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2019-255285 DOC# 2019-0255285 111111 IIIII IIIII IIIII IIII 111111 IIIII IIIII IIIII IIIII IIIII IIIII IIII IIII Jun 28, 2019 08:35 AM OFFICIAL RECORDS Recording Requested By: Ernest J. Dronenburg, Jr., SAN DIEGO COUNTY RECORDER City Engineer FEES: $0.00 (S132 Atkins: $0.00) PAGES: 15 When Recorded Mail to: City Clerk City of Encinitas 505 South Vulcan Avenue Encinitas, CA 92024 SPACE ABOVE FOR RECORDER'S USE MAINTENANCE AGREEMENT FOR PRIVATE STORMWATER TREATMENT AND STORMWATER POLLUTION CONTROL AND HYDROMODIFICATION MANAGEMENT FACILITIES BY HOMEOWNER APN: 260-340-02 Planning Case #: 18-120 CDP Address: 1888 Montgomery Ave. Grading Plan: 14203-G THIS AGREEMENT is between the City of Encinitas, a municipal corporation, hereinafter referred to as the "City", and Cardiff School District, San Diego County, California, 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, pollution control, and hydromodification management 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, Hydromodification Management Plan (HMP) facilities, 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 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. , t 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 14203-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. OWNER: 1/9 J WinsoV, Superintendent Date Cardiff School District Signature of OWNER must be notarized. Attach the appropriate acknowledgement. CITY OF ENCINITAS: dward J. Uimer Date City Engine Development Services Department City of Encinitas r - 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 1 County of ' 'D lI J} On t/u-ne 20 20� `� before me, 6ra,�` cU L. ��, N�7�.A'1�S TWLj Date Here Insert Name and Title of th fficer personally appeared Ieal' �• ry-,evie.✓ 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 bRANDI L.LEWIS paragraph is true and correct. ` Notary Publlc-California Z San Diego County WITNESS m hand and official seal. Commission N 2242668 y '" ' • My Comm.Expires May 14,2022 Signature Place Notary Seal and/or Stamp Above Signature of Notary Publi 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:MAZOr . A*ir4eW�W k"� Q1n�rA�G S-�brWAJt%-T11ZAA f 4001)wT 11 G,n4cbe° Document Date: Number of Pages: 15 Signer(s) Other Than Named Above: 3.11 Vlr&Son, CA-vdL;- " S��o®�L �: • 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 /� ii Guardian of Conservator [I Trustee ❑ Guardian of Conservator ,e'Other: �^ ' !!2t 962✓�%nee✓` ❑ Other: Signer is Representing: Z--; Ob 5­aGk, faS Signer is Representing: ©2017 National Notary Association ACKNOWLEDGMENT A notary public or other officer completing ry p pl ng 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 Califo Ia County of_ Cyuo) ) On IM, before me, Poo (intLdrt name and title of the office personally appeared I Vn� 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. � ANGEL Y. GILREATHi J` COMMISSION NO.2125390 n v NOTARY PUBLIC-CALIFORNIA SAN DIEGO COUNTY COMMISSION EXPIRES SEPT 26,2019 Signature (Seal) EXHIBIT "A" LEGAL DESCRIPTION OF THE PROPERTY BLOCK 72, BLOCK 73 AND BLOCK 74, EXCEPT LOTS"F AND G" IN BLOCK 74, CARDIFF VILLA TRACT, IN THE CITY OF ENCINITAS, COUNTY OF SAN DIEGO,STATE OF CALIFORNIA,ACCORDING TO MAP THEREOF NO. 1469, FILED IN THE OFFICE OF THE COUNTY RECORDER OF SAN DIEGO COUNTY,AUGUST 10, 1912. TOGETHER WITH ALL OF EACH AVENUE BETWEEN BLOCKS 73 AND 74 FROM THE SOUTHWESTERLY LINE OF MONTGOMERY AVENUE TO THE NORTHERLY LINE OF BEETHOVEN AVENUE AND ALL OF BEETHOVEN AVENUE BETWEEN BLOCKS 72,73 AND 74 FROM THE EASTERLY LINE OF OLD STATE HIGHWAY(SAN ELIJO AVENUE)TO THE NORTHEASTERLY PROLONGATION OF THE SOUTHEASTERLY LINE OF LOT K IN SAID BLOCK 72 IN CARDIFF VILLA TRACT,ACCORDING TO MAP THEREOF NO. 1469, FILED RECORDED MAY 26, 1949 AS INSTRUMENT NO.47442 IN BOOK 3204, PAGE 122, IN THE OFFICE OF THE COUNTY RECORDER OF SAN DIEGO COUNTY. EXCEPTING THEREFROM THOSE PORTIONS THEREOF LYING WITHIN THAT CERTAIN EASEMENT FOR PUBLIC HIGHWAY DEDICATED TO THE COUNTY OF SAN DIEGO BY THE CARDIFF SCHOOL DISTRICT BY DEED DATED MAY 21, 1947, AND ACCEPTED BY THE BOARD OF SUPERVISORS OF SAN DIEGO COUNTY ON MAY 26, 1949 AS INSTRUMENT NO. 47367 IN BOOK 3209, PAGE 30. A P N: 260-340-02-00 EX OT U DESCRIP77ON AND PLAT OF STORMWA7ER FAC/LMES g ST 00000 S9. � � I noa°oo �'� �' p ST I ao0a0 O I j 2 '9J-, y EST I G S1 1-5 w 6` I O ;;, , ;, .