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HomeMy WebLinkAbout0403_AnsonLF_Mod_20240118Weaver Consultants � Group Donna Wilson, P.E. Division of Waste Management North Carolina Department of Environmental Quality 1646 Mail Service Center Raleigh, North Carolina 27699 January 18, 2024 Project No. 0601-369-11-04 Re: Phase 4 Cell 2 East Minor Modification Anson County Landfill, Anson County, North Carolina Permit Number 04-03 Dear Ms. Wilson: Weaver Consultants Group, LLC on behalf of Chambers Development of North Carolina, Inc. is submitting this minor modification application for Phase 4 Cell 2 East leachate collection system. The following section describes how leachate will be collected/managed in the Phase 4 Cell 2 East area. 1). Phase 4 Cell 2 East leachate will flow to the temporary extraction point located at the southern end of the cell. (See Drawing 2) 2). A pump will be inserted into the interim riser to pump leachate from the temporary extraction point. The 4-inch temporary forcemain will be connected into the side of the interim riser with a tee. (See Drawing 4, Detail L7) 3). A generator will be used to power the pump. It is anticipated that the pump will be turned on/off manually. 4). Leachate will be pumped from the extraction point through the 4-inch temporary forcemain to the 2023 previously installed forcemain and ultimately conveyed to the existing leachate storage area located in the southern side of the Phase 1 area. (See Drawing 213) The leachate collection system is detailed in the drawings included in Attachment 1. During the course of your review, if you have any questions or require further information, please call. Sincerely, Weaver Consultants Group, LLC Jonathan V. Queen, P.E. Project Director 6420 Southwest Blvd • Suite 206 • Fort Worth, Texas 76109 • 817.735.9770 • wcgrp.com • Offices Nationwide Donna Wilson, P.E. January 18, 2024 Attachments: Attachment 1: Phase 4 Cell 2 East Minor Modificaton Drawings cc: Brady Stewart, Chambers Development of North Carolina, Inc. Tyler Fitzgerald, Chambers Development of North Carolina, Inc. Matt Crockett, Chambers Development of North Carolina, Inc. Q: WASTE CONNECTIONSIANSON COHNTYIPHASE 4 CELL 2 � PHASE 4 CELL 2 EASTI PHASE 4 CELL 2 MINOR MOD.DOC 2 Weaver Consultants Group ATTACHMENT 1 PHASE 4 CELL 2 EAST MINOR MODIFICATION DRAWINGS 0 BASIN T13 (SEE NOTE 4) �B_13 SEE NOTE 6 11 -10 ` 36" CMP CULVERT �� >♦ � � r 300 \1 NIIII N 460000 / NOTE 5) (SEE -9 3e( Ln .:.. .................................. 290 ................. d::::(:::::::(::::::::::::(:::::::(:::::::::: ......................... sfr. ::::::::::: ....... .... ::� �r::�:�:R9r::�f::::::.{:::r .................. ...... .. .... 3:. .......... . /::.:..:.::.:..:.::.:.::.::....:.::.:....::::..:..:.:.. 