HomeMy WebLinkAbout1.28 ISDS information Appendix RWSA -BLUE PIT EXPANSION 2012
[Appendix R]
ISDS INFORMATION
DESCRIPTION /DETAILS: This section provides information
pertaining to the existing ISDS system located at the Blue Pit.
THIS SECTION INCLUDES:
• This information is from the Technical Completion Process
Greg Lewicki And Associates, PLLC
11541 Warrington Court Phone: (303) 346 -5196
Parker, CO USA 80138 E -Mail: info@lewicki.biz
June 27, 2012
�'5 system 'at Blue Pit
Molly Orkild - Larson
Garfield County Senior Planner
108 8th Street, Suite 401
Glenwood Springs, CO 81601
Molly:
Fax (303 )-346 -6934
The current ISDS system at the Blue Pit is designed for 5 full time personnel. This
includes the 4 employees in the shop and the one scalehouse person. No other full time
employees will work at the surface level. This ISDS is located near the current shop
building at original ground level. It is functioning properly. The other employees will be
working at the crusher /screen plant or other plants located at the bottom of the pit, as well
as truck operators, who are not stationary. The bottom of the pit is from 60 to 90 feet
below the original surface. The pit level will stay a few feet above the natural ground
water level. The workers at the plants must use porta - potties since the ISDS cannot be
installed at the bottom of the pit, since it is extremely close to the water table. Nan ISDS
were to be installed at the bottom of the pit and a large rain event occurred, water could
temporarily built up in the pit, which would result in contaminated water entering the
water table through the porous gravel which continues deeper than the mining level. This
cannot be allowed.
The porta- potties are the best solution for this situation and they have been used for years
by the personnel working in the pit with no problems. They will be serviced on a weekly
basis from the local contractor, who is Mountain Roll Offs Inc.
Sincerely,
Greg Lewicki, P.E.
Greg Lewicki and Associates