�� � � S1 PROJECT SITE w \ K `n SANTA FE DR. a ` n ` � 9 VICINITY MAP B PAVE -- NOT TO SCALE PERMANENT BMP SIZING O AREA FOR PARTIAL INFILTRATION BASIN KEY MAP NO. REQUIRED FLAT AREA (SF) PROVIDED FLAT AREA (SF) NOT TO SCALE 81 2,809 3,875 B2 4,356 .5,263 LEGEND 10 PRIVATE BIOFILTRATION BASIN WITH PARTIAL RETENTION KETTLER-9�LEWECK (SEE DETAILS PAGES 2 AND 3) E N G I N E E R I N G ® LIMITS OF ONSITE PRIVATE 1620 5TH AVENUE,SUITE 675 BIOFILTRATION BASIN SAN DIEGO, CA 92101 t:619 269-3444 1 f:619 269-3459 www.kettlerleweck.com PAGE 1 OF 3 EXHIBIT 'B' DESCRIP71ON AND PLAT OF STORMWA7ER FACILITIES (DIMENSIONS SHOWN ON PLANS) DEEP ROOTED, DENSE, DROUGHT TOLERANT PLANTING SUITABLE AT 18" O.C. FOR WELL DRAINED SOIL (SEE LANDSCAPE PLANS) 1-INCH GRAVEL GRATED INLET, SEE DETAIL B HEREON rn V ivy 11111 CV,.Iv5k� i\� // 1 1=111=111=1 11=1 1= I I I I I=1 I I I I I=1 11=1 11=1 =1 11=1 11=1 I = w `�`/ / / III—III—I 11=1 11—II I I I =1 11=1 I —I 11=1 11=1 11=1 11=1 11=1 11=1 11=1 I cf) o z � �`� / I I—III—III—III—I 11= 11=1 11=1 I I I I I=1 11=1 11=1 11=1 11=1 11=1 11=1 I I � �,�� o ��`/� I I1=1 I I—III—III—III—I 11=1 I I—I I =1 11=1 11=1 11=1 I I—I 11=1 11=1 11=1 m H ` —1 I I—III—III—III—I 11=1 I I I I I=1 11=1 I I—III—I 11=1 I I—I 11=1 I I `/� / , ~o Ln N,L, \\i�/ III—I 11=1 11=1 11=1 11=1 11=1 11=1 I —I 11=1 I I—I 11=1 11=1 11=1 11=1 11= \�i m o �i,\�,\ �� I-1 I-1 I I-1 I I-1 I I-1 I I-1 I I-1 I I III-1 I I-1 I I-1 I I-1 I I-1 I I-1 I I-1 I I cn \\ \ /'\ G F E D C A. 4" LAYER OF 318" GRAVEL PARTIAL INFILTRATION BASIN (PVT.) DETAIL B. 12" LAYER OF 314" CRUSHED ROCK NTS C. 6" LAYER OF 314" CRUSHED ROCK (DEAD STORAGE) D. UNLINED/OPEN BOTTOM (CONTRACTOR TO AVOID COMPACTION OF BOTTOM SURFACE) E. CONNECT TO SOLID WALLED PVC PIPE (SEE NOTE 4) F. 6" PERFORATED PVC PIPE WRAPPED IN FILTER FABRIC NOTE: PLACE WITH PERFORATIONS AT THE INVERT (I.E. AT THE BOTTOM OF THE PIPE) G. IMPERMEABLE LINER (SIDES ONLY) MIRAFI 140 N 30 MIL HDPE EXTEND VERTICALLY TO A DEPTH GREATER THAN ADJACENT FOOTINGS. INSTALLATION AND ANCHORING PER MANUFACTURES SPECIFICATION AND TO BE OBSERVED BY PROJECT GEOTECHNICAL ENGINEER. H. 18" (MIN.) LAYER OF ENGINEERED SOIL (SEE NOTE 1 BELOW) I. WOOD MULCH AROUND CONTAINER PLANTING — 3 NOTES 1. ENGINEERED SOIL LAYER SHALL BE MINIMUM 18"DEEP "SANDY KETTLER*LEWECK LOAM" SOIL MIX WITH NO MORE THAN 5% CLAY CONTENT. THE MIX SHALL CONTAIN 65% SAND, 20% COMPOST OR HARDWOOD E N G I N E E R I N G MULCH, AND 15% TOPSOIL. 1620 5TH AVENUE, SUITE 675 2. 314" CRUSHED ROCK LAYER SHALL BE A MINIMUM OF 12". SAN DIEGO, CA 92101 3. THE EFFECTIVE AREA OF THE BASIN SHALL BE LEVEL. SEE PLAN t:619 2 I f: 269-3459 www.kett 4.kettlerlewec k.com FOR BOTTOM AREA AND ELEVATION. 4. CONTRACTOR TO PROVIDE WATERTIGHT SEAL BETWEEN OUTLET PIPE AND BASIN IMPERMEABLE LINER. PAGE 2 OF 3 EXHIBIT 'B' DESCRIP71ON AND PLAT OF STORM 7ER FACILITIES TOP OF G-2 GRATED INLET BMP NO. DRILLED HOLE (SEE PLAN) 1 1.8" FINISH SURFACE 2 2.2" \7 rrrrrr= (SEE PLAN) NOTE IlIi11111�11�I I �lill I Ihll� � _ SPECIAL INSPECTION OF THE BMP III-III=III III=III-III- � W —III—III-I I —III—III-III W€ FACILITIES BY A LICENSED CIVIL � I I I-I I 1=1 I( III-I I 1=1 I I— co ENGINEER IN THE STA TE OF CALIFORNIA -I II-III-II —III=III-II IS REQUIRED DURING CONSTRUCTION. IIII=III III=III-1 - - — — PRIOR TO OBTAINING BUILDING SEE ORIFICE PLATE OCCUPANCY, AN INSPECTION REPORT DETAILS THIS SHALL BE SUBMITTED WITH THE FINAL SHEET GRADING CERTIFICATION TO THE OF ENGINEERING DIVISION VERIFYING THE 6" PERF. PIPE SIZE AND DEPTH OF THE EXCAVATION, '��T��%������� GRAVEL AND ENGINEERED SOIL DEPTH ''N!