DSHW-1990-002427 - 0901a06880155fac

HERCULES > HercSBft Aerospace Company
Missiles, Ortdnance and Space Group
Bacchus Works
Magna, Utah 84044-0098
[phone]
Mr. & Mrs.^Meyerhoffer
6910 West 3800 Souty
West Valley City, Utah
Re: Test Results on Well
Dear Mr. & Mrs. Meyerhoffer,
f(
May 11, 1990
Utah Dept Ol ! !eaH^i
Burjiu Oi' b' /;i;:1
I have enclosed the test results pertaining to the samples that Hercules'
personnel collected from your well on Monday, March 5, 1990. I am happy to
inform you that all samples were clean. These results are for the organic
analysis test. If there had been traces of solvents in your water, this test
would have detected and reported them.
If you would like a more detailed explanation of these test results,
please call me at 251-3574 or Shannon Storrud, of my staff, at 251-5006.
Also, feel free to contact Mr. Don Verbica, Utah Department of Health at
538-6170 if you wish. Thank you very much for your patience and help.
Sincerely,
E. Richard Anderson, Manager
Manager, Environmental
Planning and Operations
ERA/SJStorrud/alc/7080s
Attachment
cc: With Attachment
M. K. Muir, Ph.D SLCHD
Without Attachment
C. R. Eubanks EUW3
S. D. Hirschi X1P2
D. L. Nicponski PA1A5
D. Verbica UBSHW.^;;
BW-1000/689 IRev 2/881
Reply to the Bureau of Solid and Hazardous Waste Letter Dated Page 2
March 30, 1990
The deep piezometer DP.3 re-development and sampling is also part of this
present Scope-of-Work which began May 7th, 1990 and is scheduled to be
completed by mid-June 1990.
B. UBSHW Comments:
3. "The information used for the large grid for the ground water models
north of the NIROP property boundary is questionable. The majority
of off-site wells are installed at a considerably deeper depth than
the Hercules wells. The off-site wells could be located in a
different aquifer. The wells could be under a confined or partly
confined condition. Because the off-site control is so poor, ground
water flow and contaminant transport could be considerably different
than the models predicted."
4. The proposed location of the off-site wells might not intercept the
plume as predicted and additional wells could be required to
delineate the plume.
Reply; Hercules agrees that there is limited off-site data available in
which to incorporate into the modeling effort. However, these models are
the best scientific inference we have at predicting flow rates and degree
of contamination off-site. To commit to the large expense of off-site
drilling without using some basis (modeling) for decision making would
not be prudent. Additional data received during our off-site well
drilling will obviously be incorporated into the model which can only
increase the models predictive capability and our understanding of a
complex problem. Hercules further understands that additional wells
other than those specified in the NIROP Work Plan could also be required
to delineate the off-site plume providing that the placement of these
additional wells can significantly contribute important information.
C. UBSHW Comment:
5. Hercules should consider implementing a source remediation program as
soon as possible to prevent further contamination from migration
off-site.
Reply: Hercules has already conducted and is presently conducting field
investigations in attempts at locating the source of the contamination of
the groundwater under the NIROP property. Several field and aerial
photography surveys were conducted by Hercules' Environmental Operations
and EarthFax Engineering personnel dating as far back as 1988 in attempts
at locating the most likely sites for investigation. A Geo-physical
Magnetic Survey was conducted in July, 1989 by AWD Consultants in an
attempt to locate buried drums. Another field survey and soil sampling
project including test pits, was conducted by James M. Montgomery
Consulting Engineers, Inc. under contract to the U.S. Navy during January
1990, this later project was part of a real estate transfer.
Reply to the Bureau of Solid and Hazardous Waste Letter Dated Page 3
March 30, 1990
All of these investigations have been unsuccessful at locating a
distinct contaminant source. Hercules is presently drilling into two
earthen sumps (N-4 & N-6) in the NIROP facility in an attempt to
locate the TCE contaminant source, no laboratory results are
available at this time. Hercules is still evaluating options
concerning remediation of the contaminated aquifer including aquifer
restoration, containment or varying degrees of both
restoration/containment including issues such as the point of
compliance, cost and risk to the community and the environment.
If you or your staff have any questions conceming this letter, please
contact Shannon Storrud, of my staff, at 251-5006
Sincerely,
E. R. Anderson, Manager
Environmental Planning
and Operations
ERA/SJStorrud/alc/7076s
cc; R.
R.
J.
C.
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S.
T.
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L.
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E.
J.
Peterson
Novak
McCord
Eubanks
Hirschi
Jew
Winder