TABLE OF CONTENTS SMALL MS4 STORM WATER MANAGEMENT PROGRAM PREFACE SWMP Overview ...................................................................................iv Regulatory Requirement ...............................................................iv Minimum Control Measures ............................................................v Definitions .................................. .................................................x Document Organization ........................................................................ xii Implementation Plan to Prepare for Permitting ........................................xiii MODEL PHASE II STORM WATER MANAGEMENT PROGRAM PART I MOOEL SWMP MUNICIPALITY BACKGROUND PART II MODEL SWMP MINIMUM CONTROL MEASURES 1 Public Education and Outreach .....................................................................5 Regulatory Requirement ......................................................................... 5 Current Projects ....................................................................................5 Selected BMPs Public Education and Outreach ...........................................5 2 Public Involvement in Storm Water Management Program Development............8 Regulatory Requirement .........................................................................8 Current Projects ....................................................................................8 Selected BMPs PubliC Involvement ...........................................................8 3 Illicit Discharge Detection and Elimination .................................................... 11 Regulatory Requirement .......................................................................11 Current Projects ..................................................................................11 Selected BMPs Illicit Discharge Detection and Elimination .......................... 11 4 Construction Site Storm Water Controls ......................................................15 Regulatory Requirement .......................................................................15 Current Projects ..................................................................................15 Selected BMPs Construction Site Storm Water Controls ............................. 15 5 Post Construction Storm Water Management for New Development! Redevelopment ........................................................................................19 Regulatory Requirement Selected BMPs Post Construction Storm Water Management for New ......................................................................19 Current Projects .................................. ...............................................19 Development/Redevelopment...............................................................19 TurnerCollie(0Braden Inc. 6 Pollution Prevention/Good Housekeeping for Municipal Operations .....••........... 22 Regulatory Requirement ......................................................................22 Current Projects .................................................................................22 Selected BMPs for Municipal Operations .................................................22 APPENDICES APPENDIX I APPENDIX II APPENDIX III APPENDIX IV APPENDIX V APPENDIX VI APPENDIX VII APPENDIX VIII APPENDIX IX Public Education and Outreach BMPs Public Involvement in Storm Water Management Program Development BMPs Illicit Discharge Detection and Elimination BMPs Construction Site Storm Water Controls BMPs Post Construction Storm Water Management for New Development /Redevelopment BMPs Pollution Prevention /Good Housekeeping for Municipal Operations BMPs Example SWMP -Pearland Regulations Other Implementation tracking fonms TurnerCollie@Bladenlnc. 1I CORRELATION OF SECTION!APPENDICES Section 1 Public Education and Outreach Appendix I Public Education and Outreach BMPs Section 2 Public Involvement in Storm Water Management Program Development Appendix II Public Involvement in Storm Water Management Program Development BMPs Section 3 Illicit Discharge Detection and Elimination , Appendix III Illicit Discharge Detection and Elimination BMPs Section 4 Construction Site Storm Water Controls Appendix IV Construction Site Storm Water Controls BMPs Section 5 Post Construction Storm Water Management for New Development/Redevelopment Appendix V -Post Construction Storm Water Management for New Development/Redevelopment BMPs Section 6 Pollution Prevention/Good Housekeeping for Municipal Operations