NPDES Stormwater Training

Transcription

1 WQMP Basic Training for Local Agency Staff Whitewater River Region Water Quality Management Plans For Urban Runoff Rev. 4/2010 Why are we here? The State of California has determined that discharges of stormwater and runoff from urban areas convey pollutants to downstream receiving waters. The Regional Water Quality Control Board has issued a National Pollutant Discharge Elimination System (NPDES) permit to County of Riverside, Incorporated Cities in the Whitewater River Watershed. Riverside County Flood Control & Water Conservation District And Coachella Valley Water District, The Permit requires the Permittees to implement programs to reduce pollutants in stormwater and urban runoff discharges in order to protect and restore the beneficial uses of receiving waters. NPDES Permit CAS617002, Order No. R includes the requirements for New Development and Redevelopment projects. The requirements for New Development and Redevelopment are the subject of today s training. 2 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Session Break(s) Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 3 1

2 Introductions AEI-CASC Instructor Jeff Endicott, PE, BCEE, CPESC Audience Introductions Engineering Department Planning Department Building Department Code Enforcement Management Others? Your Hosts for Today City of La Quinta Whitewater River Municipal Stormwater Management Program 4 Training Process Restrooms Cell phones turn off, set to vibrate, or set to stun If you must take a call, we ll stop talking and all listen in! Mid-session break is planned Questions We have a lot to cover In-scope questions Please signal We ll take them to the extent that many will benefit Out-of-scope questions will be deferred Goal To complete the session within 4 hours Sticking to the process will help accomplish this goal! I will be available after the session if you have additional questions 5 Training Session Objectives To be aware of the State NPDES Permit that all your agencies are subject to To understand the Programs your Agency has committed to implement to protect water quality To understand the requirements for: New Development Projects Re-Development Projects Other Projects 6 2

3 Documents Provided for Class Today Let s take a quick look at them! WQMP Template Example BMP Design Volume and BMP Design Flow Calculation Worksheets WQMP Useful References 7 Other Important WQMP-Related Documents Let s take a quick look at them! Whitewater River Region Stormwater Management Plan Water Quality Management Plan for Urban Runoff Stormwater Quality BMP Design Handbook 2006 CWA Section 303(d) List of Water Quality Limited Segments Since most attendees will already have these documents, copies are not provided in today s class. 8 WQMP Basic Training For Local Agency Staff Stormwater/Urban Runoff Program Overview Whitewater River Region Water Quality Management Plans For Urban Runoff 3

4 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 10 Whitewater River Region - Stormwater and Urban Runoff Permit Coverage NPDES Permit applies to operators of municipal storm drain systems between the San Gorgonio Pass area and the Salton Sea Includes the following Permittees : Banning Cathedral City Coachella Coachella Valley Water District Desert Hot Springs Indian Wells Indio La Quinta Palm Desert Palm Springs Rancho Mirage Riverside County Riverside County Flood Control and Water Conservation District 11 Whitewater River Region - Stormwater and Urban Runoff Permit Coverage - Summary The NPDES Permit Regulates Discharge of stormwater containing pollutants Non-Storm water discharges Requires Permittees to Minimize impacts of urban runoff on receiving waters to the Maximum Extent Practicable (MEP) Specifically implement a program to control water pollution associated with new development and redevelopment Require discretionary New Development and Redevelopment projects (Priority Development Projects) comply with WQMP design standards, including Site Design, Source Control, and Treatment Control BMPs. 12 4

5 Whitewater River Region - Stormwater and Urban Runoff Permit Coverage Entities that are not Permittees (SWMP Section 1.4): California and Federal Facilities Native American Tribal Lands Utilities and Special Districts Agricultural Activities (Exempted by the CWA) Comprises 57% of the Whitewater River Watershed These entities may be subject to municipal programs Check with the Permittee s NPDES Coordinator to determine whether the Permittee s programs apply to these entities and their projects within the Permittee s jurisdiction 13 SWMP Overview Describes the Permittees approach to comply with all aspects of the 2008 NPDES permit Describes a program for each Permittee to ensure that controls are in place to prevent or minimize water quality impacts from New Development and Redevelopment Projects to the MEP Requires Priority Development Projects comply with WQMP requirements! 14 WQMP - Water Quality Management Plan for Urban Runoff Describes specific requirements that apply to Development and Re- Development Projects Specifically addresses postconstruction urban runoff Guidelines for project-specific post-construction Best Management Practices (BMPs) Site Design BMPs Source Control BMPs Treatment Control BMPs Guidelines for Sub-Regional and Regional BMPs Provides a Template to aid in the preparation of WQMPs 15 5

6 Water Quality Management Plan Template Serves as the model for the content and organization of a Water Quality Management Plan (WQMP) Functions as a Template Microsoft Word Verified functional in Microsoft Word 2003 and 2007 A Permittee may approve an alternative Template 16 Development Program Summary Your Agency is responsible for implementing development regulations within its jurisdiction, and for compliance with the NPDES permit The WQMP is a key element of development programs Not requiring an appropriate and complete WQMP could cause your Agency to be FINED by the State Priority Development Projects submitted on or after June 15, 2009 must submit a Water Quality Management Plan (WQMP) for review and approval by the Permittee and for implementation during development 17 WQMP Basic Training For Local Agency Staff Water Quality Management Plans Overview and Projects Requiring a WQMP Whitewater River Region Water Quality Management Plans For Urban Runoff 6

