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HomeMy WebLinkAboutD-373104M r- C? r- N U) S TEMPORARY EROSION/SEDIMENT CONTROL- (TESC) GENERAL NOTES GENERAL REQUIREMENTS 1. THE ESC FACILITIES SHOWN ON THIS PLAN MUST BE CONSTRUCTED PRIOR TO OR IN CONJUNCTION WITH ALL CLEARING AND GRADING ACTIVITIES IN SUCH A MANNER AS TO ENSURE THAT SEDIMENT— LADEN WATER DOES NOT ENTER THE DRAINAGE SYSTEM OR VIOLATE APPLICABLE WATER QUALITY STANDARDS. WHEREVER POSSIBLE, MAINTAIN NATURAL VEGETATION FOR SILT CONTROL. 2. THE ESC FACILITIES SHOWN ON THIS PLAN ARE THE MINIMUM REQUIREMENTS FOR ANTICIPATED SITE CONDITIONS. DURING THE CONSTRUCTION PERIOD, THESE ESC FACILITIES SHALL BE UPGRADED (E.G., ADDITIONAL SUMPS, RELOCATION OF HIGH VISIBILITY FENCE AND ADDITIONAL BERMS, ETC.) AS NEEDED FOR UNEXPECTED STORM EVENTS. ADDITIONALLY, MORE ESC FACILITIES MAY BE REQUIRED TO ENSURE COMPLETE SILTATION CONTROL. THEREFORE, DURING THE COURSE OF CONSTRUCTION IT SHALL BE THE OBLIGATION AND RESPONSIBILITY OF THE CONTRACTOR TO ADDRESS ANY NEW CONDITIONS THAT MAY BE CREATED BY HIS ACTIVITIES AND TO PROVIDE ADDITIONAL FACILITIES OVER AND ABOVE THE MINIMUM REQUIREMENTS AS MAY BE NEEDED. 3. THE ESC FACILITIES SHALL BE INSPECTED BY THE PERMITTEE/CONTRACTOR DAILY DURING NON —RAINFALL PERIODS, EVERY HOUR (WORKING HOURS) OR EVERY EIGHT HOURS (NON —WORKING HOURS) DURING A RAINFALL EVENT AND AT THE END OF EVERY RAINFALL, AND MAINTAINED AS NECESSARY TO ENSURE THEIR CONTINUED FUNCTIONING. IN ADDITION, TEMPORARY SILTATION PONDS AND ALL TEMPORARY SILTATION CONTROLS SHALL BE MAINTAINED IN A SATISFACTORY CONDITION UNTIL SUCH TIME THAT CLEARING AND/OR CONSTRUCTION IS COMPLETED, PERMANENT DRAINAGE FACILITIES ARE OPERATIONAL, AND THE POTENTIAL FOR EROSION HAS PASSED. WRITTEN RECORDS SHALL BE KEPT DOCUMENTING THE REVIEWS OF THE ESC FACILITIES. 4. THE ESC FACILITIES ON INACTIVE SITES SHALL BE INSPECTED AND MAINTAINED A MINIMUM OF ONCE A MONTH OR WITHIN 48 HOURS FOLLOWING A STORM EVENT. 5. THE ENGINEER HAS THE AUTHORITY TO HALT CONSTRUCTION IF EROSION CONTROLS ARE NOT MAINTAINED PROPERLY OR IF A VIOLATION HAS NOT BEEN CORRECTED. THE CONTRACTOR SHALL BEAR ALL RISK AND ALL COSTS OF ANY WORK DELAYS CAUSED BY THESE ACTIONS. RECOMMENDED FOR APPROVAL BY BY BMPs INSTALLATION, MAINTENANCE, AND DISCHARGES 1. INLET PROTECTION SHALL BE INSTALLED IN ANY ROAD OR PARKING LOT DRAINAGE SYSTEM INLETS, EXISTING OR NEWLY INSTALLED, WHICH ARE LIKELY TO RECEIVE RUNOFF FROM THE DISTURBED AREAS DURING CONSTRUCTION. INLET PROTECTION SHOWN ON THE TESC PLANS ARE APPROXIMATE LOCATIONS. THE CONTRACTOR SHALL ADD INLET PROTECTION AS NECESSARY TO ALL CATCH BASINS THAT RECEIVE STORM WATER RUNOFF WITHIN THE PROJECT AREA AND THAT MAY OR MAY NOT BE SHOWN ON THE TESC PLANS. 