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Home My WebLink AboutMPDES SWPPP Admin 5.18_F2/23/2019 1 BEST MANAGEMENT PRACTICES (BMP) SECTION 5 PERMIT CRITERIA •VOLUME & VELOCITY CONTROL •CONTROL DISCHARGE •MINIMIZE SOIL DISTURBANCE •SLOPE MANAGEMENT •NATURAL BUFFERS •MINIMIZE SOIL COMPACTION AND TOPSOIL RETENTION VOLUME AND VELOCITY CONTROL •SELECT AND DESIGN BMPS THAT ADDRESS THE AMOUNT, FREQUENCY, INTENSITY, AND TOTAL DURATION OF PRECIPITATION; QUANTITY AND QUALITY OF STORM WATER RUNOFF INCLUDING PEAK FLOW RATES AND TOTAL STORM WATER VOLUME; SOIL CHARACTERISTICS FOR THE CONSTRUCTION PROJECT AREA(S) INCLUDING THE RANGE OF THE SOIL PARTICLE SIZES EXPECTED TO BE PRESENT ON THE SITE; AND TIMEFRAMES THE CONSTRUCTION PROJECT WILL BE COMPLETED; •IMPLEMENT AND INSTALL ALL BMPS IN ACCORDANCE WITH GOOD ENGINEERING PRACTICES AND DESIGN SPECIFICATIONS •COMPLETE IMPLEMENTATION AND INSTALLATION OF BMPS BEFORE OR AT THE START OF EACH MAJOR CONSTRUCTION ACTIVITY; •MINIMIZE EROSION WITHIN THE CONSTRUCTION PROJECT AREA; •DIVERT RUNOFF FROM DISTURBED AREAS TO SEDIMENT REMOVAL BMPS; •MINIMIZE SEDIMENT DISCHARGES FROM THE CONSTRUCTION PROJECT AREA;AND •MAINTAIN BMPS IN EFFECTIVE OPERATING CONDITION. CONTROL DISCHARGE •MINIMIZE SCOURING AT OUTLETS AND CHANNELS •INLET PROTECTION •CONSTRUCTION ENTRANCES AND INTERIOR ROADS •STABILIZE DITCHES, SWALES, CHANNELS AND PONDS •RETENTION AND DETENTION FACILITIES WITH SURFACE OUTLETS •PROTECT INFILTRATION FACILITIES MINIMIZE SOIL DISTURBANCES •PROJECT PHASING •NATURAL BUFFERS •NEAR STATE WATERS •DIRECT RUNOFF TO VEGETATED AREAS SLOPE MANAGEMENT •GREATER THAN OR EQUAL TOO 15% •DESIGN AND CONSTRUCT CUT-AND-FILL SLOPES TO MINIMIZE EROSION •DIVERT OFF SITE STORMWATER AND GROUNDWATER AWAY FROM SLOPES AND DISTURBED AREAS •MANAGE RUN ON 1 2 3 4 5 6 2/23/2019 2 MINIMIZE COMPACTION & RETAIN TOPSOIL •MAINTAIN CLEARING LIMITS •PRESERVE TOPSOIL SOIL STABILIZATION •TEMPORARY •STABILIZE DISTURBED AREAS IMMEDIATELY FOR ANY PORTION OF THE PROJECT THAT WILL REMAIN INACTIVE FOR 14 OR MORE CALENDAR DAYS •FINAL •WITHIN ANY PORTION OF THE PROJECT THAT HAVE COMPLETED CLEARING, GRADING, EXCAVATION OR OTHER EARTH DISTURBING ACTIVITIES POLLUTION PREVENTION MEASURES Provide cover, containment and protection for all chemicals, liquids, and wastes Spill Prevention and control measures for vehicle and equipment maintenance Spill Kits and cleanup measures Reporting Process water Fertilizers and herbicides as manufacturer recommended Prevention concrete washout discharge DEWATERING •Groundwater •Surface Water •Stormwater •Process water SPILL CONTROL Number One Goal: Minimize the impact of the spill •Human health and safety •Containment •Protect water SPILL PLAN SHOULD INCLUDE: •SPILL RESPONSE PERSONNEL •IDENTIFICATION OF DEDICATED PERSON(S) TO RESPOND •TRAINING SCHEDULE •SPILL RESPONSE BMPS •LIST OF ALL BMPS AND SPILL KITS AND THEIR LOCATIONS •A LIST OF THE CLEANUP EQUIPMENT AND PROCEDURES 7 8 9 10 11 12 2/23/2019 3 COVER AND CONTAINMENT NO SECONDARY CONTAINMENT PROPER SECONDARY CONTAINMENT SECONDARY CONTAINMENT THE CONTAINMENT SYSTEM MUST HAVE SUFFICIENT CAPACITY TO CONTAIN 10% OF THE TOTAL VOLUME OF ALL CONTAINERS OR 110% THE VOLUME OF THE LARGEST CONTAINER, WHICHEVER IS GREATER. 55 gal drum X 4 = 22o gallons X 10% = 22 gal -OR – 55 gallon drum X 110% = 62 gal SPILL PREVENTION FOR EQUIPMENT MAINTENANCE CONTAIN THE SPILL •Use what is around you to prevent spill from expanding •Spill Kit -Not just kitty litter •Protect or seal inlets / Catchbasins CLEAN UP THE SPILL •KNOW THE POLLUTANT •KNOW YOUR SORBENTS •KNOW DISPOSAL •DO NOT PUT YOURSELF OR OTHER PEOPLE AT HEALTH RISK SPILL KITS COME IN LOTS OF SHAPES AND SIZES Not all are created equal! 13 14 15 16 17 18 2/23/2019 4 SORBENT DIFFERENTIATION ABSORPTION VS. ADSORPTION ABSORB something is taken intoa medium, and disappears as a consequence Why Care? Hydrocarbon capture and re-useDisposal of saturated sorbents Re-suspension of sorbed pollutants ADSORB something gets stuck onto the surface of a medium SPILL LOGS AND REPORTING THE FOLLOWING TYPES OF SPILLS MUST BE REPORTED: •RELEASES OR SPILLS OF HAZARDOUS SUBSTANCES IN AMOUNTS THAT MEET OR EXCEED THE REPORTABLE QUANTITIES IN 40 CFR PART 302. •SPILLS, OVERFILLS, AND SUSPECTED RELEASES FROM UNDERGROUND STORAGE TANKS AND PETROLEUM STORAGE TANKS. •RELEASES OR SPILLS OF ANY MATERIALS THAT WOULD LOWER THE QUALITYOF GROUNDWATER BELOW WATER QUALITY STANDARDS. THE FOLLOWING TYPES OF SPILLS SHOULD BE REPORTED: •SPILLS THAT ENTER OR MAY ENTER STATE WATER OR A DRAINAGE THAT LEADS DIRECTLY TO SURFACE WATER; •SPILLS THAT CAUSE SLUDGE OR EMULSION BENEATH THE SURFACE OF THE WATER, STREAM BANKS OR SHORELINES; •SPILLS THAT CAUSE A FILM, "SHEEN," OR CHANGE THE COLOR OF THE WATER, STREAM BANKS OR SHORELINES; OR •SPILLS OF TWENTY-FIVE (25) GALLONS OR MORE OF ANY PETROLEUM PRODUCT SUCH AS: CRUDE OIL, GASOLINE, •DIESEL FUEL, AVIATION FUEL, ASPHALT, ROAD OIL, KEROSENE, FUEL OIL; PRODUCED WATER, INJECTION WATER, SALTWATER OR COMBINATION THEREOF; AND DERIVATIVES OF MINERAL, ANIMAL, OR VEGETABLE OILS. •DATE •TIME •AMOUNT •LOCATION •IDENTIFY MATERIAL •REASON FOR SPILL •DATE/TIME OF CLEAN UP COMPLETED •NOTIFICATIONS MADE •STAFF INVOLVED •DISPOSAL SPILL LOG WSDOT Spill Reporting Flowchart PROCESS WATER MANAGEMENT FERTILIZERS AND HERBICIDE USE APPLIED IN ACCORDANCE WITH THE APPROVED LABELING 19 20 21 22 23 24 2/23/2019 5 CONCRETE WASHOUT HANDLING SAWCUTTING AND SURFACE POLLUTION Photos courtesy of Robert I. Carr, Ph.D., P.E. BREAK 25 26 27