EM Scan & Line Locating + GPR · Every BC city · All property types
Two methods find what one method misses. EM traces it. GPR images it. We run both.
Electromagnetic line locating traces conductive utilities — metal pipes, cables, tracer-wired mains — precisely; Ground Penetrating Radar images the rest, including the plastic and clay EM is blind to. Run together they are the standard private locate: the dual-method clearance that makes breaking ground safe, beyond what BC One Call covers. Eight EM techniques, GPR confirmation, all of BC, every property type, and a dedicated track for the trades.
Free phone consult · No pressure · Mon–Sat 8am–6pm PT
EM — the tracer
Electromagnetic line locating
Applies or detects a signal on conductive lines and follows them precisely — identifying which line is which, with depth. Unbeatable on metal pipes, cables, and tracer-wired plastic. Blind to bare non-conductive lines, which is where GPR comes in.
GPR — the imager
Ground Penetrating Radar
Images the subsurface by radar reflection — finding non-conductive plastic and clay lines, concrete ducts, voids, and unknowns EM can't see, and confirming the EM traces. Soil-sensitive, so we set honest expectations per city. Full GPR services →
The eight EM techniques
Each with its own methodology page and dedicated pages for all 47 BC cities:
Direct connection · clamp
Active EM Line Locating
Apply a known frequency to a target line and trace only that line — the precise, unambiguous core of electromagnetic locating. Direct connection or signal clamp puts a traceable signal on a specific conductive utility so it stands out from everything else in the ground.
View + 47 city pagesPower · radio frequency
Passive EM Sweep Locating
Sweep an area for the signals buried metal already carries — live power at 50/60 Hz and re-radiated radio energy — to catch energised and conductive lines before a dig, without connecting to anything. The fast first pass that makes sure nothing live gets missed.
View + 47 city pagesInduction · no access point
Inductive EM Locating
When there's no valve, riser, or bare conductor to connect to, the transmitter induces a locating signal into buried lines from the surface — letting a crew trace conductive utilities in areas where direct connection simply isn't available.
View + 47 city pagesNon-metallic pipes · drains
Sonde Drain & Duct Tracing
Push a sonde — a small battery transmitter — through a non-metallic pipe, drain, or duct, and trace it from the surface as if it were a metal line. The EM answer for plastic, clay, and concrete lines that carry no signal of their own.
View + 47 city pagesNon-metallic mains · permanence
Tracer Wire Locating & Installation
Locate plastic mains through their tracer wire — and where there isn't one, advise on installing it. The permanent way to keep non-conductive water, gas, and irrigation lines findable for the life of the asset.
View + 47 city pagesFaults · breaks · shorts
Cable & Sheath Fault Locating
Pinpoint where a buried cable or tracer wire has failed — a sheath fault, break, or short — so the repair is one targeted excavation instead of a guessed trench. EM fault-finding for the lines that have stopped doing their job.
View + 47 city pagesDepth · as-builts · CAD
Depth Estimation & Utility Mapping
Add the third dimension and a permanent record: estimated burial depth at every point of interest, and a marked, measured map of what's underground — the deliverable that turns a one-day locate into a lasting site asset.
View + 47 city pagesPre-dig · dual-method
EM + GPR Utility Clearance Survey
The complete pre-dig clearance: passive sweep, active EM tracing of every conductive line, GPR imaging for non-conductive lines and confirmation, sonde tracing for drains, and depths at the dig point. The single survey that makes breaking ground safe — and the everyday private locate done right.
View + 47 city pagesFor the pros who break ground
EM + GPR locating, built into your job sequence
A struck line is your delay, your change order, your incident report. We're the private-locate layer that runs after BC One Call and before your machine — dual-method clearance, depths, and documentation, on standing arrangements that keep crews moving. Ten trades, each with its own playbook:
Excavation Contractors
PlaybookPlumbers
PlaybookElectricians
PlaybookDirectional Drilling & Boring
PlaybookGeneral Contractors
PlaybookLandscapers & Hardscapers
PlaybookFencing & Deck Contractors
PlaybookFoundation & Piling Contractors
PlaybookEngineers & Surveyors
PlaybookUtility & Telecom Contractors
PlaybookEvery property type, located
From a backyard fence to a development servicing plan — EM + GPR locating across every property type in BC:
Single-family homes
Private water, irrigation, gas to fire features, and power to garages — none of it on the public locate.
