carolina 3. Waste Inventory As of August 2018 annual facility reporting, the cumulative tonnage received and landfilled since the beginning of operations in 1999 was 690,250 tons. At an average density of 1050 pounds/cubic yard, this equates to approximately 1,075,951 cubic yards of consumed airspace. 4. Schedule As of this permit renewal, using the historical average, the remaining capacity calculates one year of life in the permitted Phases 1-3A. For Phase 3B, the projected operating life is approximately in 7 years as noted in the Facility Plan. Thus, closure of the Phases 3A and 3B is not anticipated until 2026, assuming waste disposal in Phase 3 A & B continues at the current historic rate of annual tonnage. Prior to beginning final closure, Coble’s Sandrock must notify the Division that a Notice of Intent to close the facility has been placed in the operating record. Phases 4 through 8 approved for future development require submittals of PTC/PTO applications. The permitted capacity for waste and daily cover of Phases 1-8 is 6,935,903 cy. As of August 2018 the estimated consumed air space is 1,075,951 cy. The remaining balance leaves 5,859,952 cy for waste and daily cover. Closure activities are proposed to begin within 30 days of final receipt of waste. Construction of the closure cap is to be completed within 180 days following the initiation of closure activities. The total length of the proposed closure period is 210 days following the final receipt of waste. Proposed Closure Milestones and Schedule Milestone Proposed Schedule from the Date of Final Receipt of Waste Testing of borrow sources Within 6 months prior to closure Grading of intermediate cover Within 30 to 60 days Placement of soil cap 30 to 150 days Final inspection of cap by P.E. 150 to 180 days Construction of stormwater controls 90 to 180 days Seeding and mulching 150 to 180 days Preparation of survey plat 180 to 210 days Submittal of closure certification 180 to 210 days V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 4 May 2019 Coble’s Sandrock, North Carolina 5. Cost Estimate for Closure Closure Cost Estimate for 9.3 Acres COMPONENT ACRES CY UNITS UNIT COST ($) TOTAL ($) Mobilization 1 $5,000 $5,000 18" Clay (10E-5 cm/sec) 9.3 22,506 CY $3.50 $78,771 18" Field & Lab testing 9.3 TM $2,277 $21,176 18" Vegetative Soil 9.3 22,506 CY $3.50 $78,771 Seeding/Revegetation 9.3 AC $1,500 $13,950 Survey 9.3 1 $1,500 $13,950 Subtotal: $211,618 Engineering/CQA (~5%) 1 $10,581 Contingency (~5%) 1 $10,581 TOTAL $232,780 6. Closure Certification A professional engineer, registered in the State of North Carolina, will verify that the closure has been completed in accordance with the Closure Plan. The contents of the signed Certification Report will be as described below. Certification Reports: The CQA report will contain the results of all the construction quality assurance and construction quality control testing including documentation of any failed test results, descriptions of procedures used to correct the improperly installed material, and results of all retesting performed. The CQA report will contain as-built drawings noting any deviation from the approved engineering plans and will also contain a comprehensive narrative including, but not limited to, daily reports from the project engineer, a series of color photographs of major project features, and documentation of proceedings of all progress and troubleshooting meetings. The CQA report will be submitted after completion of construction of the cap system in accordance with the requirements of Rule .0543. The CQA report must bear the seal of the project engineer and a certification that construction was completed in accordance with the CQA Plan and acceptable engineering practices. 7. Deed Recordation Following closure, the owner or operator will record a notation on the deed to the landfill facility property at the local county Register of Deeds office, or some other instrument that is normally examined during title search, and notify the Division that the notation has been recorded and a copy has been placed in the operating record. The notation on the deed shall in perpetuity notify any potential purchaser of the property that the land has been used as a C&D landfill unit or facility and its use is restricted under the closure plan approved by the Division. V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 5 May 2019 Coble’s Sandrock, North Carolina POST CLOSURE Post-closure activities must be conducted at the landfill for a period of 30 years following closure of the landfill. However, the length of the period can be increased or decreased in accordance with Division directives. 1. Contact Coble’s Sandrock, Inc. will handle questions and/or problems, which might occur during the post-closure care period. CONTACT PERSON: Mr. Kent Coble OWNER: Mr. Kent Coble ADDRESS: 5833 Foster Store Road Liberty, North Carolina 27298 PHONE NUMBER: (336) 565-4750 FAX: (336) 565-4752 2. Security Control access to the site by the use of barriers and gates at roadway entrances. Maintain these control devices throughout the post-closure care period, and inspected as part of the monthly inspection program. Mark all barriers and gates clearly with signs stating the name and nature of the facility and the person to contact in case of emergency or breach of security. 3. Post-Closure Maintenance Post-closure maintenance and monitoring will be conducted at the landfill for a period of 30 years after final closure. The Division may decrease the length of the post-closure period if the owner or operator demonstrates that the reduced period is sufficient to protect human health and the environment, and the Division approves this demonstration. The period might be increased by the Division if the Division determines that the lengthened period is necessary to protect human health and the environment. Monitoring will include semi-annual sampling of groundwater and surface water, quarterly gas monitoring, and quarterly inspection of the final cover and monitoring and control systems. Maintenance needs identified through the monitoring program must be initiated no later than 60 days after the discovery, and within 24 hours if a danger or eminent threat to human health or the environment is indicated. Minor cap maintenance may be deferred until there is a sufficient amount of work to justify the mobilization of equipment and personnel. V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 6 May 2019 Coble’s Sandrock, North Carolina Add soil to the cap as necessary to correct the effects of settlement and subsidence of the landfill and to prevent run-on and run-off from eroding the final cap. Protect and maintain stormwater control devices, surveyed benchmarks, groundwater monitoring wells, surface water monitoring/sampling gauges and LFG wells. Mow vegetation twice per year. Cost for routine maintenance assumes 1/10 of the cap area will require reseeding and fertilizing each year. Maintain and repair security fencing, gates, and access roads as necessary. 4. Inspection Plan Routine inspections will be conducted throughout the post-closure care period. These inspections will be carried out quarterly unless problems are detected that indicate that more frequent visits are warranted. Potential impacts to the public and environment will be considered in determining the inspection frequency. Items to be included in the monthly inspection will be as follows: • Access and security control, • Stormwater management, • Erosion and sediment control, • Gas management, • Groundwater and landfill gas monitoring systems, and • Vector control. The quarterly inspections will be carried out by someone properly trained and knowledgeable about landfills, such as the landfill owner, operator or engineering consultant. The results of the inspections will be documented in Post Closure Inspection Form. If inspections indicate that repairs are necessary, repairs will be initiated as soon as practicable. In addition to the routine quarterly inspections, special inspections will be performed and documented after events which may likely cause damage to the integrity of the landfill cover, such as heavy rainfall events. Inspection may also be necessary following written or verbal complaints, vandalism or fires. Following special inspections, any necessary repairs will be initiated as soon as practicable. Maintain records of all inspections in the operating record. 5. Post-Closure Land Use The primary land use for the site after closure of the landfill will be open dormant green space. V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 7 May 2019 Coble’s Sandrock, North Carolina 6. Post-Closure Cost Estimate Notes: 1. All costs include labor by third party. 2. Water quality monitoring costs are estimated from 2019 budgets. 3. Cost for groundwater wells assumes maintenance of each well every other year. 4. Cost for the gas probes assumes maintenance of each probe every other year. 5. Cost for routine maintenance assumes 1/10 of the cap area will require reseeding and fertilizing each year. 6. Post Closure Care includes all permitted Phases 1, 2, 3A. 7. Future Phases issued PTO will be added to the closure & Post Closure Care Plans. END ITEM UNIT QUANTITY UNIT COST ANNUAL COST INSPECTIONS/ RECORD KEEPING per trip 4 500.00$ 2,000.00$ MONITORING Explosive gases (quarterly)per trip 4 400.00$ 1,600.00$ Groundwater/Surfacewater (semi-annually) Sampling per trip 2 3,000.00$ 6,000.00$ Analysis per trip 2 3,000.00$ 6,000.00$ Reporting per trip 2 2,700.00$ 5,400.00$ Subtotal 19,000.00$ ROUTINE MAINTENANCE (third party) Mowing ($35/acre) 2 times a year acre 36.6 1,281.00$ 46,884.60$ Reseeding & Fertilize(5)acre 1.8 1,500.00$ 2,700.00$ Vector and Rodent Control acre 18.3 25.00$ 457.50$ Subtotal 50,042.10$ WELL MAINTENANCE Groundwater Wells lump sum 1 500.00$ 500.00$ Gas Detection Probes lump sum 1 250.00$ 250.00$ Subtotal 750.00$ CAP REPAIR lump sum 1 5,000.00$ 5,000.00$ TOTAL OF ABOVE ITEMS 76,792.10$ ENGINEERING --3%2,303.76$ CONTINGENCY --5%3,839.61$ TOTAL ANNUAL POST-CLOSURE COST (IN 2019 DOLLARS)82,935.47$ TOTAL 30 YEAR POST-CLOSURE COST (IN 2019 DOLLARS)2,488,064.04$ V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 8 May 2019 Coble’s Sandrock, North Carolina APPENDIX A GROUNDWATER MONITORING WELL MAINTENANCE RECORD FACILITY: WELL #: LOCATION: DATE: INSPECTOR: COMPANY: 1. Is surface water diverted away from the wellhead? 2. Is the concrete pad still intact and free of cracks? 3. Has surface water runoff undercut the concrete pad? 4. Is the outer casing still secure and locked? 5. Is the well identification tag present and is it legible? a. Does the well identification tag provide the following information:  The well identification number?  Drilling contractor name and registration number?  Total depth of well?  Depth to screen?  A warning that the well is not for water supply and that the ground water may contain hazardous materials. 6. Is the grout between the inner and outer well casings all the way to the ground surface? 7. Is the inner casing firmly grouted in place? 8. Are the inner and outer casings upright and unobstructed? 9. Is water collecting in the outer casing? Does a weep hole need to be bored in the outer casing to provide drainage? 10. Is the monitoring well accessible by a four-wheel drive vehicle? 11. Have brush and weeds been trimmed so that the well is easy to locate and access? 12. Does the inner well casing have a vented cap? 13. Is the monitoring well visible and adequately protected from moving equipment? V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 9 May 2019 Coble’s Sandrock, North Carolina APPENDIX B POST-CLOSURE INSPECTION RECORD FACILITY: WELL #: LOCATION: DATE: INSPECTOR: COMPANY: 1. Access and Security Control o Is a notice prohibiting the further disposal of waste materials clearly visible at the entrance to the facility? o Is the site adequately secured by means of gates, chains, berms, fences or other security measures to prevent unauthorized entry? o Are the access roads to and within the site maintained to provide access to the closed disposal area and to all monitoring points? 2. Erosion and Sediment Control o Is the vegetation adequate to stabilize the site and prevent erosion? o Are the erosion control measures adequate to prevent silt from leaving the site and to prevent excessive on-site erosion? o Do the sediment basins require cleaning out, as indicted by the level of sediment buildup? 3. Drainage Control Requirements o Are all areas adequately sloped to promote surface water runoff in a controlled manner? o Are there areas of observed settlement, subsidence, and/or displacement of the closure cap? o Are all drainage channels free of accumulated sediment? 4. Uncontrolled Escape of Leachate or Landfill Gas o Are there any leachate seeps observed? o Are there any signs of uncontrolled releases of landfill gas? 5. Environmental Monitoring Systems o Are all monitoring wells (gas and groundwater) properly maintained? (Note: Complete the Groundwater Monitoring Well Maintenance Record during semiannual sampling events.) 6. Miscellaneous o Are all site benchmarks marked and evident? o Do vector control measures appear adequate? V – Closure & Post-Closure Care Plan Labella Associates, PC C&D LF 5-Year Permit Renewal/LOS 10 May 2019 Coble’s Sandrock, North Carolina APPENDIX C METHANE MONITORING TEST REPORT Facility: Location: Date of Test: Weather Condition: Temperature: Barometric Pressure: Sampling Personnel: Monitoring Point Description/Location Time Methane Concentration (% of LEL) Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 WATER QUALITY MONITORING PLAN COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01 -05 VI - Water Quality Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina i TABLE OF CONTENTS 1.0 INTRODUCTION ..................................................................................................................... 1 1.1 Local and Regional Hydrogeology................................................................................................... 1 1.1.1 Site Groundwater Flow Regime ................................................................................... …...1 2.0 GROUNDWATER MONITORING PLAN .................................................................................... 2 2.1 Introduction and Purpose ................................................................................................................ 2 2.2 Groundwater Monitoring Network ................................................................................................... 