DSHW-2024-006828

CORRECTIVE ACTION SECTION – SITE VISIT REPORT
SITE NAME: _ ATK Promontory – M-136 LTTAs_________ DATE: __06___/__13___/__2024_____ EPA
ID #: _ UTD009081357___________________________ UTCA ID#: ______________________
LOCATION: __Promontory - 30 miles north of Brigham City, Box Elder County, Utah _____________
PROJECT MANAGER: _ Karen Wallner _____________________________________________________
SITE STATUS
___ Active Investigation
___Ongoing Cleanup Activities
___Confirmation Sampling
_ X _ Long-term Institutional Controls in-place
[Site Management Plan (SMP), Environmental
Covenant (EC), and/or Post Closure Plan (PCP)]
___ Long-term Groundwater Monitoring
OTHER (describe):
PURPOSE OF SITE VISIT
_ X Drive-by (windshield survey)
___Sample Observation &/or Collection
___Site Investigation
___Cleanup Activities Inspection
___Confirm Current Land Usage
___ Confirm Cleanup Completed
___ Confirm Integrity of Engineering Controls
_ X _ Confirm Compliance with SMP/EC
D2# for SMP/EC: DSHW-2018-007182_________
___ Post-Closure Permit Verification
___ Document Change in Land Usage
OTHER (describe)
FIELD OBSERVATIONS:
The M-136 SWMUs consists of 12 LTTAs - 7 through 18. These HWMUs were closed with waste in place
and capped with a 24-inch clay bentonite layer and 6-inch rip-rap rock layer. The sites were inspected to
determine compliance with the EC. In accordance with the EC, the sites are not being used for any
purpose that will disturb the integrity of the 12 LTTA caps or drainage ditches. The sites appear
undisturbed. The sites are devoid of vegetation.
SAMPLE COLLECTION
Were Environmental Samples Collected per the approved Sampling & Analysis Plan?
YES ___ NO _ X _ N/A ___
COMMENTS:
Is the Work Being Performed in a Manner Consistent with the Approved Workplan(s)?
YES ___ NO ___ N/A _ X Unknown (Drive-By Inspection Only) ___
COMMENTS:

CURRENT LAND USAGE
___ Residential
_ X_ Commercial
_ X Industrial
___ Mixed Commercial w/ Residential
___ Under Construction &/or Development
___ Other: __________________________________
COMMENTS:

FUTURE LAND USAGE
___ Residential ___ Mixed Commercial w/ Residential
_ X _ Commercial ___ Other: (describe below)
_ X _ Industrial ___ Unknow at this time
COMMENTS:

POST-CLEANUP SITE VISITS
Is the Completed Cleanup Remedy Still Protective Based on Current Land Use?
YES _ X _ NO ___ Unknown (Drive-By Inspection Only) ___
COMMENTS:

LONG-TERM INSTITUTION CONTROL(S) VERIFICATION
Are Components or Restrictions of the SMP, EC &/or PCP Currently Being Complied with?
YES _ X _ NO ___ Unknown (Drive-By Inspection Only) ___
COMMENTS:

SITE VISIT CONCLUSIONS
M-136 LTTAs appear to be in compliance with the requirements of the EC.

RECOMMENDATIONS
None.

ATTACHMENTS (PHOTOS, MAPS, FIGURES, TABLES, etc.) YES _X_ NO ___
SIGNATURE:

LTTA 7

LTTA 8

LTTA 9 and 10

LTTA 11

LTTA 12

LTTA 13

LTTA 14

LTTA 15 and 17

LTTA 16

LTTA 18