Lakes Construction Site
Tabernacle Township, Burlington County
POTABLE WELL TESTING
of 9 July 2004
To date [July 2004] sampling has identified a total of twelve homes
in the area with mercury contamination over the state standard (11 have
been confirmed), ten homes with Tetrahydrofuran (THF) contamination (only
eight of which have been confirmed after three rounds of sampling), one
home with lead contamination over the state standard, one home with Tetrachloroethene
(PCE) and Trichloroethene (TCE) contamination over the state standard
and one home with vinyl chloride contamination over the state standard.
There are a total of nineteen homes that have been impacted by one or
more of the contaminants listed above. The homes with mercury, PCE, TCE
and vinyl chloride contamination were eligible to receive a Point-of-Entry
Treatment (POET) system through NJDEP’s Spill Fund Program as an
immediate response to the ground water contamination. The POET, installed
by a local vendor, removes the contaminants from all the water used in
the home. Monitoring and maintenance of the system is also provided to
Owners of the homes with THF levels over the standard of 10 parts per
billion as well as the one home with lead contamination, were advised
to use bottled water until an effective treatment or remedy could be recommended.
Tetrahydrofuran is a volatile organic compound that is not commonly seen
in private potable wells. THF is a compound that is frequently used in
cements associated with polyvinyl chloride (PVC) plastic piping. PVC pipes
and cements are sometimes used in wells and/or home plumbing that provide
drinking water. Typically, lead can get into the drinking water from plumbing
and fixtures in the home by way of corrosion. Lead and other metals from
the pipes slowly dissolve in the water resulting in elevated lead results.
MONITORING WELL DATA
In an effort to determine whether THF and lead are present in the ground
water, NJDEP installed four additional monitoring wells in January 2004.
Three wells are located on the Lakes site and one well was installed off
site in the direction of ground water flow. The well depths range from
50 feet to 120 feet. In addition, three other wells previously installed
by the property owners, ranging in depth from 37-48 feet, were also sampled.
Of the seven wells that were sampled in January 2004, five wells showed
detection of lead and one well (120 ft.) showed a detection of THF at
3.4 parts per billion. (Results from all monitoring well sampling
is available for review in the repositories)
FUTURE ACTIONS ON POTABLE WELLS
Based on the results of the January 2004 monitoring well data, NJDEP
is proposing to pay for the installation of deeper wells for homes in
this area that have two samples over the standard of 10 parts per billion
for Tetrahydrofuran. NJDEP is currently in the process of drafting the
well specifications that must be followed for the deeper well installation.
The estimated depth of the deeper wells is 355-415 feet and will be in
the Wenonah Mount Laurel Aquifer. NJDEP is also planning to do additional
potable well testing in this area in an effort to delineate the extent
of the contamination.
The Division of Solid and Hazardous Waste (Division) reviewed the application
for the landfill disruption and prepared a draft approval to disrupt,
screen and remove the waste material for offsite disposal in accordance
with applicable regulations N.J.A.C. 7:26-2A.8(j). The first phase of
the Disruption Approval is for the delineation and investigation of the
landfill waste with exploratory test pits. Provided this investigation
of the landfill confirms non-hazardous waste, they will proceed to the
next phase of the Disruption Approval. The second phase includes the extraction
of the landfill waste and screening of the soil to be accepted as cover
material at a licensed solid waste facility. Approximately 100,000 cubic
yards of debris and solid waste material will be removed and disposed
at a licensed solid waste facility. The excavated waste will be screened
for recoverable material. An annual report will be submitted to the Division
detailing the progress of the extraction of the landfill. Within thirty
(30) days of completion of the removal of the entire landfill, the applicant
will be required to submit a report for the Division’s review. This
report must contain information on the total amount of waste removed,
documentation that waste material has been accepted by the disposal facility,
as-built plans and all sampling results. The property owners will also
be required to sample two of the on site monitoring wells quarterly.
During the review of the disruption request, the Department was working
with officials of Tabernacle Township regarding the groundwater contamination
in this area of the site. As part of our efforts to keep the Township
apprised, the draft disruption was sent to the Tabernacle Township for
their comments. On September 30, 2003, the Township sent their comments
on the draft approval. These comments are currently being evaluated to
determine if there are salient issues that must be considered and addressed
before the landfill disruption approval can be issued. A response to the
September 30, 2003 letter and any modification to the disruption approval
will be sent to the Township before the public meeting.
UNDERGROUND STORAGE TANK SUMMARY
On February 16, 1994, twelve underground storage tanks (UST’s)
with various uses were removed. Based upon visual observation and field
instrument readings approximately 150 tons of contaminated soil was also
removed. A total of 45 soil samples were collected from the common excavation
containing the tanks. The soil samples associated with the former diesel
UST’s were analyzed for total petroleum hydrocarbons (TPHC). All
results were below 1,000 parts per million, which is the Department’s
trigger level for additional investigation. All soil samples associated
with the former gasoline UST’s were analyzed for volatile organic
compounds and lead.
On November 11, 2002, forty soil samples were collected below the former
UST inverts and analyzed for compounds specific to each of the UST’s.
No compounds were identified in excess of the Department’s most
stringent soil cleanup criteria. On January 10, 2003 ground water samples
were collected from monitoring wells MW-1, MW-2 and MW-3. These wells
were installed to evaluate possible impacts to ground water from the former
UST’s. MW-2 contained ethylbenzene (15.1 ppb) and total xylenes
(89.2 ppb). Following this sampling event an additional downgradient monitoring
well MW-4 was installed in order to further delineate the ground water
contaminant plume. On December 30, 2003 a second ground water sampling
event was conducted utilizing MW-1 through MW-4. During the gauging event
traces of free product (suspected gasoline) were observed for the first
time in MW-2. MW-2 contained benzene (828 ppb), ethylbenzene (177 ppb),
total xylenes (500 ppb), naphthalene (3,790 ppb) and toluene (471 ppb).
MW-4 contained ethylbenzene (5.19 ppb), total xylenes (11.17 ppb) and
naphthalene (66.3 ppb).
On March 9, 2004, the property owners met with the Department’s
Bureau of Southern Case Management to discuss additional requirements
for soil and ground water investigation and remediation activities related
to the above mentioned UST issues. The property owner is required to confirm
the ground water flow direction, install additional monitoring wells to
horizontally and vertically define the contaminant plume, and conduct
additional ground water sampling.
The 1995 Preliminary Assessment and Site Investigation Report, 2003
Geoprobe and Monitoring Well data as well as the January 2004 Monitoring
Well data are available for review at the designated repositories.
|Tabernacle Township Building
163 Carranza Road
Tabernacle, NJ 08088
Contact: Douglas Cramer, Admin.
||Southampton Township Building
5 Retreat Road
Southampton, NJ 08088
Contact: John Lipsett, Admin
401 E. State Street
Trenton, NJ 08625
Contact: Amanda Coombs
For further information, contact:
NJDEP Office of Community Relations at (609) 341-3118,
or write her in care of:
Office of Community Relations
NJDEP, P.O. Box 413, 401 East State Street, Trenton, NJ 08625-0413
Please be advised that these
cases labeled by OCR as inactive may still be undergoing remedial
activities but OCR has no involvement. Documents that are available
on this page associated with the inactive list may not reflect
the current status of a case.