NCD980602163_19820701_Warren County PCB Landfill_SERB C_Draft Deviation from Approved Construction Plans-OCR

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Mr. Charles Jeter
Regional Adminstrator
EPA, Reg ion IV
345 Courtland St.
At lanta , Ga. 30365
DIVISION OF ENV IRONMENTAL MANAGIEMENT
GROUNDWATER SEC TION
JULY 2, 1982
RE : N. C. Superfund Project
PCB Landfill
Deviation from Approved Construction Plans
Dear Mr. J eter:
RAFT
Groundwater monitoring wells have recently been irtstalled at the Warren
County PCB Landfill as part of its construction activ ity. While apparently
meeting EPA standards, they do not confonn to North Car~lina Standards which
require additional grouting a nd use of a bentonite s eal
1
above the well screen.
I am requesting that North Carolina be allowed to install four additional ground-
water monitoring wells to replace the four existing uns~tisfactory groundwater
monitoring wells. These replacement wells will be:
1) Installed within 10 feet of the existing wells.
2) Installed with a bentonite seal above the well screen.
3) Installed with grout extending from land surfate to the top of
the bentonite seal.
4) Screened so as to provide monitoring capabilit)' for at least
the top ten feet of the surficial saturated zone at its lowest
expected elevation.
5) Developed using drilling mud or revert as approved on June 24,
1982 via field let ter (Tom Karnoski -N. C. Soiid and Hazardous
Waste Management Branch to Robert Boone -Sverdrup & Parcel).
6) Installed as soon as possible.
7) Wells will be clearly l abeled as monitor wells, not to be used
as a source of water supply.
8) Sampled (2 r eplicates) to assure background quality data is
similar to background samples collected from ttle original wells
prior to any waste disposal . If background wa tj er quality deviates
from t hat of the original wells, a new background water quality data
base line must be established for the new welld as originally required
and prior to any waste disposal.
• Nr . Charles Jeter
Page 2
July 2, 1 982
Upon acceptance of the new wells, the original we!lls will be abandoned
in accordance with North Carolina standards.
If you have any questions, please contact me.
cc: Yu. Jim Scarborough
Mr. 0. W. Strickland
Mr. Perry Nelson
Sincerely,
William Phillips