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REGULATIONS, PERMITS & ORDINANCESCHECKLISTMEETINGSC-SWPPP AND ON-SITE SWPPPBMPS PER THE CGPCONSTRUCTION PLANSENGINEERING REPORT

REGULATIONS, PERMITS AND ORDINANCES ARE THEFOUNDATION FOR STORMWATER PLAN REVIEW.

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STANDARDS FOR STORMWATER MANAGEMENTAND SEDIMENT REDUCTION (Reg. 72-300 – 316)EFFECTIVE JUNE 28, 2002.

NPDES GENERAL PERMIT FOR STORMWATERDISCHARGES FROM CONSTRUCTION ACTIVITIES,(CGP) EFFECTIVE JANUARY 1, 2013.

STATE OF SC NPDES GENERAL PERMIT FORSTORMWATER DISCHARGES FROM REGULATEDSMALL MUNICIPAL SEPARATE STORM SEWERSYSTEMS (SMS4) EFFECTIVE JANUARY 1, 2014.

DETENTION STRUCTURE – PERMANENTSTORMWATER STRUCTURE CONTROLINGRELEASE RATE

RETENTION STRUCTURE – PERMANENTSTORMWATER STRUCTURE STORING A VOLUMEOF STORMWATER RUNOFF. RELEASE ISTHROUGH INFILTRATION OR EVAPORATION.

QUANTITATIVE CONTROL – A SYSTEM OFVEGETATIVE OR STRUCTURAL MEASURES, ORBOTH THAT CONTROL THE INCREASED VOLUMEAND RATE OF STORMWATER RUNOFF.

QUALITATIVE CONTROL – A SYSTEM OFVEGETATIVE, STRUCTURAL OR OTHERMEASURES THAT REDUCE OR ELIMINATEPOLLUTANTS.

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ADVERSE IMPACT MEANS A SIGNIFICANTNEGATIVE IMPACT TO:

LAND,WATER ANDASSOCIATED RESOURCES

RESULTING FROM A LAND DISTURBING ACTIVITY.

THE NEGATIVE IMPACT INCLUDES:

INCREASED RISK OF FLOODINGDEGRADATION OF WATER QUALITYINCREASED SEDIMENTATIONREDUCED GROUNDWATER RECHARGENEGATIVE IMPACTS ON AQUATIC ORGANISMSNEGATIVE IMPACTS ON WILDLIFE AND OTHERRESOURCES; ANDTHREATENED PUBLIC HEALTH.

PROJECT WILL HAVE NO SIGNIFICANT ADVERSEIMPACT ON THE RECEIVING NATURALWATERWAY OR DOWNSTREAM PROPERTIES; OR

THE IMPOSITION OF PEAK RUNOFFREQUIREMENTS FOR RATES OF STORMWATERRUNOFF WOULD AGGRAVATE DOWNSTREAMFLOODING.

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72-307 C (4) – DETENTION REQUIREMENTS (2AND 10 YR 24 HOUR)

72-307 C (4) - NON-EROSIVE VELOCITYREQUIREMENTS (10 YR 24 HOUR)

72-307 C (5) - 80% SEDIMENT TRAPPINGEFFICIENCY (10 YR 24 HOUR)

72-307 C (5) – INFILTRATION PRACTICES MUSTACCEPT 1ST INCH FROM ALL IMPERVIOUSAREAS.

72-307 C (11) – INFILTRATION PRACTICES – 10ADDITIONAL REQUIREMENTS.

72-307 D – VECTOR CONTROL DESIGN CRITERIA.

72-307 C (5) – PERMANENT WATER QUALITYPONDS WITH A PERMANENT POOL – MUSTSTORE AND RELEASE THE FIRST ½ INCH OVER 24HRS. THIS IS FROM THE ENTIRE SITE.

72-307 C (5) – PERMANENT WATER QUALITYPONDS WITHOUT A PERMANENT POOL MUSTRELEASE THE FIRST INCH OVER 24 HOURS.

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SWP3 MUST COMPLY WITH TECHNICALREQUIREMENTS OF CGP.

SWP3 MUST INCLUDE RATIONALE FORCONTROL MEASURES – HOW THEY PROTECT AWATERWAY OR CONVEYANCE.

