Contractor Awareness Training Stormwater Facilities Introduction 2016

A Fairfax County, VA, publication

Department of Public Works and Environmental Services

Working for You!

Stormwater Maintenance Awareness TrainingFor privately maintained stormwater management facilities

Maintenance and Stormwater Management Division (MSMD)

Spring 2016

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Stormwater Maintenance Awareness Training

MSMD/DPWES

Course Objectives

• History of Stormwater Management (SWM) and regulations• Basic County inspection protocols for SWM facilities and Best

Management Practices (BMPs)– Includes review of the inspection report, information provided to a

private facility owner, and how to close an inspection• Common SWM/BMP facility types and their purpose/function• Typical SWM/BMP facility maintenance items (deficiencies)

– Items which prevent a facility from functioning as designed• Most common remedies for SWM/BMP facility deficiencies• Additional resources and references

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Course ScheduleAM session (includes two short breaks)

– History of SWM and regulations– County inspection basics– The inspection report and Maintenance Activity Report (MAR)– Common SWM/BMP facility types

• Common maintenance issues-General

– Common SWM/BMP facility types, deficiencies and remedies• Above Ground Facilities

12:00-1:00 PM Lunch

PM session (includes two short breaks)– Common SWM/BMP facility types, deficiencies and remedies

• Below Ground Facilities• Vegetative Practices

– Closing remarks/questionsNOTE: All pictures, unless noted, are the property of Fairfax County

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Participant Introductions

• Name• Employer• Current position• Experience with SWM/BMP facilities• Course expectations

*Important Reminders: • Please be sure to sign-in, as Certificates of Attendance and the

Contractor Listing will be generated from that sheet.• Common abbreviations and acronyms are noted at the end of the

Introduction section, for your reference.

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History of Stormwater Management

WHY DO THIS TRAINING?• Fairfax County conducts inspections on all privately owned

SWM/BMPs at least once every 5 years (750+/year).• Approximately 69% (3,900 of the 5,600) of SWM/BMP County

facilities are privately owned.– More than 80% of privately owned facilities required maintenance

(noted deficiencies) in the last inspection cycle.– Some owners lack a full understanding of

the maintenance requirements for their SWM/BMPs.

– Understanding the basic requirements & importance of timely maintenance/repairs serves everyone’s interest, supports public safety, & helps facilities function as designed.

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WHAT’S NEXT?

Fairfax County will compile a list of all attendees, and this list will be: – Posted on the County’s stormwater website as a public resource– Provided as an attachment with the final inspection report sent to each private

owner– Used to notify attendees of any future County training opportunities

So, let’s get started!Please note the following disclaimer will be on the County Contractor Listing: The companies and/or individuals listed below hold a Certificate of Attendance from the Fairfax County Maintenance and Stormwater Management Division’s Stormwater Maintenance Contractor Training Program. This training program is provided solely as a means for companies and/or individuals to be included on a contractor list and is not a requirement to perform maintenance on stormwater management facilities within Fairfax County. Fairfax County does not endorse or recommend any contractor or vendor and makes no representation or warranties regarding the qualifications or suitability of any particular contractor or vendor, nor does a contractor’s or vendor’s inclusion or non-inclusion on this list constitute any such representation or warranty. This list is provided solely as a service to our citizens and is not a representation that Fairfax County is in any way certifying the contractor’s or vendor’s qualifications and ability to perform specified stormwater maintenance improvements.

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Fairfax County Overview

• Washington, DC metropolitan area

• 400 square miles• 30 Watersheds

– Chesapeake Bay Watershed• 1.1 Million residents• Phase 1 MS4 Permittee

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A watershed is an area of land which drains into a specific water body (e.g., river, stream, or lake) due to the topography of an area

(i.e., the lay of the land).

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• The County Storm Drainage System is a network of public and private structures, channels, and underground pipes that carries stormwater runoff directly to local receiving waters.– SWM/BMPs are a vital tool in managing this runoff.