2 2.2.1 Background and Compliance Monitoring Wells .......................................................... ……3 2.2.2 Installation and Maintenance of Groundwater Monitoring Network .......................... ……3 2.3 Groundwater Monitoring .................................................................................................................. 4 2.3.1 Establishment of Background Data ............................................................................ ……4 2.3.2 Groundwater Sampling Methodology .......................................................................... ……4 2.3.3 Sample Analysis Requirements .................................................................................... ……8 3.0 COMPARISONS TO THE NC 2L AND GWPS ............................................................................ 9 4.0 STATISTICAL ANALYSES ........................................................................................................ 10 4.1 Treatment of Censored Data ...................................................................................................... 10 4.2 Assumption of Normality ............................................................................................................ 10 4.3 Parametric Upper Tolerance Limit ............................................................................................. 10 4.4 Aitchison’s Adjusted Parametric Upper Prediction Limit .......................................................... 10 4.5 Non-parametric Upper Tolerance Limit ..................................................................................... 11 4.6 Poisson Upper Prediction Limit .................................................................................................. 11 5.0 Surface Water Monitoring ...................................................................................................... 11 6.0 Ability to Effectively Monitor Releases from Proposed C&D Areas ....................................... 11 6.1 Point of Compliance 11 7.0 REFERENCES 12 VI - Water Quality Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina ii TABLES Table 1 October 2018 Estimated Hydraulic Gradients Table 2 Summary of Well Construction FIGURE Figure 1 Site Location Map DRAWINGS Drawing 1 October 2018 Groundwater Contour Map Drawing 2 Coble's Sandrock Site Layout Map APPENDICES Appendix A Forms Appendix B NCSWR Appendix I and II List of Constituents VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 1 1.0 INTRODUCTION In accordance with the NC Solid Waste Management Rules (NCSWMR) § .0538, Coble’s Sandrock is submitting this Water Quality Monitoring Plan (WQMP) as part of our five years permit renewal for the Coble’s Sandrock Construction and Demolition Debris (C&D) Landfill in Alamance County, North Carolina (Permit # 01-05) (the Site). The purpose of this WQMP is to serve as a guidance document for collecting and analyzing groundwater and surface water samples The facility consists of approximately 154 acres in Alamance County, one half mile east of Kimesville, North Carolina and approximately eight miles south of Burlington, North Carolina. The 154 acres includes the currently permitted 39.6 acres plus an adjacent expansion area of 114.4 acres. The existing C&D facility has been in operation since 1998. The site location is shown on Figure 1. Property boundaries, surrounding topography, and locations of the existing Phases. 1.1 Local and Regional Hydrogeology The Site is located within the Carolina Slate Belt in the central Piedmont physiographic and geological province. Geologic unit designations and descriptions used in this report are defined in The Central Piedmont (Butler and Secor, 1991). The Carolina Slate Belt is made up of metamorphosed sediments, volcanics, and intrusive igneous rocks. The Site is underlain by a felsic intrusive complex. The map legend describes the complex as white to gray, fine- to coarse-grained, massive to foliated, metamorphosed bodies of assemblages of intimately associated felsic intrusive rock types. The rock types vary from granite, granodiorite, quartz diorite, to quartz monzonite. Narrow mafic dikes are common within the felsic intrusive units. This region is also characterized by regional- and small-scale Mesozoic diabase dikes. Most of the dikes are near-vertical in dip and trend north-south to northwest- southeast and are characterized by plagioclase, augite and olivine (Ragland, 1991). 1.1.1 Site Groundwater Flow Regime The surficial aquifer beneath the site occurs within saprolite, partially weathered rock (PWR), and bedrock. Generally, the saprolite and PWR units are relatively thin (5 to 40 feet thick). The saprolite and PWR are expected to behave as a relatively isotropic, porous medium, whereas groundwater flow in the bedrock is primarily through fractures; however, the bedrock is highly fractured and well connected to the overlying units so they are expected to behave as a single aquifer. The groundwater potentiometric surface, based on water level readings taken on October 9, 2018, is shown on Drawing 1. Groundwater flow directions conform to the potentiometric surface, with flow perpendicular to the contours. 1.1.2 Horizontal Gradient and Velocity Calculations Horizontal hydraulic gradients for the proposed C&D disposal areas were calculated using two groundwater flow line segments indicated on the groundwater surface contour map (Drawing 1). Average linear groundwater flow velocities were calculated using the following modified Darcy equation: V = Ki/n VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 2 where: V = average linear velocity (feet per day), K = hydraulic conductivity (ft/day), i = horizontal hydraulic gradient, and n = effective porosity. An effective porosity of n = 0.21 (21%) was assumed based on average effective porosities for saprolite and PWR determined by laboratory analysis of soil samples. The average gradients (i) were determined for each flow path shown on Drawing 1. The geometric mean of the hydraulic conductivities of all slug test conducted on the Site (K = 1.97 x 10-1 ft/day) was used for groundwater flow calculations for the site. The above equation makes the simplifying assumptions of a homogeneous, isotropic aquifer in a porous medium. Groundwater flow velocities were calculated using saprolite and PWR data because the site’s uppermost aquifer is primarily in those hydrogeologic units. An average linear groundwater flow velocity was calculated across areas where bedrock is the surficial aquifer because rock cores have shown that bedrock is highly fractured to the point that groundwater flow is expected to behave relatively similar to the unconsolidated hydrogeologic units. Also, aquifer tests conducted on bedrock wells and piezometers showed similar range of values for hydraulic conductivity. Groundwater flow velocities within the fractured bedrock aquifer are likely to be variable. Data and calculations for the horizontal gradients are presented in Table 1. The calculated horizontal gradients from two flow line segments across the site range from 0.027 to 0.055. Calculated linear groundwater velocities ranged from approximately 135 to 276.36 feet/year. 2.0 GROUNDWATER MONITORING PLAN 2.1 Introduction and Purpose This plan shall replace any previous groundwater monitoring plans that may have been submitted for Coble’s Sandrock C&D Landfill. This Groundwater Monitoring Plan will serve as a guidance document for collecting and analyzing groundwater and surface water samples, managing the associated analytical results, and monitoring for potential releases to the uppermost aquifer from the Coble’s Sandrock C&D Landfill. The plan complies with NCSWMR § .0540, which specifies the requirements for groundwater and surface water monitoring at C&D landfills. The plan also addresses the specific issues addressed in the Solid Waste Section’s January 1995 policy memorandum (Re: Sampling and Analysis Requirements, Construction and Demolition Landfills and Closed Sanitary Landfills) and the May 29, 2018 policy memorandum (1,4-Dioxane Analysis, Solid Waste Section Limits, and Laboratory Analytical Methods). 2.2 Groundwater Monitoring Network The groundwater monitoring network is designed to monitor for potential releases to the uppermost aquifer at the Site. A summary of well construction specifications, well status, and the role of each well in the proposed monitoring plan is provided in Table 2. VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 3 2.2.1 Background and Compliance Monitoring Wells The table below lists the monitoring wells associated with the Site monitoring program and their classification within the Groundwater Monitoring Network. At the present there are 11 groundwater monitoring wells associated with Site monitoring program. Monitoring well MW- 6 is used as an upgradient/background well. Monitoring wells MW-2, MW-4, MW-7, MW-8, MW-10, and P-19S are monitored as compliance wells. Monitoring wells MW-5, MW-10D and P-19D are used to obtain groundwater levels. Monitoring well MW-11, was installed northwest of the Phase 3B disposal area. The well was installed approximately 400 feet north of piezometer P-16. Nevertheless, the well was installed too shallow and is being reported dry; therefore, no groundwater have been collected from it. The approximate locations of the monitoring wells are presented in Drawing 2. All wells are sampled semiannually. Monitoring Well Date Installed Classification Monitoring Program Total Depths from TOC (feet) Lithology of Screen Interval MW-2 03/28/97 Compliance Well Detection 22.0 Saprolite/PWR MW-4 04/01/97 Compliance Well Detection 21.3 Saprolite/PWR MW-5 01/18/02 Observation Water Level Only 15.0 Saprolite/PWR MW-6 (P-3) 08/05/97 Background Well Detection 41.0 Bedrock MW-7 12/19/02 Compliance Well Detection 13.5 Saprolite/PWR MW-8 03/21/05 Compliance Well Detection 20.0 Saprolite/PWR MW-10S 03/22/05 Compliance Well Detection 21.5 Bedrock MW-10D 03/25/05 Observation Water Level Only 64.0 Bedrock MW-11 12/22/17 Compliance Well Detection 24.0 Bedrock P-19S 01/31/02 Compliance Well Detection 10.0 Saprolite P-19D 01/31/02 Observation Water Level Only 60.0 Bedrock Note: TOC = Top of Casing 2.2.2 Installation and Maintenance of Groundwater Monitoring Network The existing monitoring wells will be used and maintained in accordance with design specifications throughout the life of the monitoring program. The specifications are outlined in 15A NCAC Subchapter 2C, Section .0100. Routine well maintenance will include inspection and correction/repair of, as necessary, identification labels, concrete apron condition, locking caps and locks, and access to the wells. Coble Sandrock will re-evaluate the monitoring network, and provide recommendations to the Division of Waste Management (DWM) for modifying, rehabilitating, abandoning, or installing replacement or additional monitoring wells, as appropriate. VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 4 Monitoring well, MW-11, was installed too shallow and is being reported dry since its installation; therefore, a replacement well (MW-11R) will be installed in the approximate location show in Drawing 2. After its installation the well will become part of the monitoring program and will be sampled as a compliance well. The replacement well MW-11R will be installed and developed, and background data will be collected prior to any waste being received into Phase 3B. 2.3 Groundwater Monitoring Groundwater samples from the facility will be collected and analyzed for the constituents listed in Appendix I of 40 CFR Part 258, plus 1.4-Dioxine, mercury, chloride, manganese, sulfate, iron, alkalinity, Tetrahydrofuran (THF), and total dissolved solids. In addition, field analyses for pH, temperature, dissolved oxygen (DO), Oxidation-Reduction Potential (ORP), and specific conductance will be performed for each sample. The laboratory analytical results and field parameters will be submitted to the Solid Waste Section at least semiannually. Any exceedances of the 15A NCAC 2L (NC 2L) groundwater standards will be identified in the semiannual submittals. 2.3.1 Establishment of Background Data A minimum of four independent groundwater samples will be collected from any new compliance wells prior to the start of disposal operations in their respective areas at the Coble Sandrock’s C&D landfill facility. These data will be evaluated statistically to determine background concentrations for each well. 2.3.2 Groundwater Sampling Methodology Groundwater samples will be collected in accordance with Solid Waste Management Rules 15A NCAC 13B .1632 and the Solid Waste Section: Guidelines for Groundwater, Soil, and Surface Water Sampling (NCDEQ SWSL, 2008, 2) and are incorporated by reference. . Details of well purging, sample withdrawal, and decontamination methods, as well as chain- of-custody procedures are outlined below. 2.3.2.1 Static Water Levels The distance from the top of the well casing to the water surface and to the bottom of the well will be measured using an electronic water level meter. Static water elevations and the total well depth will be measured to the nearest 0.01 of a foot in each well prior to the sampling of each well. Other measuring method could be used only if depth to water could be measured to the nearest 0.01 of a foot (e.g. wetted-tape method). Reference elevations of the proposed wells have been obtained from a North Carolina registered land surveyor. 2.3.2.2 Purging and Sampling Methodology- Low-Yield Well A low-yield well (one that is incapable of yielding three well volumes within a reasonable time) will be purged so that water is removed from the bottom of the screened interval. Low- yield wells will be evacuated to dryness once. Minimum Purge Sampling could also be used as an alternate sampling method. The minimum purge approach requires the removal of the smallest possible purge volume prior to sampling, generally limited to three volumes of the sampling system. As soon as the well recharges or within 24 hours, the first sample will be field tested for pH, temperature, dissolved oxygen (DO), Oxidation-Reduction Potential (ORP), and specific conductance. Samples will then be collected and containerized in the VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 5 following order unless field conditions justify other sampling regimens (NCDEQ SWSL, 2008). 1. Volatile Organics and Volatile Inorganics 2. Extractable Organics, Petroleum Hydrocarbons, Aggregate Organics and Oil and Grease 3. Total Metals 4. Inorganic Nonmetallics, Physical and Aggregate Properties, and Biologicals 5. Microbiological (i.e., total organic then total metals). 