SWP3 MUST DEMONSTRATE THATSTORMWATER DISCHARGES WILL NEITHERCAUSE NOR CONTRIBUTE TO WATER QUALITYVIOLATIONS.

CONSTRUCTION PROJECTS 25 ACRES ORGREATER IN TMDL OR 303D WATERSHED MUSTHAVE A WRITTEN QUANTITATIVE ANDQUALITATIVE ASSESSMENT SHOWING THATSELECTED BMP WILL CONTROL THE DISCHARGEOF POLLUTANTS OF CONCERN FORCONSTRUCTION AND POST-CONSTRUCTIONDISCHARGES.

PROJECTS DISTURBING 1 ACRE (+LCP) OR MOREMUST DESIGN, INSTALL, IMPLEMENT, ANDMAINTAIN STORMWATER CONTROL MEASURESTHAT APPROXIMATE PREDEVELOPMENTCONDITIONS TO THE MEP AND PROTECT WATERQUALITY.

NEW DEVELOPMENT STANDARDS TO BE USEDCAN BE A VARIETY OF CONTROL MEASURES,BUT THE FIRST INCH OF RUNOFF MUST BEADDRESSED.

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RETENTION OF A MINIMUM STORM VOLUMEEX. 1ST INCH.

RETENTION OF A MINIMUM STORM SIZE EX.95TH PERCENTILE RAINFALL EVENT.

HYDROLOGIC ANALYSIS – POST RATE, VOLUME,DURATION AND TEMPERATURE OF DISCHARGESDOES NOT EXCEED THE PREDEV. RATES ANDHYDROGRAPH FOR THE 1,2,10,25,50 AND 100YEAR STORMS.

GROUNDWATER RECHARGE – INFILTRATE THEINCREASE IN STORMWATER VOLUME FROM PRETO POST FOR THE 2 YR. STORM EVENT.

HYDROLOGIC LOADING CALCULATIONS – POSTCONSTRUCTION ANNUAL POLLUTANT LOADSARE NOT ALLOWED TO EXCEEDPREDEVELOPMENT LEVELS.

4.1.3.1 SMS4 PERMIT – REQUIRES ANORDINANCE OR OTHER REGULATORYMECHANISM PROVIDING LEGAL AUTHORITY TOIMPLEMENT THE SMS4 PERMIT.

CITY OF GREER HAS THREE STORMWATERORDINANCES – STORMWATER MANAGEMENT,ILLICIT DISCHARGE AND MAINTENANCE ANDREPAIR of STORMWATER MANAGEMENTSYSTEMS AND WATER QUALITY DEVICES.

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GREER USED THENEW DHECCHECKLIST ANDINSERTEDADDITIONAL CITYREQUIREMENTS.

PLANNING ADVISORY COMMITTEE – CITY STAFF,UTILITIES, SCDOT, ETC.

PRELIMINARY MEETING – OPTIONAL

PRE-SUBMITTAL MEETING – CHECK SUBMITTALFOR COMPLETENESS AND PARTIAL REVIEW

THIS MEETING IS FOR PROJECTS WHERESOMETHING WILL BE BUILT.

APPLICANT SUBMITS A CONCEPTUAL DESIGN ATTHIS MEETING.

APPLICANT RECIEVES COMMENTS FROMPLANNING AND ZONING, FIRE MARSHALL,BUILDING CODES, UTILITIES, SCHOOL DISTRICT,PUBLIC SERVICES, SCDOT, ETC.

STORMWATER REVIEWS ON GIS OR GOES TOSITE OR BOTH.

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CHECKLIST AND PLAN REVIEW INVOICE

SUMMARY OF DESIGN AND SUBMITTALREQUIREMENTS SUCH AS DETENTION,PHASING, SKIMMER BASINS, BUFFERS, ONSITESWPPP, ETC.

DESIGN SOFTWARE PREFERENCES ANDSOFTWARE NOT ACCEPTED.

RAINFALL RETURN PERIOD VALUES

BRIEF COMMENTS OR QUESTIONS ONSITUATIONS UNIQUE TO SITE. EX. OFFSITESTORMWATER, BUFFERS, WOS, DISCHARGEPOINT, ETC.

IF SITE HAS SOME CHALLENGES (EX. DISCHARGEPOINT) MAY HAVE A PRELIMINARY MEETINGWITH DESIGN ENGINEER.

