DSHW-1990-001128 - 0901a0688013b4a4

y HERCULES 3rcuies Aerospace Company
isiles. Ordnance and Space Group
ga^hus Works
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Utaii Dept. cf Hsalvh
Bureau of Solid'&'Ha^aW%ssie
J. riazardous W;.-.:
September 6, 1990
HAND DELIVERED
Don Verbica
Bureau of Solid atid Hazardous Uaste
Division of Environmental Health
P.O. Box 16690
288 North 1460 West
Salt Lake City, Utah 84116-0690
Re: Variance of Groundwater Sampling Protocol
Dear Mr. Verbica:
As groundwater levels at Bacchus continue to decrease, sampling some of
our wells is becoming increasingly difficult. Presently, there are nine
wells, GW-20, 21, 24, 27, 30, 31, 34, 36, and 55, that we are unable to purge
and sample according to our protocol. They are presently sampled four
quarters/year for inorganic ions, indicator parameters, volatile organics,
information parameters, and field measurements (dissolved metals are added to
this list one quarter/year).
All nine of the above wells are extremely low yielding wells that range in
depth between two feet and seven feet of water. Purging the required three
well volumes will take days. Wells GW-20, 21, 30, 34, and 36 are
contaminated. Historical data shows that the only contaminants found in these
wells are those associated with the volatile organic analysis.
Due to the low groundwater levels, slow recovery, and historical data, we
are requesting peraiission to drop all analysis except field measurements and
volatile organic analysis for the nine wells listed above. We are also
requesting peraiission to purge them to dryness and remain at the well to
record pH, temperature, specific conductance, and collect the VOA samples as
the well recovers. This is the recommended procedure contained in the
Groundwater Monitoring Technical Enforcement Guidance Document (TEGD). We
feel this procedure will allow us to obtain a sample as representative as
possible and allow us to allocate our labor and financial resource more
appropriately.
BW-1000/689 IRev 2/88)
v Variance of Groundwater Sampling Protocol Page 2
We would appreciate a response as soon as possible. We are near the end
of our third quarter sampling campaign.
If you have any questions conceiTiing this letter, please contact
Shane Hirschi, of my staff, at 251-3851.
Sincerely,
^ /cJyUyti '^3^c-*-
E. Richard Anderson, Manager
Environmental Planning
and Operations
ERA/SDHirschi/alc/7485s
cc: S. J. Storrud