2.3.2.3 Purging and Sampling Methodology- High-Yield Well A high-yield well (one that is capable of yielding more than three well volumes during continuous purging) will be purged so that water is drawn down from the uppermost part of the water column to ensure that fresh water from the formation will move upward in the screen. At no time will a well be evacuated to dryness if the recharge rate causes the formation water to vigorously cascade down the sides of the screen, which could cause an accelerated loss of volatiles. A minimum of three well volumes will be evacuated from high-yield wells prior to sampling. A well volume is defined as the water contained within the well casing and pore spaces of the surrounding filter pack. The well volume will be calculated using the following formulas: Vc = (dc2/4) x3.14 x hw x 7.48 gallons/cubic foot Vc (gallons) = 0.163 x hw where: Vc = volume in the well casing dc = casing diameter in feet (dc = 0.167 for a 2-inch well) hw = height of the water column (i.e., well depth minus depth to water) Each well will be purged and sampled with a disposable bailer. The bailer will be lowered gently into the well to minimize the possibility of causing degassing of the water. If sampled with a pump, flow rates will be regulated to minimize turbidity and degassing of the water or if suitable, Low-Stress (Low-Flow) methodology may be used (USEPA, 2017). All equipment used for sampling will be handled in such a manner to ensure that the equipment remains decontaminated prior to use. In between wells and following completion of the field sampling, the electronic depth meter will be decontaminated following the manufacturer recommended procedure. Clean disposable gloves will be worn by sampling personnel. To reduce the potential of cross-contamination, the upgradient/background well will be sampled first, followed by the downgradient wells. The order of sampling of the downgradient wells will be evaluated each sampling event to provide a sequence going from less contaminated to more contaminated based on the previous sampling event, if applicable. VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 6 During well purging and before sampling, monitor indicator field parameters (turbidity, temperature, specific conductance, pH, ORP, DO) readings will be collected. Field parameters will be collected after each well volume or at the recommended interval as described in the Low-Stress (Low-Flow) methodology. The direct reading equipment used at each well will be calibrated according to the manufacturer's specifications prior to each sampling event. Calibration records shall be completed after each calibration. Groundwater samples will be collected and containerized in the order of the volatilization sensitivity (i.e., volatile organic compounds {VOCs} first, followed by the metals). 2.3.2.3 Sample Collection, Bottling, and Transportation Pre-preserved sample containers will be supplied by the laboratory. The VOC vials will be filled in such a manner that no headspace remains after filling. Immediately upon collection, all samples will be placed in coolers on ice where they will be stored prior to/and during transit to the laboratory. In between wells and following completion of the field sampling, the electronic depth meter will be decontaminated using the following procedure. 1) Phosphate-free soap and distilled water wash; 2) Distilled water rinse; 3) Air dry. Pre-preserved sample containers are properly prepared by the analytical laboratory scheduled to perform the analysis. No cleaning or preparation of sampling bottles by field personnel should be performed. The VOC vials will be filled in such a manner that no headspace remains after filling. Immediately upon collection, all samples will be placed in coolers on ice where they will be stored prior to and during transit to the laboratory. Samples collected will be properly containerized, packed into pre-cooled coolers, and either hand-delivered or shipped via overnight courier to the laboratory for analysis. The chain-of custody program will allow for tracing of possession and handling of samples from the time of field collection through laboratory analysis. The chain-of-custody program will include sample labels and seals, field logs, chain-of-custody records, commercial carrier’s package bill, and laboratory logs. Labels sufficiently durable to remain legible when wet will contain the following information: • Job and sample identification number; • Monitoring well number or other location; • Date and time of collection; • Name of collector; • Parameter to be analyzed; and • Preservative, if applicable. The shipping container will be sealed to ensure that the samples have not been disturbed during transport to the laboratory. The tape is labeled with instructions to notify the shipper if the seal is broken prior to receipt at the laboratory. If the sample cannot be analyzed VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 7 because of damage or disturbance, whenever possible, the damaged sample will be replaced during the same compliance period. The field log will contain sheets documenting the following information: • Identification of the well; • Well depth; • Static water level depth; • Presence of immiscible layers, odors or other indications of potential contamination; • Well yield-high or low; • Purge volume (given in gallons or number of bailers); • Time well was purged; • Date and time of collection; • Well sampling sequence; • Types of sampling containers used and sample identification numbers; • Preservative used; • Field analysis data and methods; • Field observations on sampling event; • Name of collector(s); • Internal temperature of shipping container at the time of sample placement; and • Climatic conditions including air temperatures. A sample field log sheet for groundwater is provided in Appendix 1. The chain-of-custody record is required to establish the documentation necessary to trace sample possession from time of collection to time of receipt at destination. A chain-of- custody record will accompany each individual shipment. The record will contain the following information: • Sample destination and transporter; • Sample identification numbers; • Signature of collector; • Date and time of collection; • Sample type; • Identification of well; • Number of sample containers in shipping container; VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 8 • Parameters requested for analysis; • Signature of person(s) involved in the chain of possession; • Inclusive dates of possession; and • Internal temperature of shipping container upon opening in laboratory (noted by the laboratory). A copy of the completed chain-of-custody sheet will accompany the shipment and will be returned to the shipper with the analytical results. The chain of custody record will also be used as the analysis request sheet. A sample of a completed chain-of-custody form is included in Appendix 1. 2.3.2.4 Field and Trip Blanks A field/equipment blank will be collected and analyzed during each sampling event to verify that the sample collection and handling processes have not affected the integrity of the field samples. The field/equipment blank will be prepared in the field from lab pure water (Type II reagent grade water) supplied by the laboratory. One field/equipment blank will be prepared for each sampling event. The field/equipment blank will be generated by exposing the lab pure water to the sampling environment and sampling equipment/media in the same manner as actual field samples being collected. The lab will provide appropriate sample containers for generation of the field/equipment blank(s). The field/equipment blank will be subjected to the same analysis(es) as the groundwater samples. As with all other samples, the time(s) of the field/equipment blank collection will be recorded so that the sampling sequence is documented. The field/equipment blank monitors for contamination from the sampling equipment/media, or from cross-contamination that might occur between samples and sample containers as they are opened and exposed to the sampling environment. Whenever groundwater samples are being collected for volatiles analysis, a trip blank will be generated by the laboratory prior to shipment of sampling containers and coolers to the field. The same lab pure water as above shall be used. The trip blank shall be transported with the empty sampling containers to the field, but will not be opened at any time prior to analysis at the laboratory. The trip blank will accompany the groundwater samples in the cooler(s) back to the laboratory and will be analyzed by the same volatile methods as the associated field samples. The trip blank monitors for potential cross-contamination that might occur between samples or that may be a result of the shipping environment. Detectable levels of contaminants found in the field/equipment blanks or trip blanks will not be used to correct the groundwater data, but will be noted accordingly. Contaminants present in trip blanks or field/equipment blanks at concentrations within an order of magnitude of those observed in the corresponding groundwater samples may be cause for resampling. 2.3.3 Sample Analysis Requirements 2.3.3.1 Analytical Requirements Analysis of groundwater and surface water samples from the facility will be conducted by a laboratory certified by the NCDEQ. Analyses will be performed in accordance with U.S. EPA VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 9 SW 846 methods. Both groundwater and surface water samples will be analyzed for the constituents listed in Appendix I of 40 CFR Part 258, plus 1.4-Dioxine, mercury, chloride, manganese, sulfate, iron, alkalinity, and total dissolved solids. Appendix 2 includes a table of all NCSWMR Appendix I and Appendix II of the Title 40 of the Code of Federal Regulations (CFR) Part 258 (40 CFR 258, Appendix II), which was incorporated by reference (15A NCAC 13B .0830) to the NCSWMR (NCSWMR Appendix II) constituents with their respective analytical methods, CAS numbers, 15A NCAC 2L (NC 2L) groundwater standards, and groundwater protection standards (GWPS). All limits and standards are current as of the submittal date of the WQMP. 2.3.3.2 Reporting and Record Keeping The laboratory analytical results will be submitted to the Solid Waste Section at least semiannually. The following measurements, analytical data, calculations, and other relevant groundwater monitoring records will be kept throughout the active life of the facility and the post-closure care period: • Records of all groundwater quality data; • Associated sample collection field logs and measurements, such as static water level measured in compliance wells at the time of sample collection; and • Notices and reports of NC 2L exceedances, reporting or data error, missing data, etc. 2.3.3.3 Well Abandonment An activities monitoring well within the monitoring network will be properly abandoned following the procedures for permanent abandonment described in 15A NCAC 2C Rule .0113(d). Prior to abandonment, approval must be received from the NCDEQ SWS and will also be certified by a licensed geologist. 3.0 COMPARISONS TO THE NC 2L AND GWPS Groundwater analytical results will be compared to the NC 2L Standards established by 15A NCAC 2L.0202. For constituents without NC 2L Standards, the groundwater samples shall be compared to the GWPS established by the SWS. Unless otherwise established by NCDEQ, the standards for all constituents shall be equal to their respective NC 2L or GWPS (see Appendix 2), unless the NC 2L or GWPS is below the method detection limit, in which case the standard shall be equal to the method detection limit. If a statistically-determined background concentration for a constituent is greater than the applicable NC 2L or GWPS, the background may be considered the standard for comparison with NCDEQ approval. The initial comparison will be performed using a value-to-value procedure. If an analyte is detected above the NC 2L or GWPS in a given sampling event, confidence limits may be calculated based on the most recent four sampling events, and if the lower confidence limit is not above the NC 2L or GWPS, the detection shall not be considered a statistically significant level compared to the NC 2L or GWPS. If an analyte is detected below the NC 2L or GWPS, even if it is a quantifiable concentration, compliance action will not be required. If a suspect NC 2L or GWPS exceedance is noted during the value-to-value comparison, a confirmation sample may be collected. The results from a confirmation VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 10 sample will be compared to the NC 2L or GWPS in a value-to-value comparison, or the value may be statistically compared to background. 4.0 STATISTICAL ANALYSES If statistical analysis is performed to stablish background values for any constituents, the background data are to be evaluated through the use of Parametric Prediction Limits, Parametric Tolerance Intervals, Non-Parametric Prediction Limits, or Poisson Prediction Limits as appropriate. Tests for normality, outliers, Aitchison’s adjustment, tolerance intervals, or prediction limits are to be included as appropriate based on the background data. This is done in accordance with the procedure summarized in the USEPA Unified Guidance document (USEPA, 2009). The statistical test by which downgradient data are compared to facility background data is based upon the nature of the data and the number of data values that are less than the laboratory limit of detection. All statistical tests are evaluated at the 0.05 level of significance, 95% confidence level, and are conducted as one-tailed tests. These methods and the criteria for their use are discussed below. 4.1 Treatment of Censored Data Generally, background data are censored as follows. When less than or equal to 15% of the background data values are less than the applicable reporting limit (NCDEQ SWSL), any data reported less than the NCDEQ SWSL will be treated as one-half the NCDEQ SWSL or the Reporting Limit as appropriate. 4.2 Assumption of Normality Prior to conducting statistical tests that are based on the assumption of normally distributed data, normality of the background data is evaluated using the Shapiro-Wilk statistic (W). Normality is assessed at the 95% confidence level. In the event that the raw data fail to follow a normal distribution, the data are transformed using a base-10 logarithm. The transformed data are then tested for normality using the Shapiro-Wilk statistic. In the event that the log-transformed data also fail to follow a normal distribution, a non-parametric approach is applied. 