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RESTRICTS NEW POINT DISCHARGES ONTOADJACENT PROPERTY WHERE THERE WAS NOPREVIOUS DISCHARGE POINT, UNLESS WRITTENPERMISSION FROM ADJACENT PROPERTYOWNER IS PROVIDED.RECOMMENDS A 20 FT. BUFFER BETWEENPROPERTY LINE AND DISCHARGE POINT.PLUNGE POOLS, LEVEL SPREADERS, ETC. MUSTBE PROVIDED WHEN THE NEW OUTLET IS NEARTHE PROPERTY LINE AND NOT DIRECTED TO ANEXISTING OUTFALL LIKE A CREEK OR DITCH.NO DISCHARGE ON FILL SLOPES.

SOUTH CAROLINA DRAINAGE LAW USES WATERAS THE COMMON ENEMY RULE.THIS MEANS WATER IS A COMMON ENEMY TOALL UNLESS YOU CONCENTRATE IT. THEN ITBECOMES A LIABILITY TO THE ONE THATCONCENTRATES IT.

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DESIGN ENGINEER BRINGS PLANS,CALCULATIONS, NOI AND ONSITE SWPPP TOMEETING.

PLANS - REVIEW OF TITLE PAGE, STANDARDNOTES, EXISTING CONDITIONS, DEMOLITIONPLAN, AND EROSION CONTROLS.

PLANS - WOS/WETLAND DELINEATIONS,BUFFERS, BUFFER REDUCTIONS, SURFACEWITHDRAWAL. DISCUSS SURFACE WATERPROTECTION PLAN

PLANS – BAFFLES AND FOREBAYS, DETAILS,(INLET PROTECTION, ETC.)

CALCULATIONS – REVIEW OF CN, TC, DA MAPS,RAINFALL RETURN PERIOD VALUES, AND PONDDATA REPORT.

CALCULATIONS (? PRESENT) – REVIEW OFWATER QUALITY CALCULATIONS, SKIMMERSIZING, SEDIMENT TRAPPING EFFICIENCY,OUTLET PROTECTION SIZING, BUOYANCY, ETC.

CHECK AGAINST

POND DETAILS.

PONDDATAREPORT

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CHECK ALLTHAT APPLY.

EIN NUMBER

LCP

NOI

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FLOODINGPROBLEMS

DETENTIONWAIVER

WETLANDS/WOS

NAVIGABLEWATERS

NOI

Form asks fornearest WQMS.

303 D informationfrom 303 D List.

TMDL informationfrom TMDL

Don’t miss D 1 (f)and 2 (f).

Sec. 122.22 Reg 61-9

NOI

SUBMITTAL IS CHECKED FOR COMPLETENESS.

IT STREAMLINES THE PLAN REVIEW PROCESS.

IF COMPLETE CAN GO TO A CONSULTANT FOR REVIEW.

SMALL AND LINEAR PROJECTS CAN COMPLETE REVIEW.

PROJECT ISSUES CAN BE RESOLVED IN MEETING.

PUBLIC EDUCATION - ENGINEER CAN LEARN SOMEPERMIT REQUIREMENTS.

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COMPREHENSIVE SWPPP = ON-SITESWPPP + PLANS + ENGINEERING REPORT

ON-SITE SWPPP = COMPREHENSIVESWPPP – ENGINEERING REPORT

TOPOGRAPHICSOILSVICINITYFLOODWAYDRAINAGE AREA – (PRE AND POST)ADDITIONAL DRAINAGE AREA – (WATERQUALITY AND QUANTITY)

PROJECT DESCRIPTION, (SUBDIVISION, MFG.PLANT, ETC.)PRIOR USES OF SITE (POTENTIAL POLLUTIONSOURCES)DESCRIPTION OF PRE AND POST DEVELOPEDCONDITIONSEXISTING AND POTENTIAL FLOODINGPROBLEMSDISTURBED AREANEED FOR CONCRETE OR ASPHALT BATCHPLANTS.

