Laserfiche WebLink
Henderson Mine SPCC/MCP May 1999 <br />• 4.0 SPILL PREVENTION AND BEST MANAGEMENT PRACTICES <br />The primary goal of any SPCC plan iSpreventing spillage of materials. As such, there are <br />many factors involved in prevention o$gpills, including but not limited to: operator caze <br />when handling materials, the integrity of the container, proximity to containment <br />structures, how the container is manipulated (forklift, dolly, by hand, etc.), weather <br />conditions, housekeeping factors, indoors versus outdoors, etc. When handling .materials <br />capable of spilling, it is the operator's responsibility to use the proper procedures and <br />equipment to handle the container in such a manner as to reduce the likelihood of <br />spillage. The following discussion will outline the details of several best management <br />practices (BMP's) that minimize spillage risks. <br />4.1 Accumulated Stormwater Management <br />Stormwater (rain, snow and snowmelt) accumulates in outdoor containment areas <br />designed to hold spilled liquids. Most secondary containment areas are designed to hold <br />some stormwater without compromising the ability of the containment stricture to <br />contain a spill. If stormwater accumulates in an amount that may diminish containment <br />capacity, it is sampled-if necessary-and removed. Contaminated water is treated <br />through the waste water treatment system whereas uncontaminated stormwater is <br />allowed to discharge through the permitted stormwater discharge points. Loading and <br />• unloading of bulk materials into tanks is not allowed when excessive stormwater has <br />diminished the holding capacity of a containment structure. <br />4.2 Bulk Tanks and Transfer Stations <br />All tanks containing hazazdous materials or petroleum products aze built with <br />construction materials compatible with the particulaz stored fluids. Also, tank integrity is <br />compatible with conditions for storage, such as operating pressure considerations or <br />piping and valve requirements. This is accomplished by an internal and/or external <br />engineering review during the design phase of the project, and after the operati~>n of the <br />particular storage system to insure the facility's ability to minimize the likelihood of <br />spillage. <br />Tanks storing hazardous materials or petroleum products are constructed above-ground <br />with adequate secondary containment structwes. Properly contained areas within <br />buildings or, in some cases, the building itself will act as secondary containment for <br />indoor tanks. In addition to secondary containment, certain tanks are installed with <br />sensors or alarms to alert personnel in the event of an overflow or rapid draw-down. The <br />need for sensors or alarms is evaluated for all new tanks. <br />• <br />7 <br />