7 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 19 First Things First! What Is A WQMP? Water Quality Management Plan The WQMP is a project-specific plan of Best Management Practices (BMPs) to address postconstruction urban runoff quality and quantity to protect receiving waters. Requires BMPs, including site design, source controls, and treatment controls. 20 Project-Specific WQMP Water Quality Management Plan The Final Project-Specific WQMP Is a planning level document that: Is expected to identify and show the location of structural BMPs Is expected to provide design parameters and design concepts for treatment BMPs Should set aside sufficient space for the BMPs Must be approved prior to issuance of building or grading permits Final Project plans should be checked for consistency with the WQMP 21 7

8 Project Lifecycle and WQMPs DEVELOPMENT RAW LAND PROJECT PLANNING AND DESIGN PROJECT CONSTRUCTION PROJECT O&M REDEVELOPMENT Pollution Prevention Is Now Part Of Every Project Stage! This is the domain of the Water Quality Management Plan The WQMP This is the domain of the Storm Water Pollution Prevention Plan The SWPPP 22 Which Projects Require a WQMP? So which projects require a WQMP? AWQMP is required for Priority Development Projects (PDP) One page of information is usually sufficient for determining a project category and whether a WQMP will be required. 23 Project Proposal Received Determine Project Category Priority Development Projects Conditions of Approval* Other Development Projects Conditions of Approval: Require Project Specific WQMP Conditions of Approval: Require Minimum Source Control BMPs Approve Final Project Specific WQMP Plan Check and Approval Building or Grading Permits Construction 8

9 Project Proposal Received Determine Project Category Priority Development Projects Conditions of Approval* Other Development Projects Conditions of Approval: Require Project Specific WQMP Approve Final Project Specific WQMP Conditions of Approval: Require Minimum Source Control BMPs *A WQMP may be submitted as preliminary during discretionary or land use entitlement phase. FINAL WQMP Approval is required prior to issuance of the first approval or building / grading permit.* Plan Check and Approval Building or Grading Permits Construction Project Proposal Received Determine Project Category Priority Development Projects Conditions of Approval* Other Development Projects Conditions of Approval: Require Project Specific WQMP Approve Final Project Specific WQMP Conditions of Approval: Require Minimum Source Control BMPs Other Development Projects WQMP not usually required. You may still require one if you believe the project poses a threat to water quality. Plan Check and Approval Building or Grading Permits Construction Preliminary Project-Specific WQMP A Preliminary Project-Specific WQMP may be required When a project is subject to discretionary approval during the planning and entitlement process (tentative tract map, parcel map, or subdivision map) and Will be subject to ministerial approvals for subsequent grading or building permits Submit Preliminary WQMP with project application 27 9

10 Preliminary Project-Specific WQMP Level of detail in a Preliminary Project-Specific WQMP will depend on the overall project design at the time project approval is sought. Key point The Preliminary WQMP needs to be specific enough to identify the land required for BMP implementation! Many cities have adopted City-specific requirements to guide the Preliminary WQMP process A Final Project-Specific WQMP that is in substantial conformance with the Preliminary Project-Specific WQMP (and in full conformance with the WQMP Guidance) will be required prior to issuance of any building or grading permit. 28 Final Project-Specific WQMP The Final Project-Specific WQMP will contain Site Design BMPs Source Control BMPs Treatment Control BMPs BMP maintenance descriptions BMP funding description BMP operation responsibilities Must conform to the Guidance! Permittees may supplement the Guidance with Agencyspecific requirements. 29 New Development and Redevelopment Priority Development Projects So what kinds of projects are PDPs? 30 10

11 New Development and Redevelopment Determining Project Category A correct Project Category determination is essential! The correct Project Category is easy to determine for most projects When a project falls into the gray areas of the category definitions Consult your agency s NPDES Coordinator for guidance An incorrect determination of Project Category could create significant future headaches such as Permit enforcement actions against the agency or owner Against the Agency under the Municipal NPDES permit Against the Owner under the General Construction NPDES Permit Requirements to retrofit a complete or near-complete project 31 New Development and Redevelopment PDP: Single-Family Hillside Residence 10,000 square feet or more of impervious surface is created AND The natural slope is 25% or more OR The natural is 10% or more and erosive soil conditions are known 32 New Development and Redevelopment PDP: Commercial and Industrial Commercial and Industrial developments of 100,000 square feet or more Examples include: Recreational facilities Mini-malls Hotels Office buildings Warehouses Light industrial facilities Heavy industrial facilities 33 11

12 New Development and Redevelopment PDP: Automotive Repair Shops Based on Standard Industrial Classification Codes Motor Vehicle Supplies and New Parts Top, Body, Upholstery Repair Shops and Paint Shops Automotive Exhaust System Repair Shops Tire Retreading and Repair Shops Automotive Transmission Repair Shops General Automotive Repair Shops Automotive Repair Shops, NEC 34 New Development and Redevelopment PDP: Retail Gasoline Outlets Where project disturbs greater than 5,000 square feet 35 New Development and Redevelopment PDP: Restaurants Where development disturbs greater than 5,000 square feet 36 12