312 :C.:.:..:.:.:...:.:..:.:.:...:.:..:.:.::..:.:..:.:.:...::.......:.:. .... ..................................... .. ...:....:...0 :::. ....... ............... _ ... . 1 00 1 1................ 3 ...............:... vs:..:.:.:..:.::.:...:.:... :.: ` I......::; rrrrrrrrrrrrr.....::.:....... _...........:..:..:':: 2023 CONSTRUCTION BORROW AREA I `:..:....:.-.:..:.-.:..:-.:....-. g16 / (SEE NOTE 4) 3:1.-=-06 i:.:.- ......:.:....:.......:: i:.:.3:1.::::::.: r 31 ` ...... ....................... / (SEE NOTES 5 AND 6) .......... ` INTERCELL TIE-IN N 459521.55 E 1650923.71 1� i O D v EXISTING TO BE AVOIDED INTERCELL TIE-IN I V I N 459989.89 I I E 1651197.34 3:1 I � II I I � I vp'RIES M � I LQ N UQ �I 00 N r7 M M U M 3:1 INTERCELL TIE-IN N 459598.80 E 1651167.28 u? I ! 330 - 330------ - I \ I \ EXISTING PHASE 4 n CELL 1 IJ I I I X\\1114111 iU i i o i S f0 --, r = SEALS I O51678 01 /18/2024 PHASE i I 0 50 100 SCALE IN FEET LEGEND - — — — — - LIMITS OF WASTE PHASE BOUNDARY - CELL BOUNDARY 350 EXISTING CONTOUR N 460000 STATE PLANE GRID 320.5 PHASE 4 CELL 2 EAST CONSTRUCTED SUBGRADE CONTOUR 314 PHASE 4 CELL 2 WEST SUBGRADE CONTOUR - -4- — — f - LEACHATE LINE 7Z/-JJ�7 TIE-IN ZONE t 77717-7 f INTERCELL TIE-IN ZONE 2023 PREVIOUSLY INSTALLED FORCEMAIN 0 B-9 DIGITIZED PIEZOMEfER OR WELL DESIGNED TOP OF CLAY LINER CONTOUR (SEE NOTE 2) \ FUTURE PHASE 4 CELL 2 WEST 1 REDEVELOPMENT AREA NOTES: 1. EXISTING CONTOURS AND ELEVATIONS PROVIDED BY FIRMATEK, LLC. COMPILED FROM AERIAL PHOTOGRAPHY FLOWN 02-20-2023. 2. PHASE 1 AND 2 DESIGN TOP OF CLAY LINER CONTOURS OBTAINED FROM FIGURE 1-PERMIT AIRSPACE LINER GRADES PREPARED BY CIVIL DESIGN SOLUTIONS, INC. DATED 10-08-2018. 3. MONITORING WELLS AND PIEZOMETERS WERE DIGITIZED FROM FIGURE 3, DETAILED SITE MAP, DATED JULY 2017 AND DEVELOPED BY CEC, INCLUDED IN APPENDIX E OF THE PERMIT APPLICATION ANSON COUNTY LANDFILL PHASE 5, DATED 12-21-2018. 4. STORMWATER FROM THE NORTH SIDE OF PHASE 4 CELL 2 WILL BE DIRECTED TOWARD BASIN T13 DEVELOPED IN 2022. MATERIAL FOR PHASE 4 CELL 2 CONSTRUCTION WILL COME FROM THE 2023 CONSTRUCTION BORROW AREA. THE 2023 CONSTRUCTION BORROW AREA WILL BE GRADED TO DRAIN TOWARD BASIN 9 DEVELOPED IN 2022. THE SITE EROSION CONTROL PLAN WILL BE UPDATED TO INCORPORATE 2023 CONSTRUCTION ACTIVITIES. 5. THIS REVISED SUBGRADE PLAN IS DEVELOPED UNDER THE ASSUMPTION THAT THE PERIMETER CHANNEL, ACCESS ROAD, AND TRUCK PAD WAS BUILT TO THE GRADES INCLUDED IN THE 05/31/2023 CONSTRUCTION PLANS. 