3402_HanesMillRdMSWLF_comment_CQA_Cell5_DIN27405_20170214

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Chao, Ming-tai
From:Chao, Ming-tai
Sent:Tuesday, February 14, 2017 2:08 PM
To:'Plummer, Michael'
Cc:'Jan McHargue ([e-mail])'; '[e-mail]'; Heim, Susan A
Subject:comments on the CQA Report- Winston-Salem Hanes Mill Rd Cell 5 Construction
Certification, DIN 27405
Hi Mike: DIN 27405

I have completed a review of the CQA report for the Phase 2, Cell 5 Construction (DIN 27325) and several
comments are made for clarification and/or collecting additional data which are not available in the CQA
report. The comments are:

1. Please provide the following data or info in the CQA report:
i. Please provide a copy of the pre-construction meeting record/document including participant
sign-sheet and meeting agenda according to Permit Condition No. 3, Attachment 2 of the Permit
To Construct (PTC) dated October 8, 2010 (DIN 8572).
ii. Please provide the well or piezometer abandonment logs (as shown the Section 7 of the CQA
Report, on Page 24) according to Permit Condition Nos. 7 & 9, Attachment 2 of the PTC dated
October 8, 2010 (DIN 8572).
iii. Please provide the well completion log for the landfill gas monitoring well MM-12 adjacent to
Cell 5 prior to receiving permitted waste for disposal. Section 7 of the CQA report (on Page 40)
states the well ID is MMW-22 which is inconsistent with the ID shown on drawing Sheet 00G-
04 of the PTC Permit Application. Please verify and make a necessary correction.

2. (Section 3.3.1) Please add a statement(s) to describe if the requirement of testing compaction effort at
the subgrade underneath the test strip liner/test pad was successfully conducted according to the
specification of Part 3.1A.6 of Technical Specification Section 02276 – 7.

3. (Section 4.2.4) The Part 2.1 of Technical Specification Section 02800-4 requires the reinforced GCL is
used on the sloped area (slopes greater than 10%). Please describe in the section if this requirement was
implemented in the construction of the landfill cell (West Slope Area).

4. (Appendix B1)
i. The lab testing results of standard proctor test (ASTM D 698) and hydraulic conductivity test
(ASTM D 5084) for the soil samples DS4-1 through DS4-13 are not available in Appendix B-1.
Please provide the lab results.
ii. The lab testing results of standard proctor test (ASTM D 698) for the soil samples DS4-14 &
DS-18 were used as reference in Appendix B-2, but the test results are not available in Appendix
B-1. Please provide the lab results
iii. The lab testing results of standard proctor test (ASTM D 698) for the soil samples DS4-14 &
DS4-20 were used as reference in Appendix B-3, but the test results are not available in
Appendix B-1. Please provide the lab results.

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5. (Appendices B1, C1 & C2) The soil sample DS4-11 (in Appendix B1) and Sample Test Pit # 3 & #11
(in Appendix C1) and Stockpile Sample No. 2 (in Appendix C2) have hydraulic conductivities (K)
higher than the minimum value K of 1 x 10-5 cm/sec (Technical Specification Section 02276 –
9). Please indicate the soil borrows/stockpiles represented by these soil samples did not used as clay
liner material in the narrative Section 3.2.2 of the CQA report.

6. (Appendix B3) Please respond the following comments:
i. According to test result in Appendix B1, the soil sample DS4-11 has a hydraulic conductivity
(K) of 2.9x10-5 cm/sec which is higher than the minimum K of 1 x 10-5 cm/sec (Part 3.3.B of
Technical Specification Section 02276 – 9). Please explain why the soil borrow/stockpile
represented by this soil sample can be used as clay liner material.
ii. Please provide the moisture and density relation result (according to ASTM D 698) of soil
sample D4S-26 (referenced value for in-place soil density testing conducted on 06/27/2016).
iii. According to Part 3.1.A.8 of Technical Specification Section 02276 – 7, please provide the
laboratory hydraulic conductivity test results on three (3) composite soil samples (one for each
lift of the test strip).

7. (Appendix B5) Please provide gradation test results for the leachate collection stones – NCDOT #78M
& NCDOT#5 according to Part 3.2 of the Technical Specification Section 02240-3 & the narrative
Section 3.4 of the CQA report.

8. (Appendix C3) Five (5) of eight (8) compaction effort tests (CQA test) at the test strip failed to meet the
minimum criteria – 95% of maximum dry density.
i. Please explain what remedial measures were taken to correct the compaction procedures
according to the Section 2.5.4.2 of the approved CQA plan.
ii. Have the repaired areas be re-tested to ensure the minimum compaction effort is achieved? The
narrative Section 3.2.2 of the CQA report must address these concerns.

9. (Appendix D1) Please provide the additional data in the CQA report according to Technical
Specification Section 02800- GCL.
i. Written subgrade (compacted soil liner) acceptance documents according to Part 1.3.B of the
specification.
ii. Post-installation documents as specified in Part 1.4.B.1, 2. 3. & 4 of the specification.
iii. According to the dimensions (15.5-ft by 150-ft per roll) and total number of rolls (78), the
maximum square footage of the GCL arrived at the project site can only cover 181,350 square
feet, approximately 4.16 acres. The constructed Cell 5 has the lined waste footprint
approximately 14 acres; it is evident that the data in Appendix D1 is not complete. Please
provide additional MQC data.

10. (Appendix D2) Please provide a copy of the 20-year Manufacturer’s warranty of the specified HDPE.

11. (Appendix D3) Please provide the results of transmissivity testing of specified drainage composite
according to the Part 2.3A of Technical Specification Section 0277-3.