���!r,���%� i1i�i• 18" OUTLET AND MATERIAL, STORM DRAIN PIPE, (SEE PLAN FOR INVERT) OVERFLOW FUNCTION OF THE FACILITIES ORIFICE (PVT.) DETAIL PER THE APPROVED GRADING PLAN. NOT TO SCALE ORIFICE PLATE: MIN. SQUARE DIMENSIONS 1' 4 1/16" NEOPRENE GREATER THAN PIPE GASKET DIA. HOT DIP 3" X 3/8" STAINLESS GALVANIZED PLATE STEEL BOLT & NUT AFTER HOLES HAVE BEEN DRILLED a---=°----=_ 10" X 10" X 0.25' GALVANIZED STEEL PLATE INFLOW PIPE 0 a° a ORIFICE: BOLT ORIFICE: BMP NO. 1 = 1.8 ---a---- HOLE BMP NO. 1 = 1.8" BMP NO. 2 = 2.2" --- BMP NO. 2 = 2.2" o o e ORIFICE PLATE DETAIL a ° NOT TO SCALE e d e ° KETTLER LEWECK ORIFICE PLATE SECTION 5 E c I N E E R I N c 1620 5TH AVENUE, SUITE 675 NOT TO SCALE SAN DIEGO, CA 92101 t: 619 269-3444 1 f:619 269-3459 www.kettlerleweck.com PAGE 3 OF 3 i EXHIBIT "C" MINIMUM MAINTENANCE REQUIREMENTS FOR STORMWATER FACILITIES BMP MAINTENANCE FACT SHEET FOR STRUCTURAL BMP PR-1 BIOFILTRATION WITH PARTIAL RETENTION Biofiltration with partial retention facilities are vegetated surface water systems that filter water through vegetation and soil or engineered media prior to infiltrating into native soils, discharge via underdrain,or overflow to the downstream conveyance system. These BMPs have an elevated underdrain discharge point that creates storage capacity in the aggregate storage layer.Typical biofiltration with partial retention components include: • Inflow distribution mechanisms(e.g.,perimeter flow spreader or filter strips) • Energy dissipation mechanism for concentrated inflows(e.g.,splash blocks or riprap) • Shallow surface ponding for captured flows • Side slope and basin bottom vegetation selected based on climate and ponding depth • Non-floating mulch layer • Media layer(planting mix or engineered media)capable of supporting vegetation growth • Filter course layer consisting of aggregate to prevent the migration of fines into uncompacted native soils or the aggregate storage layer • Aggregate storage layer with underdrain(s) • Uncompacted native soils at the bottom of the facility • Overflow structure Normal Expected Maintenance Biofiltration with partial retention requires routine maintenance to: remove accumulated materials such as sediment, trash or debris; maintain vegetation health; maintain infiltration capacity of the media layer; replenish mulch; 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 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 media layer, filter course, aggregate storage layer, underdrain, or outlet structure.The specific cause of the drainage issue must be determined and corrected. • Sediment, trash, or debris accumulation greater than 25% of the surface ponding volume within one month. This means the load from the tributary drainage area is too high, reducing BMP function or clogging the BMP. This would require pretreatment measures within the tributary area draining to the BMP to intercept the materials. Pretreatment components, especially for sediment,will extend the life of components that are more expensive to replace such as media,filter course,and aggregate layers. • 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 BMP to the original plan and grade,the[City Engineer]shall be contacted prior to any additional repairs or reconstruction. Other Special Considerations Biofiltration with partial retention is a vegetated structural BMP. 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. i SUMMARY OF STANDARD INSPECTION AND MAINTENANCE-PAGE 1 OF 2 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. Threshold/Indicator Maintenance Action Typical Maintenance Frequency Accumulation of sediment,litter,or debris Remove and properly dispose of accumulated materials, • Inspect monthly. If the BMP is 25% full* or more in without damage to the vegetation or compaction of the one month, increase inspection frequency to monthly media layer. plus after every 0.1-inch or larger storm event. • Remove any accumulated materials found at each inspection. 