DSHW-2010-001185 - 0901a0688015a600

1 December 2008
8200-FY-09-055 RECEIVED
DEC 0 h 2008
UIAM UIVISIUIM 01-
Dennis R. Downs, Executive Secretary SOLID& HAZARDOUS WASTE
Division of Solid and Hazardous Waste ^W^- P37t&
Department of Environmental Quality
P.O. Box 144880
Salt Lake City, Utali 84114-4880
Dear Mr. Downs
Subject: Response to DSHW Letter, November 3, 2008, Operation and Maintenance
Inspection ATK Launch Systems
Promontory Facility, EPA I.D. #UTD009081357
The following are the responses requested in the above referenced letter regarding the 4
issues identified during the Operation and Maintenance Inspection conducted on May
22,2008. ::,,
1. Based on information provided by ATK, wells A-8, A-9, B-7 and C-4 are
currently not operational since the dedicated pump for each weHno, longer works.
Permit condition IV.D.l .b states that existing monitoring wells shall be
maintained in a fully operational condition for the duration ofthe permit. Please
identify how ATK plans to address this issue. In addition, please provide an
evaluation ofthe condition ofthe screens for these wells.
Response:
ATK acknowledges that some ofthe dedicated pumps are not operational. Wells
A-9 and B-7 are operational. The dedicated pumping systems have been removed
and the wells are open to sampling using the approved Hydrasleeve. Wells A-8
and C-4 currently contain dedicated pumping systems that will be removed within
the next year. This will satisfy the requirements of condition 1 V.D. Lb ofthe
permit allowing the wells lo be sampled and thus operational per the permU.
As ofthe last sampling event for each well the screens in these wells were
considered to be in good working order. No indication exists that would suggest
that the well screens are in disrepair.
2. Permit condition IV.D.2.a. states that well construction shall follow the
techniques described in the EPA TEGD. According to the TEGD it is
recommended that monitoring-well screens not exceed ten feet in length. Based
on the "Monitoring Well X-5 Installation Report" X-5 was completed with a 20-
fobt well screen. Please explain why a 20-foot screen was used in well X-5.
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