Strata & condominiums
Common-property services, parkade conduits, and shared site utilities mapped before any council-approved dig.
Commercial properties
Site services, parking-area utilities, and tenant-improvement digs cleared dual-method before excavation or coring.
Industrial sites
Process lines, fire mains, and dense utility corridors located and depth-mapped for safe maintenance and expansion.
Institutional & campus
Sprawling buried networks — water, power, comms, district energy — mapped for facilities and capital work.
Government & municipal
Public infrastructure located and documented; the network side runs through our municipal water main hub.
Land development
Pre-design SUE and clearance so servicing plans coordinate against real utilities, not assumptions.
Acreage & rural
Long private service runs and well/septic lines traced across properties where nothing is documented.
EM + GPR locating, answered
What is EM (electromagnetic) line locating?
EM locating finds and traces buried conductive utilities — metal pipes, cables, and tracer-wired plastic mains — by applying or detecting an electromagnetic signal on the line and following it from the surface. Active locating puts a chosen frequency on a specific line (by direct connection, clamp, or induction) for a precise trace; passive locating detects signals already present (live power, re-radiated radio) to sweep an area. It's the conductive half of subsurface locating.
How do EM and GPR work together?
They cover each other's blind spots. EM traces conductive lines precisely but is blind to non-conductive plastic and clay; GPR images the subsurface — including non-conductive lines — but can't label which conductive line is which the way an EM trace can. Run together, EM identifies and traces the metal and tracer-wired lines while GPR catches the plastic, the clay, and the unknowns, and each confirms the other. Dual-method is the standard a defensible private locate is held to.
Why isn't BC One Call enough?
BC One Call notifies member utilities to mark their PUBLIC lines to the property line — it does not locate the privately-owned lines beyond it: your water service, irrigation, private power, gas to outbuildings, septic. Those are the lines most digs actually strike, and finding them is what a private EM + GPR locate does. Every responsible dig uses both: BC One Call for the public locates, a private dual-method locate for everything on your side.
What can EM locating NOT find?
Anything non-conductive with no tracer wire — plastic water mains, PVC/clay sewer, concrete duct — because there's nothing for the EM signal to travel along. That's not a gap we hide; it's why every locate pairs EM with GPR (which images non-conductive lines) and sonde tracing (for drains). The honest locate uses the right tool for each line, which is the entire reason this is a dual-method discipline.
Do you estimate depth?
Yes — EM estimates burial depth at points of interest (crossings, dig locations, conflicts), confirmed by GPR where it matters, and the critical lines are verified by hand-exposure or vacuum potholing before machinery. Depth is an estimate from EM, a measurement only once potholed — we state which is which rather than overselling the number.
Can you provide a permanent utility map, not just paint?
Yes — locates can be delivered as field marks for a same-day dig, or captured as a CAD utility map / as-built and to subsurface utility engineering (SUE) quality levels for sites that will be dug repeatedly or designed against. Paint washes away; a measured map lasts the life of the site and feeds design and conflict analysis.
Do you work for contractors and trades?
Extensively — there's a dedicated track for the pros who break ground: excavators, plumbers, electricians, directional drillers, general contractors, landscapers, fencing and deck crews, foundation and piling contractors, engineers and surveyors, and utility/telecom contractors. Standing arrangements with agreed scope and rates turn locating into a routine, scheduled part of the job. See the EM + GPR for pros hub.
What does EM + GPR locating cost?
Province-wide pricing, no regional premium. A focused clearance (a dig area, a fence line) starts in the low-to-mid hundreds; full-site mapping and SUE-grade work are quoted by scope. The free phone consult gives a firm number in about five minutes: 604-239-9934.
Keep reading: the complete EM locating guide·EM vs GPR — when to use which·utility locating applications
EM + GPR locating in every BC city
Each city page covers local ground conditions (which decide GPR performance) and the private utilities that need locating — start from yours:
Know what's down there before the shovel does.
Licensed and insured · EM + GPR under one crew · Private locating beyond BC One Call · Since 1999. Free phone consult — site, dig, and a firm quote in five minutes.
- Homeowners & strata
- Commercial & industrial
- Land development
- Every BC trade