13 New Development and Redevelopment PDP: Home Subdivisions Construction of 10 or more housing units Examples include: Single family dwelling units Multi-family dwelling units Condominiums Apartments 37 New Development and Redevelopment PDP: Parking Lots Parking potentially exposed to urban runoff AND 5,000 square feet or more of impervious surface OR 25 or more spaces 38 Determining Project Category SWMP Figure 4-2 Useful tool Permittees may use to determine project category Simple to use checklist Provides a place to document category determination! WQMP Guidance Section 1 also provides a description of each project category 39 13

14 New Development and Redevelopment Public Works Projects A WQMP is required for Public Works Projects that have similarities to Priority Development Projects (PDP) 40 New Development and Redevelopment Public Works Projects Public Works projects must incorporate Site Design and Source Control (structural and non-structural) BMPs A Public Works project must have a WQMP if: it has similar functions or characteristics of a Priority Development Project, or may conduct similar activities after construction Examples Include: A corporation yard with a vehicle and equipment maintenance facility is similar to an automotive repair shop A civic center or library has characteristics similar to a commercial office building A senior center with a cafeteria is similar to a restaurant 41 New Development and Redevelopment Projects Requiring a WQMP Priority Development Projects (Thresholds Apply Details in SWMP) Single Family Hillside Residence Industrial and Commercial Automotive Repair Shops Retail Gasoline Outlets Restaurants Single Family 10 or more units Parking Lots Public Works Projects with similarities to Priority Development Projects 42 14

15 New Development and Redevelopment Other Development Projects A WQMP is not required* for Other Development Projects *Agencies may require a WQMP on any project where deemed necessary to protect receiving waters from the impacts of urban runoff. 43 New Development and Redevelopment Other Development Projects Other Development Projects Projects that are not Priority Development Projects AND Discharge into a MS4 AND Disturb an area of one acre or more, or less than one acre if part of a larger plan of development Other Development elopment Projects are not required* to prepare a WQMP *Agencies may require a WQMP on any project where deemed necessary to protect receiving waters from the impacts of urban runoff Other Development Projects must incorporate a combination of Structural and Non-Structural Source Control BMPs as applicable and feasible. See SWMP Section for description of these BMPs 44 WQMP Basic Training For Local Agency Staff Using the WQMP Template Front Cover through Section III Whitewater River Region Water Quality Management Plans For Urban Runoff 15

16 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 46 is useful in preparing a WQMP is available for download /NPDES/ WhitewaterWS.aspx Scroll down and select the WQMP tab to find the download link 47 A Look Inside WQMP Template is a Microsoft Word Template MS Word 2003 and 2007 Compatible WQMP Template utilizes hidden text to provide instructions Successful use of the WQMP Template requires reading the Note to Preparer Viewing hidden text on screen Hiding hidden text when printing 48 16

17 A Look Inside Cover Owner s Certification Contents Sections I. Project Description II. Site Characterization III. Pollutants of Concern IV. Hydrologic Conditions of Concern V. Best Management Practices VI. Operation and Maintenance Responsibility for BMPs VII. Funding Let s take a hike through the WQMP Template. We ll discuss selected elements. Appendices A. Conditions of Approval B. Vicinity Map, WQMP Site Plan, and Receiving Water Map C. Supporting Detail Related to Hydrologic Conditions of Concern D. Educational Materials E. Soils Report F. Site Design and Treatment Control BMP Sizing Calculations and Design Details G. Agreements Ensuring On-Going O&M and Funding H. Phase I Environmental Assessment I. WQMP Summary Data Form 49 Cover Sheet, Owners Certification, TOC Content is generally selfexplanatory For a Preliminary WQMP, add the word Preliminary Complete identification information aids in the review and approval of the WQMP WQMPs must be signed and sealed by a Civil Engineer Agency may waive signature on Preliminary WQMPs Owner must certify the WQMP Instructions disappear when document is printed We ll skip over most of the self-explanatory material and focus on key elements of the WQMP 50 I Project Description Content is generally self explanatory Watershed All projects subject to this WQMP are in the Whitewater River Watershed Sub-Watershed Guidance Use Table 2 from the WQMP Guidance to identify the sub-watershed Guidance Watershed maps can be found at hitewaterws.aspx. Scroll down and select the Map tab

18 I Project Description WQMP Guidance Table 2 52 I Project Description Scroll down to Map tab. 53 I Project Description Standard Industrial Classification Codes (SIC) provide information about planned uses Guidance When the tenant is unknown, codes covering potential uses should be used. Too narrow of a choice could require the WQMP be amended and added controls installed Additional Permits Guidance Other permits often contain requirements related to urban runoff. Avoid redundant efforts, consider requirements of all permits

19 I Project Description Describe Project Guidance Provide a detailed project description WQMP Appendix References Conditions of Approval Guidance Include copy and highlight g applicable conditions Vicinity Map Guidance Provide sufficient detail to locate project Receiving Water Map Site Plan Guidance Provide the listed details. May require multiple sheets This field expands to accommodate a detailed project description. Most projects require one to two pages for an adequate description. 55 I Project Description Example Receiving Water Map Coachella Valley Storm Water Channel Project Site Salton Sea is NOT listed! Limit to waters listed in SWMP Table 2 or Figure 2 Appendix B#-Tract Receiving Water Map 56 II Site Characterization Current and Proposed Property Use - Describe Guidance Existing use may be used to indicate legacy pollutants Guidance Proposed use must be consistent with the SIC codes provided in Section I Project Description 57 19