Appendix VI Pollution Prevention/Good Housekeeping for Municipal Operations BMPs TumerCollie©'BtadenInc. iii ) PREFACE SWMP Overview Regulatory Requirement Phase I of the u.s. Environmental Protection Agency's (EPA) municipal storm water program was promulgated in 1990 under the authority of the Clean Water Act (CWA). Phase I relied on the National Pollutant Discharge Elimination System (NPDES) permit coverage to address storm water runoff from medium and large municipal separate storm sewer systems (MS4s), serving populations of 100,000 or greater. The Storm Water Phase II Final Rule (promulgated December 8, 1999) was the next step in the EPA's efforts to preserve, protect, and improve the nation's water resources from polluted storm water runoff. The Phase II program requires additional operators (small MS4s in urbanized areas) to implement programs and practices to control polluted storm water runoff, through the NPDES permit program. The program requires Phase II municipalities to develop a Storm Water Management Program. The purpose of this document is to present a model Storm Water Management Program that can be used as guidance by Phase II municipalities to develop the required programs. TurnerCollie(0'&ad enInc. IV Minimum Control Measures To meet the federal regulations, a municipality's Storm Water Management Program must provide minimum control measures for the following subject areas. Public Education and Outreach On Storm Water Impacts Public education and outreach is a major key to the success of a storm water management program. Through public education, people will gain an understanding of how their actions can affect storm water quality and become more informed about storm water quality issues in their community. MS4s will start to gain more support for their management programs both politically and financially as the public awareness grows. Public education is also able to perpetuate itself. As an individual becomes more informed about a topic of concern, they will inform others in their community. This aids the municipalities' efforts to educate the public, thus making resources available for other tasks. Also, when the public is aware of the impacts that they have on their surroundings, they gain a sense of responsibility for those actions. This can lead to greater compliance for the storm water management program. When the public makes an effort to comply with the management program, the program will have a greater positive effect more quickly. Many public education methods are available. Some examples of methods that are used include: • Distributing brochures or fact sheets • Sponsoring speaking engagements before community groups • Providing public service announcements • Implementing educational programs targeted at school age children • Conducting community-based projects such as storm drain stenciling, and watershed and beach cleanups MS4s are also able to utilize storm water education information available through the state, tribe, EPA, or other organizations in their education program. The public education program should target several different areas. First, individuals and households should be educated on how to maintain their homes in an environmentally friendly manner. This includes proper fertilizer, herbicide, and pesticide use; proper waste disposal; and proper septic system maintenance. The program should also inform the public on how to get involved in restoration activities and other conservation groups. Finally, the program should target commercial, industrial, and institutional groups, which may have business activities that could cause a significant impact to the storm water quality of the MS4. TurnerCollie0'Braden Inc. v The SWMP objectives should be: • Inform individuals and homeowners of steps they can take to improve storm water quality. • Educate commercial, industrial, and institutional groups about the impacts of their work on the storm water quality and the steps needed to reduce these effects. • Address the viewpoints of ali economic and ethnic groups in the design of the education program. Public Involvement/Participation Public involvement/participation is important for the development of the storm water management program. By encouraging input from all economic and cultural groups, there can be beneficial impacts to the development of the program. One such benefit is that early and frequent public input can lead to a shorter implementation schedule and greater support for the program. As with public education, people