2018-146411 t DOC# 2018-0146411
Apr 12, 2018 03:29 PM
OFFICIAL RECORDS
Ernest J. Dronenburg, Jr.,
Recording Requested By: SAN DIEGO COUNTY RECORDER
FEES: $80.00 (S132 Atkins: $0.00)
City Engineer PAGES: 23
When Recorded Mail to:
City Clerk
City of Encinitas
505 South Vulcan Avenue
Encinitas, CA 92024
SPACE ABOVE FOR RECORDER'S USE
AGREEMENT FOR MAINTENANCE OF PRIVATE STORMWATER TREATMENT AND
STORMWATER POLLUTION CONTROL FACILITIES BY HOMEOWNER
APN: 264-101-27 Planning Case #: 09-054 ADR
Grading Plan: 11314- G
THIS AGREEMENT is between the City of Encinitas, a municipal corporation,
hereinafter referred to as the "City", and THE BRIDGES CLUB AT RANCHO SANTA
FE, INC., A CALIFORNIA NON-PROFIT MUTUAL BENEFIT CORPORATION, its heirs,
successors, and assigns, collectively hereinafter referred to as "Owner", owner(s) of
that certain real property, hereinafter referred to as "Property", that is described in
Exhibit "A" which is attached hereto and made a part hereof. This Agreement is for the
periodic Maintenance of certain private stormwater treatment and pollution control
facilities, hereinafter referred to collectively as "Stormwater Facilities". Stormwater
Facilities include but are not limited to Best Management Practices (BMPs), Integrated
Management Practices (IMPs), Low Impact Development (LID) features, Structural
stormwater treatment devices, and drainage facilities. The description and plat of
Stormwater Facilities is set forth in Exhibit "B" which is attached hereto and made a part
hereof.
WHEREAS, this Agreement is required by the City as a condition of approval of a
City permit pursuant to City of Encinitas Municipal Code Chapter 20.08 and Chapter
23.24 as well as the City of Encinitas Stormwater Manual; and
WHEREAS, the Stormwater Facilities benefit said Property and are used by
OWNER; and
WHEREAS, the Property benefits and uses the Stormwater Facilities, which are
described in Exhibit "B"; and
WHEREAS, it is the desire of the City and the responsibility of the Owner that
Maintenance of said Stormwater Facilities occur on a regular and periodic basis as
necessary to preserve the Storm Water Facilities in good-working order in accordance
g
with the minimum Maintenance requirements set forth in Exhibit "C" which is attached
hereto and made a part hereof and in accordance with the City of Encinitas Municipal
Code, the Encinitas Stormwater Manual, and other related City policies and
requirements; and
WHEREAS, it is the intention of the Owner and the City that this Agreement
constitute a covenant running with the land, binding upon each successive owner of all
or any portion of the Property into perpetuity.
NOW THEREFORE, IT IS HEREBY AGREED FOR VALUABLE
CONSIDERATION AS FOLLOWS:
1) This agreement establishes the Owner's maintenance requirements for the
Stormwater Facilities. The term "Maintenance" wherever capitalized in this
agreement shall include, but shall not be limited to: inspection for purposes of
identifying operational deficiencies in the Stormwater Facilities, routine upkeep and
repair of the Stormwater Facilities in proper working order as determined by the City,
and preparation and submittal of the annual inspection report to the City, all as set
forth in subparagraph 1.i) through 1.iii).
i) The Owner shall inspect the Stormwater Facilities after all major storms. In
addition, the Owner shall inspect the Stormwater Facilities at the minimum
frequency specified in Exhibit "C", but not less than twice per year.
ii) The Owner shall provide upkeep and repair to preserve the Stormwater
Facilities in good working order and shall repair all deficiencies identified in
the Owner's inspections no later than 30 days following the inspection or prior
to the next anticipated rain event. Interim water quality control measures shall
be utilized to protect damaged or deficient Stormwater Facilities during any
storm event until such time as the Facilities are restored to good working
order. The minimum upkeep and repair frequency shall be consistent with
the Exhibit "C" but not less than once per year. To the satisfaction of the
Director of Engineering Services, the Owner shall ensure that the Stormwater
Facilities are in proper working order for the rainy season, which starts on
October 1.
iii) The Owner shall obtain the City of Encinitas Stormwater Inspection Report
form from the City website or the City of Encinitas Civic Center, complete the
inspection report form, and submit the inspection report to the City of
Encinitas Department of Engineering Services. Prior to the submittal of the
inspection report to the City, the Owner shall perform an inspection of the
Stormwater Facilities, identify deficiencies, and repair and correct all
deficiencies. The inspection report shall be submitted to the City once a year
between August 1 and September 30.
