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2019-366300 DOC# 2019-0366300 ��� 1 11111111111 IIIII IIIII IIII IIII IIIII IIIII IIIII IIIII IIIII IIIII IIII III Aug 27, 2019 03:49 PM OFFICIAL RECORDS Ernest J. Dronenburg, Jr., SAN DIEGO COUNTY RECORDER Recording Requested By: FEES: $0.00 (SB2 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 MAINTENANCE AGREEMENT FOR PRIVATE STORMWATER TREATMENT AND STORMWATER POLLUTION CONTROL AND HYDROMODIFICATION MANAGEMENT FACILITIES BY HOMEOWNER A.P.N.: 256-340-31 Grading Plan: 14094-G Address: Saxony Lane Case No: 16-147 CDP THIS AGREEMENT is between the City of Encinitas, a municipal corporation, hereinafter referred to as the "City", and County of San Diego, 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 1 •,1 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. 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 14094-G which Js 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. i 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 An y Y liabilit 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. 1 ,L i 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- -2I- 11 Brian Alb igh Date Director of Pa Ws and Recreation County of San Diego Signature of OWNER must be notarized. Attach the appropriate acknowledgement. CITY OF ENCINITAS: S Edward J. Wiflner Date City Enginee Development Services Department City of Encinitas I i 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 SAN DIEGO) ON 3 IZI 2019 BEFORE ME, ANGELA JACKSON-LLAMAS, DEPUTY COUNTY CLERK OF THE , COUNTY OF SAN DIEGO, PERSONALLY APPEARED lrai -A l�onnk::f- , 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 THIS 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. C'pRDERiC��1�1 ERNEST J. DRONENBURG, JR. `�� COUNTY ASSESSOR/RECORDER/COUNTY CLERK /a �/ Go Co Cr-r BY: xx ANGELA J C SON-LLAMAS, DEPUTY COUNTY CLERK � t ALL-PURPOSE ACKNOWLEDGMENT 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 1�ix v, SS. On —ZZ-7 O I , before me, e� 1 M(fin ,Notary Public, DATE personally appeared l c�wQ�� J _ 9 rn m e_r ,who proved to me on the basis of satisfactory evidence to be the person(s) whose name( is re subscribe the within instrument and ac d to me tha he he/they executed the sa hi / eir authori capacity(ies), and that b hi Ir signature(s) on the instrument the pe (s), or the entity upon behalf of which the ANGELA A. SIMON 'A person(s) acted, executed the instrument. g° NOTARMPUSLIC'CALFORNIA OJ N SAN DIEGO COUNTY I certify under PENALTY OF PERJURY under the G � MY ComM.EXP.MAR.2,202,r laws of the State of California that the foregoing paragraph is true and correct. WITNESS my hand and official seal. 111,74 " O'A 0 a a PLACE NOTARY SEAL IN ABOVE SPACE V NOTARY'S SIGNATURE OPTIONAL INFORMATION The information below is optional. However,it may prove valuable and could prevent fraudulent attachment of this form to an unauthorized document. CAPACITY CLAIMED BY SIGNER(PRINCIPAL) DESCRIPTION OF ATTACHED DOCUMENT INDIVIDUAL