4.3 Parametric Upper Tolerance Limit In some cases the background data consist of a minimum of eight independent data values and less than or equal to 15% of the background data values are less than the RL for a given analyte. The downgradient values are then compared to the parametric upper tolerance limit in accordance with the procedure summarized in the USEPA guidance documents, Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities – Unified Guidance (EPA, 2009). 4.4 Aitchison’s Adjusted Parametric Upper Prediction Limit In those cases where the background data consist of a minimum of eight independent data values and more than 15%, but less than or equal to 50%, of the background data values are less than the RL for a given analyte, the mean and standard deviation are adjusted. This is done in accordance with the procedure summarized in the USEPA Unified Guidance document (USEPA, 2009). After the adjustments are made, the downgradient values are VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 11 compared to the Aitchison’s adjusted parametric upper prediction limit in accordance with the procedures summarized in the USEPA Unified Guidance document (USEPA, 2009). 4.5 Non-parametric Upper Tolerance Limit In those cases where more than 50%, but less than or equal to 90%, of the background data values are less than the RL for a given analyte or the background data fail to follow a normal or log-normal distribution, downgradient values are compared to the non-parametric upper tolerance limit. This procedure is done in accordance with the procedures summarized in the USEPA Unified Guidance documents (USEPA, 2009). 4.6 Poisson Upper Prediction Limit In those cases where more than 90% of the background data values are less than the RL for a given analyte, the downgradient values are compared to the Poisson upper prediction limit. These comparisons are made in accordance with the procedure summarized in the USEPA guidance document (USEPA, 1992). 5.0 SURFACE WATER MONITORING Two surface water monitoring points are proposed for the facility, as shown on Drawing 2. Surface water point SW-1 is located to monitor water quality in Poppaw Creek, shortly after it enters the site. The sample location is at the property line near the northwest edge of the site. Surface water monitoring point SW-2 will serve as a downstream monitoring point. Samples from this point will be collected at a location approximately 350 feet northeast of the Phase 3 disposal area near the northeastern corner of the site and where a small tributary that flows adjacent to the eastern property boundary discharges into Poppaw Creek. Samples will only be taken from flowing water and not stagnant pools. The results will be compared to the 15A NCAC 2B (NC 2B) Surface Water Standards in a value-to-value comparison. Appendix 2 includes NC 2B Surface Water Standards for NC Appendix I and II constituents. The surface water will be sampled for the constituents, as outlined above, that are required for C&D landfills and the locations will be monitored at least semiannually during the life of the facility. The results of the analysis of the surface water data will be submitted to the Solid Waste Section semiannually with the groundwater data. 6.0 ABILITY TO EFFECTIVELY MONITOR RELEASES FROM PROPOSED C&D AREAS No known or potential sources of significant contamination have been identified within 2000 feet of the property boundary. There are no known conditions, physical or hydrogeologic, which will interfere with the effective monitoring of the proposed C&D cells. The proposed Water Quality Monitoring Plan, when implemented, will be effective in providing early detection of any release of hazardous constituents to the uppermost aquifer, so as to be protective of public health and the environment. 6.1 Point of Compliance The relevant point of compliance is defined in accordance with NCSWMR § .0544.b.1.B as a point no more than 250 feet from the edge of waste and no less than 50 feet within the facility boundary, whichever is closer to the waste. Along most of the western edge of the proposed and existing waste cells, and along a small area on the northern side of the cells, VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 12 the relevant point of compliance is defined by the points 50 feet from the facility boundary. For the rest of the area around the proposed and existing waste cells, the relevant point of compliance is defined by the points 250 feet from the edge of waste. Therefore, the proposed groundwater monitoring network, which is designed to detect a release of solid waste constituents to the uppermost aquifer at the facility, meets the monitoring requirements specified under Rules .1630 through .1637 of the North Carolina Solid Waste Management Rules, Title 15A, Subchapter 13B. All proposed and existing monitoring wells are located within the relevant points of compliance. 7.0 REFERENCES Bouwer, H. and Rice, R.C., June 1976, A slug test for determining hydraulic conductivity of unconfined aquifers with completely or partially penetrating wells; Water Resources Research, American Geophysical Union, pp. 423-428. Bouwer, H., 1989, The Bouwer and Rice slug test-an update; Ground Water, vol. 27, No. 3, May-June, pp. 304 - 309. Brown, Philip M., Chief Geologist, 1985, Geologic Map of North Carolina, The North Carolina Geologic Survey, scale 1:500,000. Butler, J. Robert, and Secor, Jr., Donald T., 1991, The Central Piedmont, in Horton, J. W., Jr., and Zullo, V. A., eds., The Geology of the Carolinas: The University of Tennessee Press, p. 59- 78. Carpenter III, P. Albert, Geologic Map of Region G, North Carolina: A Guide for NC Mineral Resource Development and Land Use Planning: NC Mineral Resources Sec., Regional Geology Series 2, 76 p. Halford, Keith J., and Kuniansky, Eve L., 1998. Bower and Rice Slug Test Analysis, in: Documentation of Spreadsheets for the Analysis of Aquifer Test Data: USGS OFR 02-197. Harned, D.A., and Daniel, Charles C., III, 1989, The Transition Zone Between Bedrock and Saprolite: Conduit For Contamination?, in Ground Water in the Piedmont; Edited by Daniel, C., White, R., and Stone, P., Proceedings published by Clemson University, pp. 336-348. Heath, R.C., 1989, The Piedmont Ground-Water System, in Ground Water in the Piedmont; Edited by Daniel, C.,White, R., and Stone, P., Proceedings published by Clemson University, pp. 1-13. JEI, June 2, 2001. Request for Modification to Construction and Demolition Debris Landfill Permit No. 01-05. JEI, June 18, 2002. Construction Plan Application – Coble’s Sandrock C&D Landfill, Permit No. 01-05. North Carolina Dept. Environment, Health, and Natural Resources (NCDEHNR), 1995, Sampling and Analysis Requirements, Construction and Demolition Landfills and Closed Sanitary Landfills, N.C. Solid Waste Section. North Carolina Dept. Environment, Health, and Natural Resources (NCDEHNR), 1995, Draft N.C. Water Quality Monitoring Guidance Document for Solid Waste Facilities. VI - Water Quality Monitoring Plan LaBella Associates PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock Landfill, Permit 01-05 13 Parker, B.L. et al. May 1994. 1) A conceptual understanding of contaminant migration in fractured media, 2) Calculations and real data: fractured media. In: Dissolved Organic Contaminants in Groundwater Short Course [unpublished short course notes and published references contained therein]. Waterloo Centre for Groundwater Research, Univ. Of Waterloo, Ontario. RCRA Ground Water Monitoring Technical Enforcement Guidance Document (TEGD), 1986. Ragland, Paul C., 1991, Mesozoic Igneous Rocks, in Horton, J. W., Jr., and Zullo, V. A., eds., The Geology of the Carolinas: The University of Tennessee Press, p. 171-190. Trigon Engineering Consultants, Inc., 1997, Construction and Demolition Landfill Permit Application Siting Requirements Prepared for Coble’s Sandrock, Inc. Trigon Engineering Consultants, Inc., 1998, Construction and Demolition Landfill Permit Application and Construction Plan Application Prepared for Coble’s Sandrock, Inc. TABLES TABLE 1: October 2018 Estimated Hydraulic Gradients Average Linear Velocities Coble’s Sandrock C and D Debris Landfill Permit No. 01-05 LaBella Associate PC HORIZONTAL HYDRAULIC EFFECTIVE LINEAR GRADIENT CONDUCTIVITY POROSITY VELOCITY i K n V (ft/ft)(ft/day)(ft/yr) 620 570 600 570 Average:0.041 Average:14.04 HORIZONTAL HYDRAULIC EFFECTIVE LINEAR GRADIENT CONDUCTIVITY POROSITY VELOCITY i K n V (ft/ft)(ft/day)(ft/yr) 620 570 600 570 Average:0.041 Average:206.04 HORIZONTAL HYDRAULIC EFFECTIVE LINEAR GRADIENT CONDUCTIVITY POROSITY VELOCITY i K n V (ft/ft)(ft/day)(ft/yr) 620 570 600 570 Average:0.041 Average:1.59 NOTES: 1. The hydraulic conductivity (K) is taken from the geometric mean of K estimated from slug tests performed during hydrogeologic investigations. 2. The effective porosity (n) is taken from the average n determined by laboratory analysis of soil samples. 3. The horizontal hydraulic gradient (i) is the change in groundwater elevation divided by the segment length. 4. The groundwater flow velocity (V) is calculated based on the modified Darcy equation: V=Ki/n. GROUNDWATER ELEVATION (feet) 1.97E-01 1.97E-01 0.21 18.83 0.21 9.25 GRADIENT CALCULATION SEGMENT i 1 FLOW DIRECTION FLOW LINE LENGTH (feet) i 2 i 1 1853 NE 1853 0.027NE NE 0.055546 GRADIENT CALCULATION SEGMENT FLOW LINE LENGTH (feet) FLOW DIRECTION GROUNDWATER ELEVATION (feet) i 2 546 NE 0.055 6.89E-01 0.027 0.027 6.89E-01 0.05 135.72 0.05 FLOW DIRECTION GROUNDWATER ELEVATION (feet) i 1 1853 NE AVERAGE PWR/SAPROLITE MAXIMUM BEDROCK 2.14 MINIMUM BEDROCK 5.33E-03 0.05 1.05 i 2 546 NE 0.055 5.33E-03 276.36 0.05 GRADIENT CALCULATION SEGMENT FLOW LINE LENGTH (feet) TABLE 2: Well Construction Details Coble’s Sandrock C and D Debris Landfill Permit No. 01-05 LaBella Associates PC CASING GROUND DIAM.SURFACE DEPTH ELEV.DEPTH ELEV. inches BGS MSL BGS MSL from to from to MW-2 03/28/97 2 580.31 582.31 22.00 558.31 >22.0 <558.31 5.00 20.00 575.31 560.31 Saprolite/PWR Compliance Well MW-4 04/01/97 2 580.64 582.64 21.30 559.34 >21.3 <559.34 6.30 21.30 574.34 559.34 Saprolite/PWR Compliance Well MW-5 01/18/02 2 575.21 577.41 15.00 560.21 15.00 560.21 5.00 15.00 570.21 560.21 Saprolite/PWR Water Level Only MW-6 (P-3)08/05/97 2 652.76 652.56 41.00 611.76 16.00 636.76 21.00 41.00 631.76 611.76 Bedrock Background Well MW-7 12/19/02 2 581.08 583.33 13.50 567.58 13.50 567.58 3.50 13.50 577.58 567.58 Saprolite/PWR Compliance Well MW-8 03/21/05 2 571.50 574.26 20.00 551.50 >20.0 <551.50 5.00 20.00 566.50 551.50 Saprolite/PWR Compliance Well MW-10S 03/22/05 2 589.62 592.46 21.50 568.12 5.00 584.62 6.50 21.50 583.12 568.12 Bedrock Compliance Well MW-10D 03/25/05 2 589.90 592.76 64.00 525.90 5.00 584.90 54.00 64.00 535.90 525.90 Bedrock Water Level Only P-19S 01/31/02 2 569.18 572.18 10.00 559.18 >10.0 <559.18 4.00 10.00 565.18 559.18 Saprolite Compliance Well P-19D 01/31/02 2 569.65 571.85 60.00 509.65 10.00 559.65 45.00 60.00 524.65 509.65 Bedrock Water Level Only NOTES: All elevations are referenced to mean sea level (MSL.); depths are referenced to below ground surface (BGS) or top of casing (TOC). TOC = Top of Casing BGS = Below Ground Surface PWR = Partialy Weathered Bedrock COMMENTS LITHOLOGY OF SCREENED INTERVALELEV. MSL TOP OF BEDROCK DEPTH BGS TOTAL DEPTH DRILLED SCREENED INTERVAL WELL ID DATE INSTALLED TOC WELL ELEVATIONS feet above MSL Figure DRAWINGS 570 5 7 0 580 590 600580580 580 570 630 620 610630620600610620620630640650640 6 5 0 6 6 0 600 610 6206306 5 0 64 0 610 620 630640640 630 650 640 630620640 6306 4 0 6 5 0 6 4 0 650640 64 0 64 0 5 7 0 5705 8 059 0600610620630640650590600610620630640 610640570 570 580 63 0 650 6406 3 0 6406 5 0 610590 600 6 2 0 610600 590 580 5 7 0 570 580 5 9 0 6 0 0 6 2 0610620610 6506 4 0 6306206106306 1 0 FOSTER STORE ROAD FOSTER STORE R O A D PRIVATE DWELLING LEGEND FACILITY BOUNDARY/ PROPERTY LINE EXISTING 2' CONTOURS EXISTING 10' CONTOURS GROUNDWATER CONTOURS PERMITTED WASTE LIMITS STREAM PIEZOMETER LOCATION GROUNDWATER MONITORING WELL LOCATION AND IDENTIFICATION P-32 iSEGMENT USED FOR GRADIENT CALCULATIONS GROUNDWATER FLOW DIRECTION WITH GRADIENT CALCULATION SEGMENT i 61 0 P-34 PHASE 1A PHASE 2A 569.37 FACILITY BOUNDARY (154.20 ACRES) P-23 P-25 568.29 SW-1 PHASE 2B MW-10S MW-10D MW-8 PRIVATE DWELLING PZ-19S PZ-19D 584.68 MW-4 MW-2 MW-7 MW-5 P-24 568.43 574.28 SW-2 PHASE 3B 568.07 MW-6 623.91 EXISTING LCID DISPOSAL AREA i 567.88 NM 584.18 EXISTING LCID DISPOSAL AREA PERMITTED WASTE LIMITS NOTES 1.TOPOGRAPHIC CONTOUR INTERVAL = 2 FEET. 2.GROUNDWATER SURFACE CONTOUR INTERVAL = 10 FEET. 3.STATIC WATER LEVELS MEASURED ON 10/9/18. 4.GROUNDWATER CONTOURS BASED ON LINEAR INTERPOLATION BETWEEN AND EXTRAPOLATION FROM KNOWN DATA, TOPOGRAPHIC CONTOURS, AND KNOWN FIELD CONDITIONS. THEREFORE, GROUNDWATER CONTOURS MAY NOT REFLECT ACTUAL GROUNDWATER CONDITIONS. 5.DIGITAL MAPPING OBTAINED FROM CLIENT. 6.GROUNDWATER CONTOUR LINES SHOW THE WATER TABLE SHAPE AND ELEVATION. THESE CONTOURS ARE INFERRED LINES FOLLOWING THE GROUNDWATER SURFACE AT A CONSTANT ELEVATION ABOVE SEA LEVEL. THE GROUNDWATER FLOW DIRECTION IS GENERALLY PERPENDICULAR TO THE GROUNDWATER SURFACE CONTOURS, SIMILAR TO THE RELATIONSHIP BETWEEN SURFACE WATER FLOW AND TOPOGRAPHIC CONTOURS. FLOW PATH LENGTH i i = 1,853 LF = 546 LF PHASE 3A PROJECT NO.APPROVEDCHECKEDDRAWNDESIGNEDDATEDATEREVISIONS AND RECORD OF ISSUEBYNOAPPCKSCALE All rights reserved.Ó Joyce Engineering, Inc.DRAWING NO.L:\Coble Sandrock\dwg\GW Event Maps\Coble's Sandrock GW Map OCTOBER 2018.dwg Layout=Layout12211 W. MEADOWVIEW ROADGREENSBORO, NC 27407PHONE: (336) 323-0092NC CORP LIC: C-07822180191COBLE'S SANDROCK, INC.KIMESVILLE, NORTH CAROLINA20181 AS NOTEDGROUNDWATER SURFACE CONTOUR MAPOCTOBER 9, 2018SSRWHMVMV12/13/180 (FEET) GRAPHIC SCALE 400200100 570 5 7 0 580 590 600580580 580 570 630 620 610630620600610620620630640650640 6 5 0 6 6 0 600 610 6206306 5 0 64 0 610 620 630640640 630 650 640 630620640 6306 4 0 6 5 0 6 4 0 650640 64 0 64 0 5 7 0 5705 8 059 0600610620630640650590600610620630640 610640570 570 580 63 0 650 6406 3 0 6406 5 0 610590 600 6 2 0 610600 590 580 5 7 0 570 580 5 9 0 6 0 0 6 2 0610620610 6506 4 0 6306206106306 1 0 FOSTER STORE ROAD FOSTER STORE R O A D PRIVATE DWELLING LEGEND FACILITY BOUNDARY/ PROPERTY LINE EXISTING 2' CONTOURS EXISTING 10' CONTOURS GROUNDWATER CONTOURS PERMITTED WASTE LIMITS STREAM PIEZOMETER LOCATION GROUNDWATER MONITORING WELL LOCATION AND IDENTIFICATION P-32 iSEGMENT USED FOR GRADIENT CALCULATIONS GROUNDWATER FLOW DIRECTION WITH GRADIENT CALCULATION SEGMENT i 61 0 P-34 PHASE 1A PHASE 2A 569.37 FACILITY BOUNDARY (154.20 ACRES) P-23 P-25 568.29 SW-1 PHASE 2B MW-10S MW-10D MW-8 PRIVATE DWELLING PZ-19S PZ-19D 584.68 MW-4 MW-2 MW-7 MW-5 P-24 568.43 574.28 SW-2 PHASE 3B 568.07 MW-6 623.91 EXISTING LCID DISPOSAL AREA i 567.88 NM 584.18 EXISTING LCID DISPOSAL AREA PERMITTED WASTE LIMITS NOTES 1.TOPOGRAPHIC CONTOUR INTERVAL = 2 FEET. 2.GROUNDWATER SURFACE CONTOUR INTERVAL = 10 FEET. 3.STATIC WATER LEVELS MEASURED ON 10/9/18. 