2. AT NO TIME SHALL MORE THAN 1 FOOT OF SEDIMENT BE ALLOWED TO ACCUMULATE WITHIN A CATCH BASIN. ALL CATCH BASINS AND CONVEYANCE LINES SHALL BE CLEANED AT THE COMPLETION OF THE PROJECT. THE CLEANING OPERATION SHALL NOT FLUSH SEDIMENT -LADEN WATER INTO THE DOWNSTREAM SYSTEM. 3. THE CONTRACTOR SHALL NOT CONVEY RUNOFF TO THE BIORETENTION SWALE GRADING UNTIL THE PROJECT SITE DRAINING TO THE BIORETENTION AREA HAS BEEN STABILIZED AND AUTHORIZATION IS GIVEN BY THE ENGINEER. PRIOR TO THE AREA BEING STABILIZED AND BIORETENTION SWALES BEING PLANTED, RUNOFF SHALL BE PREVENTED FROM ENTERING THE BIORETENTION SWALES. 4. ALL DENUDED SOILS MUST BE STABILIZED WITH AN APPROVED TESC METHOD (E.G. SEEDING, MULCHING, PLASTIC COVERING, CRUSHED ROCK) WITHIN THE FOLLOWING TIMELINES: A. MAY 1 TO SEPTEMBER 30 - SOILS MUST BE STABILIZED WITHIN 7 DAYS OF GRADING. B. OCTOBER 1 TO APRIL 30 - SOILS MUST BE STABILIZED WITHIN 2 DAYS OF GRADING. C. STABILIZE SOILS AT THE END OF THE WORKDAY PRIOR TO A WEEKEND, HOLIDAY. OR PREDICTED RAIN EVENT. 5. WHERE SEEDING FOR TEMPORARY EROSION CONTROL IS USED, FAST GERMINATING GRASSES SHALL BE APPLIED AT AN APPROPRIATE RATE (EXAMPLE: ANNUAL OR PERENNIAL RYE APPLIED AT APPROXIMATELY 80 POUNDS PER ACRE). 6. WHERE STRAW MULCH IS USED FOR TEMPORARY EROSION CONTROL, IT SHALL BE APPLIED AT A MINIMUM THICKNESS OF 2", AND BE CERTIFIED WEED FREE. 7. ALL WORK AND MATERIALS SHALL BE IN ACCORDANCE WITH CITY OF RENTON STANDARDS AND SPECIFICATIONS. 8. THE ESC FACILITIES SHALL BE CONSTRUCTED IN ACCORDANCE WITH THE DETAILS ON THE APPROVED PLANS. LOCATIONS MAY BE MOVED TO SUIT FIELD CONDITIONS, SUBJECT TO APPROVAL BY THE ENGINEER AND THE CITY OF RENTON INSPECTOR. 9. A COPY OF THE APPROVED EROSION CONTROL PLANS MUST BE ON THE JOB SITE WHENEVER CONSTRUCTION IS IN PROGRESS. 10. CLEARING LIMITS SHALL BE DELINEATED WITH A HIGH VISIBILITY FENCE. 11. OFF -SITE STREETS MUST BE KEPT CLEAN AT ALL TIMES. IF DIRT OR MUD IS DEPOSITED ON THE PUBLIC STREET SYSTEM, THE STREET SHALL BE IMMEDIATELY CLEANED WITH POWER SWEEPER OR OTHER EQUIPMENT. ALL VEHICLES SHALL LEAVE THE SITE BY WAY OF THE CONSTRUCTION ENTRANCE AND SHALL BE CLEANED OF ALL DIRT THAT WOULD BE DEPOSITED ON THE PUBLIC STREETS. J. STICK anwx. J. WILSON xccxcoR. CHUNG NO- REVISION BY DATE APPR —'6. ATCHISON sc..c. N/A �� DATUM BMPs INSTALLATION, MAINTENANCE, AND DISCHARGES (CONTINUED) 12. IF ANY PART(S) OF THE CLEARING LIMIT BOUNDARY OR TEMPORARY EROSION/SEDIMENTATION CONTROL MEASURE(S) IS/ARE DAMAGED, IT SHALL BE REPAIRED IMMEDIATELY. 