• Urbanization increases:– Non-point source pollution in stormwater run-off (a water quality issue)– Downstream flooding (a water quantity issue)

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When SWM/BMP facilities function as designed they help to manage:

• Water quality• Water quantity

– Timing – Distribution

Collection

Conveyance

Management

…interconnected…

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• Stormwater Management (SWM, BMP, or both):– SWM facilities provide water quantity management through:

• Reduction of downstream flooding via temporary storage• Quantity control of runoff from impervious areas (e.g., pavement,

sidewalks, etc.)• Aiding control of larger flood events (i.e., 2- and 10-year events)

– BMPs provide water quality management by temporary storage and via:• Settling• Infiltration (slow movement into ground)• Filtration (biological or mechanical separation)• Biological nutrient uptake

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Stormwater RegulationsFAIRFAX COUNTY REGULATIONS OF

INTEREST:

• Fairfax County Codified Ordinances– Chapter 124: Stormwater Ordinance

– Chapter 118: Chesapeake Bay Preservation Ordinance

Code amendments are listed in detail at http://www.fairfaxcounty.gov/dpwes/ stormwaterordinance.htm

OF SPECIAL NOTE:

• §124-2-10.3: All facilities should have access for maintenance and inspections.

• §118-3-3: Notes the restrictions for pruning and removing trees, “noxious weeds and dead, diseased, or dying trees or shrubbery", as well as noting specific vegetation replacement requirements

• §118-2-1e.7: Routine maintenance is allowed in Resource Protection and Chesapeake Bay Preservation Areas to ensure continued function per design.

http://www.fairfaxcounty.gov/dpwes/stormwaterordinance.htm



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INTEREST(Continued):

• Fairfax County Codified Ordinances– Chapter 112: Zoning Ordinance


OF SPECIAL NOTE:

• §112-13-300: Transitional Screening & Barriers

• §112-17-106: Required Information on Site Plans:– 26. All proffered conditions….– 30. Provisions for the adequate

disposition of natural and stormwater in accordance with Chapter 124.




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• Fairfax County Codified Ordinances– Chapter 104: Erosion and Sediment

(E&S) Control


OF SPECIAL NOTE:

• §104-1-8: Notes conservation standards and specifications for E&S controls for any land disturbing activities

• §104-1-2, 3, & 4: Approved Conservation/E&S plan required for regulated land disturbance activities of greater than 2,500 ft2




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• Fairfax County PFM– Chapter 12: Tree Conservation– Chapter 6: Storm Drainage

OF SPECIAL NOTE:

• §6-1306: Requirements for maintenance access, grading, etc.– §6-1310 to 6-1321: Design and

access requirements, by SWM/BMP type

• §6-1606.2G (impoundment areas and “likely sediment accumulation areas”)– Requires maintenance access and

20’ cleared access easement "from entrance along downstream side of embankment toe to the outlet channel"

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Stormwater Regulations

Fairfax County PFM• §6-1606-2A; §6-1318.3D; §6-1319.3D;

& §6-1320.3D (sediment forebays for SWM permanent pools, constructed WL, WP and DP, respectively)– Recommends “an onsite area

designated for sediment dewatering and disposal”

• VMRC, VDEQ, & the County may require permits for any land disturbance, dredging, and/or on-site disposal of dredge spoils.– Permits are often project specific

VMRC-Virginia Marine Resources CommissionVDEQ-Virginia Department of Environmental Quality

FAIRFAX COUNTY REGULATIONS/OF SPECIAL NOTE (Continued):

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Stormwater Regulations

• Useful contact references:– DPWES-MSMD-703.877.2800– Permits, Clearing and Grading-

703.324.1730– Permits, Special Exceptions-

703.324.1290– Permit Applications Center-

703.222.0801– VMRC Habitat permit-757.247.2252– VDEQ-800.698.4000

DPWES-Department of Public Works and Environmental ServicesMSMD-Maintenance and Stormwater Management

• Contractors do not need a special business disposal permit to haul dredge to a landfill.– Prior coordination is recommended

during the bid process to confirm acceptance and existence of any special requirements (e.g., hazardous material testing, etc.).

