Site De-watering, Tank and Pipe Testing
Temporary Storage Tanks
Semi-Permanent Installation – Tanks must either be 2-hour fire rated (will carry a designation of UL-2085 and are double walled) or be internal to a liquid tight concrete vault. Temporary/Construction Site Use – Must be located in a bermed containment area. In this case, the tank must be installed/located as follows:
- The berm should be about 3 feet out in all directions from tanks.
- The height of the berm must contain the maximum contents of the largest tank + 8 inches –this almost always equates to about a 10 inch tall berm.
- First lay down 2 inches of sand, then water tight barrier (should be minimum 6 mil plastic or rubber), buildup 10-inch berm height with dirt or whatever, lap barrier over berm and weight down with more dirt, put 2 inches of sand in bottom over barrier.
- Storage tanks must be 50 feet from nearest building and property lines.
- It is best to use tanks on skids with pumps (pumps must be UL rated for fuels).
- If using the “tower” or gravity feed type setup, the containment must be wide enough that if either tank falls to the side it will entirely land inside of containment. There must also be a fusible link at the valve that will shut off flow to hose in the event of a fire.
SPILL PREVENTION, CLEAN-UP, AND DISPOSAL
Be prepared to contain spills to prevent spreading. Small areas are easier to clean than large ones. Spill kits are recommended to be kept on hand by anyone working on exterior projects. Spill cleanup materials recommended to be kept on hand may include; sorbent materials such as clay (kitty litter), polypropylene booms and pads, rags and sawdust to contain spills immediately.
Contaminated Material Disposal
Contractor Requirements and Responsibilities
Notification Requirements and Procedures
- Any spill that threatens to enter a storm sewer or watercourse.
- All petroleum spills e.g. hydraulic fluid, transmission fluid, diesel, gasoline, etc.
- Any hazardous or unknown material spill, e.g. many solvents, cleaners, etc.
- Any discharge from your site which you suspect may be in violation of City Code, state regulations, or other applicable laws and regulations, e.g. discharges which are cloudy, foul smelling, colored, contain chemicals or heavy sediment loads.