2) The Property is benefited by this Agreement, and it is the purpose of the signatories
hereto that this instrument be recorded to the end and intent that the obligation
hereby created shall be and constitute a covenant running with the land. Any heirs,
executors, administrators, assignees, and/or successors in interest to all or any
portion of the Property, by acceptance of delivery of a deed and/or conveyance
regardless of form, shall be deemed to have consented to and become expressly
bound by these presents, including without limitation, the right of any person entitled
to enforce the terms of this Agreement to institute legal action as provided in
Paragraph 12 hereof, such remedy to be cumulative and in addition to other
remedies provided in this Agreement and to all other remedies at law or in equity.
3) The Stormwater Facilities shall be constructed by and have Maintenance performed
by the Owner in accordance with the terms and conditions of this agreement and the
plans and specifications identified in approved Grading Plan Number 11314-G which
is on file as a permanent public record in the City of Encinitas.
4) The cost and expense of Maintenance of the Stormwater Facilities shall be paid by
the Owner.
5) In the event the Property is subdivided in the future, the owners, heirs, assigns, and
successors in interest of each such newly created parcel(s) shall be liable under this
Agreement for their then pro rata share of expenses reflecting such newly created
parcels.
6) The Maintenance to be performed under this Agreement shall include upkeep,
repair, and improvements to adequately ensure the Stormwater Facilities are in
proper working order as determined by the City. Upkeep, repair, and improvements
under this Agreement shall include, but are not limited to, repairing access
roadbeds; repairing, preserving, and providing improvement for the upkeep of
drainage structures; removing debris, sediment, oil, grease, and other pollutants as
determined by the City; perpetually preserving adequate groundcover and/or other
erosion control measures within the Property in order to prevent erosion; and the
management of materials, pollutants, and hazardous waste to prevent pollution of
the stormwater system or Municipal Separate Stormwater Sewer System (MS4) as
referenced in local and State codes. Upkeep, repair, and improvement shall also
include other work necessary to repair and preserve the Stormwater Facilities for
their intended purposes as well as the restoration of the Stormwater Facilities
following any non-permitted modification. The restoration shall be as required to
restore the Stormwater Facilities to the condition existing prior to damage or
alteration.
7) Any liability of the Owner for personal injury to any worker employed to provide
Maintenance under this Agreement, or to third persons, as well as any liability of the
Owner for damage to the property of any third persons, as a result of or arising out
of Maintenance under this Agreement, shall be borne by the Owner.
8) Owner shall jointly and severally defend, indemnify, and hold harmless the City,
City's engineer, its consultants, and each of its officials, directors, officers, agents,
and employees from and against all liability, claims, damages, losses, expenses,
personal injury, and other costs, including costs of defense and attorney's fees, to
any contractor, any subcontractor, any user of the Stormwater Facilities, or to any
other third persons arising out of or in any way related to the use, Maintenance, or
the failure to provide Maintenance for the Stormwater Facilities. This Agreement
imposes no liability of any kind whatsoever on the City and the Owner agrees to
hold the City harmless from any liability in the event the Stormwater Facilities fail to
operate properly.
9) Nothing in this Agreement, the specifications, other contract documents, the City's
approval of the plans and specifications, or the City's inspection of the work
constitutes an acknowledgement of any City responsibility for any such item or the
material contained therein, and the City, City's engineer, its consultants, and each of
its officials, directors, officers, employees and agents, shall have no responsibility or
liability therefore.
10)The Owner shall provide access to the Stormwater Facilities within the Property to
City's inspectors, employees, agents, and contractors within 48 hours of receipt of a
written notification by the City. The access shall be provided unconditionally and
without any obstruction, interference, or hazard. Any animals kept on the Property
shall be secured outside of the area subject to the City's inspection.
11)The Owner hereby grants permission to the City, its authorized agents, and its
employees, to enter upon the Property and to inspect the Stormwater Facilities
following a 48 hour notice whenever the City deems necessary. The purpose of
inspection is to evaluate the condition and performance of the Stormwater Facilities,
to follow-up on reported deficiencies, to respond to citizen complaints, and/or to
comply with State and City requirements for City inspection of such facilities. The
City shall provide the Owner with copies of the inspection findings and a directive to
commence with any repairs deemed necessary.