4.GROUNDWATER CONTOURS BASED ON LINEAR INTERPOLATION BETWEEN AND EXTRAPOLATION FROM KNOWN DATA, TOPOGRAPHIC CONTOURS, AND KNOWN FIELD CONDITIONS. THEREFORE, GROUNDWATER CONTOURS MAY NOT REFLECT ACTUAL GROUNDWATER CONDITIONS. 5.DIGITAL MAPPING OBTAINED FROM CLIENT. 6.GROUNDWATER CONTOUR LINES SHOW THE WATER TABLE SHAPE AND ELEVATION. THESE CONTOURS ARE INFERRED LINES FOLLOWING THE GROUNDWATER SURFACE AT A CONSTANT ELEVATION ABOVE SEA LEVEL. THE GROUNDWATER FLOW DIRECTION IS GENERALLY PERPENDICULAR TO THE GROUNDWATER SURFACE CONTOURS, SIMILAR TO THE RELATIONSHIP BETWEEN SURFACE WATER FLOW AND TOPOGRAPHIC CONTOURS. FLOW PATH LENGTH i i = 1,853 LF = 546 LF PHASE 3A PROJECT NO.APPROVEDCHECKEDDRAWNDESIGNEDDATEDATEREVISIONS AND RECORD OF ISSUEBYNO APPCK SCALE All rights reserved.Ó Joyce Engineering, Inc.DRAWING NO.L:\Coble Sandrock\dwg\GW Event Maps\Coble's Sandrock GW Map OCTOBER 2018.dwg Layout=Layout12211 W. MEADOWVIEW ROADGREENSBORO, NC 27407PHONE: (336) 323-0092NC CORP LIC: C-07822180191COBLE'S SANDROCK, INC.KIMESVILLE, NORTH CAROLINA20182 AS NOTEDSITE LAYOUT MAPSSRWHMVMV12/13/180 (FEET) GRAPHIC SCALE 400200100 Proposed MW-11R MW-11RProposed Monitoring Well Appendixes Appendix 1 Forms DATE: GROUND WATER SAMPLING LOG Project Name: Project No. /Task No.: Well ID: Sampler(s): Well Location: Well Diameter: inches Initial Depth to Water (DTW): feet Depth to Bottom (DTB): feet Water Column Thickness (WCT): feet [DTB-DTW] Calculation for One Well Volume (WV): For 2” Well: WCT X 0.163 = gallons For 4” Well: WCT X 0.653 = gallons For THREE Well Volumes: WV X 3 = gallons Actual Amount Purged/Bailed: gallons Purged with: Sampled with: Depth to Water before Sampling: feet Gallons Time Temp(°C) pH Cond. (µS/cm) Turb.(ntu) Initials Before Sampling Comments (weather conditions, odor, color, silt, etc.): Signature: ________________________________ Date: ________________________ QA/QC Sign Off: __________________________ Date: ________________________ Page 68 of 68 Appendix 2 NCSWR Appendix I and II List of Constituents NCSWMR Appendix I + II Constituents with NC-2L Standards Joyce Engineering Page 1 of 3 Revised: May 2016 NC SWSL NC 2L SWS-GWPS 1 App. I Antimony metal 7440-36-0 6010 6 -1 2 App. I Arsenic metal 7440-38-2 6010 10 10 -(RCRA METAL) 3 App. I Barium metal 7440-39-3 6010 100 700 -(RCRA METAL) 4 App. I Beryllium metal 7440-41-7 6010 1 -4 5 App. I Cadmium metal 7440-43-9 6010 1 2 -(RCRA METAL) 6 App. I Chromium metal 7440-47-3 6010 10 10 -(RCRA METAL) 7 App. I Cobalt metal 7440-48-4 6010 10 -1 8 App. I Copper metal 7440-50-8 6010 10 1,000 -EPA MCL is a secondary standard. 9 App. I Lead metal 7439-92-1 6010 10 15 -EPA MCL is an action level. (RCRA METAL) 10 App. I Nickel metal 7440-02-0 6010 50 100 - 11 App. I Selenium metal 7782-49-2 6010 10 20 -(RCRA METAL) 12 App. I Silver metal 7440-22-4 6010 10 20 -EPA MCL is a secondary standard. (RCRA METAL). 13 App. I Thallium metal 7440-28-0 6010 5.5 -0.28 14 App. I Vanadium metal 7440-62-2 6010 25 -0.3 15 App. I Zinc metal 7440-66-6 6010 10 1,000 -EPA MCL is a secondary standard. (AL)= NC2B Action Level 16 App. II Mercury metal 7439-97-6 7470 0.2 1 -(RCRA METAL) 17 App. II Tin metal 7440-31-5 6010 100 -2,000 NC SWSL NC 2L SWS-GWPS 1 App. II Cyanide inorganic 57-12-5 9012A 10 70 - 2 App. II Sulfide inorganic 18496-25-8 9030B 1,000 -- NC SWSL NC 2L SWS-GWPS 1 C&D Alkalinity inorganic SW337 SM 2320B --- 2 C&D Chloride inorganic SW301 SM 4500-Cl-E -250,000 - 3 C&D Iron metal 7439-89-6 6010 300 300 - 4 C&D Manganese metal 7439-96-5 6010 50 50 - 5 C&D Mercury metal 7439-97-6 7470 0.2 1 -(RCRA Metal) 6 C&D Sulfate inorganic 14808-79-8 300.0 250,000 250,000 - 7 C&D Total Dissolved Solids (TDS)inorganic SW311 SM 2540C -500,000 - 8 C&D Tetrahydrofuran (THF)volatile 109-99-9 8260B ---Per NCDEQ Memo dated June 25, 2010. 6 C&D pH SW-320 Field Test --- 7 C&D Temperature SW-325 Field Test --- 8 C&D Specific Conductance SW-323 Field Test --- NC SWSL NC 2L SWS-GWPS 1 App. I Acetone volatile 67-64-1 8260B 100 6,000 - 2 App. I Acrylonitrile volatile 107-13-1 8260B 200 -- 3 App. I Benzene volatile 71-43-2 8260B 1 1 - 4 App. I Bromochloromethane volatile 74-97-5 8260B 3 -0.6 5 App. I Bromodichloromethane volatile 75-27-4 8260B 1 0.6 -*MCL for total trihalomethanes 6 App. I Bromoform volatile 75-25-2 8260B 3 4 -*MCL for total trihalomethanes 7 App. I Carbon disulfide volatile 75-15-0 8260B 100 700 - 8 App. I Carbon tetrachloride volatile 56-23-5 8260B 1 0.3 - 9 App. I Chlorobenzene volatile 108-90-7 8260B 3 50 - 10 App. I Chloroethane volatile 75-00-3 8260B 10 3,000 - 11 App. I Chloroform volatile 67-66-3 8260B 5 70 -*MCL for total trihalomethanes 12 App. I Dibromochloromethane volatile 124-48-1 8260B 3 0.4 0.41 *MCL for total trihalomethanes 13 App. I 1,2-Dibromo-3-chloropropane (DBCP)volatile 96-12-8 8260B 13 0.04 - 14 App. I 1,2-Dibromoethane (EDB)volatile 106-93-4 8260B 1 0.02 - 15 App. I o-Dichlorobenzene / 1,2-Dichlorobenzene volatile 95-50-1 8260B 5 20 - 16 App. I p-Dichlorobenzene / 1,4-Dichlorobenzene volatile 106-46-7 8260B 1 6 - 17 App. I trans-1,4-Dichloro-2-butene volatile 110-57-6 8260B 100 -- 18 App. I 1,1-Dichloroethane volatile 75-34-3 8260B 5 6 - 19 App. I 1,2-Dichloroethane volatile 107-06-2 8260B 1 0.4 - 20 App. I 1,1-Dichloroethylene volatile 75-35-4 8260B 5 350 -Changed from 7 (MCL) to 350 µg/L in April 2013 (for public water supplies or drinking wells, the MCL = 7 µg/L still applies.) 21 App. I cis-1,2-Dichloroethylene volatile 156-59-2 8260B 5 70 - 22 App. I trans-1,2-Dichloroethylene volatile 156-60-5 8260B 5 100 - 23 App. I 1,2-Dichloropropane volatile 78-87-5 8260B 1 0.6 - 24 App. I cis-1,3-Dichloropropene volatile 10061-01-5 8260B 1 0.4 - 25 App. I trans-1,3-Dichloropropene volatile 10061-02-6 8260B 1 0.4 - 26 App. I Ethylbenzene volatile 100-41-4 8260B 1 600 - 27 App. I 2-Hexanone / Methyl butyl ketone (MBK)volatile 591-78-6 8260B 50 -280 28 App. I Methyl bromide / Bromomethane volatile 74-83-9 8260B 10 -10 29 App. I Methyl chloride / Chloromethane volatile 74-87-3 8260B 1 3 - 30 App. I Methylene bromide / Dibromomethane volatile 74-95-3 8260B 10 -70 31 App. I Methylene chloride / Dichloromethane volatile 75-09-2 8260B 1 5 - 32 App. I Methyl ethyl ketone / 2-Butanone (MEK)volatile 78-93-3 8260B 100 4,000 - 33 App. I Methyl iodide / Iodomethane volatile 74-88-4 8260B 10 -- 34 App. I 4-Methyl-2-pentanone / Methyl isobutyl ketone volatile 108-10-1 8260B 100 -560 35 App. I Styrene volatile 100-42-5 8260B 1 70 - 36 App. I 1,1,1,2-Tetrachloroethane volatile 630-20-6 8260B 5 -1 37 App. I 1,1,2,2-Tetrachloroethane volatile 79-34-5 8260B 3 0.2 0.18 38 App. I Tetrachloroethylene (PCE)volatile 127-18-4 8260B 1 0.7 - 39 App. I Toluene volatile 108-88-3 8260B 1 600 - 40 App. I 1,1,1-Trichloroethane volatile 71-55-6 8260B 1 200 - 41 App. I 1,1,2-Trichloroethane volatile 79-00-5 8260B 1 -0.6 42 App. I Trichloroethylene volatile 79-01-6 8260B 1 3 - 43 App. I Trichlorofluoromethane (CFC-11) volatile 75-69-4 8260B 1 2,000 - 44 App. I 1,2,3-Trichloropropane volatile 96-18-4 8260B 1 0.005 - 45 App. I Vinyl acetate volatile 108-05-4 8260B 50 -88 46 App. I Vinyl chloride volatile 75-01-4 8260B 1 0.03 - 47 App. I Xylenes (total) volatile see note 8260B 5 500 -Includes o-xylene, p-xylene, and unspecified xylenes [dimethyl benzenes (CAS RN 1330-20-7]. NC SWSL NC 2L SWS-GWPS 48 App. II Acetonitrile (methyl cyanide)volatile 75-05-8 8260B 55 -42 49 App. II Acrolein volatile 107-02-8 8260B 53 -4 50 App. II Allyl chloride (3-chloroprene)volatile 107-05-1 8260B 10 -- 51 App. II Chloroprene volatile 126-99-8 8260B 20 -- 52 App. II m-Dichlorobenzene / 1,3-Dichlorobenzene volatile 541-73-1 8260B 5 200 - 53 App. II Dichlorodifluoromethane volatile 75-71-8 8260B 5 1,000 - 54 App. II 1,3-Dichloropropane volatile 142-28-9 8260B 1 -- 55 App. II 2,2-Dichloropropane volatile 594-20-7 8260B 15 -- 56 App. II 1,1-Dichloropropene volatile 563-58-6 8260B 5 -- 57 App. II Isobutyl alcohol volatile 78-83-1 8260B 100 -- 58 App. II Methacrylonitrile volatile 126-98-7 8260B 100 -- 59 App. II Methyl methacrylate volatile 80-62-6 8260B 30 -25 60 App. II Propionitrile volatile 107-12-0 8260B 150 -- 61 App. II 1,2,4-Trichlorobenzene volatile 120-82-1 8260B 10 70 70 62 App. II Naphthalene volatile 91-20-3 8260B or 8270C 10 6 - 63 App. II Hexachlorobutadiene semivolatile 87-68-3 8270C or 8260B 10 0.4 0.44 64 App. II Ethyl methacrylate semivolatile 97-63-2 8270C or 8260B 10 -- NC - Additional Constituents for C&D Landfills NOTESNumber ANALYTE CLASS CAS RN ANALYTICAL METHOD GROUNDWATER STANDARDS (µg/L)NC App. #ANALYTE GROUNDWATER STANDARDS (µg/L)ANALYTE CLASS CAS RNNC App. # ANALYTICAL METHOD NOTES Number NC App. #ANALYTE CLASS CAS RN ANALYTICAL METHOD NOTES Number NC App. #ANALYTE CLASS CAS RN ANALYTICAL METHOD ANALYTICAL METHOD CLASS CAS RN Number NC App. I & II - Total Metals NC App. II - Cyanide/ Sulfide NC App. I & II - Method 8260 GROUNDWATER STANDARDS (µg/L) GROUNDWATER STANDARDS (µg/L) NC App. II - Method 8260 GROUNDWATER STANDARDS (µg/L)NC App. # NOTES NOTESNumber NCSWMR Appendix I + II Constituents with NC-2L Standards Joyce Engineering Page 2 of 3 Revised: May 2016 NC SWSL NC 2L SWS-GWPS 1 App. II Acenaphthene semivolatile 83-32-9 8270C 10 80 - 2 App. II Acenaphthylene semivolatile 208-96-8 8270C 10 200 - 3 App. II Acetophenone semivolatile 98-86-2 8270C 10 -700 4 App. II 2-Acetylaminofluorene semivolatile 53-96-3 8270C 20 -- 5 App. II 4-Aminobiphenyl semivolatile 92-67-1 8270C 20 -- 6 App. II Anthracene PAH 120-12-7 8270C 10 2,000 - 7 App. II Benz[a]anthracene; Benzanthracene PAH 56-55-3 8270C 10 0.05 - 8 App. II Benzo[b]fluoranthene PAH 205-99-2 8270C 10 0.05 - 9 App. II Benzo[k]fluoranthene PAH 207-08-9 8270C 10 0.5 - 10 App. II Benzo[g,h,i]perylene PAH 191-24-2 8270C 10 200 - 11 App. II Benzo[a]pyrene PAH 50-32-8 8270C 10 0.005 - 12 App. II Benzyl alcohol semivolatile 100-51-6 8270C 20 -700 13 App. II Bis(2-chloroethoxy)methane semivolatile 111-91-1 8270C 10 -- 14 App. II Bis(2-chloroethyl)ether semivolatile 111-44-4 8270C 10 -0.031 15 App. II Bis(2-chloro-1-methylethyl)ether semivolatile 108-60-1 8270C 10 --Bis (2-chloroisopropyl) ether 16 App. II Bis(2-ethylhexyl)phthalate semivolatile 117-81-7 8270C 15 3 - 17 App. II 4-Bromophenyl phenyl ether semivolatile 101-55-3 8270C 10 -- 18 App. II Butyl benzyl phthalate semivolatile 85-68-7 8270C 10 1,000 - 19 App. II p-Chloroaniline (4-Chloroaniline)semivolatile 106-47-8 8270C 20 -- 20 App. II Chlorobenzilate semivolatile 510-15-6 8270C 10 -- 21 App. II p-Chloro-m-cresol (4-chloro-3-methylphenol)semivolatile 59-50-7 8270C 20 -- 22 App. II 2-Chloronaphthalene semivolatile 91-58-7 8270C 10 -- 23 App. II 2-Chlorophenol semivolatile 95-57-8 8270C 10 0.4 - 24 App. II 4-Chlorophenyl phenyl ether semivolatile 7005-72-3 8270C 10 -- 25 App. II Chrysene PAH 218-01-9 8270C 10 5 - 26 App. II m-Cresol (3-Methylphenol)semivolatile 108-39-4 8270C 10 400 - 27 App. II o-Cresol semivolatile 95-48-7 8270C 10 -400 28 App. II p-Cresol (4-Methylphenol)semivolatile 106-44-5 8270C 10 40 - 29 App. II Diallate semivolatile 2303-16-4 8270C 10 -- 30 App. II Dibenz[a,h]anthracene PAH 53-70-3 8270C 10 0.005 - 31 App. II Dibenzofuran semivolatile 132-64-9 8270C 10 -28 32 App. II Di-n-butyl phthalate semivolatile 84-74-2 8270C 10 700 - 33 App. II 3,3'-Dichlorobenzidine semivolatile 91-94-1 8270C 20 -- 34 App. II 2,4-Dichlorophenol semivolatile 120-83-2 8270C 10 -0.98 35 App. II 2,6-Dichlorophenol semivolatile 87-65-0 8270C 10 -- 36 App. II Diethyl phthalate semivolatile 84-66-2 8270C 6,000 6,000 - 37 App. II O,O-Diethyl O-2-pyrazinyl phosphorothioate OP pesticide 297-97-2 8270C 20 --Thionazine 38 App. II Dimethoate OP pesticide 60-51-5 8270C 20 -- 39 App. II p-(Dimethylamino)azobenzene semivolatile 60-11-7 8270C 10 -- 40 App. II 7,12-Dimethylbenz[a]anthracene semivolatile 57-97-6 8270C 10 -- 41 App. II 3,3'-Dimethylbenzidine semivolatile 119-93-7 8270C 10 -- 42 App. II 2,4-Dimethylphenol (M-xylenol)semivolatile 105-67-9 8270C 10 100 - 43 App. II Dimethyl phthalate semivolatile 131-11-3 8270C 10 -- 44 App. II m-Dinitrobenzene semivolatile 99-65-0 8270C 20 -- 45 App. II 4,6-Dinitro-o-cresol (2-methyl 4,6-dinitrolphenol)semivolatile 534-52-1 8270C 50 -- 46 App. II 2,4-Dinitrophenol semivolatile 51-28-5 8270C 50 -- 47 App. II 2,4-Dinitrotoluene semivolatile 121-14-2 8270C 10 -0.1 48 App. II 2,6-Dinitrotoluene semivolatile 606-20-2 8270C 10 -- 49 App. II Di-n-octyl phthalate semivolatile 117-84-0 8270C 10 100 - 50 App. II Diphenylamine semivolatile 122-39-4 8270C 10 -- 51 App. II Disulfoton OP pesticide 298-04-4 8270C 10 0.3 - 52 App. II Ethyl methanesulfonate semivolatile 62-50-0 8270C 20 -- 53 App. II Famphur semivolatile 52-85-7 8270C 20 -- 54 App. II Fluoranthene PAH 206-44-0 8270C 10 300 - 55 App. II Fluorene PAH 86-73-7 8270C 10 300 - NC SWSL NC 2L SWS-GWPS 56 App. II Hexachlorobenzene semivolatile 118-74-1 8270C 10 0.02 - 57 App. II Hexachlorocylopentadiene semivolatile 77-47-4 8270C 10 -50 58 App. II Hexachloroethane semivolatile 67-72-1 8270C 10 -2.5 59 App. II Hexachloropropene semivolatile 1888-71-7 8270C 10 -- 60 App. II Indeno[1,2,3-cd]pyrene PAH 193-39-5 8270C 10 0.05 - 61 App. II Isodrin semivolatile 465-73-6 8270C 20 -- 62 App. II Isophorone semivolatile 78-59-1 8270C 10 40 - 63 App. II Isosafrole semivolatile 120-58-1 8270C 10 -- 64 App. II Kepone pesticide 143-50-0 8270C 20 -- 65 App. II Methapyrilene semivolatile 91-80-5 8270C 100 -- 66 App. II 3-Methylcholanthrene semivolatile 56-49-5 8270C 10 -- 67 App. II Methyl methanesulfonate semivolatile 66-27-3 8270C 10 -- 68 App. II 2-Methylnaphthalene semivolatile 91-57-6 8270C 10 30 - 69 App. II Methyl parathion semivolatile 298-00-0 8270C 10 -- 70 App. II 1,4-Naphthoquinone semivolatile 130-15-4 8270C 10 -- 71 App. II 1-Naphthylamine semivolatile 134-32-7 8270C 10 -- 72 App. II 2-Naphthylamine semivolatile 91-59-8 8270C 10 -- 73 App. II o-Nitroaniline (2-Nitroaniline)semivolatile 88-74-4 8270C 50 -- 74 App. II m-Nitroaniline (3-Nitroaniline)semivolatile 99-09-2 8270C 50 -- 75 App. II p-Nitroaniline (4-Nitroaniline)semivolatile 100-01-6 8270C 20 -- 76 App. II Nitrobenzene semivolatile 98-95-3 8270C 10 -- 77 App. II 5-Nitro-o-toluidine semivolatile 99-55-8 8270C 10 -- 78 App. II o-Nitrophenol (2-Nitrophenol)semivolatile 88-75-5 8270C 10 -- 79 App. II p-Nitrophenol (4-Nitrophenol)semivolatile 100-02-7 8270C 50 -- 80 App. II N-Nitrosodiethylamine semivolatile 55-18-5 8270C 20 -- 81 App. II N-Nitrosodimethylamine semivolatile 62-75-9 8270C 10 0.0007 - 82 App. II N-Nitrosodi-n-butylamine semivolatile 924-16-3 8270C 10 -- 83 App. II N-Nitrosodiphenylamine semivolatile 86-30-6 8270C 10 -- 84 App. II N-Nitrosodipropylamine semivolatile 621-64-7 8270C 10 -- 85 App. II N-Nitrosomethylethylamine semivolatile 10595-95-6 8270C 