3412-OldSalisburyRdCDLF_2ndcomment_PermitApp_LOS_FID1387206_20200109

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Chao, Ming-tai
To:[e-mail]
Cc:[e-mail]; [e-mail]; [e-mail]; Drummond, Jaclynne; Aja,
Deborah; Heim, Susan A; Stanley, Sherri; [e-mail]
Subject:Comments on the permit application (FID1386646), OSR CDLF, 34-12, FID XXX
Hi Jan:

Happy New Year.

The Solid Waste Section (SWS)completes a review of the revised permit application for OSR C&DLF, Permit
No. 3412-CDLF-1995 and has few comments on the permit application document below:
1. (Section 2.5) The last sentence of the first paragraph states that “The CAB area is a 20.8- acre section of
the site…” The statement is confusion. Based on information obtained during the site visit conducted
on January 09, 2020, the SWS concludes that the CAB area is relocated along with the C&D waste
disposal activities and needs of the site operations. The CAB storage unit is not located at working face
of the landfill resulting in not interference with any waste disposal activities and is not temporarily
stored on top of the closed landfill units. All processed CAB are utilized at the landfill facility. Please
incorporate the above-mentioned field operations to this section.

2. (Section 2.6) The slope stability analysis and calculations are included in Appendix K, not Appendix J.
Please correct the typo.

3. (Section 2.13) The Design Hydrogeological Investigation Report is placed in Appendix I, not in
Appendix H. Please correct the typo.

4. (Section 3.2) The CQA plan is placed in Appendix J, not in Appendix I. Please correct the typo.

5. (Appendix G – Technical Specification Section 31 23 00)
i. What are the CQA testing frequencies for the soil classification, Atterburg limits & PI (Part
2.1A) & grain size analysis (Parts 3.2B.3 & 3.2D.2)?
ii. Is there any CQA testing (including test item and frequency) on the specified geotextile filter
fabric (Part 3.1B)? Shall the manufacturer of the geotextile filter fabric provide the MQA test
data for Engineer approval?
iii. Please specify the testing frequency of ASTM D698 for compaction characteristics of a fill
material.
iv. Please specify the testing methods and frequencies of in-place density and moisture content of a
compacted soil layer (Part 3.3E).

6. (Appendix C, Section 2.6) According to the drawing Sheets 00C-01 & 02, the location of the TDDSS is
enclosing a portion of the closed landfill cap (a 2-feet soil cap). According to the discussions at the site
visit conducted on January 09, 2020, the OSR C&DLF agrees to relocate the TDDSS boundary outside
the closed landfill cap and plans to build a new route via Friedburg Church Road to access the TDDSS
unit, so the public can drop off the storm debris without using the existing haul road toward the landfill
unit.
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i. Please revise the drawing Sheets 00C-001 & 02 to show new boundaries of the TDDSS and
proposed new route to access the TDDSS unit.
ii. Please update the acreage of the TDDSS unit (the new extent of the unit shall be less than 14.6
acres) in Section 2.6.

7. (Appendix G – Technical Specification Section 31 38 40)
i. Part 1.5A should specify the minimum criteria of the shear strength of the compacted soil liner -
cohesion = 0 and friction angle = 30 degree per conclusions of the slope stability
analysis/calculation in Appendix K.
ii. Part 2.1E should specify the maximum hydraulic gradient to be used in the test of hydraulic
conductivity of a selected material.
iii. Test method of ASTM D5321 that is specified in Part 2.1F is a testing to determine the interface
friction angle between an earthen material and a geosynthetic material. Because the proposed
final cover system is a clay cap and no geosynthetic liner material is to be used at this project, the
applicability of the specified testing method is questionable. Should the testing method be
specified in this section meet the worst condition that 3 to 1 soil slopes may endure in the future,
such as long wet season/saturated and undrained condition.
iv. Parts 2.2.C.5 & 3.1.B should specify the testing frequency of interface friction (or shear strength)
test as stated in Part 2.1F.

8. The following technical specifications should be added in Appendix G:
i. Vegetation/seeding species and schedules per approved Erosion and Sediment Control Plan (ref.
Drawing No. ES-05).
ii. Turf reinforced matting (ref. Sheet 00c-04).
iii. Gas trench and vent matting (ref. Sheet 00D-01).

9. Appendix H – Drawings
(Sheet 00C-02) The cross-reference of details should be x/00D-0X, not X/000-0X. Please correct the typos.

Please contact me if you have any question of the comments. Have a wonderful day.

From: Chao, Ming‐tai  
Sent: Monday, December 23, 2019 11:09 AM 
To: [e-mail]; [e-mail]; [e-mail]; [e-mail]; 
[e-mail]; Drummond, Jaclynne <[e-mail]>; [e-mail]; Stanley, 
Sherri <[e-mail]>; Heim, Susan A <[e-mail]>; Aja, Deborah 
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<[e-mail]> 
Subject: RE: [External] Baker, Audri P. shared the folder "Winston‐Salem" with you. 

Dear all:

The Solid Waste Section received the revised permit application which is uploaded to Laserfiche with a FID
1386646. Thank you for the submittal.

Merry Christmas and Happy New Year.

Best wishes,

From: Baker, Audri P. <no‐reply‐[e-mail]>  
Sent: Friday, December 20, 2019 5:16 PM 
To: [e-mail]; [e-mail]; [e-mail]; [e-mail]; Chao, Ming‐tai 
<[e-mail]>; Drummond, Jaclynne <[e-mail]>; [e-mail]; Stanley, 
Sherri <[e-mail]>; Heim, Susan A <[e-mail]>; Aja, Deborah 
<[e-mail]> 
Cc: Baker, Audri P. <[e-mail]> 
Subject: [External] Baker, Audri P. shared the folder "Winston‐Salem" with you. 

CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to 
[e-mail] 

On behalf of the City of Winston-Salem, HDR is pleased to provide this link to the
OSR Permit Renewal resubmittal documents. A complete sealed pdf is provided, as
well as a complete pdf with tracked changes to facilitate your review of the
revisions. Each file includes a copy of the response to comments letter.
Please let me know if you have problems accessing the files. Thank you,
Audri Baker

This link only works for the direct recipients of this message.

 Ming-Tai, Chao
Environmental Engineer, Solid Waste Section
Division of Waste Management
North Carolina Department of Environmental Quality
919.707-8251 (Office)
[e-mail]
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Winston-Salem 

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