12955 Old Meridian St - SWPPP Notes Sheet C4-2JPS Consulting Engineers - K:\Civil Projects\19JPSC26 Meridian Design Center\Drawings\C4-2 SWPP Notes.dwg August 26, 2019 - 9:33 AM Nvergatos
STORMWATERPOLLUTIONPREVENTIONNOTESAS NOTEDNBVNBVNBVC4-2CONSTRUCTIONDOCUMENTS19 AUGUST 201919JPSC26STABILIZE ALL OPEN AREAS, INCLUDINGBORROW AND SPOIL AREAS.LANDSCAPING AND FINAL STABILIZATION (TOPSOILING, TREES AND SHRUBS, PERMANENTSEEDING, MULCHING, SODDING, RIP RAP)SEE SHEET C100 FOR LOCATION. ALL DISTURBED GROUND SHALL NOT BE LEFT IDLE FOR MORE THAN 2WEEKS WITHOUT SEEDING FOR STABILIZATION. SOIL STOCKPILES SHALL BE SURROUNDED WITH SILTFENCE AND SEEDED IF NOT USED WITHIN 2 WEEKS.SOIL STOCKPILE AND STAGING AREAREFER TO STORMWATER POLLUTION PREVENTION PLAN AND DETAILSSEDIMENT CONTROL MEASURES FOR SHEET FLOW AREASSEDIMENT CONTROL MEASURES FOR CONCENTRATED FLOW AREASSURFACE STABILIZATION (TEMPORARY ANDPERMANENT SEEDING, MULCHING, SODDING, RIPRAP)CONSTRUCTION ACCESS(CONSTRUCTION ENTRANCES,CONSTRUCTION ROUTES, EQUIPMENTPARKING AREAS)CONSTRUCTION PHASE (SPECIFIC ACTIVITIES OREROSION CONTROL PRACTICES)*CONSTRUCTION PHASE (SPECIFIC ACTIVITIES OREROSION CONTROL PRACTICES)*CONSTRUCTION PHASE (SPECIFIC ACTIVITIES OREROSION CONTROL PRACTICES)*GRADE STABILIZATION STRUCTURE LOCATIONS AND SPECIFICATIONSSTORMWATER OUTLET PROTECTION SPECIFICATIONSSEDIMENT BARRIERS AND TRAPS (BASINTRAPS, SILT FENCES, OUTLET PROTECTION)STORMWATER CONVEYANCE SYSTEM(STABILIZED SWALES, STORM DRAINS,INLET AND OUTLET PROTECTION)RUNOFF CONTROL (DIVERSIONS,PERIMETER DITCHES, DAMS, OUTLETPROTECTION)CONSTRUCTION PHASE (SPECIFIC ACTIVITIES OREROSION CONTROL PRACTICES)*CONSTRUCTION PHASE (SPECIFIC ACTIVITIES OREROSION CONTROL PRACTICES)*REFER TO SEASONAL SOIL PROTECTION CHARTMATERIAL HANDLING AND SPILL PREVENTION PLANSTABILIZE CONSTRUCTION ENTRANCE LOCATIONS AND SPECIFICATIONS (AT ALLPOINTS OF INGRESS AND EGRESS)STORM SEWER INLET PROTECTION MEASURE LOCATIONS AND SPECIFICATIONSREFER TO STORMWATER POLLUTION PREVENTION PLAN AND INLET STRUCTURE FILTER DETAILRUNOFF CONTROL MEASURES (E.G. DIVERSIONS, ROCK CHECK DAMS, SLOPE DRAINS, ETC.)LOCATION, DIMENSIONS, SPECIFICATIONS AND CONSTRUCTION DETAILS OF EACHSTORM WATER QUALITY MEASURECONTRACTOR SHALL CONTAIN ANY SPILL OF MATERIALS IN SUCH A MANNER TO PREVENT LEAKAGE INTOA STORM SEWER OR DRAINWAY. CONTACT THE INDIANA DEPARTMENT OF ENVIRONMENTALMANAGEMENT (IDEM) OFFICE OF LAND QUALITY EMERGENCY RESPONSE SECTION, IDEM 24-HOUR SPILLLINE AT 888-233-7745, OR 317-233-7745 UPON DISCOVERY OF AN ACCIDENT TO DETERMINE IDEM'SINVOLVEMENT AND PROCEDURES FOR CLEANUP.TEMPORARY SURFACE STABILIZATION METHODS APPROPRIATE FOR EACH SEASON(INCLUDE SEQUENCING)PERMANENT SURFACE STABILIZATION SPECIFICATIONS (INCLUDE SEQUENCING)MONITORING AND MAINTENANCE GUIDELINES FOR EACH PROPOSED STORMWATERQUALITY MEASURE.* MONITORING AND MAINTENANCE: (1) INSPECT PRACTICES AND REPAIR AS REQUIRED AT LEAST ONCE AWEEK, & (2) WITHIN 24 HOURS OF EVERY 1/2" RAIN EVENT15.14.13.11.12.10.9.7.8.6.5.4.3.INSTALL PRACTICES AFTER PRINCIPAL SEDIMENT TRAPSAND BARRIERS ARE INSTALLED BUT BEFORE LANDGRADING. INSTALL ADDITIONAL RUNOFF CONTROLMEASURES DURING GRADING AS NEEDED.INSTALL PRINCIPAL BASINS AFTER CONSTRUCTION SITEIS ASSESSED. INSTALL ADDITIONAL TRAPS ANDBARRIERS AS NEEDED DURING GRADING.WHERE NECESSARY, STABILIZE SWALES AS EARLY ASPOSSIBLE. INSTALL PRINCIPAL CONVEYANCE SYSTEMWITH RUNOFF CONTROL MEASURES. INSTALLREMAINDER OF SYSTEM AFTER GRADING.CONSTRUCTION OPERATIONSCONSTRUCTION OPERATIONSSTABILIZE BARE AREAS IMMEDIATELY WITH GRAVELAND TEMPORARY VEGETATION AS WORK TAKES PLACE.(UTILIZE EXISTING PAVEMENT SURFACES THROUGHOUTCONSTRUCTION)APPLY TEMPORARY OR PERMANENT STABILIZATIONMEASURES IMMEDIATELY ON ALL DISTURBED AREASWHERE WORK IS DELAYED OR COMPLETED. (NO AREAIS TO BE LEFT UNCOVERED MORE THAN 5 DAYS.)REMOVE TEMPORARY CONTROL MEASURES ANDSTABILIZE.CONSTRUCTION OPERATIONSCONSTRUCTION OPERATIONSCONSTRUCTION OPERATIONSPOTENTIAL POLLUTION SOURCES ASSOCIATED WITH CONSTRUCTION ACTIVITY INCLUDE:SEDIMENT IN RUNOFF FROM EXPOSED SOILS, RUNOFF FROM CONSTRUCTION MATERIAL STORAGE, ANDSPILLAGE FROM CONSTRUCTION EQUIPMENT AND REFUELING SITES. CONTRACTOR SHALL CONTAIN ALLSEDIMENT BY PROPER EROSION CONTROL PRACTICES AS INDICATED IN THE STORM WATER POLLUTIONPREVENTION PLAN. CONTRACTOR SHALL CONTROL POLLUTION FROM MATERIAL STORAGE BY PROPERSTORAGE PROCEDURES. MATERIALS THAT ARE A POTENTIAL SOURCE OF POLLUTION SHALL BE STOREDIN CONTAINERS PROTECTED FROM ELEMENTS, OR IN THE JOB TRAILER. POLLUTION FROM REFUELINGSHALL BE PREVENTED BY PROPER REFUELING PRACTICES. PROPER CONTAINMENT AND CLEANUP SHALLBE EMPLOYED IF A SPILL OCCURS.DESCRIPTION OF POTENTIAL POLLUTANT SOURCES ASSOCIATED WITH CONSTRUCTIONACTIVITIESPRE-CONSTRUCTION