who take an active roll in the development of the program also feel a sense of responsibility for the program's success. For this reason, people may be less likely to challenge the MS4's program, which can lead to delays and hinder the program's success. Finally, with a larger number of people involved in the development of the program, there are more opportunities to gain expertise from these individuals and cooperation with other programs or governments in that watershed. These added resources can improve the success of the program. Members of the community can get involved in several ways. Possibilities for participation include serving as citizen representatives on a local storm water management panel, attending public hearings, working as citizen volunteers to educate other individuals about the program, assisting in program coordination with other pre-existing programs, or participating in volunteer monitoring efforts. The objectives should be: • Include the public in the development, implementation, and review of the storm water management program. • Include input from all economic and cultural groups. Illicit Discharge Detection and Elimination The illicit discharge detection and elimination minimum control measure is intended to reduce improper waste and management practices. A study by the Nationwide Urban Runoff Program (NURP) found that a little less than half of the water that is discharged from a MS4 during dry weather conditions was not directly related to storm water runoff. These dry weather discharges were found to have pollutant levels high enough to Significantly impact the water quality of the receiving water TurnerCollie@'Bradenlnc. vi bodies. It is believed that most of the flow during dry weather conditions is due to illicit and/or inappropriate discharges and connections to the MS4 such as mistaken or deliberate connections of wastewater lines to the MS4. The MS4 may also receive the illicit discharge through an indirect connection such as infiltration into the MS4 or spills flowing into storm drains. There are four parts to this minimum control measure. The first part is to develop an MS4 map that identifies all outfalls and the name and location of all waters of the United States that receive the discharge from the outfalls. The second part of the illicit discharge and elimination control measure is to prohibit the discharge of nonstorm water discharges to the MS4 through regulatory avenues and to develop a means to enforce these regulations. The third part is to execute a plan to detect and address non-storm water discharges. Dry weather screening is one method for localizing illicit discharges in MS4s. Finally, the public should be be educated about the hazards of improper waste disposal and non-storm water discharges. The educational component may include storm drain stenciling; a program to promote, publicize, and facilitate public reporting of illicit connections or discharges; and distribution of outreach materials. The objectives should be: • Develop procedures to locate areas suspected of having illicit discharges. • Develop procedures to track down the source of an illicit discharge. • Develop procedures to remove the illicit discharge. • Develop procedures to evaluate the programs performance. Construction Site Storm Water Runoff Control Construction site storm water runoff control is a minimum control measure designed to address the pollution of storm water runoff from construction sites. Activities that are performed on construction sites usually disturb a large amount of land and generate large amounts of waste. This has been found to lead to high levels of sediment, phosphorus, nitrogen, pesticides, petroleum derivatives, construction chemicals, and solid wastes in receiving streams. Several actions must be taken under this minimum control measure to deal with these pollutants. First, construction sites must be required through regulations or ordinances, to establish erosion and sediment controls. A mechanism to enforce compliance must also be established with the regulation or ordinance to ensure that the necessary controls are implemented. This may include non-monetary penalties, fines, bonding reqUirements, and permit denials. Next, the MS4 must establish the necessary requirements for erosion and sediment control Best Management Practices (BMPs) and methods to control waste such as discarded building materials, concrete truck washout, chemicals, litter, and sanitary waste. This will serve as guidance for construction