4104_CityHighPointKerseyValley_MSWLF_ASDAddendumResponse_DIN28394_20170815

August 15, 2017

Sent Via Email – [e-mail]

Mr. Mike Spencer
City of High Point
3748 East Kivett Drive
High Point, NC 27260

Re: Proposed Scope of Work and Additional Work Activities
Alternate Source Demonstration Addendum
City of High Point Kersey Valley Subtitle D MSW Landfill
Guilford County
Solid Waste Permit Number 4104-MSWLF-1991
DIN 28394

Dear Mr. Spencer:

The NC Solid Waste Section has completed a review of the Proposed Scope of Work - Alternate Source
Demonstration Addendum dated June 26, 2017 (DIN 28392) and the Additional Work Activities dated July
28, 2017 (DIN 28393) both submitted on behalf of the City of High Point by Babb & Associates, P.A. for the
City of High Point Kersey Valley Subtitle D MSW Landfill, Solid Waste Permit Number 4104-MSWLF-1991.
The Alternate Source Demonstration dated August 30, 2016 (DIN 27385 and 27899), the Proposed Scope
of Work - Alternate Source Demonstration Addendum, and the Additional Work Activities were submitted
in response to a NC Solid Waste Section letter titled Appendix I Inorganic Constituent Exceedances dated
August 8, 2016 (DIN 26552) and in accordance with 15A NCAC 13B .1633.

A new groundwater monitoring well is proposed to replace the existing upgradient groundwater
monitoring well 4104-MW4. The new groundwater monitoring well is proposed to be located out of the
driveway area and will be drilled to a depth of 30-35 feet. During the drilling of the new groundwater
monitoring well, three to four soil samples will be collected for laboratory analyses for Appendix I metals.
After installation, the groundwater monitoring well will be developed and then sampled the following
day. Three groundwater samples will be collected from the new monitoring well and analyzed for
Appendix I metals. Two groundwater samples will be collected using a new disposable bailer with one
sampling being filtered at the laboratory, and the third groundwater sample will be collected using a
peristaltic pump.

Based upon the review, the Proposed Scope of Work - Alternate Source Demonstration Addendum and the
Additional Work Activities are approved as described. The new groundwater monitoring well (4104-
MW4R) must be surveyed for location and elevation, must have an identification plate permanently
attached, and will hereafter be included as a part of the existing groundwater monitoring well network.

The new groundwater monitoring well should be sampled semiannually and hydraulic conductivity and
effective porosity values should be established for each screened interval to develop groundwater flow
characteristics. Also, within 30 days of the completed construction of the new groundwater monitoring
well, the well construction record (GW-1b form), well schematic, boring log, field log and notes, and
description of well development activities should be submitted to the NC Solid Waste Section.

If you have any questions or concerns regarding this letter, please feel free to contact me by email at
[e-mail] or by phone at 828.296.4706. Thank you for your continued
cooperation with this matter.

Sincerely,
Jaclynne Drummond
Compliance Hydrogeologist
Solid Waste Section, Division of Waste Management
NCDEQ

cc sent via email: Ellen Lorscheider, Solid Waste Section Chief
Jason Watkins, Field Operations Branch Head
Ed Mussler, Permitting Branch Head
Deb Aja, Western District Supervisor
Christine Ritter, Permitting Hydrogeologist
John Patrone, Environmental Senior Specialist
Ming Chao, Permitting Engineer
Gary Babb, Babb and Associates