ACTIONS(EVALUATION/PROTECTION OFIMPORTANT SITE CHARACTERISTICS)LAND CLEARING AND GRADING(CUTTING/FILLING/STOCKPILING, GRADING,DRAINS, SEDIMENT TRAPS, BARRIERS,DIVERSIONS, SURFACE ROUGHENING)BUILDING CONSTRUCTION (BUILDINGS, UTILITIES,PAVING)CONSTRUCTION PHASE (SPECIFIC ACTIVITIES OREROSION CONTROL PRACTICES)*SEQUENCE DESCRIBING STORMWATER QUALITY MEASURES IMPLEMENTATION RELATIVE TOLAND DISTURBING ACTIVITIES.STORMWATER POLLUTION PREVENTION PLAN -CONSTRUCTION COMPONENTCONSTRUCTION SEQUENCE SCHEDULE2.1.BEGIN MAJOR CLEARING AND GRADING AFTERINSTALLING THE KEY SEDIMENT AND RUNOFFMEASURES. CLEAR BORROW AND DISPOSAL AREASAS NEEDED. INSTALL ADDITIONAL CONTROLMEASURES AS GRADING PROGRESSES ANDAROUND STOCKPILED AREAS.INSTALL NECESSARY EROSION ANDSEDIMENT CONTROL PRACTICES AS WORKTAKES PLACE.BERFOR CONSTRUCTION, SCHEDULE APRECONSTRUCTION MEETING WITH THE TOWN OFCARMEL ENGINEER.BEFORE CONSTRUCTION, EVALUATE, MARK, ANDPROTECT IMPORTANT TREES AND ASSOCIATEDROOTING ZONES, UNIQUE AREAS (E.G. WETLANDS)TO BE PRESERVED, ON-SITE SEPTIC SYSTEMABSORPTION FIELDS, AND VEGETATION SUITABLEFOR FILTER STRIPS, ESPECIALLY IN PERIMETER AREAS.CONSTRUCTION OPERATIONSTHE PROPOSED PROJECT CONSISTS OF THE DEMOLITION OF A PORTION OF ANEXISTING BUILDING ON THE SITE AND THE CONSTRUCTION OF A NEW 5,950SQUARE FEET BUILDING. THE PROJECT IS LOCATED SOUTH OF MAIN STREET ONOLD MERIDIAN STREET. THE NEW ADDITION IS PART OF THE EXISTING STRIPMALL AND PARKING IS SHARED AMONG ALL USERS AND TENANTS. AS PART OFTHIS PROJECT, NO DRIVEWAYS WILL BE CLOSED. NO NEW DRIVEWAY CUTS WILLBE CONSTRUCTED AS PART OF THIS PROJECT. THE SITE IS LOCATED IN A PLACEOF PREVIOUS DEVELOPMENT AND AN EXISTING DETENTION FACILITY EXISTS ONTHE PROPERTY. THIS DRY DETENTION BASIN AND WETLAND ALSO ACTS AS ASTORMWATER QUALITY MEASURE. A NEW STRUCTURAL STORMWATER BMP ISBEING CONSTRUCTED AS PART OF THIS PROJECT. THIS ADDITIONAL BMPMEASURE WILL BRING THE SITE INTO COMPLIANCE PER CITY OF CARMELORDINANCE. DUE TO THE FACT THAT THE SITE IS ALREADY A FULLY DEVELOPEDSITE, THE PROJECT INCREASES GREEN SPACE AND REDUCES RUN-OFF LEAVINGTHE SITE. SINCE THE SITE IS ALREADY COVERED BY AN EXISTING DETENTIONSYSTEM AND THIS PROJECT DOES NOT INCREASE RUN-OFF, THE EXISTINGDETENTION SYSTEM WILL CONTINUE TO FUNCTION AND REGULATE THESTORMWATER QUANTITY LEAVING THE SITE.PROJECT NARRATIVE1. HYDROLOGIC UNIT CODE:05120201090030 COOL CREEK - GRASSY