20 II Site Characterization Soils Report Check Y or N Guidance Report is required if infiltration BMPs are proposed. Include in Appendix E. Guidance Make sure that appropriate p infiltration testing and evaluation methods are utilized in the soils investigation Phase 1 Site Assessment Check Y or N Guidance The Phase 1 report, if available, helps identify potential legacy pollutants. Include the report/summary in Appendix H. 58 II Site Characterization Finding this information is easy! Stay tuned to learn how! Receiving Water summary table List tributary receiving waters from upstream to downstream Guidance Use the map prepared p in Section I Project Description List 303(d) impairments of receiving waters, if any List designated beneficial uses of receiving waters List proximity of site to any downstream receiving water with a RARE beneficial use 59 II Site Characterization Example 303(d) List Impairment Determination Receiving Water Nam me Pollutant / Stressor Get the List! Useful References Sheet, Item 5. Also one of the class handouts. Coachella Valley Storm Water Channel 303(d) Impairments: Pathogens and Toxaphene 60 20

21 II Site Characterization Example Designated Beneficial Use Determination WQMP Guidance Table 3 Proximity = Flow Distance, Site to RARE Rec. Water 61 III Pollutants of Concern Pollutants of Concern Detailed instructions will disappear when the WQMP Template is printed. Guidance The instructions contain succinct, but important guidance. Read and understand the instructions! 62 III Pollutants of Concern Pollutant of Concern Summary Table Pollutant Category Potential for Project? Guidance Answer Yes or No Causing Receiving i Water Impairment? Guidance Answer Yes or No. Refer to the Receiving Water Summary Table, 303(d) List of Impairments, prepared in Section II Site Characterization 63 21

22 III Pollutants of Concern Example Determination of Potential Pollutants WQMP Guidance Exhibit 2 Type of Developmen nt Potential Pollutants N = Not a Potential Pollutant P = A Potential Pollutant 64 III Pollutants of Concern Example Determination of Potential Pollutants Table Notes are important! Notes 1-3 specify activities or site features associated with the Potential Pollutant. 1. A potential pollutant if landscaping or open area exists on the Project site. 2. A potential pollutant if the project includes uncovered parking areas. 3. A potential pollutant if land use involves animal waste. Notes 1-3 allow a Potential Pollutant to be eliminated if the activity or site feature is Not Part of the Project. Notes 4-6 only clarify the nature of a Potential Pollutant. 4. Specifically, petroleum hydrocarbons. 5. Specifically, solvents. 6. Bacterial indicators are routinely detected in pavement runoff. WQMP Guidance Exhibit 2 65 III Pollutants of Concern Example Determination of Potential Pollutants Identify Potential Project Pollutants Restaurant and Parking Lot with Landscaping 66 22

23 III Pollutants of Concern Example Determination of Potential Pollutants Restaurant and Parking Lot with Landscaping Coachella Valley Storm Water Channel Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes - Pathogens Yes - Toxaphene Check Phase 1 Report for Legacy Pollutants 67 III Pollutants of Concern Address these pollutants using BMPs Why a Correct Determination Matters! Receiving Water Pollutant and Stressors Project Potential Pollutants and Legacy Pollutants Address these pollutants using BMPS with a High or Medium effectiveness 68 WQMP Basic Training For Local Agency Staff Using the WQMP Template Section IV through Section V Whitewater River Region Water Quality Management Plans For Urban Runoff 23

24 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 70 IV Hydrologic Conditions of Concern Hydrologic Conditions of Concern HCOC Defined: Changes caused by a New Development or Redevelopment Project to Urban Runoff flow rates, velocities, durations and/or volumes that cause significant downstream erosion beyond the pre-development condition or cause significant adverse impacts to stream habitat. (Glossary, WQMP Guidance) 71 IV Hydrologic Conditions of Concern On-Site Retention Required? Check Yes or No Guidance Check Yes if local ordinances require the project to retain urban runoff on site. WQMP Guidance Table 6 identifies agencies with retention requirements. If Yes is checked, then this Section IV is DONE! Guidance Check No if local ordinances do not require the project to retain urban runoff on site (even if the project will retain said runoff) If No is checked, then this Section must be completed 72 24

25 IV Hydrologic Conditions of Concern WQMP Guidance, Table 6 Provides overview of retention requirements for local agencies Examples Guidance - When retention requirement is waived for the project, you must answer No and prepare Section IV 73 IV Hydrologic Conditions of Concern HCOC Prevention by Definition Check the Condition applicable to the project. Condition A Runoff from the Project is discharged directly to a publicly-owned, operated and maintained MS4; the discharge is in full compliance with Permittee requirements for connections and discharges to the MS4 (including both quality and quantity requirements); the discharge would not significantly impact stream habitat in proximate Receiving Waters; and the discharge is authorized by the Permittee. 74 IV Hydrologic Conditions of Concern HCOC Prevention by Definition Condition B The project disturbs less than 1 acre and is not part of a larger common plan of development that exceeds 1 acre of disturbance. The disturbed area calculation must include all disturbances associated with larger common plans of development 75 25

