European Dry Suction Excavation Technologies: A North .

European Dry Suction Excavation Technologies:A North American PerspectiveColin Donoahue / Ox Equipment Inc.Jared Lindeboom / Ox Equipment Inc.Western Regional Gas ConferenceAugust 28 & 29, 2018Henderson, Nevada

Ox Equipment Inc. North American Distributor for German manufactured MTS SuctionExcavation Equipment Based in Ancaster, Ontario, Canada Importation and custom manufacturing Training and support throughout North America Mechanical support program / Ox Care Division of Bartels Group, which includes Super Sucker Hydro Vac ServicesInc.

Vacuum Excavation Equipment / History & OverviewLate 1800s / Pressurizedwater used in mining1990s / Badger Daylighting,Western Canada / Oil Field /Hydrovac1990s to present / NorthAmerican manufacturing /Truck, Trailer, Wet & Dry20181900 Utility industry (CGA, CCGA & GTI) / vacuum excavationis recognized as a “best practice” Smaller less proficient dry vacuums brought to market (trailer) Hydrovac (wet) technologies more effective than dry Industry embraces larger capacity hydrovacs20002005 PHMSA report /excavation damage leadingcause of pipeline accidents

North American (Wet) Vacuum Systems / Challenges Overweight when loaded Slurry generated / increasing costs for disposal Potential for soil contamination when water added to excavation process High pressure water can damage buried infrastructure Undermining during hydrovac excavation process Equipment must leave site for disposal ofslurry / water refilling Slurry often considered contaminated /testing required / special dump sitesrequired

North American (Dry) Vacuum Systems / Challenges 4” diameter suction tube / prone to clogging Low suction / 800 CFM ( /-) Manually operated vacuum hose / operator strain and potential injury Low productivity in larger excavations Filter systems / ineffective Trailer mounted equipment / smaller equipment / small capacity

North American (Dry) Vacuum Systems / Challenges

Dry Vacuum Systems /Advantages No slurry generated Dump on site / stay on site No spoils contamination High levels of material removal No water required Safer process for all buried infrastructures Highly efficient air filtration system / HEPA compatible Quite / less than 85dB @ 20 feet Refuse excavated materials for back-fill Environmentally responsible process

Case Study / Pacific Gas & Electric - California Utilizing 15-20 large hydrovacs under contract in any given day Generating large amounts of wet slurry spoils / considered contaminated until tested Slurry is stored / tested / dried / trucked for ultimate disposal 8 hour round-trip Disposal program costs 30 million per year Looked to “dry” technologies to mitigate excavation costs BTI (Bradley Tanks Inc.) deployed fleet of Dino Suction Excavators

PG&E California / Dry Vacuum Challenges Foremen familiar with Hydrovac technology / Old dog new trick New technology takes time to gain acceptance Smaller “typical” dry vacuum systems leave a bad first impression / commonly utilizedbut only for “potholing” or small excavations Tough (clay) ground conditions difficult / require more “work” when utilizing air tobreak up ground End users did not “see” the back end costs / savings did not effect their budgetingprocess

PG&E California / Summary Eliminated requirements to store, test & truck wet slurry Vacuum equipment can stay on site all day / increased productivity Reduced travel time / congested highways Eliminate overweight loads / fines Eliminates need for water / scarce resource Utilize excavated materials for back fill / reduce costs Overall an environmentally sound process Savings vs. Hydrovac estimated between 500,000 - 750,000 per truck, per year

MTS / Mobile Tiefbau Saugsysteme GmbH Headquarters in Germersheim, Germany Pioneered “Suction Excavation” Systems / 1998 Productive “dry” vacuum technologies World-wide distribution / over 40 countries Multiple world-wide patents / fan & filtration systems Primary “safe dig” technology used throughout Europe Wet “hydrovac” technologies not embraced in Europe

European Suction Excavators

European Suction Excavators / Pier (UK)

North American Dry Suction Excavation EquipmentDino 4.5Dino 8 Equipment is assembled on North American cab & chassis Debris tanks from 4.5 m3 to 12 m3 (6 yd3 to 15 yd3) Twin Fan Technology / patented / 24,000 CFM Self-cleaning filtration system / patented Mechanical Power Arm / 10” diameter suction hose Dual compressor system / 320 CFM @ 116 PSIDino 12

MTS Dino 8 Twin Steer

Debris Container / Side Tipping

Twin Fan Technology Twin Fans generate 24,000 CFM 98% of material is gravity and impact separated & kept in primary container Sound dampeners keep dB ratings safe for public spaces – 85dB Clean air is released through the top Highest levels of “air conveyance” in the industry

Self-Cleaning Filter Technology

Case Study / Pipeline Trench - Ontario Trench 250’ Long x 10” Wide x 2’6” D and auger 2 x 12’ D anode holes in a tight oilpumping station while avoiding any and all buried utility lines. Working inside a protected area where 250’ of new conduit was required to connectto newly installed mechanical components. Dump all material on-site into bins for re-instatement Contractor wanted a clean and dry excavation to perform his work after the trenchwas opened up careful consideration as to how to excavate between and around existing boundariesand structures

Pipeline Trench - Ontario / Summary operators took advantage of the innovative hydrostatic drive All clear digging offered a unique opportunity for the operators to deploy the 4-knifeaggressive IKE attachment to “auger” the holes down to the 12 foot depth hard, dry clay was no match to the rotating blades and the powerful suction Eliminate overweight loads / fines Eliminates need for water / scarce resource Utilize excavated materials for back fill / reduce costs Overall an environmentally sound process 24 cubic metres of material were removed in a 9 hour work day. Work site remained dry

Case Study / Contaminated Soil - Ontario Trench 250’ Long x 10” Wide x 2’6” D and auger 2 x 12’ D anode holes in a tight oilpumping station while avoiding any and all buried utility lines. Working inside a protected area where 250’ of new conduit was required to connectto newly installed mechanical components. Dump all material on-site into bins for re-instatement

Contaminated Soil - Ontario / Summary operators took advantage of the innovative hydrostatic drive All clear digging offered a unique opportunity for the operators to deploy the 4-knifeaggressive IKE attachment to “auger” the holes down to the 12 foot depth hard, dry clay was no match to the rotating blades and the powerful suction

In Summary Vacuum technologies are the safest way to expose buried infrastructure Both wet and dry systems have distinct advantages and challenges New to North America European dry suction excavation systems providealternative to larger wet hydrovac technologies Increased compressor capacity allows for production rates close to hydrovac In many situations dry systems production rates which exceed that of ahydrovac all while providing a safer, more cost efficient and environmentallysustainable solution to a utilities excavation needs

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Division of Bartels Group, which includes Super Sucker Hydro Vac Services Inc. Vacuum Excavation Equipment / History & Overview Utility industry (CGA, CCGA & GTI) / vacuum excavation . Truck, Trailer, Wet & Dry