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Via E-Mail
July 15, 2013
S&ME, Inc.
9751 Southern Pine Boulevard
Charlotte NC 28273
Attention: Mr. Roger Smith, PG
Re: Letter Report for Monitoring Well Installations
WF Silos LLC Property
121 Lancaster Street
Charlotte, North Carolina
H&H Job No. SME-002
Dear Roger:
1.0 Introduction
Hart & Hickman, PC (H&H) is pleased to present this letter report to document the re-
installation of shallow Type II monitoring wells SMW-3R, SMW-4R SMW-8R, and SMW-
9R, and deeper type III monitoring well DMW-1R. The monitoring well installations are
associated with the former North Carolina (NC) Department of Transportation (DOT) asphalt-
testing laboratory site 27-57 at the WF Silos property located at 121 Lancaster Street in
Charlotte, NC. A site location map is included as Figure 1. The monitoring wells were
installed to replace previous monitoring wells, which were abandoned prior to site
redevelopment activities.
2.0 Preparatory Tasks
On June 13, 2013, in preparation of the well installation activities, H&H applied for and
received Mecklenburg County Subsurface Investigation Permit No. 70001701 under NC
DOT’s name. On June 13, H&H additionally notified the NC One-Call System of the
Mr. Roger Smith, PG
July 15, 2013
Page 2
scheduled well installation activities, initiating public utility locating ticket A131643110.
On June 20, 2013, H&H mobilized to the WF Silos LLC Property to commence well
installation activities. H&H contracted Geologic Exploration (GEX), a NC licensed well
driller, to install the five monitoring wells. Prior to performing drilling activities, H&H
checked with Mr. Andy Rankin, the CF Evans Construction Superintendant. Mr. Rankin,
H&H, and GEX walked the site to identify the monitoring well locations and obtain final
grading elevations.
3.0 Well Installation Activities
Once the well locations were located, GEX mobilized a track-mounted Diedrich D-120 drill
rig to advance the monitoring well borings and construct the monitoring wells in accordance
with North Carolina Well Code. The locations of the monitoring wells are depicted on the
attached Figure 2.
Shallow monitoring wells SMW-3R, SMW-4R SMW-8R, and SMW-9R were constructed
using a schedule (sch) 40, 2-in diameter polyvinyl chloride (PVC) riser and sch 40, 2-in, 0.01-
in slotted PVC screen. The shallow monitoring wells were installed at a depth so that the
screens of each monitoring well bracketed the water table.
Deeper well DMW-1 was constructed as a Type III monitoring well. The 6-in sch 40 PVC
surface casing of DMW-1R was installed to a depth of 40 ft. The surface casing was grouted
in place using a Portland Cement and bentonite slurry. After the grout was cured, DMW-1R
was installed within the surface casing to a depth of 60 ft and constructed using a sch 40, 2-in
diameter PVC riser and 5-ft section of sch 40, 2-in, 0.01-in slotted PVC screen.
The monitoring wells were completed with flush-mount completion pads consisting of a 2x2-
ft concrete pad and bolted, 8-in diameter steel manhole. The concrete completion pads were
Mr. Roger Smith, PG
July 15, 2013
Page 3
finished at the elevations provided by Mr. Rankin. The monitoring wells were thoroughly
developed after installation. A summary of the well construction information is provided in
Table 1. North Carolina Well Construction Records are included in Appendix A.
4.0 Investigative-Derived Waste
Investigative-derived waste (IDW) included soil cuttings and decontamination/development
water. IDW was containerized in 55-gallon steel drums. Once monitoring well installation
activities were completed, CF Evans transported the drums to an onsite staging location
identified by Mr. Rankin. A total of 15 drums of IDW were generated including 13 soil
drums and 2 water drums. To verify that the IDW did not exceed RCRA hazardous waste
thresholds, composite soil and water samples were collected in laboratory-supplied sample
bottles for analysis of metals and volatile organic compounds (VOCs) by Toxicity
Characteristic Leaching Procedure (TCLP) methods. The IDW sample analytical results are
provided in Appendix B. Based on the analytical results, the soil and water IDW did not
exceed RCRA characteristically hazardous waste thresholds and was transported and disposed
by the Evo Corporation as non-hazardous waste. Non-hazardous waste material manifests
and certificates of disposal are included as Appendix C.
Mr. Roger Smith, PG
July 15, 2013
Page 4
H&H appreciates the opportunity to work with you on this project. If you have any questions
or require additional information, please do not hesitate to contact me at 704-586-0007.
Sincerely,
Hart & Hickman, PC
Matt Bramblett, PE
Principal
Attachments
cc: (via email) Mr. Ethan Caldwell, NC DOT
APPENDIX A
WELL CONSTRUCTION RECORDS
APPENDIX B
LABORATORY ANALYTICAL REPORT
APPENDIX C
WASTE MANIFESTS AND CERTIFICATES OF DISPOSAL
Table 1
Well Construction Summary
WF Silos LLC Property
Charlotte, North Carolina
H&H Job No. SME‐002
Well ID Total Depth
(ft bgs)
Surface Casing Depth
(ft bgs)
Screened Interval
(ft bgs)
SMW‐3R 20 ‐‐5‐20
SMW‐4R 14 ‐‐4‐14
SMW‐8R 21 ‐‐11‐21
SMW‐9R 19 ‐‐9‐19
DMW‐1R 60 40 55‐60
‐‐ not installed
Notes:
ft bgs ‐ feet below ground surface
SITE
0 2000 4000
APPROXIMATE
SCALE IN FEET
N
U.S.G.S. QUADRANGLE MAP
QUADRANGLE
7.5 MINUTE SERIES (TOPOGRAPHIC)
TITLE
PROJECT
SITE LOCATION MAP
WF SILOS LLC PROPERTY
121 LANCASTER STREET
CHARLOTTE, NORTH CAROLINA
DATE:
JOB NO:
REVISION NO:
FIGURE:
07-12-13 0
1SME-002
CHARLOTTE EAST, NC 1967
REVISED 1988
2923 S. Tryon Street, Suite 100
Charlotte, NC 28203
704.586.0007(p) 704.586.0373(f)
APPENDIX A
WELL CONSTRUCTION RECORDS
APPENDIX B
LABORATORY ANALYTICAL REPORT
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APPENDIX C
WASTE MANIFESTS AND CERTIFICATES OF DISPOSAL