site operators to establish control measures appropriate to their activities and size. Finally, the MS4 must establish procedures for site plan TurnerCollie0Braden Inc. vii review, receipt and consideration of public input, and inspection and enforcement of controls. The objectives should be: • Develop erosion and sediment control and waste control requirements for construction sites. • Develop procedures for site plan review to ensure consistency with local erosion and sediment control requirements. • Develop procedures for receipt and consideration of public input. • Develop procedures for inspection and enforcement to include identification of priority sites based of characteristics such as nature of the construction activities, topography, and the characteristics of soils and receiving water quality. Post-Construction Storm Water Management In New Development and Redevelopment Post-construction storm water management in new development and redevelopment focuses on implementation of controls that will try to maintain good water quality conditions after an area has been developed or after construction. This minimum control includes three parts. First, the MS4s are required to develop and implement structural and non-structural BMPs. Many studies have shown that it is much easier and more cost-effective to control pollution at its source rather than after it enters into an MS4. For this reason it is important to consider BMPs that may be needed for post-construction pollution control prior to the construction of an area. Minimization of impervious areas, wetland protection, and vegetated drainage ways are some of the controls that may be considered for use during the design of a new development or redevelopment project. The BMPs that are chosen should be appropriate for the community that it is to serve, minimize water quality impacts, and try to maintain pre-development runoff conditions. Second, regulations and ordinances will be created to establish requirements for post-construction runoff from new development and redevelopment projects. Third, the MS4 needs to develop a mechanism to ensure that there is long-term operation and maintenance of the BMPs. The objectives should be: • Develop and implement structural and non-structural BMPs. • Develop ordinances or regulations for runoff from new development and redevelopment projects. • Develop a mechanism to ensure long-term operation and maintenance of the BMPs. TumerCollie-". ,,-:" . ; 'J 􀀧􀀺􀀢􀀢􀀬􀀺􀀢􀀧􀀺􀁜􀁾􀀱􀀮 􀀺􀀻􀀬􀀠􀀮􀁟􀁾􀁾􀀠. " .. 􀁾􀀡􀀺􀁾􀀻􀀻􀀬􀀻􀀺􀀶􀀻􀁅􀀠FOR ATRIAL 􀁾􀁾􀁄ENDiNG ON 􀁔􀁾􀁾􀁦􀁁􀁒􀁓􀁔ANNUAL REPORT DUE DATE /' .'" 􀀢􀁾􀀢􀀬􀀮􀀺􀁟􀀨􀀭􀀺􀀮􀀬􀀬􀁟􀀻􀂷􀀮􀁣___.:., v '. -􀀧􀀭􀀢􀁾􀀺􀀻􀀧􀀺􀁾􀀬􀀺􀀭� �􀀻􀀮􀁾􀀢􀀠􀁾􀀠􀀧􀀻􀀢􀀧􀁾􀀮􀀼􀀮􀀭􀁾􀀧􀀢􀀮􀀠-􀀭􀀺􀁾􀀭􀀺􀀾􀀻􀀭--'it.' DEVELOP A STORMiwATER MANAGEMENT PROGRAM ,:-i<-:-:;'<\=:/.􀁾􀀠',-􀁾􀀠, -. ,··'c·';:,.h" * DEVELOP AN 􀁏􀁕􀁾􀁾􀁌􀁌􀁍􀁁􀁐AND INVENTORY * MANAGE DATA ACQUIRED DURING BMP IMPLEMENTA -nON * SIMPLY PRODUCE ANNUAL REPORTS Authorization and registration for trial use is required upon product installation. At the end of the trial use period, the software will automatically cease to function. If continued use of the software is requested at the end of the trial period based on execution of a purchase option, the software will be re-authorized. Ifcontinued use ofthe software is not requested at the end ofthetrial period, the user agrees to remove (uninstall) the software from the hard diskorother storage device and discontinue any and all use of the software. Purchase Options OPTION PAYMENT PAYMENT TOTAL TERM AMOUNT PRICE Purchase One payment $4,985 $4,985 (Up to 90 days after installation) 2 Payment Plan 5 Annual Payments $1,100 $5,500 (Up to 90 days after installation) 3 Purchase One payment $5,500 $5,500 the end of trial use n.,'''n,1I .5 REMINDER: Phase IT Permit Management -Software Package Presentation Page 1 of2 Jim Pierce From: Mary Tatum [mtatum@nctcog.orgj Sent: Thursday, July 10, 2003 5:00 PM To: 'dabraham@cityofallen.org'; 'Cathy.Allcorn@dentoncounty.com'; 'danderson@evermantx.net'; 'carolynfv@aol.com'; 'aaulenbach@hptx.org'; 'sballard@cityofterrell.org'; 'kenneth.banks@cityofdenton.com'; 'kbarnes@burlesontx.com'; 'pbaugh@ci.rowlett.tx.us'; 'jbaumgartner@cityofallen.org'; 'rberndt@tarrantcounty.com'; 'blacka@ci.farmersbranch.tx.us'; 'Bboomer@trcsolutions.com'; 'vbradley@ci.southlake.tx.us'; 'dbrouwer@ci.mesqui te.tx.us'; 'ccaldwell@ci.duncanville.tx.us'; 'jchambers@waxahachie.com'; 'jchancellor@ci.rowlett.tx.us'; 'dcheatham@ci.thecolony.tx.us'; Lcontreras73@hotmail.com'; 'pcouvillion@ci.frisco.tx.us'; lcrisp@dot.state.tx.us'; 'crottyr@ci.arlington.tx.us'; 