12)ln the event the Owner fails to maintain the Stormwater Facilities in good working
condition as determined by the City Engineer, the City, its agents, employees, or its
contractors, may enter upon the Property and take the steps deemed necessary to
correct deficiencies and shall charge the costs of such repairs to the Owner. In the
event the City pursuant to this Agreement, performs work of any nature, or expends
any funds for attorney's fees, administrative costs, contractors, employees,
consultants, materials, or other costs in the performance of said work, the Owner
shall reimburse the City in full. Such reimbursement shall be due within thirty (30)
days of receipt of a notification for all costs incurred by the City, including any
administrative costs and attorney's fees. If said funds are not paid by Owner within
(30) days, City reserves the right to take legal action for cost recovery and to file with
the County Recorder of San Diego County an assessment lien on the Property. It is
expressly understood and agreed that the City is under no obligation to maintain or
repair said Stormwater Facilities, and in no event shall this Agreement be construed
to impose any such obligation on the City.
13)The terms of this Agreement may be amended in writing following Owner's request
and upon written approval by the City Engineer.
14)This Agreement shall be governed by the laws of the State of California. In the
event that any of the provisions of this Agreement are held to be unenforceable or
invalid by any court of competent jurisdiction, the validity, and enforceability of the
remaining provisions shall not be affected thereby.
IN WITNESS HEREOF, the parties have executed this Agreement.
Authorized Signatory:
Ger d F. Douglas, President Date
The Bridges Club at Rancho Santa Fe, Inc.
Signature of OWNER must be notarized. Attach the appropriate acknowledgement.
CITY OF ENCINITAS:
Christopher L. agdosku D to
City Engineer
Development Services Department
CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT CIVIL CODE § 1189
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the
document to which this certificate is attached,and not the truthfulness,accuracy,or validity of that document.
State of California )
County ofQ
On �° — I� before me,
Date Here Insert Name a d 1tle of the O icer
personally appeared 1 L• A V,t c)
Name(s) of Sign&4
who proved to me on the basis of satisfactory evidence to bet erson(s) whose name(s) is are
ptit�scribed to the within instrument and acknChis/,he ged to me tha Wshe/they executed the same in
his er/their authorized capacity(ies),and that b r/their signature(s)on the instrument the person(s),
or the entity upon behalf of which the person(s) d, execute d the instrument.
I certify under PENALTY OF PERJURY under the laws
z, of the State of California that the foregoing paragraph
�,r►t°+►tip ANGELA A. SIMON is true and correct.
comm.*2182396 WITNESS my hand and official seal.
N NOS SAN DIEGO CpUti�Tf�'�
Grub' Yr�WfY.Exa.Yut.2,2021
Signature
ignature of Notary Public
Place Notary Seal Above
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Description of Attached Document
Title or Type of Document:
Document Date: Number of Pages:
Signer(s) Other Than Named Above:
Capacity(ies) Claimed by Signer(s)
Signer's Name: Signer's Name:
❑ Corporate Officer — Title(s): ❑ Corporate Officer — Title(s):
❑ Partner — ❑ Limited ❑ General ❑ Partner — ❑ Limited ❑ General
❑ Individual ❑Attorney in Fact ❑ Individual ❑Attorney in Fact
❑Trustee ❑Guardian or Conservator ❑Trustee ❑Guardian or Conservator
❑ Other: ❑ Other:
Signer Is Representing: Signer Is Representing:
02016 National Notary Association •www.NationalNotary.org • 1-800-US NOTARY(1-800-876-6827) Item#5907
CALIFORNIA ALL-PURPOSE ACKNOWLEDGMENT CIVIL CODE§ 1189
A notary public or other officer completing this certificate verifies only the identity of the individual who signed the
document to which this certificate is attached,and not the truthfulness,accuracy,or validity of that document.
State of California )
County of '7a n Sly e56 )
On(?pr�TQ before me, LAN) ,
Date Here Insert Name and Title o the Officer
personally appeared _ �'12t��;1 17. V]bUO)e-C
Name(s) of Signer(s)
who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are
subscribed to the within instrument and acknowledged to me that he/she/they executed the same in
his/her/their authorized capacity(ies),and that by his/her/their signature(s)on the instrument the person(s),
or the entity upon behalf of which the person(s) acted, executed the instrument.
I certify under PENALTY OF PERJURY under the laws
of the State of California that the foregoing paragraph
is true and correct.
WITNESS my hand and official seal.
MAGGIE JUEL
NotaryPublic-California z
San Diego County D Signature Cg,&Z/ 9
Commission k 2211453 Si_ ature of Notary Public
My Comm.Expires Sep 22,2021
Place Notary Seal Above
OPTIONAL
Though this section is optional, completing this information can deter alteration of the document or
fraudulent reattachment of this form to an unintended document.