6. SITE TO DETERMINE LOCATION AND DEVELOPMENT OF CELL ACCESS LOCATION BASED ON OPERATION CONDITIONS. COPYRIGHT ® 2024 WEAVER CONSULTANTS GROUP, LC. ALL RIGHTS RESERVED. EXISTING PHASE 2 \ I r\ I / o I / 3 8 30 - 41 - 00- i9 \\ \ ' CHECK VALVE INSTALLATION I JUST INSIDE RAINFLAP BERM/CELL VUA' �N9f D EXISTING CULVERT TO - _ - N : • Q I l=, BE AVOIDED-320-- _ _ SEA4 + Lj 051678 01 /18/2024 COPYRIGHT p 2024 WEAVER CONSULTANTS GROUP, LC. ALL RIGHTS RESERVED. PHASE N r 0 50 100 SCALE IN FEET I EGENt7 — — - LIMITS OF WASTE PHASE BOUNDARY - CELL BOUNDARY 350 EXISTING CONTOUR N 460000 STATE PLANE GRID 322.5 PHASE 4 CELL 2 EAST CONSTRUCTED TOP OF PROTECTIVE COVER CONTOUR 319.5 PHASE 4 CELL 2 WEST TOP OF PROTECTIVE COVER CONTOUR i - f — — f - LEACHATE LINE 7��/7JJJJ7 TIE-IN ZONE 7��/7JJjj INTERCELL TIE-IN ZONE 2023 PREVIOUSLY INSTALLED FORCEMAIN 0 B-9 DIGITIZED PIEZOMETER OR WELL DESIGNED TOP OF CLAY ----300----- LINER CONTOUR (SEE NOTE 2) (SEE PREVIOUSLYNOTE 5) STALLED SILT FENCE \ — — — — TEMPORARY 4" SDR-11 FORCEMAIN 1 FUTURE PHASE 4 CELL 2 WEST REDEVELOPMENT AREA 1 NOTES: 1. EXISTING CONTOURS AND ELEVATIONS PROVIDED BY FIRMATEK, LLC. COMPILED FROM AERIAL PHOTOGRAPHY \ FLOWN 02-20-2023. 2. PHASE 1 AND 2 DESIGN TOP OF CLAY LINER CONTOURS OBTAINED FROM FIGURE 1-PERMIT AIRSPACE LINER GRADES PREPARED BY CIVIL DESIGN SOLUTIONS, INC. DATED 10-08-2018. 3. MONITORING WELLS AND PIEZOMETERS WERE DIGITIZED FROM FIGURE 3, DETAILED SITE MAP, DATED JULY 2017 AND DEVELOPED BY CEC, INCLUDED IN APPENDIX E OF THE PERMIT APPLICATION ANSON COUNTY LANDFILL PHASE 5, DATED 12-21-2018. 4. STORMWATER FROM THE NORTH SIDE OF PHASE 4 CELL 2 WILL BE DIRECTED TOWARD BASIN T13 DEVELOPED IN 2022. MATERIAL FOR PHASE 4 CELL 2 CONSTRUCTION WILL COME FROM THE 2023 CONSTRUCTION BORROW AREA. THE 2023 CONSTRUCTION BORROW AREA WILL BE GRADED TO DRAIN TOWARD BASIN 9 DEVELOPED IN 2022. THE SITE EROSION CONTROL PLAN WILL BE UPDATED TO INCORPORATE 2023 CONSTRUCTION ACTIVITIES. 5. THIS REVISED SUBGRADE PLAN IS DEVELOPED UNDER THE ASSUMPTION THAT THE PERIMETER CHANNEL, ACCESS 1 ROAD, AND TRUCK PAD WAS BUILT TO THE GRADES INCLUDED IN THE 05/31/2023 CONSTRUCTION PLANS. 6. SITE TO DETERMINE LOCATION AND DEVELOPMENT OF CELL ACCESS LOCATION BASED ON OPERATION CONDITIONS. 7. CONTRACTOR TO REMOVE PORTIONS OF ACCESS TRUCK PAD TO ALLOW FOR DEVELOPMENT OF REVISED WESTERN PORTION EXCAVATION PLAN AND TEMPORARY SUMP. FLOW TO LEACHATE STORAGE AREA 0 50 100 SCALE IN FEET I EGENt7 - - - - - - LIMITS OF WASTE PHASE BOUNDARY - CELL BOUNDARY 350 EXISTING CONTOUR N 460000 STATE PLANE GRID 322.5 PHASE 4 CELL 2 EAST CONSTRUCTED TOP OF PROTECTIVE COVER CONTOUR 319.5 PHASE 4 CELL 2 WEST TOP OF PROTECTIVE COVER CONTOUR - f - - f - LEACHATE LINE 7��/7JJJJ7 TIE-IN ZONE 7��/7JJjj INTERCELL TIE-IN ZONE 2023 PREVIOUSLY INSTALLED FORCEMAIN PREVIOUSLY INSTALLED PHASE 4 CELL 1 FORCEMAIN 0 B-20 DIGITIZED PIEZOMETER OR WELL PREVIOUSLY INSTALLED SILT FENCE TEMPORARY 4" SDR-11 FORCEMAIN FUTURE PHASE 4 CELL 2 WEST REDEVELOPMENT AREA DIRECTION OF LEACHATE FLOW NOTES: 1. EXISTING CONTOURS AND ELEVATIONS PROVIDED BY FIRMATEK, LLC. COMPILED FROM AERIAL PHOTOGRAPHY FLOWN 02-20-2023. ���> w l V 1 I I 1111 /I/// �` ZH CAR p �o ••oE ESS/Q,y. _ SEAL _ 051678 I- 01 /18/2024 COPYRIGHT ® 2024 WEAVER CONSULTANTS GROUP, LC. ALL RIGHTS RESERVED. 