Operation & Maintenance Requirements: Tips for Keeping Your
Agency in Compliance Kristin Kerr, P.E., QSD EOA, Inc. New
Development Workshop May 22, 2013 Slide 2 Outline of Presentation
Permanent Stormwater Controls that Require O&M Verification
Inspections O&M Requirements in the Municipal Regional
Stormwater Permit The O&M Verification Inspection Plan Tools
for Conducting, Tracking and Reporting O&M Inspections For more
information Slide 3 Permanent Facilities that Require O&M
Inspections Provision C.3.h of the MRP requires agencies to conduct
inspections to verify operation & maintenance (O&M) of:
Stormwater treatment measures, and Hydromodification management
measures Slide 4 Stormwater Treatment Measures Low impact
development (LID) treatment systems (biotreatment, infiltration,
rainwater harvesting systems) Bioretention Area (biotreatment)
Slide 5 Stormwater Treatment Measures Vault-based systems
(hydrodynamic separators, media filters, proprietary tree well
filters) Media Filter Cartridge Hydrodynamic Separator Slide 6
Hydromodification Management (HM) Facilities Basin, tank, pipe, or
vault with specially designed outlet to slowly release water.
Detention basin with outlet structure Slide 7 O&M Requirements
(Provision C.3.h) Agencies subject to the MRP must: Require
facility owners to conduct ongoing maintenance (e.g., maintenance
agreement). Prepare and implement plan for annual O&M
verification inspections, including new installations. Conduct
O&M verification inspections; provide enforcement as needed.
Track and report on inspections. Slide 8 Model Maintenance
Agreement Requires property owner to assure ongoing operation and
maintenance Slide 9 What about Municipality- owned Facilities?
O&M inspection requirements do not distiguish between municipal
and non- municipal facilities. Inspect, track and report on
facilities that your municipality is responsible for maintaining.
Slide 10 O&M Verification Inspection Plan Each fiscal year,
inspect: All newly installed stormwater treatment and HM controls
within 45 days of installation 20% of the total number of installed
stormwater treatment and HM controls (when rounding, round up!) 20%
of all installed vault-based systems (round up) All installed
treatment and HM facilities must be inspected at least once every 5
years. Slide 11 Lessons Learned from NOVs Round up when calculating
20 % of treatment/HM facilities per year, AND when calculating 20 %
of vault systems. If your agency has fewer than 5 facilities, be
sure to inspect at least one per year. Annual Reporting year July 1
- June 30th Now is a good time to verify you have your inspections
completed Slide 12 Mosquito Abatement District Coordination List of
newly-installed facilities submitted each year: To Mosquito
Abatement District (MAD) Also to Regional Water Board Submitted
before October 1 Countywide Program makes the MAD submittal based
on info in your Annual Report Slide 13 Tools for Inspecting,
Tracking & Reporting O&M Verification Inspection Checklist
Annual Report O&M Inspection Table Each agency should have an
internal tracking table NOT submitted with Annual Report Can be
requested by Regional Board at any time Slide 14 O&M
Verification Checklist Slide 15 Annual Report Form C.3.h Reporting
Table Slide 16 Annual Report Form Name of facility/site inspected
Address If newly installed Party responsible for maintenance Date
of inspection Type of inspection (initial, annual, follow-up, spot)
Type of stormwater treatment/HM control Inspection findings/results
Enforcement actions taken Comments/Follow-up Slide 17 Data Tracking
Similar to AR Data Except Name of facility/site inspected Address
specific description of location of treatment/HM controls If newly
installed date of installation Party responsible for maintenance
Date of inspection Type of inspection (initial, annual, follow-up,
spot) Type of stormwater treatment/HM control type and size
Inspection findings/results Enforcement actions taken
Comments/Follow-up corrective actions Slide 18 For More Information
Countywide Program Password Protected ND page www.flowstobay.org
(click on Municipalities, then ND)www.flowstobay.org O&M
Verification Inspection Plan Template O&M Verification
Inspection Checklist Model maintenance agreement Municipal Regional
Stormwater Permit www.flowstobay.org (click on Municipalities, then
scroll to Municipal Stormwater Permit) www.flowstobay.org Slide 19
Common Issues in Inspections of Newly-Installed Treatment Measures
Purpose of inspection When to inspect What to look for during
inspection Common issues Checklist for 45-day inspection Slide 20
Purpose of Inspection Verify treatment measures and/or
hydromodification management controls are installed per approved
plans. At a minimum, inspect those components that are visible in
the finished condition. If possible, also inspect below grade
components during construction. Slide 21 When to Inspect Within 45
days of installation May conduct as part of overall final
inspection of constructed project May conduct during different
construction phases (e.g. inspect underground elements, i.e.
underdrain, while visible) Slide 22 Prepare for the Inspection
Review project plans to identify: The number of treatment measures
and/or HM systems to be installed on the site. The locations of
treatment measures and/or HM systems. The dimensions of treatment
measures and/or HM systems. Slide 23 Prepare for the Inspection
Review project plans to identify: How high flows will be
managed/diverted Locations of underdrains and cleanouts Type and
extent of plant cover Type of approved irrigation system In this
system, high flows will enter raised inlet. Slide 24 During the
Inspection Confirm that installation matches approved plans
regarding: Total number and type(s) of facilities Location of
facilities on the site Components and dimensions of facilities
Request confirmation from site superintendent that biotreatment
soil is per MRP specifications Slide 25 During the Inspection
Confirm that installation matches approved plans regarding: Type
and extent of plant cover Functional irrigation system (if
provided) High-flow bypass or overflow path Overflow drain designed
to keep out trash and debris. Slide 26 Common Issues Is there
exposed soil? Exposed soil should be covered with 2 of mulch,
except for area immediately surrounding tree trunks (roots need
air). Will vegetation block inlets to the treatment measure when
mature? Turf is blocking inlet; insufficient drop between pavement
and top of grade in planting area. Slide 27 Common Issues Is there
positive drainage to the treatment measures? Is there permanent
erosion control at points of concentrated flow? Cobbles reduce
erosion at entrance to bioretention area. Slide 28 Common Issues
Are plants healthy? Is there accumulation of sediment from
construction activity? Accumulated sediment must be removed. Slide
29 O&M Verification Checklist May be used for 45-Day
inspections; will have to use Comments section Slide 30 Questions?
Jill Bicknell, P.E. 408-720-8811 x1 [email protected] Kristin
Kerr, P.E., QSD 510.832.2852 x 122 [email protected]
