The Tolerance Zone
You are invited to attend the FREE ONLINE Dig Safe workshops in March 2022.
Hear excavation safety presentations from the Ministry of Labour, TSSA, Ministry of Environment, IHSA, Late Locates Solutions Working Group, ESA, Ontario One Call, ORCGA, and CATT.
Attendees can bounce in and out! Stay for as long as needed, and attend on different days, to match your schedule.
March 17, 2022
8:00 a.m. - 12:00 p.m.
Click Here to Register
March 29, 2022
8:00 a.m. - 12:00 p.m.
Click Here to Register
March 31, 2022
8:00 a.m. - 12:00 p.m.
Click Here to Register
Please share this invite with all who should attend! Formal invite attached.


We welcome you to the Dig Safe Workshop, sponsored by Cablewave Utility Services.


Cablewave Utility Services provides utility engineering, management, and damage prevention.


Cablewave delivers client value with our expertise and focus on constructability.


We proudly serve Ontario with 4 locations.

We welcome you to the Dig Safe Workshop, sponsored by TownVac Ltd.
We provide safe excavation through Hydrovac Services. We can assist you with your commercial or residential digging and excavation needs, while protecting underground wires, cables, tree roots and or infrastructure.
Contact us for your next project!



Down Under Pipe and Cable Locating specializes in mapping and marking utilities that fall outside of the Ontario One Call system.  We cover both design and constructions areas.Down Under provides contractors and homeowners the utility marking necessary to complete their work with safety and confidence.  Preventing costly construction delays and ensuring their plans accurately reflect all utilities present.


Private utilities can be found on university campuses, in industrial areas and warehouse’s, on the properties of single and multi-family homes and shopping centres.  Down Under employs a variety of utility locating service tools and underground utility locating tools that provide safety, damage prevention and design conflict identification.  For the engineering community, manufacturing facilities, independent contractors, and government agencies.




Ground Penetrating Radar (GPR)This method is used for locating embedded objects in concrete. Not unlike fishing sonar, images are bounced off objects and relayed to our technician’s computer screen, showing only the depth and width of objects. By utilizing such technologies, we can:

• Locate utilities in congested areas

• Locate lateral position and depth

• Detect metallic and non-metallic utilities

• Discriminate closely spaced utilities

• Locate Underground Storage Tanks and more…




Down Under provides contract locating services for public utilities, from peak shaving & over-flow to full contract services. We service Hydro commissions, Municipalities and utility companies with contract and support services for locates. Call us to find out how we can help you achieve higher efficiencies, reduce costs and achieve deadlines! NEED MORE INFO



TSSA Presents:
Frequently Asked Questions about Excavations
What are my regulatory obligations as an excavator?