6004_DukeMcGuireLF2_MW5andMW7ReplacementRequest_DIN26526_20160720

S&ME, Inc. 301 Zima Park Road | Spartanburg, SC 29301 | p 864.574.2360 | f 864.576.8730 | www.smeinc.com
June 21, 2016
Duke Energy Carolinas, LLC
526 South Church Street, Mail Code: EC13K
Charlotte, North Carolina 28202
Attention: Ms. Tyler Hardin
[e-mail]
Reference:Proposal for Monitoring Well Replacement
Duke Energy’s McGuire Nuclear Station No. 2 Landfill
12700 Hagers Ferry Road
Huntersville, North Carolina
S&ME Proposal No. 42-1600604
Dear Ms. Hardin:
Per your May 9, 2016 email request, S&ME, Inc. (S&ME) appreciates the opportunity to provide this
proposal to replace two groundwater monitoring wells at the referenced Duke facility. This proposal
provides our understanding of the project and outlines our proposed scope of services, schedule, and
costs.
Project Information
Duke Energy conducts routine groundwater monitoring in proximity to the operating No. 2 Landfill at the
McGuire Nuclear Station. Recent sampling events have indicated a low volume of water in monitoring
wells MW-5 and MW-7 to the point that the wells are infrequently sampled.
We discussed these two wells with Duke Energy’s Lead Environmental Specialist and agreed that the
replacement wells needed to be deeper and constructed with 15-feet of screen.
Scope of Services
Our proposed scope of services includes the following:
♦Prepare a site specific health and safety plan for the monitoring well abandonment and replacement
activities.
♦Provide notification to Mecklenburg County for the abandonment and replacement of the two
monitoring wells.
♦Attend a pre-job meeting with Station personnel prior to commencing on-site work.
Proposal for Monitoring Well Replacement
McGuire Nuclear Station No. 2 Landfill
Huntersville, North Carolina
S&ME Proposal No. 42-1600604
June 21, 2016 2
♦Mobilize drilling equiment to the landfill area to abandon and re-install monitoring wells MW-5 and
MW-7 at the No. 2 Landfill. The approximate locations of the wells to be replaced are shown on the
attached Figure 1.Please note that other wells in proximity to the No. 2 Landfill are not shown.
♦Construct a decontamination pit in the No. 2 landfill area to rinse the down hole drilling equipment
between borings and capture the rinse water.
♦Containerize the rinse water into 55-gallon drums and transport to the maintenance garage area.
♦The existing wells will be abandoned by filling the monitoring well pipe (screen and casing) with a
mixture of powdered bentonite and Portland cement. The mixture will be pumped via tremie pipe
placed near the bottom of the well pipe and pumped until the mixture reaches the ground surface.
Surface completions (protective casings, well pads, etc.) will be removed and transported to the
garage for disposal as solid waste.
♦The borings for the new wells will be off-set within 10 feet from the abandoned well locations and
drilled 10 feet deeper than the prior well depths. The current monitoring wells depths are about 65
and 38 feet for MW-5 and MW-7, respectively. Soil cuttings from the replacement wells will be
spread on the ground in the apparent down gradient direction. Each replacement well will be
constructed with 15 feet of well screen.
♦The abandonment and re-installation of the monitoring wells will be conducted by a North Carolina
certified well driller and in general accordance with the North Carolina Well Construction Standards,
North Carolina Administrative Code Title 15A Subchapter 2C Section .0100.
♦The monitoring wells will be developed by over pumping with a submersible pump until the
discharged water is relative free of suspended soil particles. The development water will also be
containerized and transported to the garage area for disposal.
♦We will coordinate disposal of the drums of rinse water and development water. We have assumed
that prior analytical data will be representative of both and can be used to profile the water off-site.
We have also assumed Duke Energy will provide laboratory data from previous sampling events to
assist in profiling the drums off-site.
♦Collect horizontal coordinates of the replacement wells with hand held GPS receiver.
♦Attend a post-job briefing as directed by Station personnel at the completion of the field work.
♦Prepare a letter report of the monitoring well abandonment and replacement including boring logs
for each activity.
Proposal for Monitoring Well Replacement
McGuire Nuclear Station No. 2 Landfill
Huntersville, North Carolina
S&ME Proposal No. 42-1600604
June 21, 2016 3
Schedule
We estimate four days will be needed to abandon, re-install, and develop the monitoring wells. Disposal
of the development and purge water may take up to three weeks from our receipt of prior analytical data.
We will submit our letter report approximate one week after we receive the disposal manifest from the
disposal vendor.
Authorization
S&ME will perform these services under a Purchase Order and Duke Energy’s Standard Terms and
Conditions for on-site Construction Services with previously negotiated modifications.
Closing Remarks
S&ME appreciates the opportunity to submit this proposal and provide you with our environmental
services. Should you have any questions, please feel free to contact us at 864.574.2360.
Sincerely,
S&ME, Inc.
John Whitehead, P.G.
Senior Geologist
[e-mail]
Enclosures: Figure 1 – Monitoring Well Replacement Locations
t:\proposals\2016\env\42-1600604 mcguire nuclear station monitoring well replacement\jww (tdh) 42-1600604 proposal.docx
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