10 -- 86 App. II N-Nitrosopiperidine semivolatile 100-75-4 8270C 20 -- 87 App. II N-Nitrosopyrrolidine semivolatile 930-55-2 8270C 10 -- 88 App. II Parathion OP pesticide 56-38-2 8270C 10 -- 89 App. II Pentachlorobenzene semivolatile 608-93-5 8270C 10 -- 90 App. II Pentachloronitrobenzene semivolatile 82-68-8 8270C 20 -- 91 App. II Phenacetin semivolatile 62-44-2 8270C 20 -- 92 App. II Phenanthrene PAH 85-01-8 8270C 10 200 - 93 App. II Phenol semivolatile 108-95-2 8270C 10 30 - 94 App. II p-Phenylenediamine semivolatile 106-50-3 8270C 10 -- 95 App. II Phorate OP pesticide 298-02-2 8270C 10 1 - 96 App. II Pronamide semivolatile 23950-58-5 8270C 10 -- 97 App. II Pyrene PAH 129-00-0 8270C 10 200 - 98 App. II Safrole semivolatile 94-59-7 8270C 10 -- 99 App. II 1,2,4,5-Tetrachlorobenzene semivolatile 95-94-3 8270C 10 -2 100 App. II 2,3,4,6-Tetrachlorophenol semivolatile 58-90-2 8270C 10 200 - 101 App. II o-Toluidine semivolatile 95-53-4 8270C 10 -- 102 App. II 2,4,5-Trichlorophenol semivolatile 95-95-4 8270C 10 -63 103 App. II 2,4,6-Trichlorophenol semivolatile 88-06-2 8270C 10 -4 104 App. II O,O,O-Triethyl phosphorothioate semivolatile 126-68-1 8270C 10 -- 105 App. II 1,3,5-Trinitrobenzene semivolatile 99-35-4 8270C 10 -- 106 App. II Hexachlorobutadiene semivolatile 87-68-3 8270C or 8260 10 0.4 0.44 107 App. II Ethyl methacrylate semivolatile 97-63-2 8270C or 8270 10 -- 108 App. II Naphthalene volatile 91-20-3 8260B or 8270 10 6 - 109 App. II Pentachlorophenol herbicide 87-86-5 8151 or 8270 25 0.3 - ANALYTICAL METHOD NC App. II - Method 8270 Number NC App. #ANALYTE CLASS CAS RN ANALYTE CLASS CAS RN NOTES NC App. II - Method 8270 ANALYTICAL METHOD NOTES Number NC App. #GROUNDWATER STANDARDS (µg/L) GROUNDWATER STANDARDS (µg/L) NCSWMR Appendix I + II Constituents with NC-2L Standards Joyce Engineering Page 3 of 3 Revised: May 2016 NC SWSL NC 2L SWS-GWPS 1 App. II Aldrin pesticide 309-00-2 8081A 0.05 -0.002 2 App. II alpha-BHC pesticide 319-84-6 8081A 0.05 -0.006 3 App. II beta-BHC pesticide 319-85-7 8081A 0.05 -0.019 4 App. II delta-BHC pesticide 319-86-8 8081A 0.05 -0.019 5 App. II gamma-BHC (Lindane)pesticide 58-89-9 8081A 0.05 0.03 - 6 App. II Chlordane pesticide see note 8081A 0.5 0.1 - This entry includes alpha-chlordane (CAS RN 5103-71-9), beta chlordane (CAS RN 5103-74-2), gamma-chlordane (CAS RN 566- 34-7), and constituents of chlordane (CAS RN 57-74-9 and 12672- 29 6)7 App. II 4,4'-DDD pesticide 72-54-8 8081A 0.1 0.1 - 8 App. II 4,4'-DDE pesticide 72-55-9 8081A 0.1 -- 9 App. II 4-4'-DDT pesticide 50-29-3 8081A 0.1 0.1 - 10 App. II Dieldrin pesticide 60-57-1 8081A 0.075 0.002 - 11 App. II Endosulfan I pesticide 959-96-8 8081A 0.1 40 - 12 App. II Endosulfan II pesticide 33213-65-9 8081A 0.1 42 - 13 App. II Endosulfan sulfate pesticide 1031-07-8 8081A 0.1 -40 14 App. II Endrin pesticide 72-20-8 8081A 0.1 2 - 15 App. II Endrin aldehyde pesticide 7421-93-4 8081A 0.1 2 - 16 App. II Heptachlor pesticide 76-44-8 8081A 0.05 0.008 - 17 App. II Heptachlor epoxide pesticide 1024-57-3 8081A 0.075 0.004 - 18 App. II Methoxychlor pesticide 72-43-5 8081A 1 40 - 19 App. II Toxaphene pesticide see note 8081A 1.5 0.03 -Includes congener chemicals contained in technical toxaphene (CAS RN 8001-35-2) such as chlorinated camphene. NC SWSL NC 2L SWS-GWPS 1-6 App. II Polychlorinated Biphenyls (PCBs) PCB 1336-36-3 8082 2 -0.09 This category contains congener chemicals, including constituents of Aroclor 1016 (CAS RN 12674-11-2), Aroclor 1221 (CAS RN 11104-28-2), Aroclor 1232 (CAS RN 11141-16-5), Aroclor 1242 (CAS RN 53469-21-9), Aroclor 1248 (CAS RN 12672-29-6), Aroclor 1254 (CAS RN 11097-69-1)). NC SWSL NC 2L SWS-GWPS 1 App. II 2,4-Dichlorophenoxyacetic acid (2,4-D)herbicide 94-75-7 8151A 2 70 - 2 App. II Dinoseb (DNBP); 2-sec-Butyl-4,6-dinitrophenol herbicide 86-85-7 8151A 1 -7 3 App. II Silvex (2,4,5-TP)herbicide 93-72-1 8151A 2 50 - 4 App. II 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T)herbicide 93-76-5 8151A 2 -- 5 App. II Pentachlorophenol herbicide 87-86-5 8151 or 8270 25 0.3 - Notes: Color denotes NC App. I Constituents.All concentrations in micrograms per liter (µg/L) = parts per bilion (ppb). Color denotes remaining NC App. II Constituents.NC-SWSL = NC-DENR Solid Wastre Section Reporting Limits NC 2L = NC Groundwater Protection Standards from 15A NCAC 2l.0202. Color denotes C&D Constituents.SWS-GWPS = Groundwater Protection Standards established by the NC-DENR Solid Waste Section for constituents with no NC 2L Standard. App. I & App. II = Solid Waste Constituent Lists incorporated into NC Solid Waste Management Rules from CFR-40 Appendix I and Appendix II. Color denotes constituents that can be analyzed by more than one method.C&D = Construction & Demolition Debris (referencing Landfills). CAS RN: Chemical Abstracts Service Registry Number. Where 'Total' is entered, all species that contain the element are included. Class: General type of compound. OP = orthophosphate. PAH = polynuclear aromatic hydrocarbon. Volatile EQL of 1 µg/L is based on a 25-mL purge per SW-846, Final Update III, Revision 2, December 1996, page 8260B-35 (most recent revision to method 8260 in SW-846). " - " = not available/not applicable Referenced from North Carolina Division of Waste Management website (http://www.wastenotnc.org/sw/swenvmonitoringlist.asp) as of 4/16/2015. ANALYTE CLASS CAS RN ANALYTICAL METHOD NOTES NOTES Number NC App. # NOTESNumberNC App. #ANALYTE CLASS CAS RN ANALYTICAL METHOD Number NC App. #ANALYTE CLASS ANALYTICAL METHODCAS RN GROUNDWATER STANDARDS (µg/L) GROUNDWATER STANDARDS (µg/L) NC App. II - Herbicides 8151 NC App. II - PCB's Method 8082 GROUNDWATER STANDARDS (µg/L) NC App. II - Pesticides Method 8081 Prepared For: COBLE’S SANDROCK, INC. 5833 FOSTER STORE ROAD LIBERTY, NORTH CAROLINA 27298 Submitted By: LaBella Associates 2211 West Meadowview Rd. Suite 101 Greensboro, NC 27407 336-323-0092 NC License No. C-0782 LANDFILL GAS MONITORING PLAN COBLE’S SANDROCK CONSTRUCTION & DEMOLITION DEBRIS LANDFILL PERMIT NO. 01 -05 VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 1 Table of Contents 1.0 INTRODUCTION ................................................................................................................................. 2 1.1 Regulatory Limits ......................................................................................................................... 2 1.2 Gas Control Plan and Landfill Gas Monitoring Network ............................................................ 2 1.3 Structure and Ambient Sampling ................................................................................................ 3 2.0 Landfill Gas Sampling Procedures .................................................................................................. 4 2.1 Gas Detection Probes .................................................................................................................. 4 2.2 Detection Equipment ................................................................................................................... 4 2.3 Response to Detected Combustible Gases ................................................................................ 4 2.4 Landfill Gas Sampling Protocol ................................................................................................... 5 2.5 Sampling and Analysis Procedure ............................................................................................... 6 2.6 LFG Monitoring Frequency .......................................................................................................... 7 2.7 Safety Precautions ....................................................................................................................... 7 3.0 Record Keeping and Reporting ....................................................................................................... 8 3.1 Landfill Gas Monitoring Data Form ............................................................................................. 8 3.2 Sampling Reports ......................................................................................................................... 8 3.3 Permanent Record Keeping ........................................................................................................ 8 4.0 CONTINGENCY PLAN ........................................................................................................................ 8 5.0 Certification of North Carolina Professional Geologist or Engineer ........................................... 10 6.0 CERTIFICATION OF REGISTERED LAND SURVEYOR .................................................................... 10 7.0 REFERENCES ................................................................................................................................. 10 Drawing Drawing 1 - Landfill Gas Monitoring Plan Appendices Appendix A - Solid Waste Section – Landfill Gas Monitoring Guidance Appendix B - Landfill Gas Monitoring Data Form Appendix C - SWS November 2014 Memo on Document Submittal Appendix D - Certification of Professional Geologist or Engineer VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 2 1.0 INTRODUCTION The North Carolina Department of Environment Quality will be referenced as NCDEQ in this document, including references to its actions or documents predating the change. The NCDEQ Division of Waste Management (DWM) and Solid Waste Section (SWS) retain the same designations. This Landfill Gas Monitoring Plan (LGMP) will serve as a guidance document for collecting and monitoring of landfill gas at Coble’s Sandrock Construction and Demolition Landfill (C&DLF). Landfill gas will be monitored quarterly to ensure that methane and hydrogen sulfide concentrations do not exceed the regulatory limit at the facility boundary or in facility structures. The LGMP was prepared in accordance with the NCDEQ-DWM-SWS Gas Monitoring Guidance document, including updated monitoring requirements for C&D landfills, to assure performance standards are met and to protect public health and the environment. 1.1 Regulatory Limits The unlined C&D landfill at the Coble’s Sandrock is governed by the North Carolina Solid Waste Management Regulations (NCSWMR) 15A NCAC 13B.0500 rules. Current regulations and requirements for C&D landfills state that concentration of methane gas, as well as hydrogen sulfide (H2S), generated by the facility should not exceed 25% of the lower explosive limit (LEL) in facility structures or that the concentrations of gasses do not exceed the LEL at the facility property boundary. The LEL for methane equals 5% by volume at standard temperature and pressure. The LEL for hydrogen sulfide equals 4% by volume at standard temperature and pressure. This LGMP prescribes a routine monitoring program to ensure standards are met and the actions to be taken if methane or hydrogen sulfide concentrations exceed specified limits. 1.2 Gas Control Plan and Landfill Gas Monitoring Network To protect public health and safety in the vicinity of the landfill, gas produced by the decomposition of refuse will be controlled and monitored during the operational, closure, and post- closure periods. The gas monitoring program will be implemented for the purpose of maintaining the concentration of methane gas below the regulatory levels. The landfill gas monitoring plan is currently proposed to include monitoring, and passive gas venting in the landfill. Other remedial measures will be implemented as needed to mitigate a potential gas migration problem. Gas monitoring at the Coble’s Sandrock C&D Landfill will be performed during the active life of the landfill and throughout the post-closure care period. Quarterly monitoring will be conducted at all subsurface gas detection probes. The approximate location of the landfill gas probes are shown in Drawing 1. A typical probe construction detail is presented on page 13 in Section 5 of Appendix A. VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 3 The landfill gas monitoring network consist of four gas probe named GP-01 through GP-04. The probe locations were chosen to adequately surround areas where waste will be in place and where potential receptors are nearby. GP-01 monitors potential gas migration from Phase 3B, or to the structure on the property adjacent and to the west of Phase 3B. GP-02 monitors gas potential migration off the landfill property to the west of Phase 2B, GP-03 monitors potential gas migration off the landfill property to the northeast of Phase 3A, and GP-04 monitors potential gas migration off the landfill property to the southeast of Phase 3A. Monitoring probes are not proposed directly to the north of the landfill since the property line in this direction is a perennial stream, Poppaw Creek, which will serve as a barrier for subsurface methane migration. Additional gas detection probes will be installed on the site as additional phases are permitted for operation. Proposed probe locations will be field engineered after the site is graded so that optimum locations can be selected. Sufficient numbers of gas probes will be installed to adequately monitor each phase. Construction records for the gas probes will be submitted to the Division upon completion. Gas probes will be constructed of nominal 2-inch PVC riser and screen. The screened interval shall begin at the 5 feet below ground surface and extend to the total depth of the boring. The probes will be completed with concrete well pads and lockable protective covers. If auger refusal is encountered at less than 10 feet below ground surface, the drilling rig will be offset approximately 10 to 30 feet to make another attempt. If after 3 attempts, no boring has exceeded 10 feet, but at least one exceeded 5 feet in depth, the probe will be installed in the deepest boring, with construction adjusted for the shallow depth. If none of the 3 attempts exceed 5 feet in depth, no probe will be installed at that location. Within thirty (30) days of completion of any landfill monitoring gas wells, a well construction record and/or boring log for each well, including but not limited to total depth, screened interval and distance above the seasonal water table, will be submitted to the SWS. The submittal will also include a scaled topographic map showing the location and identification of new, existing and abandoned landfill gas monitoring wells. Upon final closure, passive landfill gas vents will be installed along with the final cover system to allow release of gas to the atmosphere. These vents will be installed at a frequency of approximately one per acre of cap surface area. 1.3 Structure and Ambient Sampling In accordance with Solid Waste Section’s (SWS) Landfill Gas Monitoring Guidance document and Rules 15A NCAC 13B.0600, the active facility structures within 1000 feet of waste will be monitored for methane. All accessible areas of the interiors, especially areas such as plumbing that could be entry points for gas, will be monitored. VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 4 2.0 LANDFILL GAS SAMPLING PROCEDURES Landfill gas samples will be collected in accordance with Solid Waste Section’s Landfill Gas Monitoring Guidance document included as Appendix A. Details of detection equipment and sampling procedures are outlined below. 