BRANCH/LITTLE COOL CREEK2. IDENTIFICATION OF ALL RECEIVING WATERS:EXISTING DETENTION POND/BASIN LOCATED SOUTH OF PROJECT IN SOUTHEAST CORNER OF BUILDINGLOT WHICH ULTIMATELY DISCHARGES INTO GRASSY BRANCH OF LITTLE COOL CREEK AND INTO COOLCREEK.3. ESTIMATE OF PEAK DISCHARGE FOR POST CONSTRUCTION CONDITIONS (10-YEAR):3.22 CFS4. LOCATIONS OF SPECIFIC POINTS WHERE STORMWATER DISCHARGE WILL LEAVE THE SITE:STORMWATER DRAINAGE FROM THE SITE WILL BE CONVEYED TO AN EXISTING STORM SYSTEM TO ANEXISTING DRY DETENTION BASIN. THIS BASIN DISCHARGE INTO THE GRASSY BRANCH OF LITTLE COOLCREEK.5. IDENTIFICATION OF ALL POTENTIAL DISCHARGES TO GROUNDWATER:NO NEW POTENTIAL DISCHARGES TO GROUNDWATER.6. SOILS MAP OF THE PREDOMINANT SOIL TYPES:REFER TO MAP AND SOIL DESCRIPTION ON SHEET C0-1.7. DESCRIPTION OF POTENTIAL POLLUTANT SOURCES ASSOCIATED WITH THE CONSTRUCTION ACTIVITIES:POTENTIAL POLLUTION SOURCES ASSOCIATED WITH CONSTRUCTION ACTIVITY INCLUDE:SEDIMENT IN RUNOFF FROM EXPOSED SOILS, RUNOFF FROM CONSTRUCTION MATERIAL STORAGE, ANDSPILLAGE FROM CONSTRUCTION EQUIPMENT AND REFUELING SITES. CONTRACTOR SHALL CONTAIN ALLSEDIMENT BY PROPER EROSION CONTROL PRACTICES AS INDICATED IN THE STORM WATER POLLUTIONPREVENTION PLAN. CONTRACTOR SHALL CONTROL POLLUTION FROM MATERIAL STORAGE BY PROPERSTORAGE PROCEDURES. MATERIALS THAT ARE A POTENTIAL SOURCE OF POLLUTION SHALL BE STOREDIN CONTAINERS PROTECTED FROM ELEMENTS, OR IN THE JOB TRAILER. POLLUTION FROM REFUELINGSHALL BE PREVENTED BY PROPER REFUELING PRACTICES. PROPER CONTAINMENT AND CLEANUP SHALLBE EMPLOYED IF A SPILL OCCURS.8. TEMPORARY AND PERMANENT STORMWATER QUALITY MEASURES:A. THE LOCATION OF ALL TEMPORARY STORMWATER QUALITY MEASURES CAN BE FOUND OF SHEETC4-1.B. THE DIMENSIONS OF ALL TEMPORARY STORMWATER QUALITY MEASURES CAN BE FOUND OF SHEETC4-1.C. DETAILED PREDICATIONS FOR ALL TEMPORARY STORMWATER QUALITY MEASURES CAN BE FOUNDON SHEET C4-2.D. CONSTRUCTION DETAILS FOR ALL TEMPORARY STORMWATER QUALITY MEASURES CAN BE FOUNDON SHEET C4-2.E. ALL PROPOSED POLLUTION PREVENTION MEASURES SHALL BE INSPECTED FOR DEFICIENCIES ON AWEEKLY BASIS AND WITHIN 24 HOURS OF ALL RAIN EVENTS.SILT FENCE: INSPECT SILT FENCE WEEKLY AND AFTER EACH STORM EVENT. IF FENCE FABRIC TEARS,STARTS TO DECOMPOSE, OR IN ANY WAY BECOMES INEFFECTIVE, REPLACE THE AFFECTED PORTIONIMMEDIATELY. REMOVE DEPOSITED SEDIMENT WHEN IT REACHES HALF THE