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. Damage to structural components such as weirs,inlet or Repair or replace as applicable. • Inspect annually. outlet structures • Maintenance when needed. Poor vegetation establishment Re-seed,re-plant,or re-establish vegetation per original . Inspect monthly. plans. • Maintenance when needed. Dead or diseased vegetation Remove dead or diseased vegetation,re-seed,re-plant, . Inspect monthly. or re-establish vegetation per original plans. . Maintenance when needed. Overgrown vegetation Mow or trim as appropriate. • Inspect monthly. • Maintenance when needed. 2/3 of mulch has decomposed,or mulch has been Remove decomposed fraction and top off with fresh • Inspect monthly. removed mulch to a total depth of 3 inches. . Replenish mulch annually,or more frequently when needed based on inspection. ..25%full'is defined as%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). SUMMARY OF STANDARD INSPECTION AND MAINTENANCE-PAGE 2 OF 2 Threshold/Indicator Maintenance Action Typical Maintenance Frequency Erosion due to concentrated irrigation flow Repair/re-seed/re-plant eroded areas and adjust the • Inspect monthly. irrigation system. . Maintenance when needed. Erosion due to concentrated storm water runoff flow Repair/re-seed/re-plant eroded areas, and make • Inspect after every 0.5-inch or larger storm event. If appropriate corrective measures such as adding erosion erosion due to storm water flow has been observed, control blankets, adding stone at flow.entry points, or increase inspection frequency to after every 0.1-inch minor re-grading to restore proper drainage according or larger storm event. to the original plan. If the issue is not corrected by . Maintenance when needed. If the issue is not restoring the BMP to the original plan and grade, the corrected by restoring the BMP to the original plan [City Engineer]shall be contacted prior to any additional and grade,the [City Engineer]shall be contacted prior repairs or reconstruction. to any additional repairs or reconstruction. Standing water in BMP for longer than 24 hours Make appropriate corrective measures such as adjusting • Inspect monthly and after every 0.5-inch or larger following a storm event irrigation system,removing obstructions of debris or storm event. If standing water is observed, increase invasive vegetation, clearing underdrains, or inspection frequency to after every 0.1-inch or larger Surface ponding longer than approximately 24 hours repairing/replacing clogged or compacted soils. storm event. following a storm event may be detrimental to • Maintenance when needed. vegetation health Presence of mosquitos/larvae If mosquitos/larvae are observed:first,immediately • Inspect monthly and after every 0.5-inch or larger remove any standing water by dispersing to nearby storm event. If mosquitos are observed, increase For images of egg rafts,larva,pupa,and adult landscaping;second,make corrective measures as inspection frequency to after every 0.1-inch or larger mosquitos,see applicable to restore BMP drainage to prevent standing storm event. htto://www.mosguito.org/biology water. • Maintenance when needed. If mosquitos persist following corrective measures to remove standing water,or if the BMP design does not meet the 96-hour drawdown criteria due to release rates controlled by an orifice installed on the underdrain,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. Underdrain clogged Clear blockage. • Inspect if standing water is observed for longer than 24-96 hours following a storm event. • Maintenance when needed.