Description of Attached Document
Title or Type of Document:
Document Date: Number of Pages:
Signer(s) Other Than Named Above:
Capacity(ies) Claimed by Signer(s)
Signer's Name: Signer's Name:
❑ Corporate Officer — Title(s): ❑Corporate Officer — Title(s):
❑ Partner — ❑ Limited ❑ General ❑ Partner — ❑ Limited ❑General
❑ Individual ❑Attorney in Fact ❑ Individual ❑Attorney in Fact
❑Trustee ❑Guardian or Conservator ❑Trustee ❑Guardian or Conservator
❑Other: ❑ Other:
Signer Is Representing: Signer Is Representing:
02016 National Notary Association •www.NationalNotary.org • 1-800-US NOTARY(1-800-876-6827) Item#5907
EXHIBIT "A"
Legal Description of Property
APN: 264-101-27
THAT PORTION OF PARCEL "A" OF CERTIFICATE OF COMPLIANCE B/C00-0260, IN THE
COUNTY OF SAN DIEGO, STATE OF CALIFORNIA, RECORDED APRIL 11, 2003, AS
DOCUMENT NO. 2003-0412924, OF OFFICIAL RECORDS, BEING LOT 215 OF COUNTY OF
SAN DIEGO TRACT NO. 4569-6, ACCORDING TO MAP THEREOF NO. 13887, IN THE
COUNTY OF SAN DIEGO, STATE OF CALIFORNIA, FILED IN THE OFFICE OF THE
COUNTY RECORDER OF SAN DIEGO COUNTY, DECEMBER 8, 1999, AS ADJUSTED BY
CERTIFICATES OF COMPLIANCE B/C00-0131, RECORDED OCTOBER 27, 2000, AS
DOCUMENT NO. 2000-0583082, B/C00-193, RECORDED JUNE 1, 2001, AS DOCUMENT
NO. 2001-0359313, B/CO1-0137, RECORDED SEPTEMBER 21, 2001, AS DOCUMENT NO.
2001-0680272, AND BC03-0250, RECORDED MAY 22, 2008, AS DOCUMENT NO. 2008-
0276786, ALL OF OFFICIAL RECORDS., MORE PARTICULARLY DESCRIBED AS
FOLLOWS:
BEGINNING AT THE SOUTHEASTERLY CORNER OF THE EAST HALF OF THE
SOUTHWEST QUARTER OF THE NORTHWEST QUARTER OF SECTION 9; THENCE
ALONG THE SOUTHERLY LINE THEREOF NORTH 89 058'14" WEST, 663.66 FEET TO THE
WESTERLY LINE OF SAID EAST HALF; THENCE ALONG SAID WESTERLY LINE NORTH
01 025'43" EAST, 20.01 FEET TO A LINE RUNNING PARALLEL WITH AND DISTANT 20.00
FEET NORTHERLY OF THE SOUTHERLY LINE OF SAID EAST HALF OF THE
SOUTHWEST QUARTER OF THE NORTHWEST QUARTER OF SAID SECTION 9; THENCE
ALONG SAID LINE SOUTH 89 058'14" EAST, 663.61 FEET TO THE EASTERLY LINE OF
SAID EAST HALF; THENCE ALONG SAID EASTERLY LINE SOUTH 01 017'14" WEST, 20.00
FEET TO THE POINT OF BEGINNING.
EXHIBIT "B"
Description and Plat of Stormwater Facilities
— — PRdYATE ROAD
— —_— — — _ BUMANN ROAD
I
I
i
28fi,7' 286.4'
I
i
I
20.0'
STORE{ WATER
SCALE. 1" = 100' MAINTENANCE AREA
N
0 100 209
55.6'
—. L=58.5' 1
5}1
15.5'
36.5 =30.3'
264--101--31 EX. 28' WIDE
THE BRIDGES CLUB AT i" 5.6' J GOLF COURSE ACCESS
RANCHO SANTA FE — I AND UTILITY EASEMENT
EXHIBIT `C'
Minimum Maintenance Requirements for Stormwater Facilities
(Frequency and Procedures)
(this page intentionally left blank, see following pages)
INF-1 Infiltration Basin
Conceptual Design and Sizing Approach for Storm Water Pollutant Treatment and Flow'Control
Control of flow rates and/or durations will typically require significant surface ponding volume, and
therefore the following steps should be taken prior to determination of storm water pollutant
control design. Pre-development and allowable post-project flow rates and durations should be
determined as discussed in Chapter 6 of the manual.