'rachel.crowe@dentoncounty.com'; 'Icruise@ci.denison.tx.us'; 'mcurtis@nrhtx.com'; 'ndabbs@ci.the-colony.tx.us'; 'mdadgostar@hptx.org'; 'Ijames@co.collin.tx.us'; 'cfdibrell@ci.hurst.tx.us'; 'elise.dixon@cor.gov'; 'aduncan@utrwd.com'; 'PDUVALL@DOT.state.tx.us'; 'Craig.Eaton@fortworthgov.org'; 'tome@gwmail.plano.gov'; 'pfarahnak@cityofsouthlake.com'; 'water@ci.parker.tx.us'; 'mforeman@gptx.org'; 'steve.freeman@ci.mansfield.tx.us'; David Gattis; 'pantego@townofpantego.com'; 'tmorris@ci.denison.tx.us'; 'marina.giggleman@cityofcarroIRon.com'; 'ggillfla@gptx.org'; 'JOHNGFVM1@aol.com'; 'marvingregory@charter.nef; 'kgriffin@ci.coppell.tx.us'; 'phammons@ci.lancaster.tx.us'; 'jhanvey@ci.the-colony.tx.us' ; 'ronh@ci.hurst.tx.us'; 'THeimbur@dart.org'; 10el.henrle@dentoncounty.com'; 'thighfill@ci.saginaw.tx.us'; 'myronh@plano.gov'; 'mikehitt@cityofseagoville.org'; 'bho@cityofsachse.com'; 'mholzapf@ci.mesquite.tx.us'; 'bhowell@ha\tomcitytx.com'; 'howellk@ci.coJJeyville.tx.us'; 'dhowerton@ci.denison.tx.us'; 'eilschner@cityofkeller.com'; 'tx-james@charter.nef; 'djohnson@ci.stephenville. tx.us'; 'tomjohnson87@yahoo.com'; 'tjohnston@ci.the-coJony.tx.us'; jgilbert@ci.wylie.tx.us'; 'jonesj@ci.colJeyville.tx.us'; 'Jcjowell@bigtex.cLdallas.tx.us'; 'rkendall@lakedallas.com'; 'dkfndric@ci.mesquite.tx.us'; 'j.k.laporte@att.net'; 'kJeverich@ci.the-colony.tx.us'; 'Jim_Lockart@cor.gov'; 'nlollice@ci.grapevine.tx.us'; 'dmaJas@ci.irving.tx.us'; 'terry.manning@cityofcarrollton.c om'; 'martichk@ci.arlington.tx.us'; 'Larry@ci.hurst.tx.us'; 'jmccurl@dot.state.tx.us'; 'wmcdonaJd@cityofbalchsprings.com'; 'michaelmilisavljevich@hotmail.com'; 'adpw2@texoma.net'; 'cmitchell@highland village.org'; 'tom_moore@cor.gov'; 'pelicanbay.cityof@verizon.net'; 'KyJeo@plano.gov'; 'boliver@pbw.ci.dallas.tx.us'; 'recycle@texoma.net'; 'kermeth.parr@ftower-mound.com'; 'sean@cityofdwg.nef; 'hwp@freese.com'; 'tpetty@westlake-tx.org'; Jim Pierce; 'amandalpoweIl2002@yahoo.com'; 'rragland@ci.lancaster.tx.us'; 'GNRattan@tarrantcounty.corrr; johnniereagan@ci.watauga.tx.us'; 'Clarence.Reed@fortworthgov.org'; 'rhpw@earthlink.ne\'; 'timothy.riley@!lowermound.com'; 'municipalservices@sbcglobal.nef; 'arobinson@dallascounty.org'; 'RSaccomano@ci.frisco.tx.us'; ''dschwartz@ci.duncanville.tx.us'; 'jsexton@lakeworthtx.org'; 'msferra@ci.wylie.tx.us'; Mike Shingler; 'ksiddall@ci.irving.tx.us'; '51 cbreeze@prodigy.net'; 'msingle452_97@yahoo.com'; 'bsmallwood@ci.universitypark.tx.us'; 'ssoon@mcldnneytexas.org'; 'jspeer@ci.university-park.tx.us'; 'vspruill@ci.irving.tx.us'; 'cstandridge@ci.corsicana.tx.us'; 'rstark@gptx.org'; 'Iees@plano.gov'; 'Dewey.stoffsls@cedarhilltx.com'; 'tls@envtrainers.com'; 'rsullivan@ci.bedford.tx.us'; 'staylor@ci.coppell.tx.us'; 'jacque.thomas@ci.mansfield.tx.us'; 'ctodd@rockwall.com'; 'ctracy@apaienv.com'; 'cityofhutchins@prodigy.nef; 'tjunderwood@texoma.net'; 'alanu@gwmail.plano.gov'; 'fverhale@pbw.ci.dallas.tx.us'; 'jvuitel@gptx.org'; 'recycle@texoma.net'; 'ccanyon@airmail.net'; 'mwalter@ci.irving.tx .us'; 'heath@airmail.nef; 'Iweaver@cityoflewlsville.com'; 'hwebb@ci.frisco.tx.us'; 'neal@johnsoncountytx.org'; 'pwelsch@ci.garJand.tx.us'; 'bwhaling@ci.unlversity-park.tx.us'; 'whitep@ci.arlington.tx .us'; 'swhiteh@dot.state.tx.us'; 'bgw@ev1.net'; net'; 'juliw@cleburne.net'; 'wrights@ci.farmersbranch.tx.us'; 'ryoung@ci.euless.tx.us' Cc: Derin Warren; Keith Kennedy; Jeff Rice; Leslie Calderon; Tara O'Keefe Subject: REMINDER: Phase II Permit Management -Software Package Presentation Hello to all, I wanted to remind everyone of the presentation that CBI Systems of Beaumont will be making of their "Phase II MS4 Permit Manager" software on Wednesday, July 16 at 1 :30 p.m. at the COG offices, 616 Six Flags Drive, Arlington. Reservations are not necessary, but it would be helpful if you could let us know if you plan on attending the presentation. As was mentloned in the earlier email announcement, the software package is designed to assist MS4 owner/operators wlth developing and managing a storm water management plan and other aspects of permit compliance. This type of software is becoming more prevalent and some have found it quite useful. It is the same software that was presented at the TX DOT-Dallas District (Jim Crisp's office) back in February. Please Please visit http://www.cbi-svsjems.comlto leam more about the "Phase II MS4 Permit Manager". COG staff have not fully evaluated it and are not recommending or endorsing it in any way but simply wanted to provide you an opportunity to examine it for yourselves. " , ," <# . . . .