24" PROTECTIVE COVER K > 1.9x10-4 cm/s 2'-0" 60-MIL TEXTURED HDPE GEOMEMBRANE 1'-6" I—III=1 . DEPTH VARIES 1 PREPARED SUBGRADE NATURAL 3 INORGANIC SOIL OR COMPACTED STRUCTURAL FILL i 18" COMPACTED CLAY LINER K < 1x10-5cm/s DOUBLE -SIDED HEAT -BONDED DRAINAGE GEOCOMPOSITE (TRANSMISSI K > 5x10-4 m%s) WITH 8 OZ/SY NON -WOVEN GEOTEXTILE-BOTH SIDES 24" PROTECTIVE COVER K > 1.900-4 cm/s 2'-0" 60-MIL TEXTURED HDPE GEOMEMBRANE I—III=1 . DEPTH VARIES 1 L— PREPARED SUBGRADE NATURAL 3 INORGANIC SOIL OR COMPACTED STRUCTURAL FILL 18" COMPACTED CLAY K < 1 x10-5 cm/s DOUBLE -SIDED HEAT -BONDED DRAINAGE GEOCOMPOSITE (TRANSMISS K > 5x10-4 m%s) WITH 8 OZ/SY NON -WOVEN GEOTEXTILE-BOTH SIDES PHASE 4 CELL 2 WEST I PHASE 4 CELL 2 EAST 10'-0" 10'-0" 10'-0" LEACHATE LINE DRAIN LINER TIE-IN ZONE 5'-0" / REINFORCED GEOSYNTHETIC CLAY LINER COMPACTED FILL (GCL) K < 100-9cm/s RAIN FLAP 2'-0" / `ILL A REA IV —V LEACHATE LINE DRAIN �1 I DEPTH 3 j VARIES EXTEND GEOMEMBRANE LINER (7' INTO TIE-IN ZONE) EXTRUSION WELD (WELD RAIN FLAP TO GEOMEMBRANE ON FLOOR) WIDTH VARIES 60-MIL TEXTURED— HDPE GEOMEMBRANE PREPARED SUBGRADE NATURAL - INORGANIC SOIL OR COMPACTED STRUCTURAL FILL REINFORCED GEOSYNTHETIC CLAY LINER (GCL) K < 1 x10-9 cm/s EAST INTERCELL TIE—IN L5 (SEE NOTE 1) n a 0 3 6 SCALE IN FEET PHASE 4 CELL 2 WEST (FUTURE REDEVELOPMEN' 18" COMPACTED CLAY LINER K < 1x10-5cm/s DOUBLE -SIDED HEAT -BONDED DRAINAGE GEOCOMPOSITE (TRANSMISSIVITY K > 5x10-4 mYs) WITH 8 OZ/SY NON -WOVEN GEOTEXTILE-BOTH SIDES NOTE: 1. A RAINFLAP BERM WILL BE INSTALLED TO ALLOW LEACHATE TO DRAIN TO A CENTRALIZED LOCATION IN PHASE 4 CELL 2 EAST. IN THIS CENTRALIZED LOCATION, ADDITIONAL ROCK WILL BE ADDED AND AN INTERIM RISER WILL BE UTILIZED AS AN ACCESS POINT TO EXTRACT LEACHATE UTILIZING A TYPICAL PUMP.THE LEACHATE WILL BE PUMPED THROUGH A TEMPORARY 4" SDR-11 FORCEMAIN WHICH WILL BE CONNECTED TO THE PREVIOUSLY INSTALLED FORCEMAIN. PHASE 4 CELL 2 EAST THE RAINFLAP AND ASSOCIATED LEACHATE COMPONENTS WILL BE REMOVED UPON APPROVAL OF PHASE 4 CELL 2 (CONSTRUCTED) WEST TO ALLOW FOR CONTINUED FLOW OF LEACHATE TO EXTRACTION POINTS AT THE EDGE OF PHASE 4 CELL 2 WEST. LINER TIE-IN ZONE 5'-0" TEMPORARY 4" SDR-11 FORCEMAIN RAIN FLAP COMPACTED FILL / 2'-0" / / FILL AREA 4'x8' PLYWOOD 2 (3/8" THICK) 1 3 60-MIL TEXTURED EXTEND GEOMEMBRANE LINER-HDPE GEOMEMBRANE (7' INTO TIE-IN ZONE) PREPARED SUBGRADE NATURAL — INORGANIC SOIL OR COMPACTED EXTRUSION WELD (WELD RAIN STRUCTURAL FILL FLAP TO GEOMEMBRANE ON FLOOR) REINFORCED