1. Verify that siting and design criteria have been met, including placement and basin area
requirements, forebay volume,and maximum slopes for basin sides and bottom.
2. Iteratively determine the surface ponding required to provide infiltration storage to reduce
flow rates and durations to allowable limits while adhering to the maximum 36-hour
drawdown time. Flow rates and durations can be controlled using flow splitters that route
the appropriate inflow amounts to the infiltration basin and bypass excess flows to the
downstream storm drain system or discharge point.
3. If an infiltration basin cannot fully provide the flow rate and duration control required by
this manual, an upstream or downstream structure with appropriate storage volume such as
an underground vault can be used to provide additional control.
4. After the infiltration basin has been designed to meet flow control requirements, calculations
must be completed to verify if storm water pollutant control requirements to treat the DCV
have been met.
Maintenance Overview
Normal Expected Maintenance. Infiltration basins require routine maintenance to: remove
accumulated materials such as sediment, trash or debris from the forebay and the basin; maintain
vegetation health if the BMP includes vegetation; and maintain integrity of side slopes,inlets, energy
dissipators, and outlets. A summary table of standard inspection and maintenance indicators is
provided within this Fact Sheet.
Non-Standard Maintenance or BMP Failure. If any of the following scenarios are observed, the
BMP is not performing as intended to protect downstream waterways from pollution and/or
erosion. Corrective maintenance, increased inspection and maintenance, BMP replacement, or a
different BMP type will be required.
• The BMP is not drained between storm events. Surface ponding longer than approximately
24 hours following a storm event may be detrimental to vegetation health, and surface or
subsurface ponding longer than approximately 96 hours following a storm event poses a risk
of vector (mosquito) breeding. Poor drainage can result from clogging of the underlying
native soils, or clogging of covers applied at the basin surface such as topsoil,mulch, or rock
layer. The specific cause of the drainage issue must be determined and corrected. For
surface-level basins (i.e., not underground infiltration galleries), surface cover materials can
be removed and replaced, and/or native soils can be scarified or tilled to help reestablish
E-71 January 2018
INF-1 Infiltration Basin
infiltration. If it is determined that the underlying native soils have been compacted or do
not have the infiltration capacity expected, or if the infiltration surface area is not accessible
(e.g., an underground infiltration gallery) the [City Engineer] shall be contacted prior to any
additional repairs or reconstruction.
• Sediment, trash, or debris accumulation has filled the forebay or other pretreatment device
within one month, or if no forebay or other pretreatment device is present, has filled greater
than 25% of the surface ponding volume within one maintenance cycle. This means the load
from the tributary drainage area is too high, reducing BMP function or clogging the BMP.
This would require adding a forebay or other pretreatment measures within the tributary area
draining to the BMP to intercept the materials if no pretreatment component is present, or
increased maintenance frequency for an existing forebay or other pretreatment device.
Pretreatment components, especially for sediment, will extend the life of the infiltration
basin.
• Erosion due to concentrated storm water runoff flow that is not readily corrected by adding
erosion control blankets, adding stone at flow entry points, or minor re-grading to restore
proper drainage according to the original plan. If the issue is not corrected by restoring the
BVIP to the original plan and grade, the [City Engineer] shall be contacted prior to any
additional repairs or reconstruction.
Other Special Considerations. If the infiltration basin is vegetated:Vegetated structural BMPs that
are constructed in the vicinity of, or connected to, an existing jurisdictional water or wetland could
inadvertently result in creation of expanded waters or wetlands. As such,vegetated structural BMPs
have the potential to come under the jurisdiction of the United States Army Corps of Engineers,
SDRWQCB, California Department of Fish and Wildlife, or the United States Fish and Wildlife
Service. This could result in the need for specific resource agency permits and costly mitigation to
perform maintenance of the structural BMP. Along with proper placement of a structural BMP,
routine maintenance is key to preventing this scenario.
Sediment Loading. Consider the effects of BMP design and tributary area land uses on the
clogging potential of the BMP. Complete the sediment loading analysis included in Appendix E.27.
E-72 January 2018
INF-1 Infiltration Basin
,Summary of Standard Inspection and Maintenance
The property owner is responsible to ensure inspection, operation and maintenance of permanent BMPs on their property unless
responsibility has been formally transferred to an agency, community facilities district, homeowners association, property owners
association, or other special district.