26 IV Hydrologic Conditions of Concern HCOC Prevention by Definition Condition C The project s runoff flow rate, volume, velocity and duration for the post-development condition do not exceed the predevelopment condition for the 2-year, 24-hour and 10-year, 24-hour rainfall events. This condition can be achieved by minimizing impervious area on a site and incorporating other sitedesign concepts that mimic predevelopment conditons. This condition must be substantiated by hydrologic modeling methods acceptable to the Permittee. 76 IV Hydrologic Conditions of Concern HCOC Prevention by Definition None Select this option when Condition A, Condition B, or Condition C cannot be checked Guidance An HCOC evaluation will need to take place. 77 IV Hydrologic Conditions of Concern HCOC Prevention by Definition Provide summary hydrology information for the pre- and post-development condition at each discharge point, including Discharge 2-yr, 24-hr & 10-yr yr, 24-hr Events, Velocity Pre- & Post Volume Development Duration Conditions, With BMPs 78 26

27 IV Hydrologic Conditions of Concern HCOC Evaluations HCOC Evaluations Required for projects not subject to retention ordinances and that can t substantiate Condition A, Condition B, or Condition C HCOC Evaluation Objective (WQMP Guidance, Section 3.4) To demonstrate that discharge flow rates, velocities, durations, and volumes from a 2-year and 10-year, 24-hour rainfall event well not significantly impact downstream erosion or stream habitat. Guidance Engage the environmental professionals conducting the project s CEQA review in the identification and evaluation of the project s impact on downstream habitat while considering the criteria in the WQMP Guidance. Supportive findings provide valuable support to the demonstrations that must be included in the WQMP 79 IV Hydrologic Conditions of Concern HCOC Mitigation Projects with adverse hydrologic impacts that are not fully mitigated through Site Design BMPs shall, in consultation with the Permittee, implement Methodology A or Methodology B Methodology A A Detetention Basin capable of the following: 1. Releasing the post-development 2-year and 10-year, 24- hour volume at flow rates less than or equal to the predevelopment 2-year and 10-year, 24-hour peak flow rates, respectively. 2. Passing the 100-year storm event without damage to the facility. 3. Controlling outlet velocities such that downstream erosion and habitat loss is minimized. The basin may also function as a water quality extended detention basin, or serve other multi-use functions, with the approval of the Agency. 80 IV Hydrologic Conditions of Concern HCOC Mitigation Projects with adverse hydrologic impacts that are not fully mitigated through Site Design BMPs shall, in consultation with the Permittee, implement Methodology A or Methodology B Methodology B Any method acceptable to the Agency that: 1. Implements Site Design, Source Control, and Treatment Control BMPs and/or other measures capable of mitigating the assessed hydrologic impacts. The method must be supported by hydrologic modeling or other sufficient documentation. Sufficient documentation could include reference to EPA, CASQA, SWRCB and/or other approved studies supporting the use of the method. 2. Ensures that the project will be consistent with any approved master plans of drainage or analogous plans or programs

28 Best Management Practices Essential elements for effective water pollution control Defined in 40 CFR as schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of Waters of the U.S. BMPs also include treatment requirements, operating procedures and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage. (WQMP Guidance, Exhibit 6) WQMPs must include Site Design BMPs Treatment Control BMPs Source Control BMPs 82 Whitewater River Region WQMP BMPs - Site Design, Treatment Control, and Source Control Site Design BMPs Site Design BMPs Any project design feature that reduces the creation or severity of potential pollutant sources or reduces the alteration of the project site s natural flow regime. Redevelopment projects that are undertaken to remove pollutant sources (such as existing surface parking lots and other impervious surfaces) or to reduce the need for new roads and other impervious surfaces (as compared to conventional or low-density new development) by incorporating higher densities and/or mixed land uses into the project design, are also considered site design BMPs. (WQMP Guidance, Exhibit 6) 83 Whitewater River Region WQMP BMPs - Site Design, Treatment Control, and Source Control Treatment Control BMPs Treatment Control BMPs Any engineered system designed and constructed to remove pollutants from urban runoff. Pollutant removal is achieved by simple gravity settling of particulate pollutants, filtration, biological uptake, media adsorption or any other physical, biological, or chemical process. (WQMP Guidance, Exhibit 6) 84 28

29 Whitewater River Region WQMP BMPs - Site Design, Treatment Control, and Source Control Source Control BMPs Source Control BMPs In general, activities or programs to educate the public or provide low cost nonphysical solutions, as well as facility design or practices aimed to limit the contact between pollutant sources and Urban Runoff or authorized non-stormwater. Examples include activity schedules, prohibitions of practices, street sweeping, facility maintenance, detection and elimination of illicit connections and illegal dumping, and other non-structural measures. Facility design examples include providing attached lids to trash containers, or roof or awning over material and trash storage areas to prevent direct contact between water and pollutants. (WQMP Guidance, Exhibit 6) 85 Whitewater River Region BMPs to Incorporate into WQMPs Site Design BMPs *Site Design is a stormwater program goal and gets reported to the Regional Board! Treatment Control BMPs Utilize Site Design BMPs to the extent feasible to meet 100% of treatment requirements* Utilize Treatment Control BMPs to meet the treatment requirements where Site Design BMPs are infeasible Source Control BMPs Utilize Non-Structural and Structural Source Control BMPs unless they do not apply given project features 86 BMP Examples Let s take a look at some common BMPs 87 29