2.1 Gas Detection Probes Gas monitoring in detection probes will consist of attaching the monitoring device to each tubing within the probes, and recording both the initial concentration and steady state concentration of combustible gases. SWANA guidelines for purging wells and other monitoring procedures shall be followed. 2.2 Detection Equipment A portable combustible gas monitor, measuring the concentration of combustible gases in units of percent of LEL and/or % by volume shall be used to conduct gas monitoring. The LEL is the lowest percent by volume of a mixture of combustible gas in air that will propagate a flame at 25 degrees Celsius and atmospheric pressure. The preferred equipment will be a portable gas monitor that can reliably measure methane and hydrogen sulfide in both Percent Volume and Percent LEL, such as the Landtec/QED Gas Analyzer and Gas Extraction Monitor (GA/GEM) series of instruments. The gas monitoring instrument shall be calibrated to methane according to the manufacturer's calibration procedure before the monitoring activities begin. The calibration gas to be used depends on the expected levels of methane in landfill gas monitoring wells. The appropriate manufacturer’s specified calibration gas concentration shall be used based on the appropriate monitoring range expected, or beginning with the lower methane concentration range. Verification that the equipment was calibrated in accordance with the manufacture’s specifications is required. Calibration information must be recorded on the Landfill Gas Monitoring Data Form. The H2S monitor or pod shall be calibrated to H2S using the manufacturer's calibration kit and procedure before the monitoring activities begin. Most instruments monitor for, and are calibrated in, the 0-500 ppm range for H2S for purposes of human health and safety. This range is more protective than the explosive limit monitoring requirement, and should provide warning of H2S migration long before exceedance of the LEL. 2.3 Response to Detected Combustible Gases The regulatory action levels for combustible gas monitoring in gas detection probes are 100% LEL at the facility boundary and 25% LEL in on-site structures. Following a non- compliant reading, Coble’s Sandrock, Inc. will notify the North Carolina Department of VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 5 Environmental Quality, Solid Waste Section in writing and will take immediate steps to ensure safety and protection of human health. At a minimum, the following actions will be taken if the methane concentration exceeds 25% of the LEL in any structure: • Put out all smoking materials and turn off all ignition sources; • Evacuate all personnel; • Vent the structure; • Do not allow personnel to reenter the building, except to perform gas monitoring, until the results of additional monitoring indicate that methane concentrations are sustained or stabilized below 25% LEL; • Begin continuous monitoring within the structure; and • Undertake an assessment to determine the origin and pathways of the gas migration. Within seven days of detection, the monitoring results, actions taken and actions proposed to resolve the problem will be placed in the Operating Record. Within 60 days of detection, Coble’s Sandrock, Inc. will develop and implement a landfill gas remediation plan for the combustible gas releases and notify the Division that the plan has been implemented. The plan will describe the nature and extent of the problem and the proposed remedy. 2.4 Landfill Gas Sampling Protocol The portable combustible gas monitor will be turned on and allowed to warm up prior to gas sampling. The static pressure should show a reading of zero before taking the initial sample. The sample tube shall be purged for at least one minute prior to connecting the sample tube to the detection well, and then the initial concentration will be recorded. Gas monitoring will continue until the readings have stabilized. A stable reading is considered to be +/- 0.5% by volume on the instrument’s scale. Once the reading has stabilized for 5 seconds, the reading will be recorded and the tubing will be disconnected from the valve. These steps will be repeated for each landfill gas monitoring well. While sampling, results for methane should be determined in Percentage of the LEL as well as Percent Volume. Some instruments such as the Landtec GEM series track both measurements, if the instrument does not, both the LEL and Percent Volume of each monitored point need to be calculated for proper reporting. 100 percent of the LEL for methane is equivalent to 5 Percent Volume in air; therefore; Percent Volume can be converted into percent of the LEL by multiplying by a factor of 20: Methane in % Volume X 20 = % LEL, and VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 6 Percent LEL can be converted to Percent Volume with: %LEL/20 = % Volume Methane The results should be recorded for proper reporting as described in the following sections. Gas monitoring in on-site structures will attempt to identify the "worst case" concentrations. The monitoring locations will be in corners along floors and ceilings, at cracks in the floor, and at other areas likely to accumulate gas. Gas monitoring will also be conducted in any confined space requiring the entry of personnel for maintenance or inspection. The monitoring will take place prior to entry by personnel in accordance with OSHA regulations. 2.5 Sampling and Analysis Procedure The required monitoring will be completed by a properly trained professional. The portable equipment to be used will be designed for the detection of combustible gases or vapors. The standard operating procedure for this type of monitoring is as follows: • Calibrate the monitoring equipment in accordance with the manufacturer’s instructions. • Measure and record the undisturbed probe pressure/vacuum. This requires connecting the pressure gauge to a device such as quick connect, or a valve, and then opening the valve to measure the pressure. • Leak check the entire sample train by sealing the end of the monitoring hose and verifying that air does not leak into the sample train either through stoppage of the pump or maintaining a complete seal. • Purge the probe casing (piping). Based on probe casing volume and sample pump flow rate, determine the purge time to pump over two volumes from the casing using the sample pump. The objective is to monitor soil gas from void spaces surrounding the probe screened interval. • Read and record the stabilized concentration of methane. • If the methane reading continually increases as the probe is pumped, the initial concentration after purging is recorded because the objective is to record the conditions of the gas around the probe rather than gases that can be pulled to the probe via the pumping process. • Keep monitoring results in the landfill operating record. The personnel performing the LFG potential migration monitoring and data evaluation will be knowledgeable of the factors that may influence migration. This will ensure that the monitoring effort will be thorough and that potential problems can quickly be identified and VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 7 corrected. The following are several factors that monitoring personnel will remain aware of and/or make visual observations of: • Distressed vegetation, signs of stunted growth, wilting, color changes, death during the growing season, and bare spots; • Increased “rotten egg” odors around the landfill, indicating the presence of hydrogen sulfide, a common trace constituent found in landfill gas; and • Air bubbles permeating through standing water outside the limits of waste that may be from gas laterally migrating and finding its way to the surface. • Development of surrounding areas, such as placing impermeable ground covers (i.e., paved parking areas, building slabs), can force landfill gas to remain underground and promote lateral migration. Additionally, off-site structures and utilities can provide enclosed areas in which landfill gas may collect and pose a safety hazard; • Heavy irrigation or rainfall that saturates the soil may provide an impermeable barrier to landfill gas causing lateral migration; • Excavation activities such as utility trenches may cause landfill gas to escape through the soils and into the excavation. The landfill gas may accumulate to explosive levels or displace oxygen within the excavation. Both possibilities compromise safety; • Surface cracks or settlement can cause uncontrolled venting of landfill gas or air intrusion into the landfill that could reduce landfill gas quality (decrease methane concentration) or increase the potential for a landfill fire; • Barometric pressure, wind, and temperature can affect the net pressure of landfill gas present. At a lower barometric pressure, more landfill gas tends to escape through the cover or the surrounding surface; and • Snow or frozen ground cover, as with saturated soil, can reduce surface permeability and increase lateral migration of landfill gas. 2.6 LFG Monitoring Frequency The landfill gas wells and on-site structures included in this LGMP will be monitored at least quarterly in accordance with current regulations. The gas wells will be monitored for the second and fourth quarterly events in conjunction with the semiannual groundwater monitoring events which usually occur in April-June and October-December. 2.7 Safety Precautions During landfill gas monitoring events, special attention will be placed on areas and probes with methane concentrations approaching or exceeding the regulatory limits. Excessive concentrations of combustible gases in structures (i.e., 25% LEL or greater) shall be cause VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 8 for immediate evacuation of any structure that is staffed. Entry into the building should be prohibited until the concentrations are maintained at satisfactory levels. The source of the gas, or gas migration pathway, shall be investigated to determine appropriate courses of action to prevent the reoccurrence of the event. As a general rule, maintaining a good air flow in the space and good ventilation will help prevent potential gas build-up situations. In addition, methane concentrations in areas that are usually closed off, such as closets and equipment service areas, can be managed with a louvered door and through-the-wall vents. 3.0 RECORD KEEPING AND REPORTING The landfill gas data will be recorded in accordance to the SWS’s Landfill Gas Monitoring Guidance document included as Appendix A . The records will be maintained in the landfill operating record. If there are exceedances of regulatory limits, the NCDEQ will be notified within seven calendar days of the detection. 3.1 Landfill Gas Monitoring Data Form An example landfill gas monitoring form is included as Appendix B. 3.2 Sampling Reports The landfill gas monitoring reports will be prepared in accordance with the NCDEQ-DWM- SWS Gas Monitoring Guidance (Appendix A), and current requirements for C&D landfills. Electronic submittals of reports, when required, will be in accordance with the SWS Memo, dated November 4, 2014, included as Appendix C. The reports will describe the method of sampling, the date, time, location, sampling personnel, atmospheric temperature, reported barometric pressure, equipment calibration information, exceptions noted during sampling, and general weather conditions at the time of sampling, in addition to the concentration of combustible gases in percent volume and percent of the LEL. 3.3 Permanent Record Keeping A copy of the landfill gas monitoring results and any remediation plans will be maintained in the landfill operating record. The reports will be maintained at the facility or an alternative location near the facility approved by the Division. 4.0 CONTINGENCY PLAN If methane gas or hydrogen sulfide gas levels that exceed the regulatory limits are detected, the results shall be reported to Burke County immediately. The County will notify the NCDEQ, SWS in writing and will take immediate steps to ensure safety and protection of human health. VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 9 If methane or hydrogen sulfide levels exceed the LEL in existing gas probes, the need for additional gas probes will be evaluated, as well as the need for additional monitoring within any nearby structures in the direction of the gas migration. If the exceedance is in a gas well not located at or near a property boundary, additional investigation including use of bar-hole probes or temporary gas wells may be implemented to determine whether or not the exceedance extends to the property boundary. If necessary, additional permanent gas wells may be installed between the exceeding well(s) and the property boundary to demonstrate that the site is in compliance. If a compliance level is exceeded in an on-site structure, options will be evaluated to reduce the current methane or hydrogen sulfide levels and to prevent further migration of gasses into the structure. At a minimum, the following actions will be taken if the methane or hydrogen sulfide concentrations exceed 25% of the LEL in any structure: • Put out all smoking materials and turn off all ignition sources; • Evacuate all personnel; • Vent the structure; • Do not allow personnel to reenter the building except to perform gas monitoring until the results of additional monitoring indicate that gas concentrations are sustained or stabilized below 25% of the LEL; • Begin continuous monitoring within the structure; and • Undertake an assessment to determine the origin and pathways of the gas migration. Within seven days of detection above the regulatory limits, the monitoring results will be placed in the Operating Record and the County will indicate actions taken and actions proposed to resolve the problem. Within 60 days of detection, the County will develop and implement a landfill gas remediation plan for the combustible gas releases and notify the Division that the plan has been implemented. The plan will describe the nature and extent of the problem and the proposed remedy. Hydrogen sulfide becomes dangerous to human health at concentrations well below the Lower Explosive Limit. The OSHA Personal Exposure Limit (PEL) for H2S is 10 ppm for 8- hours or 50 ppm peak exposure, and the NIOSH Immediately Dangerous to Life and Human Health (IDLH) limit for H2S is 100 ppm. North Carolina Solid Waste Management Regulations only require monitoring for explosive gas levels, not hazardous levels; however, we recommend voluntary monitoring for H2S in the potentially hazardous range. If H2S is detected at concentrations above 10 ppm in any gas probe or outdoor ambient air monitoring point, or above 2.5 ppm inside any structure, we recommend that the County be notified immediately and appropriate action will be taken to protect human health, similar to the actions described above. VII – Landfill Gas Monitoring Plan LaBella Associates, PC C&D LF 5-Year Permit Renewal/LOS May 2019 Coble’s Sandrock, North Carolina 10 5.0 CERTIFICATION OF NORTH CAROLINA PROFESSIONAL GEOLOGIST OR ENGINEER The landfill gas monitoring plan for this facility has been prepared by a qualified geologist or engineer who is licensed to practice in the State of North Carolina. The Certification of Professional Geologist or Engineer form is included as Appendix D. 6.0 CERTIFICATION OF REGISTERED LAND SURVEYOR All future landfill gas monitoring wells will be surveyed for location and elevation by a North Carolina Registered Land Surveyor. 