ENVIRONMENTAL DRILLING PROJECTS

No two environmental drilling projects are alike. Our crews are flexible and know every option that can be applied to your project. This is a sampling of the hundreds of high-profile projects we’ve safely and successfully completed for our clients.

CH2M Hill
Location	Value	Rig Types
Railroad Tie Treatment Facility, Oregon		Limited access rigs, auger
Description: To auger drill 23 water-flooding wells and abandonment of four monitoring wells to depths of 90-feet. Rock coring of basalt. Auger drilling with air rotary Odex rig to install 17-8" diameter DNAPL extraction wells and 6-8" hydraulic containment wells.

TRS
Location	Value	Rig Types
Santa Monica, CA	>$1,000,000	Limited access rigs, auger.
Description: Auger drilling to install over 800 ERH electrodes, temperature points and vapor extraction wells up to 65' in depth. As many as six rigs were used to maintain project schedule. Installation of multiple soil vapor wells, vent points and temperature points. 85% of the project was drilled inside a building utilizing specialized limited access rigs with overhead clearances as low as 8'.

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Arcadis
Location	Value	Rig Types
Southern California	>$1,000,000	Hollow Stem Auger, Sonic, Direct Push, Vacuum Truck pre-drilling hole clearance rig.
Description: Drilled multiple injection and extraction wells to depths of 200’. Wells were originally specified to drill mud rotary due to the depth. Cascade worked with the client to determine the most cost effective drilling method for the project.  In the end, it was determined that the project could be completed with Hollow Stem Augers, saving the client a substantial amount of money.

Confidential Industrial Facilities
Location	Value	Rig Types
Industrial facilities with petroleum, solvent and PCD and dioxin contamination; Northwestern Washington State	>$850,000	Hollow Stem Auger, Sonic, Direct Push, Vacuum Truck pre-drilling hole clearance rig
Description: Drill and set 150 - 2" monitoring wells up to 25' in depth with hollow stem auger. Holes pre-cleared for utility clearance with a vac truck. Initial site investigation with direct push rig and both full-sized and compact sonic rigs. Drill and install multiple thermal remediation wells, electrodes and temperature monitoring wells. Sites facilities had challenging, difficult access.

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Major Retail Gasoline Facilities
Location	Value	Rig Types
Retail gasoline filling stations; Puget Sound Region, Washington State	>$3,000,000 per year
Description: Drill and set in excess of 800 - 2" monitoring wells per year for all major gasoline retailers. Depths from 10' up to 150' with hollow stem auger, direct push, air rotary, and sonic –full size and compact. Holes pre-cleared for utility clearance with a vac truck. Most sites are active and drilled with full safety barricades with minimal facility disruption.

Puget Sound Wood Treating Facility
Location	Value	Rig Types
Wood treating facility; Puget Sound Region, Washington State	>$1,000,000	Hollow Stem Auger, Hydropunch water sampling, Vacuum Truck pre-drilling hole clearance rig.
Description: Drill and set in excess of 100 - 2" monitoring wells from 50' up to 100' with hollow stem auger. Work involved CME continuous soil sampling and multiple hydropunch water sampling.

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