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DRAINAGE AREAS AND ANY OFFSITE SW

SEDIMENT TRAPPING

POST-CONSTRUCTION WATER QUALITY

STORM SEWER SYSTEM

100 YEAR STORM?

QUANTITATIVE/QUALITATIVE ASSESSMENT(3.2.12 B II)

3.2.2 CGP - SW MGT AND SEDIMENT CONTROL

3.2.3 CGP - CONST. SEQUENCE

3.2.4 CGP - WOS/WETLANDS, BUFFERS, BUFFERREDUCTIONS AND MAINTENANCE

3.2.5 CGP - SOURCES OF POLLUTION

3.2.10 CGP A and B – VOLUME and VELOCITYCONTROL, DISCHARGE CONTROL, STEEPSLOPES, SOIL STABILIZATION, ETC.

3.2.10 D AND E CGP – POLLUTANT DISCHARGEMINIMIZATION AND PROHIBITED DISCHARGES

3.2.11 CGP – MGT. OF NON-STORMWATERDISCHARGES

3.2.12 A CGP – TMDLS AND PERMIT ELIGIBILITY

3.2.12 B I – BMP SELECTION ADDRESS INNARRATIVE

3.2.12 B II – QUANTITATIVE/QUALITATIVEASSESSMENT (ADDRESS IN NARRATIVE)

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CHECK THESE ITEMS:

HAVE REQUIRED SUBJECTS BEEN ADDRESSED?

DOES ON-SITE SWPPP DISCUSSION MATCHTHEIR SITE?

POTENTIAL POLLUTANT SOURCES TABLE

INSPECTION REQUIREMENTS AND LOGS

DESIGN PROFESSIONAL CERTIFICATION

C-SWPPP MUST ADDRESS USE, INSTALLATION,MAINTENANCE AND INSPECTION OF BMPS

EROSION PREVENTION – EX. STABILIZATIONSEDIMENT CONTROL – INLET & OUTLETPROTECTION, SEDIMENT BASINS, TRAPS ANDSURFACE DEWATERINGRUNOFF CONVEYANCE – PERM AND TEMPCHANNELS (10 YR STORM AND 7 DAYSTABILIZATION), VELOCITY DISSIPATION DEVICESPOST-CONSTRUCTION WATER QUALITY BMPSSTRUCTURAL BMPS, ETC.

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CITY OF GREER USES SCDHEC BMP DETAILSWHERE AVAILABLE

HAVE INSTALLATION & MAINTENANCEINSTRUCTIONS

ENGINEERS SHOULD BE FAMILIAR WITH THEM

SHOULD PASS DHEC AUDIT

REDUCED REVIEW TIME

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RIPRAPAPRON

TABLE

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LIMITS OF DISTURBANCE – ALL PLAN SHEETS

BMPS IDENTIFIED – BMP MANUAL SYMBOLS ORLEGEND

CONSTRUCTION SEQUENCE (PHASED)

GRADING AND DRAINAGE PLANS

BMP DETAIL SHEETS

EROSION CONTROL SHEETS

5 TO < 10 ACRES

INITIAL LAND DISTURBANCE PHASE

STABILIZATION PHASE

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10 ACRES OR MORE

INITIAL LAND DISTURBANCE PHASE

CONSTRUCTION PHASE

STABILIZATION PHASE

CN ANALYSIS

PRE AND POST HYDROLOGIC ANALYSIS (TOTALAREA DOES NOT CHANGE FROM PRE TO POST)

PERMANENT WATER QUALITY ANALYSIS

SEDIMENTOLOGY (TRAPPING EFFICIENCY)ANALYSIS

STABLE CHANNEL ANALYSIS (TEMP AND PERM.)

AS-BUILT SURVEY (FOR PREVIOUS STRUCTURE)

STORM SEWER ANALYSIS

RIPRAP APRON ANALYSIS

DETENTION ANALYSIS

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DETENTION ANALYSIS

FULL POND ROUTING

STAGE-STORAGE-DISCHARGE RELATIONSHIP,

SUMMARY TABLE OF MAXIMUM WSE INDETENTION STRUCTURE

SUMMARY TABLE OF DISCHARGE VELOCITIESAND PEAK INFLOWS AND OUTFLOWS FOR EACHOUTFALL.