7.0 REFERENCES Brown, Philip M., Chief Geologist, 1985, Geologic Map of North Carolina, The North Carolina Geologic Survey, scale 1:500,000. Fetter, C.W., 2001, Applied Hydrogeology, Fourth Edition: Prentice-Hall, Inc. Johnson, A.I., 1967, Specific Yield - Compilation of Specific Yields for Various Materials: U.S. Geological Survey Water Supply Paper 1662-D. North Carolina Department of Environment and Natural Resources, 1990-2011, Solid Waste Management Regulations. United States Department of Labor, Occupational Health and Safety Commission, Standards 29 CFR Part 1926, 1970, Occupational Health and Environmental Controls, 29 CFR 1926.55 Appendix A - 1970 American Conference of Governmental Industrial Hygienists' Threshold Limit Values of Airborne Contaminants, Threshold Limit Values of Airborne Contaminants for Construction, Hydrogen Sulfide. DRAWINGS 57057 0 580 590 60 0 5 8 0 580 5805706306206106306206006106206206306406506406 5 0 6 6 0 60061062063065 0 6 4 0610620630 640640630650640630620640630640 650640 650640640 640 5705705 8 0 5 9 0 600610620630640650590600610620630640610640570570 580630 6506406306406 5 0 610590600802326.19 1842194.44 567.53CBL-1 801804.71 1844578.84 644.64 CBL-2 799921.70 1842927.64 647.78CBL-3 799303.411844867.07 643.82 CBL-4 800512.15 1843829.01 664.59 CBL-5 799258.31 1842351.29 623.10 CSR23 798539.441844950.35 651.21 CSR24 803810.51 1841879.30 648.34 GPS-1 GP-1 GP-2 GP-3 GP-4 PHASE 1APHASE 2B PHASE 2A PRIVATE DWELLING PRIVATE DWELLING PROPERTY LINE WASTE LIMITS PERMITTED FACILITY BOUNDARY LEGEND EXISTING 2 FOOT CONTOURS EXISTING 10 FOOT CONTOURS PROPERTY LINE FACILITY LINE CELL LIMITS STREAM ROAD GAS PROBE GP- 1PROPOSED PHASE 3A PROPOSED PHASE 3B PROJECT NO.APPROVEDCHECKEDDRAWNDESIGNEDDATEDATEREVISIONS AND RECORD OF ISSUEBYNOAPPCKSCALE All rights reserved.Ó Joyce Engineering, Inc.DRAWING NO.L:\Coble Sandrock\2019 LFG PLAN.dwg Layout=Layout10 (FEET) GRAPHIC SCALE 400200100 2180191COBLES SANDROCK INC.KIMESVILLE, NORTH CAROLINA20191 AS NOTEDLANDFILL GAS PLANHKRWHHKHK03/01/19NC CORP LIC: C-07829731-F SOUTHERN PINE BLVDCHARLOTTE, NC 28273PHONE: (704) 817-2037 APPENDICES APPENDIX A Solid Waste Section – Landfill Gas Monitoring Guidance                                                           APPENDIX B Landfill Gas Monitoring Data Form NC Division of Waste Management - Solid Waste Section Landfill Gas Monitoring Data Form Notice: Facility Name: ________________________________________________________ Permit Number: _______________________________________ Sampling Date: _____________________________________________ NC Landfill Rule (.0500 or .1600): _________________________________ Sample Collector Name & Position: _________________________________________________________________________ Gas Meter Type & Serial Number: _____________________________ Gas Meter Calibration Date: Field Calibration Date & Time: ___________________________________________________________________________ Field Calibration Gas Type (15/15 or 35/50): _________________ Field Calibration Gas Canister Expiration Date: Gas Meter Pump Rate: _____________________________________ Ambient Air Temperature: __________ Barometric Pressure (in. or mm Hg): Weather Conditions: Instructions: Location or LFG Well ID Sample Tube Purge Time of Day Time Pumped (sec) Initial % LEL Stabilized % LEL % CH4 (volume) % O2 (volume) % CO2 (volume) % H2S* (volume) NOTE: If needed, attach additional data forms to include additional LFG monitoring data locations for the facility. ACTION LEVELS: Methane: >1.25% by volume (inside structures) AND >5% by volume (at facility boundary) Hydrogen Sulfide: >1% by volume (inside structures) AND >4% by volume (at facility boundary) Certification SIGNATURE TITLE Revised – March 6, 2017 To the best of my knowledge, the information reported and statements made on this data submittal and attachments are true and correct. I am aware that there are significant penalties for making any false statement, representation, or certification including the possibility of a fine and imprisonment. NOTES Under “Location or LFG Well”, list monitoring well # or describe monitoring location (e.g., inside field office).Attach a test location map or drawing. Report methane readings as both % LEL and % CH4 by volume. Convert % CH4 (by volume) to % LEL as follows: % methane (by volume)/20 = % LEL. *Hydrogen Sulfide (H2S) gas monitoring may be required for Construction & Demolition Landfills (CDLFs). See individual permit conditions and/or Facility LFG monitoring plan. This form and any information attached to it are "Public Records" as defined in NC General Statute 132-1. As such, these documents are available for inspection and examination by any person upon request (NC General Statute 132-6). Landfill Gas Monitoring Data Form Facility Name: ____________________ Permit Number: ___________________ Date of Sampling: ____________________ Personnel: ___________________ Gas Monitor Type & Serial No: ____________________ Calibration Date: ___________________ Field Calibration Date & Time: ____________________ Calibration Gas Type: ___________________ General Weather Conditions: ____________________ Barometer : ___________________ Location or LFG GW ID Instr. purged Time Well Pressure (InWg) Time Pumped (sec.) CH4 (%LEL) CH4 (%Vol) H2S (ppm) Notes Abbreviations: GW = Gas Well LEL = Lower Explosive LimitLimits: CH4 LEL = 5% Volume H2S LEL =4% Vol H2S IDLH = 100 ppm APPENDIX C SWS November 2014 Memo on Document Submittal North Carolina Department of Environment and Natural Resources Division of Waste Management Pat McCrory John E. Skvarla, III Governor Secretary 1646 Mail Service Center, Raleigh, North Carolina 27699-1646 2090 US Highway 70, Swannanoa, North Carolina 28778-82111 Phone: 919-707-8200 Phone: 828-296-4500 http://portal.ncdenr.org/web/wm/ An Equal Opportunity / Affirmative Action Employer 1 November 5, 2014 MEMORANDUM To: Solid Waste Directors, Public Works Directors, Landfill Operators, and Landfill Owners From: Solid Waste Section Re: Groundwater, Surface Water, Soil, Sediment, and Landfill Gas Electronic Document Submittal The Solid Waste Section is continuing its efforts to improve efficiencies in document management. All groundwater, surface water, soil, sediment, and landfill gas documents submitted to the Solid Waste Section are stored electronically and are made readily available for the public to view on our webpage. Please remember that hard copies/paper copies are not required, and should not be submitted. The submittal of these electronic documents following a consistent electronic document protocol will also assist us in our review. Please follow these procedures when submitting all groundwater, surface water, soil, sediment, and landfill gas documents to the Solid Waste Section. Submittal Method and Formatting x All files must be in portable document format (pdf) except for Electronic Data Deliverables (EDDs) unless otherwise specified by the Solid Waste Section. All pdf files should meet these requirements: o Optical Characteristic Recognition (OCR) applied; o Minimum of 300 dpi; o Free of password protections and/or encryptions (applies to EDDs as well); o Optimized to reduce file size; and o Please begin using the following naming convention when submitting all electronic files: Permit Number (00-00)_Date of Document (YYYYMMDD). For example: 00-00_20140101. x Please submit all files via email or by file transfer protocol (FTP) via email to the appropriate Hydrogeologist unless otherwise specified by the Solid Waste Section. If the electronic file is greater than 20 MB, please submit the file via FTP or on a CD. If submitting a CD, please mail the CD to the appropriate Hydrogeologist. The CD should be labeled with the facility name, permit number, county, name of document, date of monitoring event (if applicable), and the date of document. x Please be sure a signed Environmental Monitoring Data Form is submitted as part of the electronic file for all water quality and landfill gas documents (monitoring, alternate source demonstration, assessment, investigation, corrective action). This completed form should be the first page of the document before the cover/title page and should not be submitted as an individual file. Blank forms can be downloaded at http://www.wastenotnc.org/swhome/EnvMonitoring/NCEnvMonRptForm.pdf Monitoring Data Monitoring data documents may include any or all of the following: 1) groundwater and surface water monitoring; 2) soil and sediment, and 3) landfill gas monitoring. In addition to the above procedures, at a minimum, please include the following: Groundwater and Surface Water Monitoring x A copy of the laboratory report(s). x A copy of the sampling log(s). x A separate table of detections and exceedances for each monitoring location. 1646 Mail Service Center, Raleigh, North Carolina 27699-1646 2090 US Highway 70, Swannanoa, North Carolina 28778-82111 Phone: 919-707-8200 Phone: 828-296-4500 http://portal.ncdenr.org/web/wm/ An Equal Opportunity / Affirmative Action Employer 2 o All analytical results should be reported in micrograms per liter (ug/L) except for field parameters and specific Monitored Natural Attenuation (MNA) parameters. o Please also include the laboratory’s method detection limit (MDL) in ug/L, the Solid Waste Section Limit (SWSL) in ug/L, the appropriate NC regulatory standard in ug/L (2L, 2B, GWPS, IMAC), and the Federal Maximum Contaminant Level (MCL) in ug/L. o Please BOLD each exceedance result. x A separate table of field parameters for each monitoring location. x An Electronic Data Deliverable (EDD) spreadsheet for each monitoring event submitted in the correct format. All analytical results should be reported in micrograms per liter (ug/L) except for field parameters and specific Monitored Natural Attenuation (MNA) parameters. The blank EDD template can be downloaded at http://www.wastenotnc.org/swhome/enviro_monitoring.asp. Please pay attention to the formats within the spreadsheet. Any EDD received that is not formatted correctly will be emailed back to be resubmitted via email within five (5) days. x A separate groundwater monitoring well construction table. o Please also include the date the well was drilled, well diameter, total well depth, depth to top of screened interval (in feet), screened interval (in feet), geology of screened interval, TOC elevation, ground elevation, groundwater elevation, GPS coordinates (latitude and longitude), and depth to water (in feet). x A separate groundwater table with groundwater flow rate(s). x A recent facility figure that includes labeled groundwater and surface water monitoring locations. x A groundwater flow map with an arrow(s) indicating flow direction(s), including date the measurements were taken. Soil and Sediment Sampling x A copy of the laboratory report(s). x A copy of the sampling log(s). x A separate table of detections and exceedances for each sampling location. o Please also include the results in micrograms per liter (ug/L), the laboratory’s method detection limit (MDL) in ug/L, and the appropriate NC regulatory standard (PSRG) in ug/L. o Please BOLD each exceedance result. x A separate table of soil and/or sediment characteristics. x A recent facility figure that includes labeled sampling locations. Landfill Gas Monitoring x A blank Landfill Gas Monitoring Data Form can be found within the Landfill Gas Monitoring Guidance document and can be downloaded at http://portal.ncdenr.org/c/document_library/get_file?uuid=da699f7e-8c13-4249-9012-16af8aefdc7b&groupId=38361. x A separate table of landfill gas detections and exceedances for each monitoring location. Please BOLD each exceedance result. x A recent facility figure that includes labeled landfill gas monitoring locations (both permanent and temporary). If you have any questions or concerns regarding electronic submittals, please feel free to contact the Hydrogeologist overseeing your facility. The Solid Waste Section greatly appreciates your assistance on this matter. Working together, we can continue to provide excellent customer service to you and to the public. x Jackie Drummond, Asheville Regional Office, 828-296-4706, jaclynne.drummond@ncdenr.gov x Ervin Lane, Raleigh Central Office, 919-707-8288, ervin.lane@ncdenr.gov x Elizabeth Werner, Raleigh Central Office, 919-707-8253, elizabeth.werner@ncdenr.gov x Christine Ritter, Raleigh Central Office, 919-707-8254, christine.ritter@ncdenr.gov x Perry Sugg, Raleigh Central Office, 919-707-8258, perry.sugg@ncdenr.gov APPENDIX D Certification of Professional Geologist or Engineer LANDFILL GAS MONITORING PLAN Coble Sandrock C&D Landfill Alamance County, NC Permit No. 01-05 Certification of Professional Geologist or Engineer The landfill gas monitoring plan for this facility has been prepared by a qualified geologist or engineer who is licensed to practice in the State of North Carolina. The plan has been prepared based on first-hand knowledge of site conditions and familiarity with North Carolina solid waste rules and industry standard protocol. This certification is made in accordance with North Carolina Solid Waste Regulations, indicating this Landfill Gas Monitoring Plan should provide early detection of landfill gas migration, so as to be protective of public health and the environment. No other warranties, expressed or implied, are made. Signed: Printed: Dated: Professional Seal