30 BMP Examples BMP TYPE Site Design and Treatment Control BMP NAME Porous Pavement 88 BMP Examples BMP TYPE Site Design and Treatment Control BMP NAME Infiltration Trench 89 BMP Examples BMP TYPE Site Design and Treatment Control BMP NAME Vegetated Swale 90 30

31 BMP Examples BMP TYPE Site Design and Treatment Control BMP NAME Extended Detention Basin 91 BMP Examples BMP TYPE Treatment Control BMP NAME Conventional Sand Filter Source: 92 BMP Examples BMP TYPE Treatment Control BMP NAME Manufactured/Proprietary Device Source:

32 BMP Examples BMP TYPE Non-Structural Source Control BMP NAME Education 94 BMP Examples BMP TYPE Structural Source Control BMP NAME MS4 Stenciling and Signage 95 BMP Examples BMP TYPE Structural Source Control BMP NAME Outdoor Material Storage Area 96 32

33 Integration of BMPs Begin process by reviewing results of research, analysis, and documentation conducted while completing earlier sections of the WQMP Template Section I - Project Description Section II Site Characterization Section III Pollutants of Concern Section IV Hydrology Conditions of Concern Section Results of this research, analysis, and documentation will inform the site evaluation and BMP selection process The process is usually iterative Sections I V may need to be re-evaluated or revised based on the results of the Site Plan review and evaluation 97 Site Plan Evaluation for Integration of BMPs Base Site Plan Site Plan Evaluation for Integration of BMPs Base Site Plan Buildings Highlighted 33

34 Site Plan Evaluation for Integration of BMPs Base Site Plan Landscaping Highlighted Site Plan Evaluation for Integration of BMPs Base Site Plan Hardscaping 1 Highlighted Site Plan Evaluation for Integration of BMPs Base Site Plan Hardscaping 2 Highlighted 34

35 Site Plan Evaluation for Integration of BMPs Porous Pavement Bioretention Covered Outdoor Storage Vegetated Swale MS4 Stenciling Site Plan Evaluation for Integration of BMPs Porous Pavement Bioretention Covered Outdoor Storage Vegetated Swale MS4 Stenciling 104 Let s get back to the WQMP Template!

36 Haven t we seen this question before? See Section IV Hydrologic Conditions of Concern On-Site Retention Required? Check Yes or No Guidance Check Yes if local l ordinances require the project to retain urban runoff on site. If Yes is checked, then this Section V.1 is DONE! Guidance Check No if local ordinances do not require the project to retain urban runoff on site (even if the project will retain said runoff) If No is checked, then this Section must be completed Retention provided, but not required by local ordinances, becomes an important Site Design BMP and/or Treatment Control BMP 106 Selecting BMPs Table 2 is used to identify appropriate BMPs Guidance Table 2 is used in conjunction with Table 1 developed in Section III Pollutants of Concern 107 Address these pollutants using BMPs All pollutants are NOT the same Receiving Water Pollutant and Stressors Project Potential Pollutants and Legacy Pollutants Address these pollutants using BMPs with a High or Medium effectiveness

37 Identify BMP Efficiency BMP Categories Potential Pollutants Pollutant Removal Efficiency H = High H/M = High or Medium M = Medium L/M = Low or Medium L = Low U = Unknown 109 Example BMP Selection 110 Site Design BMPs The project shall incorporate each of the following Site Design concepts to the extent feasible Concept 1 Minimize Urban Runoff, Minimize Impervious Footprint, and Conserve Natural Areas Concept 2 Minimize Directly Connected Impervious Area

38 Site Design Concept Document Site Design BMPs Insert a narrative describing how Site Design BMPs will be implemented Include detailed narrative for each Site Design BMP Insert a narrative describing how Agency-approved alternative or equally effective Site Design BMPs will be implemented Include detailed narrative for each agency-approved alternative or equally effective Site Design BMP Specifically describe the agency alternative or how equality was established 113 Measureable Goal The measurable goal shall be to have 100% of the Treatment Control BMP requirement (Section F.1.c.v.4) achieved through use of Site Design BMPs. (WQMP Guidance, Section ) NPDES Permit Section F.1.c.v.4 provides alternatives for treatment requirements. Treatment requirements for the Whitewater River Region have been standardized and are described in the Whitewater River Region Stormwater Quality Best Management Practice Design Handbook

39 Measurable Goal Documentation BMP Drainage Area ID for each Site Design BMP BMP Type (e.g., Biofilter, Infiltration Basin) Pollutants Potentially Generated in Sub-Area and Impairing Receiving Waters BMP Effectiveness for Pollutants Impairing Receiving Waters BMP Design Standard (e.g., V BMP or Q BMP ) BMP Tributary Area 115 Treatment Control BMPs Treatment Control BMPs are required to address POCs where it is infeasible to meet the measureable goal through Site Design BMPs Site Design BMPs Address or Do Not Address the POCs for the entire project site? If Site Design BMPs Address POCs for the entire site, Section V.1.B need not be completed If Site Design BMPs Do Not Address the POCs for the entire site, Section V.1.B must be completed Treatment Control BMPs must be selected, sized, and implemented to address POCs for all sub-areas not fully addressed with Site Design BMPs

