PERMFILE129924

• Permit No: M1980047
• IBM Index Class Name: Permit File
• Doc Date: 10/20/1980
• Doc Name: MLRD FN 80-47
• From: EXXON CO USA
• To: DNR
• Media Type: D
• Archive: No

bctobcr 20, 1980 -
Uepartment of Natural Resources
Re: MLRB File No. 80-47
Page Five
(i) As indicated on Page E-43 of the application, the operator will
utilize best engineering and design practices to mitigate the
effect of erosion on the spent shale disposal area prior to and
after revegetation. These efforts will include, but not be
limited to, retopsoiling, reseeding and other appropriate and
reasonable erosion control measures, if necessary.
(j) Prior to construction, the operator will provide the Staff
Director with the final design plans for the sediment control
system for review. This plan will include a location map of
sediment ponds in relation to both the drainage areas and areas
of construction activity. The plan will also include a des-
cription of the sequence of construction activities as they
relate to sediment control measures and design parameters for
sediment ponds and spillways.
(4) With respect to Pir. Zimpfer's memorandum of October 8, 1980 to Mr.
James McArdle, the operator commits to the following:
(a) Tl~e operator will, as soon as practicable, specify the location
of the monitoring wells identified as F3R and FSR.
(b) The operator will equip the three surface water monitoring
stations with staff gauges and crest stage recorders.
(5) With respect to the additional hydrology related topics discussed during
the course of our October 9, 1980 meeting, the operator commits to the
following:
(a) The operator will evaluate the possible use of channery materials
in the soil cover to be applied to the processed shale embankment
to reduce soil erosion rates.
(b) The operator will develop a program to monitor erosion rates on
revegetated terraces and slopes on the spent shale disposal area.
The operator will submit this monitoring program to the Staff
Director for review.
(c) Any waste materials deemed "hazardous" for the purposes of the
Resource Conservation ar.3 Recovery Act, 42 U.S.C. 6901 et ~.,
will not be disposed•of in the spent shale disposal area.
(6) With respect to P1r. Roy Cox's memorandum of October 9, 1980 to Mr.
James McArdle, the operator commits to the following:
(a) Prior to construction of the underdrain system for the spent shale
disposal area, the operator will submit said plan to the Staff
Director for review. The underdrain system will be designed,
utilizing best engineering practices, to address the effects of
subsidence and siltation on the system. A reasonable effort will