13. ALL PROPERTIES ADJACENT TO THE PROJECT SITE SHALL BE PROTECTED FROM SEDIMENT DEPOSITION AND RUNOFF. 14. DO NOT FLUSH CONCRETE BY—PRODUCTS INTO THE STORM DRAINAGE SYSTEM. IF EXPOSED AGGREGATE IS FLUSHED INTO THE STORM SYSTEM, IT COULD MEAN RE —CLEANING THE ENTIRE DOWNSTREAM STORM SYSTEM, OR POSSIBLY RE—LAYING THE STORM LINE. 15. THE CONTRACTOR SHALL NOT DISCHARGE TURBID WATER GENERATED FROM CONSTRUCTION ACTIVITIES, DIRECTLY TO ANY STREAMS, STORM WATER SYSTEM INLETS, OR DRAINAGE DITCHES IN ACCORDANCE WITH THE GENERAL PERMIT. 16. THE CONTRACTOR SHALL NOT DISCHARGE ANY CLEANING SOLVENTS OR CHEMICALS UTILIZED FOR TOOL OR EQUIPMENT CLEANING TO THE GROUND. REFUELING OF EQUIPMENT SHALL BE CONDUCTED AWAY FROM THE DRAINAGE FACILITIES AND DONE IN SUCH A MANNER AS TO PREVENT SPILLS FROM ENTERING THE GROUNDWATER OR WATER BODIES (INCLUDING WETLANDS). SPILLS SHOULD BE PREVENTED FROM HITTING THE GROUND PER CSWPPP. 17. THE CONTRACTOR SHALL SET ASIDE A SEPARATE AREA FOR THE WASH —OUT OF CONSTRUCTION EQUIPMENT AND TOOLS. 18. THE CONTRACTOR SHALL PROPERLY DISPOSE OF ALL CONSTRUCTION DEBRIS IN AN APPROVED AND PERMITTED LANDFILL FACILITY. 19. CONTRACTOR SHALL VERIFY THE FEASIBILITY, OBTAIN AN INDUSTRIAL WASTE DISCHARGE AUTHORIZATION PERMIT AND SEEK APPROVAL FROM THE CITY OF RENTON UTILITY DISTRICT PRIOR TO DISCHARGE OF ANY CONSTRUCTION RUNOFF TO THE SANITARY SEWER. SEQUENCE OF CONSTRUCTION THE TYPICAL CONSTRUCTION SEQUENCE SHALL BE AS FOLLOWS: A. CONDUCT PRE -CONSTRUCTION MEETING. B. POST SIGN WITH NAME AND PHONE NUMBER OF TESC SUPERVISOR. C. INSTALL CATCH BASIN INLET PROTECTION. D. INSTALL PERIMETER PROTECTION (HIGH VISIBILITY FENCE, ETC.). E. CLEAR AND GRUB THE SITE. F. INSTALL NEW WATER LINE, CONNECT TO EXISTING. G. REMOVE EXISTING WATER LINE. H. INSTALL NEW STORM DRAIN AND BIORETENTION SWALE. I. CONSTRUCT ROADWAY IMPROVEMENTS, INCLUDING NEW SIDEWALK. J. MAINTAIN EROSION CONTROL MEASURES IN ACCORDANCE WITH PLANS AND MANUFACTURER'S RECOMMENDATIONS. K. RELOCATE EROSION CONTROL MEASURES OR INSTALL NEW MEASURES SO THAT AS SITE CONDITIONS CHANGE, THE EROSION AND SEDIMENT CONTROL IS ALWAYS IN ACCORDANCE WITH THE CITY TESC MINIMUM REQUIREMENTS. L. STABILIZE ALL AREAS THAT REACH FINAL GRADE WITHIN 7 DAYS. M. SEED OR SOD ANY AREAS TO REMAIN UNWORKED FOR MORE THAN 30 DAYS. N. UPON COMPLETION OF THE PROJECT, ALL DISTURBED AREAS MUST BE STABILIZED AND BEST MANAGEMENT PRACTICES BE APPLIED TO REMOVAL OF CONTROLS IF APPROPRIATE. CITY OF RENTON Planning/Building/Public Works Dept. 05/05/201 HARRINGTON AVENUE NE PHASE II SUNSET COMMUNITY - GREEN CONNECTION TESC GENERAL NOTES D-373104