2019-01-09_PERMIT FILE - C1981019 ‎(2)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 1/9/2019
• Doc Name: Collom Facilities Geotechnical Drilling Program
• Section_Exhibit Name: Exhibit 27 Item 5
• Media Type: D
• Archive: No

EXHIBIT 27, ITEM 5
I. INTRODUCTION
The Collom Facilities geotechnical drilling will consist of a drilling program in order obtain data
to enhance the final design of the buildings to be constructed. This drilling program will obtain
subsurface geological and geotechnical information the Collom facilities pad. If encountered,
bedrock samples will be collected and evaluated for rock quality, rock type, weathering and
hardness.
I. DRILL HOLE SPECIFICS
Twenty-five drill holes will be drilled on the Collom facilities pad as shown on Figure Exh. 27,
Item 4. Drill hole depths will range from 20 to 60 feet. All borings will be logged by a geologist
or geotechnical engineer and recorded on a field -boring log.
II. BACLFILLING OF DRILLED HOLES
Since all borings will be shallow and not intended to penetrate subsurface coal seams the drill
holes will be backfilled with drill cuttings and marked with a wooden stake. Drill-hole locations
will be surveyed and mapped for future reference.
Revision Date: 12/20/18
Revision No.: MR -195