12. (Appendix G2) The following repair locations and nondestructive test results that are shown on the as-
built drawing – Sheet No. 1 are not available in the Repair Log. Please provide data: (a) the locations in
the fire damaged area - R309(5), R311(4), R312(4), R313, R314(4), R315, R316, R317, R318, R319-
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DT62 (The numbers inside the parenthesis are duplicate number). (b) The locations in the “insert area” –
R310, R311, &R312.

13. (Appendix G4- Seaming Log)
i. The Seam No. P13/P73, P22/P82 & P22/P83 are likely typos. According to the panel layout
drawing (as-built drawing Sheet No. 1), the Seam Nos. should be P14/P73 & P23/P82 &
P23/P83, respectively. Please verify and make necessary correction in the log.
ii. The seaming data between the following panels are not available in the log: P50/P51, P54/P102,
P54/P48, P102/P48, P84/P111 & P82/P109. Please provide testing data.

14. (Appendix G5- Non-Destructive Test Log)
i. Please provide the testing data conducted at the seam between these two panels – P17/P77.
ii. The test results at seams between the following panels are not available in the log: P50/P51,
P54/P102, P54/P48, P102/P48, P84/P111 & P82/P109. Please provide testing data

15. (Appendix I: as-built drawing Sheet No. 1)
i. The repair testing locations at the capping area inside the fire damage area are identical, such as
four R314, three R312, four R311, five R309. Should each repair location have the unique
identification number?
ii. The repair location R217-DT54 is likely the typo. To be consistent with the repair log, the
correct identification number is R219-DT54.
iii. The following data in the Repair Log but are not available on the as-built drawing Sheet No. 1:
R320, R321, R322, R323, R66A. Please add the repair locations to the as-built drawing.
iv. The Panel P-136 is mentioned in the logs in Appendix G but can’t located on the as-built
drawing.
Please contact me if you have any questions of the above-mentioned comments.

By the way, we need to conduct a pre-operating meeting in compliance with the Permit Condition No. 5c of the
Attachment of the PTC (DIN 8572) and final site walk in the coming weeks, please provide several date and
time so we can come up a best available time for the meeting/site walk. Thanks.

Ming Chao
Ming-Tai Chao, P.E.
Environmental Engineer
Permitting Branch, Solid Waste Section
NCDEQ, Division of Waste Management
(Mailing Address)
1646 Mail Service Center
Raleigh, NC 27699-1646

(Street Address)
Green Square, 217 West Jones Street
Raleigh, NC 27603
Tel. [phone]
[e-mail]
http://portal.ncdenr.org/web/wm/sw

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E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties

From: Chao, Ming-tai
Sent: Wednesday, February 01, 2017 3:59 PM
To: 'Plummer, Michael' <[e-mail]>
Cc: Jan McHargue ([e-mail]) <[e-mail]>; [e-mail]
Subject: RE: Winston-Salem Hanes Mill Rd Cell 5 Construction Certification

Hi Mike:

The Solid Waste Section received the certified CQA Report for Hanes Mill Road MSWLF, Phase 2 – Cell 5 on 01/31/2017,
one CD and one hard copy; this CQA Report is uploaded to the tracking system with a DIN 27325. I will review the CQA
this week. Thanks for the submittal and have a wonderful day.

Ming Chao
Ming-Tai Chao, P.E.
Environmental Engineer
Permitting Branch, Solid Waste Section
NCDEQ, Division of Waste Management
(Mailing Address)
1646 Mail Service Center
Raleigh, NC 27699-1646

(Street Address)
Green Square, 217 West Jones Street
Raleigh, NC 27603
Tel. [phone]
[e-mail]
http://portal.ncdenr.org/web/wm/sw

E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties

From: Plummer, Michael [mailto:[e-mail]]
Sent: Saturday, January 28, 2017 1:41 PM
To: Chao, Ming-tai <[e-mail]>
Cc: Jan McHargue ([e-mail]) <[e-mail]>; [e-mail]
Subject: Re: Winston-Salem Hanes Mill Rd Cell 5 Construction Certification

Absolutely! I thought you had converted to electronic only.

Sent from my iPhone

On Jan 28, 2017, at 10:16 AM, Chao, Ming-tai <[e-mail]> wrote:
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Hi Mike:

Could you please submit a hard copy and a full-size as-built drawing to me? It is very difficult to
read/review a CQA report from computer screen. Thank you for the corporation on this
matter.

Please send the document to my attention at
Solid Waste Section
1646 Mail Service Center
Raleigh, NC 27699-1646

Ming Chao
Ming-Tai Chao, P.E.
Environmental Engineer
Permitting Branch, Solid Waste Section
NCDEQ, Division of Waste Management
(Mailing Address)
1646 Mail Service Center
Raleigh, NC 27699-1646

(Street Address)
Green Square, 217 West Jones Street
Raleigh, NC 27603
Tel. [phone]
[e-mail]
http://portal.ncdenr.org/web/wm/sw

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E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law
and may be disclosed to third parties.

From: Plummer, Michael <[e-mail]>
Sent: Friday, January 27, 2017 5:45 PM
To: Chao, Ming-tai
Cc: Jan McHargue ([e-mail]); [e-mail]
Subject: Winston-Salem Hanes Mill Rd Cell 5 Construction Certification

All,

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We are placing and electronic copy of the Hanes Cell 5 Construction Certification in the mail to each of
you. I’m going to save you the effort of trying to download a 297 MB file through email. Please let me
know if you have any questions or need additional information.

Thank you and have a good weekend,
Mike

Michael Plummer, PE
Senior Project Manager

HDR
440 South Church Street, Suite 1000
Charlotte, NC 28202
D [704.338.6843] M [704.578.4031]
[e-mail]
hdrinc.com/follow-us

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