GEOSYNTHETIC CLAY LINER (GCL) K < 1 x 10-9 cm/s SOUTH INTERCELL TIE—IN L6 (SEE NOTE 1) z" a 0 3 6 SCALE IN FEET 18" COMPACTED CLAY LINER K < 1x10-5cm/s DOUBLE -SIDED HEAT -BONDED DRAINAGE GEOCOMPOSITE (TRANSMISSIVITY K > 5x10-4m�s) WITH 8 OZ/SY NON -WOVEN GEOTEXTILE-BOTH SIDES 24" PROTECTIVE COVER K > 1.9x10-4 cm/S HICIA R p �oE �S SIpH9 SEAL 051678 VL ��%,`�oy••FNGIN�E� ��a,, 01 /18/2024 COPYRIGHT ® 2024 WEAVER CONSULTANTS GROUP, LC. ALL RIGHTS RESERVE). 3'-0" PREPARED SUBGRADE NATURAL - INORGANIC SOIL OR COMPACTED STRUCTURAL FILL END CAP 10'-0" 24" PROTECTIVE COVER LEACHATE LINE DRAIN K > 1.9x10-4 Cm/s 60-MIL TEXTURED HDPE GEOMEMBRANE DEPTH VARIES 1� 3 18" COMPACTED CLAY LINER K < 1 x10'5 Cm/s DOUBLE -SIDED HEAT -BONDED DRAINAGE GEOCOMPOSITE (TRANSMISSIVITY K > 5x10-4 m%s) WITH 8 OZ/SY NON -WOVEN GEOTEXTILE-BOTH SIDES 0 0 0 0 0 U o PHASE 4 CELL 2 WEST (FUTURE REDEVELOPMENT) VARIES 10'-0" LINER TIE-IN ZONE END CAP TO BE REMOVED UPON —I APPROVAL OF PHASE 4 CELL 2 I RAIN WESTERN PORTION AND CONNECT TO PHASE 4 CELL 2 WESTERN LEACHATE COLLECTION PIPE 0 0 EXTEND GEOMEMBRANE (7' INTO TIE-IN ZONE) 4'x8' PLYWOOD (3/8" THICK) 77 0 0 0 PHASE 4 CELL 2 EAST (CONSTRUCTED) BLIND FLANGE 5'-0" 8" DIA HDPE SDR-II PERFORAT/FILL LEACHATE COLLECTION PIPE 1 COMPACTED FILL / DRAINAGE AGGREGATE 2'-0 (K >1x10-2CM/S)// AREA 3 2 INTERIM RISER 0.7 o 0 3'-0„ (MIN) 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ='� EXTRUSION WELD (WELD RAIN FLAP TO GEOMEMBRANE ON FLOOR) REINFORCED GEOSYNTHETIC CLAY LINER (GCL) K < 1 x10-9 cm/s NOTE: 1. A RAINFLAP BERM WILL BE INSTALLED TO ALLOW LEACHATE TO DRAIN TO A CENTRALIZED LOCATION IN PHASE 4 CELL 2 EAST. IN THIS CENTRALIZED LOCATION, ADDITIONAL ROCK WILL BE ADDED AND AN INTERIM RISER WILL BE UTILIZED AS AN ACCESS POINT TO EXTRACT LEACHATE UTILIZING A TYPICAL PUMP.THE LEACHATE WILL BE PUMPED THROUGH A TEMPORARY 4" SDR-11 FORCEMAIN WHICH WILL BE CONNECTED TO THE PREVIOUSLY INSTALLED FORCEMAIN. THE RAINFLAP AND ASSOCIATED LEACHATE COMPONENTS WILL BE REMOVED UPON APPROVAL OF PHASE 4 CELL 2 WEST TO ALLOW FOR CONTINUED FLOW OF LEACHATE TO EXTRACTION POINTS AT THE EDGE OF PHASE 4 CELL 2 WEST. TEMPORARY LEACHATE EXTRACTION POINT L7 (SEE NOTE 1) 2A ` 0 3 6 SCALE IN FEET WYE TO BE REMOVED UPON APPROVAL DOUBLE -SIDED HEAT -BONDED OF PHASE 4 CELL 2 WESTERN PORTION DRAINAGE GEOCOMPOSITE (TRANSMISSIVITY AND CONNECT TO PHASE 4 CELL 2 K > 5x10-4 m/s) WITH 8 OZ/SY WESTERN PORTION LEACHATE COLLECTION NON -WOVEN GEOTEXTILE-BOTH SIDES PIPE SYSTEM 18" COMPACTED CLAY LINER K < 1 x1 0-5 cm/S 60-MIL TEXTURED HDPE GEOMEMBRANE PREPARED SUBGRADE NATURAL NORGANIC SOIL OR COMPACTED STRUCTURAL FILL t11CAR Q SEAL 051678 N v•' Q� \��� r 01 /18/2024 COPYRIGHT ® 2024 WEAVER CONSULTANTS GROUP, LC. ALL RIGHTS RESERVED.