--' . .' .. . , . -AOQI5QN CONFERENCE -"."'.; I r 􀁬􀁈􀁦􀁾􀁔􀁒􀁅􀀠CEN11lE-, . :. 􀁾􀀠. , ." -,,': 􀁾􀀧􀀮􀀠-" , -' '.", ',", , .." --, ::,:':.'.'-' " -',' .-",: '.: the interest of public safety and convenience, and then only by permission of the city manager. (3) Exception. The provisions of this section shall not apply to the city and utility companies when engaged in the installation or repair of utility lines situated within suchc buildings or structures. (4) Posting of sign. The owner of the property upon which activity is carried on or the general contractor shall be responsible for the posting of a sign in a clearly visible area at all entrances to construction sites that will statec the hours during which construction is allowed. Sec. 18-76. Storm water runoff. The International Building eode is amended by adding Section 3315 to read as follows: Section 3315. Storm water runoff. 3315.1. General requirements. It shall be unlawful for any person on any construction ( site to allow excessive storm water runoff to be discharged directly into any public street, alley or private street so as to create a nuisance. Should surface runoff be declared a nuisance by the city, the builder and/or developer of the site may' be required to construct dikes or dams on site to form detention areas such that storm water may be temporarily 􀀮􀁾􀀮􀁟􀀠detained until such storm abates at which point the trapped 􀁾􀀠water may be slowly released. It shall be the responsibility of the builder and/or developer at a construction site to remove any dirt or mud deposit on adjacent public streets.. alleys or private streets as a result of storm water runoff. Sec. 18-77. Building security. The International Building eode is amended by adding ehapter 36 to read as follows: c ehapter 36 Building Security, . , Section 3601. Title, purpose and 􀁳􀁣􀁾􀁥􀀮􀀠OFFIeE OF THE eITY SEeRETARY ORDINANeE NO. Design Manual for Construction The integrated Storm Water Management (iSWM) Design Manual for Construction is the source for guidance on construction site storm water management in the North Central Texas Region, The ,SWM Design Manual for Construction contains a stepwise methodology for creating an effective storm water pollution prevention plan for construction sites and detailed information for the deSign, installation, and maintenance of practices to reduce the release of sediment and other pollutants resulting from construction activities, The Design Manual for construction is also intended to assist public and private entities in compliance with the Texas Pollutant Discharge Elimination System (TPDES) General Permit for Construction Storm Water Runoff, TXR 150000, issued by the Texas Council on Environmental Quality (TCEQ), Table of Contents Chapter 1 -Construction Storm Water Control • Construction Storm Water Runoff Impacts • Factors Influencing Erosion Potential Chapter 2 -Regulatory Requirements • • TPDES Construction General Permit • Municipal Separate Storm Sewer System Permits • Other Local Requirements Chapter 3 -Storm Water Pollution Prevention Plan (SWPPP) Design and Implementation • Data Collection and Analysis • Ten Elements of a Construction SWPPP Best Management Practices In order to address the requirements of pollution reduction at construction sites, a variety of techniques should be employed to reduce soil erosion, reduce site sediment loss, and manage construction-generated waste and construction related toxic materials, Erosion Prevention BMPs • Interceptor Swale • Mulching • Diversion Dike • Erosion Control Blankets • Pipe Slope Drain • Channel Protection • Vegetation • Dust Control Sediment Loss Prevention BMPs • Silt Fence • Sediment Basin • OrganiC Filter Berm • Check Dam • Triangular Filter • Temporary Sediment Sediment Dike Tank • Stone Outlet Sediment • Stabilized Construction Trap Entrance • Inlet Protection • Wheel Wash Materials and Waste Management BMPs • Debris and Trash • • Sandblasting Waste Management , Management • Chemical Management • Sanitary Facilities • Concrete Waste • Lime Stabilization Management Management • Concrete Sawcutting Waste Management Additional information and files for free download are available at www.iswm.dfwinfo.com.Printed versions of the manual can be ordered from the North Central Texas Council of Governments at (817) 640-3300, iSWM' 􀀼􀁾􀀠ement Design Manual for Construction • Inspection and Maintenance of BMPs Chapter 4 -Best Management Practices • Erosion Prevention BMP Fact Sheets • Sediment Loss Prevention BMP Fact Sheets