7500 HARDESON RD 2021-06-09 - Laserfiche WebLink

1 volume able to contain 10% of the total enclosed container volume of all con- tainers, or 110% of the capacity of the largest container within its boundary, whichever is greater. • Secondary containment facilities shall be impervious to the materials stored therein for a minimum contact time of 72 hours. • Secondary containment facilities shall be maintained free of accumulated rain- water and spills. In the event of spills or leaks, accumulated rainwater and spills shall be collected and placed into drums. These liquids shall be handled as haz- ardous waste unless testing determines them to be non-hazardous. ' • Sufficient separation should be provided between stored containers to allow for spill cleanup and emergency response access. . During the wet weather season (Oct 1 —April 30), each secondary containment facility shall be covered during non-working days, prior to and during rain events. . Keep material storage areas clean, organized and equipped with an ample supply of appropriate spill clean-up material (spill kit). . The spill kit should include, at a minimum: 1 0 1-Water Resistant Nylon Bag • 0 3-Oil Absorbent Socks 3"x 4' O 2-Oil Absorbent Socks 3"x 10' 0 12-Oil Absorbent Pads 17"x19" O 1-Pair Splash Resistant Goggles ' 0 3-Pair Nitrite Gloves • 10-Disposable Bags with Ties ' 0 Instructions BMP 154: Concrete Washout Area Purpose ' Prevent or reduce the discharge of pollutants to stormwater from concrete waste by con- ducting washout off-site, or performing on-site washout in a designated area to prevent pollutants from entering surface waters or ground water. Conditions of Use IConcrete washout area best management practices are implemented on construction projects where: 2014 Stormwater Management Manual for Western Washington iVolume II- Chapter 4 -Page 317