Maintenance frequencies listed in this table are average/typical frequencies. Actual maintenance needs are site-specific, and maintenance
may be required more frequently. Maintenance must be performed whenever needed, based on maintenance indicators presented in this
table. The BMP owner is responsible for conducting regular inspections to see when maintenance is needed based on the maintenance
indicators. During the first year of operation of a structural BMP, inspection is recommended at least once prior to August 31 and then
monthly from September through May. Inspection during a storm event is also recommended. After the initial period of frequent
inspections, the minimum inspection and maintenance frequency can be determined based on the results of the first year inspections.
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Accumulation of sediment,litter, or debris Remove and properly dispose of •Inspect monthly. If the forebay is 25%
in forebay and/or basin accumulated materials, (without damage to full* or more in one month,increase
vegetation when applicable). inspection frequency to monthly plus after
every 0.1-inch or larger storm event.
•Remove any accumulated materials found
within the infiltration area at each
inspection.
•When the BMP includes a forebay,
materials must be removed from the
forebay when the forebay is 25% full*, or
if accumulation within the forebay blocks
flow to the infiltration area.
Obstructed inlet or outlet structure Clear blockage. •Inspect monthly and after every 0.5-inch
or larger storm event.
•Remove any accumulated materials found
at each inspection.
E-73 January 2018
INF-1 Infiltration Basin
n .. .. (when .. g Insect
Poor vegetation establishment when the Re-seed re-plant, or re-establish vegetation p
• monthly.
BMP includes vegetated surface by design) per original plans. •Maintain when needed.
Dead or diseased vegetation (when the BMP Remove dead or diseased vegetation,re- •Inspect monthly.
includes vegetated surface by design) seed,re-plant, or re-establish vegetation per •Maintain when needed.
original plans.
Overgrown vegetation (when the BMP Mow or trim as appropriate. •Inspect monthly.
includes vegetated surface by design) •Maintain when.needed.
Erosion due to concentrated irrigation flow Repair/re-seed/re-plant eroded areas and •Inspect monthly.
adjust the irrigation system. •Maintain when needed.
Erosion due to concentrated storm water Repair/re-seed/re-plant eroded areas, and •Inspect after every 0.5-inch or larger storm
runoff flow make appropriate corrective measures such event. If erosion due to storm water flow
as adding erosion control blankets,adding has been observed,increase inspection
stone at flow entry points, or minor re- frequency to after every 0.1-inch or larger
grading to restore proper drainage according storm event.
to the original plan. If the issue is not •Maintain when needed. If the issue is not
corrected by restoring the BMP to the corrected by restoring the BMP to the
original plan and grade,the [City Engineer] original plan and grade, the [City Engineer]
shall be contacted prior to any additional shall be contacted prior to any additional
repairs or reconstruction. repairs or reconstruction.
E-74 January 2018
INF-1 Infiltration Basin
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Standing water in infiltration basin without Make appropriate corrective measures such •Inspect monthly and after every 0.5 inch
subsurface infiltration gallery for longer than as adjusting irrigation system,removing or larger storm event. If standing water is
24-96 hours following a storm event obstructions of debris or invasive observed,increase inspection frequency to
vegetation, or removing/replacing clogged after every 0.1-inch or larger storm event.
or compacted surface treatments and/or •Maintain when needed.
scarifying or tilling native soils. Always
remove deposited sediments before
scarification,and use a hand-guided rotary
tiller. If it is determined that the underlying
native soils have been compacted or do not
have the infiltration capacity expected, the
[City Engineer] shall be contacted prior to
any additional repairs or reconstruction.
E-75 January 2018
INF-1 Infiltration Basin
• !t y 9..1 a�*® .. ,,a�J.� x �„? `M1$. �ti4 r 4011 . sar li(ri�y3 � '3?' ',�'.. 9 1
Standing water in subsurface infiltration This condition requires investigation of why •Inspect monthly and after every 0.5-inch
gallery for longer than 24-96 hours infiltration is not occurring. If feasible, or larger storm event. If standing water is
following a storm event corrective action shall be taken to restore observed,increase inspection frequency to
infiltration (e.g., flush fine sediment or after every 0.1-inch or larger storm event.
remove and replace clogged soils). BMP may
require retrofit if infiltration cannot be Maintain when needed.
restored.The [City Engineer] shall be
contacted prior to any repairs or
reconstruction.
E-76 January 2018
INF-1 Infiltration Basin
" 170,+. 'gip.
Presence of mosquitos/larvae If mosquitos/larvae are observed: first, •Inspect monthly and after every 0.5-inch
immediately remove any standing water by or larger storm event. If mosquitos are
For images of egg rafts,larva,pupa,and dispersing to nearby landscaping; second, observed,increase inspection frequency to
adult mosquitos,see make corrective measures as applicable to after every 0.1-inch or larger storm event.
http://www.mosquito.org/biology restore BMP drainage to prevent standing *Maintain when needed
water. For subsurface infiltration galleries,
ensure access covers are tight fitting,with
gaps or holes no greater than 1/16 inch,
and/or install barriers such as inserts or
screens that prevent mosquito access to the
subsurface storage.
