3420_OmnisourceIndusLF_5thComments_SlopeRepairPlan_FID1339310_20190813

From:Chao, Ming-tai
To:Kemppinen, Hannu
Cc:Winegar, James; Stanley, Sherri; Heim, Susan A; Joyce, Leonard
Subject:RE: [External] RE: Comments on Omnisource Kernersville Slope Repair SW # 34-20
Date:Tuesday, August 13, 2019 1:24:00 PM
Attachments:image003.emzimage008.pngimage011.pngimage006.pngimage007.png
Hi Hannu:
After reviewing your responses to the July 22, 2019 comments on the Slope Repair and
Grading Plan (Plan, FID 1324013) dated June 2019 and received on July 16, 2019, the SolidWaste Section does not agree your responses at all.
Your responses No. 1 stated that “In our review the slope above and below the bench appear to
be 2:1 while the overall and slanted profile line maybe 2.6:1 as you noted.” The 2:1 slopeconfiguration after grading is shown on the “Slope Profile” in Drawing No. CP-01; there is no
other description in the Plan to specify the regraded/ final slope angle at all. It is the commonpractices in the construction industries if anything that is mentioned in the construction
drawings but is not available in the specification or CQA Plan shall be effective as if shown onmentioned in both documents – Specification/CQA Plan and drawings. To avoid any
construction dispute, OmniSource and Labella shall issue a correction to the Plan.
Your responses No. 2 stated “Regarding Plastic Index (PI) we have not defined a range, ratherthe slope stability calculations were based on the proposed soil for the project. The proposed
soil laboratory testing results were included in the submittal to the insurance companyapproving the design and funding for the project.”
The SWS makes a table below to summarize the lab soil testing results from the submitted
Plan.
Sample ID/Test Item KV-1 RM-1
PI (%)30 22
Max. Dry Density(pcf)104 99.4
Optimum WaterContent (%)19.6 24
Shear strength -Cohesion (ksf)0.13 0.29
Friction angle(degree)34.5 33
According to your response the field-testing results of PI (Ref Table 1 of the CQA Plan) fallinto the range between 22 to 30 will be acceptable. What about the in-place density (95% ofthe maximum dry density) and shear strength, please provide the passing criterium for eachtesting result. Make no mistake, an approval from the insurance company and/or thecontacting adjustor or an engineer have no authority over or above the North Carolina SolidWaste Management Rule. Without the minimum passing criteria setting for the requestedtesting shown in the specifications/CQA Plan is meaningless. The SWS shall not approve theplanned slope repair project at all.
Regarding the slope stability analysis, the submitted slope stability analyses failed to meet the
future landfill closure requirement. The analyzed slopes did not include any loading/surchargefrom the wastes seated on top of the slope. The regraded final slope may be acceptable for
this slope repair project, but may not be acceptable for the final site closure.

Please contact myself if you have any questions to complete the submittal.

From: Kemppinen, Hannu <[e-mail]> 
Sent: Monday, August 12, 2019 4:16 PM
To: Chao, Ming-tai <[e-mail]>; Stanley, Sherri <[e-mail]>
Cc: Winegar, James <[e-mail]>
Subject: [External] RE: Comments on Omnisource Kernersville Slope Repair SW # 34-20

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Ming,

I came across this email dated 7/22 you had sent with two of your comments.  I apologize for
forgetting this one. 
1. In our review the slope above and below the bench appear to be 2:1 while the overall andslanted profile line maybe 2.6:1 as you noted. 2. Regarding Plastic Index (PI) we have not defined a range, rather the slope stabilitycalculations were based on the proposed soil for the project.  The proposed soillaboratory testing results were included in the submittal to the insurance companyapproving the design and funding for the project.
Hannu Kemppinen, PG
LaBella Associates | Senior Project Manager
 336-790-2252      direct
336-323-0092      office336-209-7156 mobile

From: Chao, Ming-tai <[e-mail]> 
Sent: Monday, July 22, 2019 11:31
To: Winegar, James <[e-mail]>
Cc: Stanley, Sherri <[e-mail]>; Davis, Amy <[e-mail]>; Heim, Susan
A <[e-mail]>; Kemppinen, Hannu <[e-mail]>
Subject: Comments on Omnisource Kernersville Slope Repair SW # 34-20

Dear Mr. Winegar:
The Solid Waste Section completes a review of the received Slope Repair and Grading Plan(FID 1324013) at the above-referenced inactive industrial landfill facility, permit # 3420-
INDUS-2005 and has few comments below: 1. According to the “Boundary Data” for Slope Stability Analyses, the restored side slopeshould be 20.6 degrees, or approximately 2.6 (horizontal) to 1 (vertical) slope. The 2(horizontal) to 1 (vertical) slope shown on the Slope Profile/ Drawing No. CP-01 isincorrect. Please correct the typo.

2. The CQA Plan (Table 1) and Specifications fail to provide “passing” criterium for eachlisted test item in Table 1. For example, what is acceptable range for the plastic index(PI) by ASTM D 4318? What is acceptable in-place density and moisture contentaccording to the results from Standard Proctor (ASTM D 698)? What is the minimumshear strength (in term of the cohesion and/or friction angle) of the earthen materialaccording to testing method ASTM D 3080?

Please properly address the comments and resubmit the final Slope Repair and Grading Plan. If you have any question of the comments please contact myself. Have a wonderful day.

From: Kemppinen, Hannu <[e-mail]> 
Sent: Tuesday, July 16, 2019 5:28 PM
To: Chao, Ming-tai <[e-mail]>; Stanley, Sherri <[e-mail]>
Cc: Winegar, James <[e-mail]>; Davis, Amy <[e-mail]>
Subject: [External] Omnisource Kernersville Slope Repair SW # 34-20

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attachment to [e-mail]

Ming,
In the attached we are submitting the insurance adjustor approved plans for the Omnisource
Kernersville Facility slope repair.  We understand from your June 5, 2019 correspondence that
the Section wishes to integrate this document into the inactive industrial landfill, Permit # 34-20. 

Hannu Kemppinen, PG
LaBella Associates | Senior Project Manager
336-790-2252      direct
336-323-0092      office336-209-7156 mobile
2211 West Meadowview Road, Suite 101Greensboro, NC 27407
labellapc.com | Your Joyce Engineering Team Under a New Name