– County’s I-95 Landfill in Lorton may have areas for dewatering and potential reuse. (703.690.1703)

FAIRFAX COUNTY REGULATIONS/OF SPECIAL NOTE (Continued):

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Stormwater RegulationsSTATE REGULATIONS OF INTEREST:

• Virginia Pollutant Discharge Elimination System Permit Program (VPDES)-VDEQ

• Virginia Stormwater Management Program (VSMP) (§9VAC25-870)

• Virginia Chesapeake Bay Preservation Act (§9VAC25-830)

• VMRC Habitat Management Division regulations for subaqueous or bottomlands & tidal wetlands (§4 VAC 20-395-10 et seq., 4 VAC 20-400-10 et seq. and Subaqueous Guidelines)

• Virginia Department of Transportation:– (VDOT) Right-of-Way (ROW) Manual– Virginia Work Area Protection Manual– Procedural Memorandum (Supplemental

ROW Dedication)

OF SPECIAL NOTE:

• Per County Public Facility Manual §1-0602: Unless a more stringent County standard exists, use VDOT standards.

• VDOT permits may be required for temporary traffic control and includes post-construction utility work/ maintenance.

• As of 3/1/14, per VDOT website (N. VA Fairfax and Arlington Counties Permits), VDOT permits for minor sites with no impact to VDOT ROW or high traffic volumes may be waived, but you should still submit for permit review.

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Stormwater RegulationsFEDERAL REGULATIONS OF INTEREST:

• The Clean Water Act-primary law for protecting the Nation’s water quality and integrity

• National Pollutant Discharge Elimination System (NPDES) (§402)

• OSHA Confined Space Regulation (29 CFR 1910.146)

• US Army Corps of Engineers (USACE) Nationwide Permit (NWP) #43-Stormwater Management Facilities (77 FR 10184)

Of Special Note:

• Confined Space Certification and entry permits are REQUIRED to enter any applicable space.

• USACE permits are required for work in areas designated as wetlands .– Permits allow for proper maintenance

of authorized structures or fills.– Permits include proper discharges of

dredged or fill material into non-tidal waters of the United States.

– “Critical resource waters” may have additional special requirements.

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Fairfax County Inspections-Basic Overview

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Fairfax County Inspections- Basic OverviewPrivate Inspection Program’s 4 basic steps:

• Step 1– The County notifies the owner in advance of an inspection.– Inspectors prepare appropriate maps/documents (e.g., appropriate County

Inspection form for the SWM/BMP type, easement information, etc.).• Step 2

– Visual condition assessments (inspections) are conducted & facility components documented by photograph.

– Common maintenance items are recorded by relative severity on a field inspection form and any unusual items are noted.

Step 1Pre-Assessment

Research

Step 2Visual Condition

Assessment

Step 3Reporting & Tracking

Step 4Enforcement

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Fairfax County Inspections- Basic Overview• Step 3

– Inspection results are then verified, reviewed, and formatted in the office into a formal report provided to the owner.

– Owner responses are tracked in a County database, with checkpoints at specific dates from when the owner received the

inspection report and follow-up correspondence.• 45-days (deadline for maintenance completion/written response) • 90- & 135-days (responses are delinquent)• A completed/signed Maintenance Activity Report (MAR) MUST be received

to close the inspection file! NOTE: Inspections are only a “point in time” observation of the condition at a SWM/BMP facility.

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Fairfax County Inspections- Reports & Forms

• Within approximately thirty (30) days of a completed inspection, the County provides a Notice of Inspection (NOI) to the facility owner, which currently includes all available documents as follows:– Cover letter– Condition Assessment Report (CAR)– Photos with captions and an o orientation sketch– Maintenance Activity Report (MAR)– Private Maintenance Agreement (PMA), if applicable– Site Plans– Tax and GIS Maps– Maintenance Guidelines and “Owner’s Guide” Brochure

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Fairfax County Inspections-CAR

Examples of a CAR:

6

7

8

S0XXX/UG00XX

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Fairfax County Inspections- MAR/Owner Response• To ensure an adequate response, a fully completed MAR should

note the following:– Site ID and Facility ID, as noted on the

NOI and all inspection forms• Please make sure this is also noted in any

verbal/written correspondence.– Must address each maintenance

issue described in the CAR• Attach copies of photos, invoices,

contracts, proposals, and/or work plans to MAR.

– MAR form completed and signed

– A completed/signed MAR MUST be received to close the inspection file!

