Underground utility locating surveys are performed for a variety of reasons and to accomplish various tasks.
When DRILLING environmental monitor wells or for vapor test soil samples the purpose of the utility survey is clearance of your proposed drill/sample points. You desire to test without striking or damaging any existing underground utilities.
When TRENCHING in a new utility you are locating the utilities in the area of the excavation to:
1) to find the least congested path on site to avoid the existing utilities
2) to avoid damaging the existing utilities you must trench across
3) locating utilities that must be re-routed due to conflicts with your proposed trench
NEW STRUCTURES-locate all traceable utilities that conflict with a new structure. Locate existing water, gas, telephone, sewer,etc… to be capped off and re connected after structure is built
GRADING - locating existing utilities when grading a future building site.
MAPPING PURPOSES – locate all existing utilities to create an accurate site plan
Note: Goldak Inc. can not locate non metallic utilities like PVC water pipes, fiber optic phone cable, transite water main pipes, etc..
Non-metallic sewer laterals can be located and marked by inserting sondes into the sewer lateral and locating the sonde as it traverses through the sewer lateral
The common procedure(s) for locating the utilities on a given site are as follows:
1–Visual inspection of the site noting all visible and locatable utilities
a – Locate & mark noted utilities using a Model 5600-SI or a Traid2310
2 – Scan the site for any utilities carrying current using a passive locator
3 – Using a 902 sub-scanner we search for any unknown metallic utilities or conductible anomalies
4 – If searching for potential UST’s (underground storage tanks) or ferris anomalies you will use a GA-52Cx Magnetometer
Note: These surveys can not tell you the size of the utility or the number of utilities if many pipes and cables are grouped together
Depth can be accurate if you are locating a sonde. The depth readings on metallic pipe are done on a best effort basis and can not be guaranteed
All utilities located will be marked with either chalk, marking flags, and/or spray paint. Goldak Inc. will color code the located utility per USA marking standard if possible. White spray paints marks are used to indication unknown or unidentifiable utilities.
Goldak Inc. does not provide maps
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