Ensure that permission to enter private property has been secured before drilling.

Clear all locations proposed for drilling for utilities before the core drill team arrives. When utilities are present, ensure their exact locations are clearly marked by the utility company.

Call 1-800-545-6005 for utility clearance. Calls to this number automatically rotate to the three notification centers. Obtain utility clearance at least 48 hours and no more than 14 days before starting core drilling. You may contact the three notification centers directly as follows:

Texas Excavation Safety System (TESS) 1-800-344-8377
Lone Star Notification Center 1-800-669-8344
Texas One Call 1-800-245-4545

Provide traffic control in accordance with

for approval prior to drilling

.

Fill or plug drill holes 

using bentonite pellets or cement bentonite grout

 to prevent injury to livestock or people in the area and to minimize the entry of surface water into the bore hole. If surface contamination of lower aquifers or cross contamination is a concern, backfill the hole with bentonite pellets or grout. This is especially important in urban areas where ground contamination from leaking underground storage tanks is common. 

To avoid potential settlement or uplift of pavement core, backfill all borings under existing pavement shall be backfilled with bentonite pellets or cement bentonite grout to a minimum depth of 6 inches below the bottom of pavement structure. Then patch the hole with non-shrink grout to the top of pavement

.