CORPORATE OFFICER TITLE OR TYPE OF DOCUMENT PARTNER(S) TITLE(S) ATTORNEY-IN-FACT NUMBER OF PAGES ❑ GUARDIAN/CONSERVATOR F SUBSCRIBING WITNESS DATE OF DOCUMENT F-1 OTHER: OTHER SIGNER(PRINCIPAL)IS REPRESENTING: RIGHT NAME OF PERSON(S)OR ENTITY(IES) THUMBPRINT e r SIGNER o a 0 APA01/2015 NOTARY BONDS,SUPPLIES AND FORMS AT HTTP://WWW.VALLEY-SIERRA.COM ©2005-2017VALLEY-SIERRAINSURANCE t EXHIBIT "A" Legal Description of Property SAN DIEGO, STATE OF CALIFORNIA, AND IS DESCRIBED AS FOLLOWS: PARCEL 1: APN: 257-020-27 (PORTION) THAT PORTION OF THE SOUTHWEST QUARTER OF THE SOUTHWEST QUARTER OF THE SOUTHEAST QUARTER OF SECTION 10, TOWNSHIP 13 SOUTH, RANGE 4 WEST, SAN BERNARDINO MERIDIAN, IN THE CITY OF ENCINITAS, IN THE COUNTY OF SAN DIEGO, STATE OF CALIFORNIA, ACCORDING TO THE OFFICIAL PLAT THEREOF, DESCRIBED AS FOLLOWS: BEGINNING AT THE SOUTH QUARTER CORNER OF SECTION 10, TOWNSHIP 13 SOUTH, RANGE 4 WEST, SAN BERNARDINO MERIDIAN; THENCE NORTH 03°26'40" EAST ALONG THE NORTH AND SOUTH CENTER LINE OF SAID SECTION 10, A DISTANCE OF 356.00 FEET TO AN INTERSECTION WITH A LINE WHICH IS PARALLEL WITH AND DISTANCE 355.65 FEET AT RIGHT ANGLES NORTHERLY FROM THE SOUTH LINE OF SAID SECTION 10; THENCE SOUTH 89°06'10" EAST ALONG SAID PARALLEL LINE TO A POINT INTERSECTION WITH THE CENTER LINE OF COUNTY ROAD SURVEY NO. 373 AS SAID ROAD SURVEY IS SHOWN ON MAP THEREOF ON FILED IN THE OFFICE OF THE COUNTY SURVEYOR OF SAID DISTANCE COUNTY; THENCE SOUTH 02°10'20"WEST, (RECORD SOUTH 02°13'10"WEST)ALONG THE CENTER LINE OF SAID ROAD A DISTANCE OF 355.73 FEET TOA POINT ON THE SOUTH LINE OF SAID SECTION 10; THENCE NORTH 89°06'10" WEST ALONG SAID SOUTH LINE TO THE POINT OF BEGINNING. PARCEL 1A: APN: 257-020-27 (PORTION) THE WEST HALF OF THE SOUTHWEST QUARTER OF THE SOUTHEAST QUARTER OF SECTION 10, TOWNSHIP 13 SOUTH, RANGE 4 WEST, SAN BERNARDINO MERIDIAN, IN THE CITY OF ENCINITAS, COUNTY OF SAN DIEGO, STATE OF CALIFORNIA, ACCORDING TO THE OFFICIAL PLAT THEREOF. EXCEPTING THEREFROM THAT PORTION THEREOF DESCRIBED AS FOLLOWS: BEGINNING AT THE SOUTH QUARTER CORNER OF SECTION 10, TOWNSHIP 13 SOUTH, RANGE 4 WEST, SAN BERNARDINO MERIDIAN; THENCE NORTH 3°26'40" EAST ALONG THE NORTH AND SOUTH CENTER LINE OF SAID SECTION 10, A DISTANCE OF 356.00 FEET TO AN INTERSECTION WITH A LINE WHICH IS PARALLEL WITH AND DISTANT 355.65 FEET AT RIGHT ANGLES NORTHERLY FROM THE SOUTH LINE OF SAID SECTION 10; THENCE SOUTH 89°06'10" EAST ALONG SAID PARALLEL LINE TO A POINT OF INTERSECTION WITH THE CENTER LINE OF THE COUNTY ROAD SURVEY NO. 373, AS SAID ROAD SURVEY IS SHOWN ON MAP THEREOF ON FILED IN THE OFFICE OF THE COUNTY SURVEYOR OF SAID SAN DIEGO COUNTY; THENCE SOUTH 2°10'20"WEST (RECORD SOUTH 2°13'10"WEST)ALONG THE CENTER LINE OF SAID ROAD, A DISTANCE OF 355.73 FEET TO A POINT ON THE SOUTH LINE OF SAID SECTION 10; THENCE NORTH 89°06'10"WEST ALONG SAID SOUTH LINE TO THE POINT OF BEGINNING. PARCEL 2: APN: 256-340-31 THAT PORTION OF THE NORTH HALF OF THE SOUTHEAST QUARTER OF THE SOUTHWEST QUARTER OF SECTION 10, TOWNSHIP 13 