HEIGHT OF THE FENCE ATITS LOWEST POINT OR IS CAUSING THE FABRIC TO BULGE. TAKE CARE TO AVOID UNDERMINING THEFENCE DURING CLEANOUT. AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED, REMOVETHE FENCE AND SEDIMENT DEPOSITS, BRING THE DISTURBED AREA TO GRADE AND STABILIZE.CATCH BASIN FILTER: INSPECT WEEKLY AND AFTER EACH STORM EVENT. REMOVE BUILT-UP SEDIMENTAND REPLACE THE GEOTEXTILE FABRIC AFTER EACH STORM EVENT. PERIODICALLY REMOVE SEDIMENTAND TRACKED ON SOIL FROM THE STREET (BUT NOT BY FLUSHING WITH WATER) TO REDUCE THESEDIMENT LOAD ON THIS CURB INLET PRACTICE.EROSION CONTROL BLANKETS: DURING VEGETATIVE ESTABLISHMENT, INSPECT AFTER STORM EVENTSFOR ANY EROSION BELOW THE BLANKET. IF ANY AREA SHOWS EROSION, PULL BACK THAT PORTION OFTHE BLANKET COVERING IT, ADD SOIL, RE-SEED THE AREA, RE-LAY AND STAPLE THE BLANKET. CHECKTHE TREATED AREAS PERIODICALLY.STONE CONSTRUCTION ENTRANCE: INSPECT ENTRANCE PAD AND SEDIMENT DISPOSAL AREA WEEKLYAND AFTER STORM EVENTS OR HEAVY USE. RESHAPE PAD AS NEEDED FOR DRAINAGE AND RUNOFFCONTROL. TOP DRESS WITH CLEAN STONE AS NEEDED. IMMEDIATELY REMOVE MUD AND SEDIMENTTRACKED OR WASHED ONTO PUBLIC ROADS BY BRUSHING OR SWEEPING. FLUSHING SHOULD ONLY BEUSED IF THE WATER IS CONVEYED INTO A SEDIMENT TRAP OR BASIN. REPAIR ANY BROKEN ROADPAVEMENT IMMEDIATELY.CONCRETE WASHOUT: INSPECT DAILY FOR DAMAGE. REPAIR ANY DAMAGE IMMEDIATELY. MAINTAIN12" MINIMUM FREEBOARD. CLEAN OR CONSTRUCT NEW WASHOUT ONCE EXISTING WASHOUT IS 75%FULL.9. GENERAL CONSTRUCTION SEQUENCE:REFER TO THE CONSTRUCTION SEQUENCE SCHEDULE PROVIDED IN A TABLE ON THIS SHEET.10. LOCATION OF PROPOSED SOIL STOCKPILES, BORROW, AND/OR DISPOSAL AREAS:THERE SHALL BE NO PROPOSED SOIL STOCKPILES, BORROW AND/OR DISPOSAL AREAS ON THIS SITE.11. TEMPORARY AND PERMANENT SURFACE STABILIZATION METHODS APPROPRIATE FOR EACH SEASON.ALL UNPAVED AREAS NOTED SHALL BE SODDED OR MULCHED IN ACCORDANCE WITH SODDING ANDPLANTING SPECIFICATIONS.12. EROSION AND SEDIMENT CONTROL SPECIFICATION FOR INDIVIDUAL BUILDING LOTS:THE SITE WILL NOT BE SUBDIVIDE; THEREFORE, THERE ARE NO INDIVIDUAL LOTS ON THE PROPERTY.REFER TO SHEET C5-1 FOR PROPOSED SITE IMPROVEMENTS.13. MATERIALS HANDLING, STORAGE, AND SPILL PREVENTION PLAN:REFER TO THE CONSTRUCTION SEQUENCE SCHEDULE PROVIDED IN A TABLE ON THIS SHEET.14. CONTACT INFORMATION FOR THE TRAINED INDIVIDUAL RESPONSIBLE FOR STORMWATER