40 Treatment Control BMPs BMP Drainage Area ID for each Treatment Control BMP BMP Type (e.g, Detention Basin, Filtration System) Pollutants Potentially Generated in Sub-Area and Impairing Receiving Waters BMP Effectiveness for Pollutants Impairing Receiving Waters BMP Design Standard (e.g., V BMP or Q BMP ) BMP Tributary Area 118 Measurable Goal Summary Document the extent to which the Measureable Goal will be achieved with Site Design BMPs Table 6 is used to document the extent t the Measureable Goal will be achieved 119 Measurable Goal Documentation Total Area Addressed with Site Design BMPs Total Area Addressed with Treatment Control BMPs Calculate Percent of Measureable Goal Achieved Area Treated with Site Design BMPs divided by Total Treated Area (Site Design and Treatment Control), Expressed as a Percentage

41 Source Control BMPs All applicable Source Control BMPs must be implemented on each project, including Non-Structural Source Controls Structural t Source Controls 121 Treatment Control BMP Alternatives Equivalent Treatment Control BMP Alternatives Treatment Control BMPs may be provided off site when approved by the Agency Regionally-Based Treatment Control BMPs Treatment Control BMP requirements may be met by participating in a Regional BMP Program Off-site and Regionally-based treatment controls are not feasible for most projects and will not be covered further in this class. Consultant your agency s NPDES Coordinator for further information about these alternatives. 122 WQMP Basic Training For Local Agency Staff Using the WQMP Template Section VI through Section VII and Appendices Whitewater River Region Water Quality Management Plans For Urban Runoff 41

42 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 124 VI O&M Responsibility for BMPs Operation and Maintenance Responsibility for BMPs O&M requirements for all structural Site Design, Treatment Control, and Source Control BMPs shall be identified Where a Public Agency is identified as the funding source and responsible party for a BMP A copy of the written agreement showing the Agency s acceptance of said responsibilities shall be included in Appendix G of the WQMP 125 VI O&M Responsibility for BMPs Operation and Maintenance Details to Include in the WQMP Identify each BMP that requires O&M Describe O&M activities and process, and the handling and placement of wastes Provide BMP start-up dates Identity the frequency of O&M for each BMP Identify parties responsible for BMP O&M, and provide a copy of the O&M agreement Describe self-inspections and record keeping requirements and the party responsible Describe any required monitoring

43 VI O&M Responsibility for BMPs BMP O&M Resource California Stormwater Qualty Association (CASQA) New Development Handbook Excellent Resource for BMP O&M Information Riverside County Whitewater River Region Stormwater Quality Best Management Practice Design Handbook (June 2009) Planned update of the Handbook will add O&M information! 127 VII - Funding Funding A funding source for O&M of Site Design and Treatment Controls must be identified Applicants, in certifying the WQMP are certifying that the funding responsibilities have been addressed, and that funding responsibilities will be transferred to future owners Guidance Funding responsibilities are commonly recorded against the deed Identify and describe the source of funding for BMP O&M 128 Appendix A Conditions of Approval Include the Project s Conditions of Approval Guidance Highlight Conditions of Approval related to control of Urban Runoff Conditions of Approval related to control of Urban Runoff must be satisfied as specified in the condition, typically prior to issuance of grading or building permits or prior to issuance of a Certificate of Occupancy

44 Appendix B Vicinity Map, WQMP Site Plan, and Receiving Waters Map Vicinity Map showing Project site Surrounding planning area Guidance The Vicinity Map must be in sufficient detail to allow the site to be plotted on Agency base maps 130 Appendix B WQMP Site Plan showing Structures and intended use Paved areas and intended use Landscaped areas Infrastructure that will revert to agency ownership and operation Location of existing / proposed drainage facilities Proposed structural BMPs, their locations, references to details, specs, and product information Locations where onsite and tributary offsite flows exit the project site Tributary area boundaries, including offsite areas, for each location where flows exit the property. Pre- and post-project topography Guidance Standard d sized engineering drawings are required by most agencies. Multiple drawings are appropriate for all but the most basic projects. The WQMP is for Post-Construction - Do Not include SWPPP details on the WQMP Site Plan 131 Appendix B Receiving Waters Map Location of Receiving Waters to which the project directly or indirectly discharges Guidance Show Project location Path urban runoff follows to reach Receiving Waters Name of each Receiving Water

45 Appendix B Example Receiving Water Map Coachella Valley Storm Water Channel Project Site Salton Sea is NOT listed! Limit to waters listed in SWMP Table 2 or Figure 2 Appendix B#-Tract Receiving Water Map 133 Appendix C Supporting Details Related to Hydrologic Conditions of Concern Include materials that support the HCOC findings documented in WQMP Section IV Calculations Engineering Studies Reports Drainage Study Report Detailed Drainage Study Field Reconnaissance Report Photographs Environmental Documentation Etc. 134 Appendix D Educational Materials Include water pollution control educational materials for educating Owners Operators Employees Residents, etc. Source Control BMP educational materials are to be included in this Appendix