If mosquitos persist following corrective
measures to remove standing water, or if the
BMP design does not meet the 96-hour
drawdown criteria because the underlying
native soils have been compacted or do not
have the infiltration capacity expected, the
[City Engineer] shall be contacted to
determine a solution.A different BMP type,
or a Vector Management Plan prepared with
concurrence from the County of San Diego
Department of Environmental Health,may
be required.
Damage to structural components such as Repair or replace as applicable. •Inspect annually.
weirs,inlet or outlet structures •Maintain when needed.
"25%full"is defined as'A of the depth from the design bottom elevation to the crest of the outflow structure(e.g.,if the height to the outflow opening is 12 inches from the bottom
elevation,then the materials must be removed when there is 3 inches of accumulation—this should be marked on the outflow structure).
E-77 January 2018
SD-D Permeable Pavement (Site Design BMP)
traditional pavements,including roadways, parking lots, emergency access lanes, sidewalks, trails and
driveways.
Conceptual Design and Sizing Approach for Site Design
1. Determine the areas where permeable pavements can be used in the site design to replace
conventional pavements to reduce the DCV. These areas can be credited toward reducing
runoff generated through representation in storm water calculations as pervious, not
impervious,areas but are not credited for storm water pollutant control.
2. Calculate the DCV per Appendix B.2, taking into account reduced runoff from permeable
Pavement areas.
Maintenance Overview
Normal Expected Maintenance. Routine maintenance of permeable pavement includes: removal
of materials such as trash and debris accumulated on the paving surface; vacuuming of the paving
surface to prevent clogging; and flushing paving and subsurface gravel to remove fine sediment. If
the BMP includes underdrains, check and clear underdrains.A summary table of standard inspection
and maintenance indicators is provided within this Fact Sheet.
Non-Standard Maintenance or BMP Failure. If the permeable pavement area is not drained
between storm events, or if runoff sheet flows across the permeable pavement area and flows off
the permeable pavement area during storm events, the BMP is not performing as intended to
protect downstream waterways from pollution and/or erosion. During storm events up to the 85th
percentile storm event (approximately 0.5 to 1 inch of rainfall in San Diego County), runoff should
not flow off the permeable pavement area. The permeable pavement area is expected to have
adequate hydraulic conductivity and storage such that rainfall landing on the permeable pavement
and runoff from the surrounding drainage area will go directly into the pavement without ponding
or overflow (in properly designed systems, the surrounding drainage area is not more than half as
large as the permeable pavement area). Following the storm event, there should be no standing
water (puddles) on the permeable pavement area.
If storm water is flowing off the permeable pavement during a storm event, or if there is standing
water on the permeable pavement surface following a storm event, this is an indicator of clogging
somewhere within the system. Poor drainage can result from clogging of the permeable surface
layer, any of the subsurface components, or the subgrade soils. The specific cause of the drainage
issue must be determined and corrected. Surface or subsurface ponding longer than approximately
96 hours following a storm event poses a risk of vector (mosquito) breeding. Corrective
maintenance,increased inspection and maintenance,BMP replacement, or a different BMP type will
be required. If poor drainage persists after flushing of the paving, subsurface gravel, and/or
underdrain(s) when applicable, or if it is determined that the underlying soils do not have the
infiltration capacity expected, the [City Engineer] shall be contacted prior to any additional repairs or
reconstruction.
E-47 January 2018
SD-D Permeable Pavement(Site Design BMP)
Other Special Considerations. Site design BMPs, such as permeable pavement, installed within a
new development or redevelopment project are components of an overall storm water management
strategy for the project. The presence of site design BMPs within a project is usually a factor in the
determination of the amount of runoff to be managed with structural BMPs (i.e., the amount of
runoff expected to reach downstream retention or biofiltration basins that process storm water
runoff from the project as a whole). When site design BMPs are not maintained or are removed, this
can lead to clogging or failure of downstream structural BMPs due to greater delivery of runoff and
pollutants than intended for the structural BMP. Therefore, the [City Engineer] may require
confirmation of maintenance of site design BMPs as part of their structural BMP maintenance
documentation requirements. Site design BMPs that have been installed as part of the project should
not be removed,not should they be bypassed by re-routing roof drains or re-grading surfaces within
the project. If changes are necessary, consult the [City Engineer] to determine requirements.