CN – PREDEVELOPMENT = EXISTING; USETABLES OR WEIGHTED CN

TC – FLOW PATHS, LENGTH OF SHEET FLOW,MANNING’S N, PAVED/UNPAVED, TOTALLENGTH

DA MAPS – CHECK FOR OFFSITE STORMWATER;SHOULD HAVE THREE MAPS

DETENTION ANALYSIS – MAKE A TABLE

DETENTION ANALYSIS TABLES – COMPARE PRETO POST DEVELOPMENT

HYD # WSNAME

ACRES CN TC 2 YRWSE

10 YRWSE

25 YRWSE

100 YRWSE

INFLOWHYD?

RAIN-FALL

RAIN-FALL

RAIN-FALL

RAIN-FALL

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CHECK AGAINST

POND DETAILS ONPLAN SHEETS .

CITY OFGREERREVIEW -PONDDATAREPORT

STABLE CHANNEL ANALYSISAT LEAST 10 YR STORM

SHOW CALCULATION OF Q

PLAN DETAILS MUST MATCH CALCULATION

MULTIPLE CHANNELS – PROVIDE TABLE WITHDIMENSIONS ON PLANS

LABELING CONSISTENCY ON PLAN SHEETS,DETAILS AND CALCULATIONS.

PERMANENT WATER QUALITY ANALYSIS

CHECK DRAINAGE AREA

DRY POND – 1ST INCH RELEASED OVER 24 HRS

MFG. DEVICE – RESEARCH MFG. INFO, SCDOT,OR INFORMATION FROM OTHER MS4S.

RIPRAP APRON ANALYSIS

CHECK CALCULATIONS AGAINST PLAN DETAILS

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STORM SEWER ANALYSIS

REG 72-307 C (2) – RATIONAL METHOD OKAYFOR INDIVIDUAL CULVERTS OR STORM DRAINSTHAT ARE NOT PART OF A NETWORK

PREFER HYDRAFLOW STORM SEWER REPORT

READ PROFILES – CHECK FOR SURCHARGING

MUST HAVE LEGEND – STORM EVENT, HGL, EGL

STORM SEWER ANALYSIS

NARRATIVE SHOULD HAVE DISCUSSED EVENTSTHAT ARE PIPED AND LOCATION OF THE 100 YRSTORM EVENT.

SEDIMENTOLOGY

SILT FENCE TRAPPING EFFICIENCY – SEDCAD ORLESS THAN 0.25 DA PER 100 LINEAR FT. OF SF.

SEDIMENT BASINS – TYPICALLY DONE INSEDCAD

OTHER BMPS – USE DESIGN AIDS

SKIMMER SIZING

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CITY OF GREERREVIEW - SKIMMERSIZING

SUBMIT CUT SHEETS

IF CHANGINGORIFICE SHOWCALCULATIONS

SEDIMENTOLOGY - SEDCAD

CHECK RAINFALL AND SOILS

STRUCTURE NETWORKING – BMPS?

CONTRIBUTING AREAS – CHECK AGAINST MAP

CN AND TC – CHECK AGAINST CONDITIONS

STRUCTURE DETAIL – CHECK AGAINST PLANDETAIL

CITY OF GREERREVIEW - SEDCADSTRUCTUREDETAIL –

CHECKDIMENSIONS ANDELEVATIONSAGAINST PLANDETAILS DURINGCONSTRUCTION.

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CITY OF GREERREVIEW -DISCHARGE TABLE

CHECK USER INPUTFLOWS FROMSKIMMER SIZING

AND

ELEVATIONSOF DROP INLETAND EMERGENCYSPILLWAY

CITY OF GREERREVIEW - SEDCAD –SUBWATERSHEDDETAIL TABLES

CHECK CN AND TC

QUANTITATIVE/QUALITATIVE ASSESSMENT

CONSTRUCTION – TRAPPING EFFICIENCY,DETENTION AND VELOCITY DISSIPATION

POST-CONSTRUCTION – DETENTION ANDVELOCITY DISSIPATION, POST-CONSTRUCTIONWATER QUALITY EFFICIENCY (MAY USE IDEALOR TABLES)

MAY REQUIRE TREATMENT TRAIN

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KNOW REGULATIONS

HAVE A CHECKLIST

MEET WITH DESIGN PROFESSIONAL EARLY INPROCESS

IDENTIFY PEOPLE YOU CAN ASK QUESTIONS

HAVE A PLAN REVIEW CONSULTANT ONRETAINER; LARGE PROJECTS – ASSEMBLE APLAN REVIEW TEAM