46 Appendix E Soils Report Soils report must be included if infiltration BMPs are proposed Guidance The soils report must include appropriate testing to guide design Borings or exploration pits to document soil conditions below infiltration BMPs, and the presence of groundwater Infiltration tests to determine the steady-state infiltration rate of the soils. This usually requires Flooded Basin Tests Double Ring Infiltrometer Tests 136 Appendix F Site Design and Treatment Control BMP Sizing Calculations and Design Details Include calculations supporting the design of each Site Design and Treatment Control BMP Guidance The Worksheets in the Riverside County Whitewater River Region Stormwater Quality Best Management Practice Design Handbook provide an excellent means to document BMP design calculations 137 Appendix F BMP Design Volume Example Worksheet 1 Design Procedure Form for BMP Design Volume

47 VBMP Example 1 Identification Information BMP Tributary Area Calculate Impervious Area Ratio Calculate Runoff Coefficient Calculate Unit Storage Volume Calculate Design Storage Volume Note Space 139 VBMP Example 2 Identification Information BMP Tributary Area Calculate Impervious Area Ratio Calculate Runoff Coefficient Calculate Unit Storage Volume Calculate Design Storage Volume Note Space 140 Appendix F BMP Design Flow Example Worksheet 2 Design Procedure Form for Design Flow

48 QBMP Example 3 Identification Information BMP Tributary Area and Imperviousness Determine Runoff Coefficient Using Design Handbook Table 4 Determine Area of Each Hydrologic Soils Group Calculate Weighted Runoff Coefficient Calculate BMP Design Flow 142 QBMP Example 4 Identification Information BMP Tributary Area and Imperviousness Determine Runoff Coefficient Using Design Handbook Table 4 Determine Area of Each Hydrologic Soils Group Calculate Weighted Runoff Coefficient Calculate BMP Design Flow 143 QBMP and VBMP The Benefits of Implementing BMPs Example Design Criteria Example Design Criteria VBMP QBMP Example 1 Example 3 No Significant 2,378 ft 3 No Significant 0.41 ft 3 /s BMPs BMPs Example 2 Significant BMPs 872 ft 3 Example 4 Significant BMPs 0.20 ft 3 /s % Reduction 63% 51%

49 Appendix G Agreements Covenants, Codes, and Restrictions (CC&Rs) Covenant and Agreement and/or other mechanism for ensuring ongoing BMP O&M, funding, and transfer of requirements to future owners Include copies of Agreements in this appendix 145 Appendix H Phase I Environmental Assessment If Conducted Include the Summary of Site Remediation Conducted and Use Restrictions Guidance The Phase I may yield important information regarding legacy pollutants. Guidance The Phase I may indicate areas on site where certain BMPs may not be appropriate, for example, infiltration BMPs. 146 Appendix I Project Specific WQMP Summary Data Form Completed mostly by the Applicant, with some fields completed by the Agency Used by the Agency to track implementation ti of WQMPs and reporting to the Regional Water Quality Control Board

50 Appendix I Project Specific WQMP Summary Data Form Applicant Information Project Information Project Name Location Information Project Identifiers (e.g., Tract) Watershed Category WQMP Submittal Date Project Size Area Managed via Site Design BMPs Contact Information, etc. Agency Use 148 Summary Provides the framework for preparing a Project-Specific WQMP that will be protective of Receiving Waters and compliant with requirements for water quality control Is used in conjunction with the WQMP Guidance Stormwater Quality BMP Design Handbook Requires thoughtful contemplation and consideration of effective ways to integrate Site Design BMPs and Treatment Control BMPs into the project this will require new skills WQMPs may change the fundamental way we approach projects, but may not fundamentally change all projects Whitewater River Region projects historically subject to retention requirements are not expected to change significantly 149 WQMP Basic Training For Local Agency Staff Resources, WQMP Tracking, Questions and Answers Whitewater River Region Water Quality Management Plans For Urban Runoff 50

51 Today s Agenda Welcome and Training Process Stormwater/Urban Runoff Program Overview Water Quality Management Plans - Overview and Projects Requiring a WQMP Using the Water Quality Management Plan Template Cover Owner s Certification Contents I Project Description II Site Characterization III Pollutants of Concern IV Hydrologic Conditions of Concern V Best Management Practices VI Operation and Maintenance Responsibilities for BMPs VII Funding Appendices Resources, WQMP Tracking, Questions and Answers 151 Resources Useful References Handout 152 Tracking and Inspection Anytime a Project crosses the counter LOG IT IN! Require reporting forms be filled out by Public when submitting WQMPs for review

52 Tracking and Inspection Use County established Spreadsheet to maintain your Agency s database! Use for required Annual reporting for New Development and Redevelopment Projects 154 Tracking and Inspection Left side of spreadsheet is for logging in and tracking of WQMP submittals Includes: Project Name Location APN/Tract No Watershed Submittal or Approval Date 155 Tracking and Inspection Right side of spreadsheet is for tracking Project information Includes: Project tarea Pre/Post Impervious % On-site retention BMP Conditions O&M responsibilities Tracking your Agency information is very important!