POLLUTIONPREVENTION FOR THE PROJECT SITE.CONTRACTOR NAME TO BE DETERMINED.15. CURRENT REVISION DATE ON ALL SHEETS:ONCE FINAL APPROVAL OF THE PROJECT IS RECEIVED FROM THE CITY OF CARMEL, ALL REVISIONS SHALLBE APPROVED BY THE CITY OF CARMEL, AND REVISION NOTES STATING THE REVISION NUMBER, DATEAND REVISION SHALL BE PLACED ON THE APPROPRIATE PLAN SHEETS OF THE TITLEBLOCK.STORMWATER POLLUTION PLAN (SWPPP) FOR CONSTRUCTION SITES1. POTENTIAL POLLUTANT SOURCES ASSOCIATED WITH THE PROPOSED LAND USE:POTENTIAL POST CONSTRUCTION POLLUTANTS TO INCLUDE FUEL AND OIL FROM VEHICLES AND TRASHFROM PARKING LOT USERS.2. POST-CONSTRUCTION STORMWATER QUALITY MEASURES:1 NEW STRUCTURAL BMP (AQUASWIRL AS-4)LOCATION: REFER TO SHEET C3-1DIMENSIONS: REFER TO SHEET C3-1.SIZING CALCULATIONS: REFER TO DRAINAGE REPORTDETAILED SPECIFICATIONS: REFER TO DRAINAGE REPORTCONSTRUCTION DETAILS: REFER TO SHEETS C2-51 EXISTING DETENTION BASIN AND WATER QUALITY BASINLOCATION: REFER TO SHEET C4-1 AND C3-1DIMENSIONS: REFER TO SURVEY SHEETSIZING CALCULATIONS: REFER TO DRAINAGE REPORT3. SEQUENCE DESCRIBING STORMWATER QUALITY MEASURE IMPLEMENTATION:THE STRUCTURAL BMP IS INSTALLED BEFORE STORM SEWER SYSTEM IS FUNCTIONAL. THE EXISTINGWATER QUALITY BASIN REMAINS ACTIVE THROUGHOUT CONSTRUCTION. EROSION CONTROL MEASURESPREVENT POLLUTION ENTERING SYSTEM. AFTER FINAL STABILIZATION, CONTRACTOR TO CLEAN STORMSYSTEM, AQUASWIRL UNIT OF ALL DEBRIS. REFER TO SPECIFICATIONS AND OPERATION ANDMAINTENANCE MANUAL FOR ADDITIONAL REQUIREMENTS.4. STORMWATER QUALITY MEASURES TO BE IMPLEMENTED TO PREVENT OR MINIMIZE ADVERSE IMPACTSTO STREAM AND RIPARIAN HABITATS:THE RUN-OFF OF THE SITE IS BEING REDUCED AND IS CURRENTLY ROUTED TO THE DETENTION BASINTHAT HANDLES WATER QUANTITY MEASURES. THE DETENTION BASIN CURRENTLY ACTS AS THE ONLYSTORMWATER QUALITY MEAURE ON THE SITE, WITH THE ADDITION OF AN ADDITIONAL STORMWATERQUALITY MEASURE, IT WILL FURTHER HELP MITIGATE POTENTIAL ADVERSE IMPACTS TO DOWNSTREAMSTORM SYSTEMS BY FILTERING OUT HARMFUL POLLUTANTS FROM STORMWATER RUNOFF.5. AN OPERATIONS AND MAINTENANCE MANUAL FOR ALL POST-CONSTRUCTION STORMWATER QUALITYMEASURE:STORMWATER QUALITY INFRASTRUCTURE, ALONG WITH DETAILS AND PROCEDURES FOR MAINTAINGTHE ENTIRE STORMWATER SYSTEM IS INCLUDED IN THE OPERATIONS AND MAINTENANCE MANUALCREATED FOR THIS PROJECT.STORMWATER POLLUTION PLAN (SWPPP)FOR POST-CONSTRUCTION SITES