The runoff storage and infiltration surface area in this BMP are not readily accessible because they
are subsurface. This means that clogging and poor drainage are not easily corrected. If the tributary
area draining to the BMP includes unpaved areas, the sediment load from the tributary drainage area
can be too high,reducing BMP function or clogging the BMP.All unpaved areas within the tributary
drainage area should be stabilized with vegetation. Other pretreatment components to prevent
transport of sediment to the paving surface, such as grass buffer strips, will extend the life of the
subsurface components and infiltration surface. Along with proper stabilization measures and
pretreatment within the tributary area, routine maintenance, including preventive
vacuum/regenerative air street sweeping, is key to preventing clogging.
E-48 January 2018
SD-D Permeable Pavement(Site Design BMP)
Summary of Standard Inspection and Maintenance
The property owner is responsible to ensure inspection, operation and maintenance of permanent BMPs on their property unless
responsibility has been formally transferred to an agency, community facilities district, homeowners association, property owners
association, or other special district.
Maintenance frequencies listed in this table are average/typical frequencies. Actual maintenance needs are site-specific, and maintenance
may be required more frequently. Maintenance must be performed whenever needed, based on maintenance indicators presented in this
table. The BMP owner is responsible for conducting regular inspections to see when maintenance is needed based on the maintenance
indicators. During the first year of operation of a structural BMP, inspection is recommended at least once prior to August 31 and then
monthly from September through May. Inspection during a storm event is also recommended. After the initial period of frequent
inspections, the minimum inspection and maintenance frequency can be determined based on the results of the first year inspections.
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Preventive vacuum/regenerative air street Pavement should be swept with a vacuum •Schedule/perform this preventive action at
sweeping power or regenerative air street sweeper to least twice per year.
maintain infiltration through paving surface
Accumulation of sediment,litter, or debris Remove and properly dispose of •Inspect monthly and after every 0.5-inch
on permeable pavement surface accumulated materials. Inspect tributary area or larger storm event.
for exposed soil or other sources of a Remove any accumulated materials found
sediment and apply stabilization measures to at each inspection.
sediment source areas.Apply source control
measures as applicable to sources of litter or
debris.
E-49 January 2018
SD-D Permeable Pavement(Site Design BMP)
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Weeds growing on/through the permeable Remove weeds and add features as •Inspect monthly.
pavement surface necessary to prevent weed intrusion. Use •Remove any weeds found at each
non-chemical methods (e.g.,instead of inspection.
pesticides, control weeds using mechanical
removal, physical barriers, and/or physical
changes in the surrounding area ad)acent to
pavement that will preclude weed intrusion
into the pavement).
Standing water in permeable paving area This condition requires investigation of why •Inspect monthly and after every 0.5-inch
following a storm event, or runoff is infiltration is not occurring. If feasible, or larger storm event. If standing water is
observed overflowing off the permeable corrective action shall be taken to restore observed,increase inspection frequency to
paving surface during a storm event infiltration (e.g.,pavement should be swept after every 0.1-inch or larger storm event.
with a vacuum power or regenerative air •Maintain when needed.
street sweeper to restore infiltration rates,
clear underdrains if underdrains are present).
BMP may require retrofit if infiltration
cannot be restored. The [City Engineer]
shall be contacted prior to any repairs or
reconstruction.
E-50 January 2018
SD-D Permeable Pavement (Site Design BMP)
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Presence of mosquitos/larvae If mosquitos/larvae are observed: first, •Inspect monthly and after every 0.5-inch
immediately remove any standing water by or larger storm event. If mosquitos are
For images of egg rafts,larva, pupa,and dispersing to nearby landscaping; second, observed,increase inspection frequency to
adult mosquitos,see make corrective measures as applicable to after every 0.1-inch or larger storm event.
http://www.mosquito.org/biology restore BMP drainage to prevent standing •Maintain when needed.
water.
If mosquitos persist following corrective
measures to remove standing water, or if the
BMP design does not meet the 96-hour
drawdown criteria because the underlying
soils do not have the infiltration capacity
expected, the [City Engineer] shall be
contacted to determine a solution. A
different BMP type, or a Vector
Management Plan prepared with
concurrence from the County of San Diego
Department of Environmental Health,may
be required.
Damage to permeable paving surface (e.g., Repair or replace damaged surface as •Inspect annually.
cracks, settlement,misaligned paver blocks, appropriate. •Maintain when needed.
void spaces between paver blocks need fill
materials replenished)
E-51 January 2018