6001_ROSCANS_1997

State of North Carolina
Department of Environment,
Health and Natural Resources 1 • •
Division of Waste Management
James B. Hunt, Jr., Governor p INM � H N R
Jonathan B. Howes, Secretary
William L. Meyer, Director
June 25, 1997
Mr. Scott Brown
Mecklenburg County
Engineering and Building Standards Department
700 North Tryon
Charlotte, N.C. 28202
Re: Information Request for the Harrisburg Road (Permit #60-01) and Holbrooks Road
(Permit #60-02) Sites in Mecklenburg County.
Dear Mr. Brown,
Thank you for working the June 6 meeting into your schedule and for showing me around
both the Harrisburg Road and Holbrooks Road sites. The visits were very beneficial in giving
me a general understanding of the layout of both sites and the water quality monitoring point
locations.
As I discussed with you during the site visits and later by phone, I had some additional
questions about each of the sites. The following summarizes the additional questions and
requests.
Please submit the following within ninety (90) days:
1) Have the site monitoring system data and supply well data for both sites been
reduced to summary tables/charts by Mecklenburg County (County) or the
U.S.G.S.? If so, please send a copy of the summaries to Solid Waste Section
(Section).
2) Please submit a plan of the present sampling program for both sites. This plan
should list and provide an explanation for the sampling frequency, parameter list
and analysis methods, and monitoring locations. Please submit sampling data for
years 1996 and 1997. In accordance with Section policy, please submit copies of
future sampling data to the Section within fifteen (15) days of receipt by the
County.
3) The Solid Waste Section's (Section) boring log and well construction records are
incomplete for both sites. In addition, discrepancies exist in past data reports on
the numbering sequence of the monitoring wells at the Holbrooks Road site.
Please submit summaries of the boring information and well
installation/abandonment records for all the wells that have been installed at both
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sites.
4) Please submit updated site maps, for both sites, that clearly delineate sampling
points (monitoring wells, surface water sampling points, gaging locations), waste
boundaries, facility boundaries, and present contours.
5) Please provide seasonal groundwater potentiometric maps for both sites. The last
potentiometric data received was dated March, 1986.
6) Please perform a survey of all supply wells within a'/4 mile radius of the waste
boundaries at both sites. If obtainable, record the construction (date of
installation, depth, casing type, length and diameter, producing zone(s) and rate,
etc.) and boring data of the supply wells. Please delineate all well locations on a
map, highlighting the wells that have previously been sampled. Do the residences
in the vicinity of the sites have access to a public water supply?
7) The Section is concerned about the influence of the irrigation wells on the
groundwater flow regime. These wells can exacerbate an existing contamination
problem by mobilizing and transporting a plume to previously uncontaminated
areas. The irrigation well influence will complicate the monitoring and defining
of the plume(s), rendering an evaluation of remediative efforts very difficult.
Please send boring, construction and usage data (locations, boring and
construction logs, production rate, usage frequency, etc.) to the Section. Has the
County or U.S.G.S. evaluated the potential influence of the irrigation wells on the
groundwater flow regime at the site? Does the present monitoring system monitor
the irrigation wells zones of influence?
The majority of the above requested information and data is within the scope of routine
reporting requirements for solid waste facilities across the State with the exception of the supply
well survey. Mecklenburg County Solid Waste should have most of the other material on hand.
If you have any questions or comments, please contact me [phone], extension 261.
Sincerel
Mark Poindexter, Hydrogeologist
Groundwater Compliance Unit, Solid Waste Section
c: Phil Prete
Rick Doby
central file
C:\WPDOCS\COUNTIES\MECKLENB\60-01 &2.AST