www.iswm.dfwinfo.com• Materials and Waste Management BMP Fact Sheets Storm Water Pollution Prevention Plan Design and Implementation The construction Storm Water Pollution Prevention Plan (SWPPP) is the primary tool for reducing erosion and preventing sediment loss from a construction site along with the control of construction related chemicals and wastes. The SWPPP consists of a written description (narrative) and drawing sheets that detail the existing conditions and the control methods to be employed on a construction site. The steps involved in developing an effective construction SWPPP include collection and analysis of physical site information followed by design and development of the narrative and drawing components of the SWPPP. Data Collection and Analysis Gathering information on site conditions will aid in the development of an effective construction SWPPP. The information should be documented and explained in the narrative and/or shown on the drawings. Conditions to be evaluated include: • Topography (slope, particularly steep slopes) • Drainage features (existing natural drainage patterns, swales, streams; and existing storm drain pipes) • Soils (soil type, erodibility, etc.) • Ground cover (trees, shrubs, grasses, etc.) • Critical areas (steep slopes, wetlands, floodplains, streams, lakes, etc.) • Adjacent areas (existing roads, buildings, etc.) • Precipitation (average rainfall amount and intensity during anticipated construction period) Construction SWPPP Development After collecting and analyzing the data to determine the site limitations, the designer can then develop the construction SWPPP. The steps outlined in the Ten Elements of a Construction SWPPP present a logical sequence for preparing a comprehensive storm water pollution plan based on the site conditions and sound erosion and sediment control practice. Ten Elements of a Construction SWPPP The Ten Elements provide a framework for proper SWPPP design, and are also intended to encompass the requirements of the TPDES Construction General Permit. Each of the Ten Elements must be considered and included in the SWPPP, unless site conditions render the step unnecessary. 1. Limit Soil Disturbance -To the greatest extent practicable, limit the ex1ent of clearing operations to preserve native topsoil and natural vegetation. Also, preserve natural drainage features and buffer areas. Provide measures to be implemented to ensure protection. 2. Prevent Soil Erosion -Provide temporary and permanent stabilization practices for disturbed areas of the site. 3. Protect Slopes -Provide practices to protect slopes and divert flows away from exposed soils or disturbed areas. 4. Minimize Sediment Loss from Site -Provide practices to lessen the off-site transport of sediment and to reduce generation of dust. Sediment basins are required, where feasible, for common drainage locations that serve an area with ten or more acres disturbed at one time. 5. Control Flow Rates and Stabilize Channels/Outfalls Provide velocity dissipation devices used at discharge locations and channel stabilization measures to provide non-erosive flows. 6. Establish Construction Access -Provide measures to minimize the off-site tracking of sediment by vehicles. 7. Protect Drain Inlets -Provide inlet protection measures to prevent sediment from entering the storm drain system. 8. Control Dewatering -Provide controls to prevent the offsite transport of suspended sediments and other pollutants in discharges from dewatering operations. 9. Control Waste and Pollutants -Provide practices and controls to reduce pollutants and spill prevention and response procedures associated with construction and waste materials. 10. Construction PhaSing and Project Management Consider project phasing in order to reduce the amount of soil exposed at one time. Inspection and Maintenance of BMPs Most Best Management Practices used to limit erosion and reduce sediment loss on construction sites are temporary devices. Inherent in the design of the devices is the need for maintenance. The devices will not perform at peak efficiency throughout the duration of the construction project without inspection and necessary maintenance. All BMPs must be inspected, maintained, and repaired as needed to assure continued performance of their intended function. Whenever inspection reveals that the BMPs identified in the construction SWPPP are inadequate, the SWPPP must be modified accordingly in a timely manner. BMPs must then be added or modified in accordance with SWPPP changes.