Here and on back of form

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Fairfax County Inspections- Owner Response

Please note:• Documenting the work requested and completed is very

important!• Regular updates on complex repairs/situations will not

stop letters or enforcement actions, but they will be noted and taken into consideration.• Relaying the above information via telephone does not

substitute for completion and return of the MAR form.• No extensions will be granted.• All work must be completed in order to have the facility

file closed.• E-mail address: [email protected]

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Fairfax County Inspections-Response Timeframes

• Step 4– If facility deficiencies are noted, the owners are requested to return a

fully completed MAR, upon maintenance completion and within 45 days.• If no response is submitted, owners receive 45- and 90-day follow-

up letters, as required.• After 135 days and no MAR received by DPWES, the file is then

forwarded for enforcement review and follow-up.• Non-compliance can face injunctions as well as civil/criminal

penalties, dependent upon the circumstances and severity of the violation.– Public health, safety, and welfare are priority concerns.

– If a fully completed MAR is received within the allowable timeframe, the file is closed until the next scheduled inspection.

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Common SWM/BMP Facility Types

• Above-Ground Facilities– Wet and Dry Ponds (WP, DP)– Infiltration Trenches (TR)– Wetlands (WL)– Permeable Pavement (PP)– Rooftop Detention (RT)

• Below Ground Facilities– Underground Detention (UG)– Sand Filters (SF)– Manufactured BMPs (MB)

• Proprietary• Non-proprietary

• Vegetative Practices– Bioretention (BR)– Tree Filters (TF)– Green Roof (GR)– Vegetative Swales (VS)

BR11% DP

14%

MB4%

RT12%

SF6%

TF5%

TR25%

UG14%

WP8%

BR

DP

FB

GR

MB

PL

PP

RF

RT

SF

TF

TR

UG

VS

WL

WP

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Common Maintenance Items-General

• Blockages– Restriction/obstruction of water flow

• Spalling/Cracks– Material (e.g., concrete, metal, etc.)

eroding, deteriorating, or becoming brittle

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• RCP Joint Issues

• Overgrown Vegetation– Overgrowth can compromise a facility’s accessibility,

function, and design (e.g., obstruct or alter water flow during storm events).

LEFT: Significant pipe separation and misalignment

BOTTOM: Overgrown inletGood

Misalignment

Separation

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• Encroachments– Objects which are not part of the original design, create potential

obstruction, and alter facility function are considered encroachments.– Evidence of human habitation in the

impoundment area or within the riser is also a safety issue.

• Graffiti– If graffiti is visible to the public, it

can be a potentialsecurity issue, as well as an eyesore.

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We will start Above Ground Facilities after a short

BREAK…

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Common Acronyms & Abbreviations• GENERAL

– MSMD – Maintenance and Stormwater Management Division

– DPWES – Department of Public Works and Environmental Services

– BMP – Best Management Practice (stormwater quality treatment)

– CAR – Condition Assessment Report

– LID – Low Impact Development

– MAR – Maintenance Activity Report

– NOI – Notice of Inspection

– NOV – Notice of Violation

– PMA – Private Maintenance Agreement

– PFM – Public Facilities Manual

– SWM – Stormwater Management (stormwater quantity treatment)

– GIS – Geographic Information System (a mapping software)

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Common Acronyms & AbbreviationsFacility Types and Components

• BR – Bioretention

• CI – Curb Inlet

• CMP – Corrugated Metal Pipe

• DI – Drop Inlet

• DP – Dry Pond

• D/S - Downstream

• ES – Emergency Spillway

• EW – End Wall

• FB – Forebay

• GR – Green Roof

• MB – Manufactured BMP

• MH – Manhole

• OS – Open Space

• PL – Parking Lot

• PP – Porous Pavement

(Note: If used in an NOI, they will be defined in report.)

• PSP – Principle Spillway Pipe

• RCP – Reinforced Concrete Pipe

• RT – Rooftop Detention

• SF – Sand Filter

• TF – Tree Filter

• TR – Infiltration Trench

• UG – Underground Detention

• U/S - Upstream

• VF – Vegetated Filter

• VS – Vegetated Swale

• WL – Wetland

• WP – Wet Pond

• YI – Yard Inlet

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Contractor Awareness Training Stormwater Facilities Introduction 2016