SOUTH, RANGE 4 WEST, SAN BERNARDINO BASE AND MERIDIAN, IN THE CITY OF ENCINITAS, IN THE COUNTY OF SAN DIEGO; STATE OF CALIFORNIA, LYING EASTERLY OF A LINE DESCRIBED AS FOLLOWS: COMMENCING AT THE NORTHEAST CORNER OF THE SOUTHEAST QUARTER OF THE SOUTHWEST QUARTER OF SAID SECTION 10; THENCE NORTH 89°10'14" WEST ALONG THE NORTHERLY LINE THEREOF OF A DISTANCE OF 679.06 FEET TO THE TRUE POINT OF BEGINNING; THENCE LEAVING SAID NORTHERLY LINE SOUTH 00°49'46" WEST, 650.68 FEET TO THE SOUTHERLY LINE OF THE NORTH HALF OF THE SOUTHEAST QUARTER OF THE SOUTHWEST QUARTER OF SAID SECTION 10 AND THE POINT OF TERMINUS. EXHIBIT "B" Description and Plat of Stormwater Facilities PROPERTY APN 257-020-27 ---------- LINE FND 3 4"IP LS415 INI 1 P RC 7 1 15'W DE SAN DIEGUITO IRRIGATION DISTRICT EASEMENT RECORDED 6 1D/1966 AS FILE PAGE NO. 96007—• I. 1 I 1 I! I - PROP RTY II LINE II PROPERTY LINE ° I I. 15' EAS M NT FOR ROAD AN INCIDENTA II PURPOSES IN THE DO O. 468 CUMENT RECORDED II N I APRIL 19, 1963 AS INSTRUMENT N 117 I II I I APN 256-340-31 II Q to z AN ASEMENT FOR WATER PIPE IN S AND a z INCIDENTAL PURPOSES, RECORDED JULY 31, II 1985 AS INSTRUMENT NO. 85-274415 OF Q OFFICIAL RECORDS. 11 � �❑ II I II I N r4.. .�_"• I N W - - U I LINE � I � o ? FND RCE2266 SO'49'55"W 650.74' ---_-_----- I 1 __ \ , T— I FND 3 4" IP RCE27 LJ LOCATION OF BIOFILTRATION BASINS. APN 256-340-41 jz ;O SEE BLOW UP SHEET 2. �I r7 + QD 1>- O H 11 Lo .x Q I u N � II a IQ KEY MAP RIFlCE PLATE: MIN. SQUARE DIMENSIONS 1' NFLOW PIPE GREATER THAN PIPE DIAMETER. HOT DIP GALVANIZE PLATE AFTER RIFlCE PLATE HOLES HAVE BEEN DRILLED 3°X a"STAINLESS �( ) STEEL BOLT/NUT(TYP) NFLOW PIPE GASKET O RIFACE DIAMETER: BMP 1: 1.5° RIFlCE BMP 2. 0.75° 1 1/2°MAX O DIAMETER NOTE: HOLE(TYP) ORIFICE & FLANGE CONNECTION TO CONCRETE SHALL BE ' FILLED WITH 30 DUROMETER NEOPRENE RING FLOW CONTROL ORIFICE PLATE N.T.S. SAN DIEGO BOTANIC GARDENS ENCINITAS, CA EXHIBIT"B"-DESCRIPTION AND PLAT OF STORMWATER FACILITIES SHEET 1 OF 2 r � 15- 24- z w z z P/L oJ w°J- o . Z 4g 7w a O2 d OU INLET OVERFLOW wow ~- INLET PER PLAN (Q700) r-a < o: 2. PER SDRSD G-2 WITH ORIFICE PLACE PER m' In MIN DETAIL ON SHEET 1 LEANOUT 4- 12- _— I 1-I 1I- 10-MAX ABOVE INLET. -1 -III—III=I - 2- 12• SURFACE 3.9" LOCATION PER PLAN GRADE TG 219.5 PONDING (Q1OO) LOP :. I- 219.9 PROPOSED GRAVI 218.5, I �.1 SLOPE -II=III WALL TYPE C PER SDRSD C-9 VARIES ._..... _._..:.:::, ......... ......__. 216.9-219.0± 3 18• 18- UNOOMPACTED 13IORETENTION SOIL MEDIA (BSM) PER APPENDIX G.1 OF THE MULCH CURRENT COUNTY OF SAN DIEGO LOW IMPACT DEVELOPMENT HANDBOOK STORMWATER MANAGEMENT STRATEGIES, COISTING OF 65%WASHED SAND, 20%SANDY LOAM, 12-MIN 21-q• CONSISTING 15%COMPOST(5%ORGANIC MATTER). PERCOLATION RATE=5-/HR MIN WASHED PEA GRAVEL FILTER COURSE •�'.• -.- WASHED, OPEN-GRADED 3'4 CRUSHED ROCK . BW ELEV PER PLA PERFORATED SUBDRAIN PER PLAN 12-MIN 12- STORM DRAI 15 MIL PVC OR HOPE IMPERMEABLE LINER PIPE PER PLAN B SITE SECTION (BMP 1 ) A 1 N.T.S. PA 15- 27' g z a z z w 1}I a a I 36"X36.OVERFLOW INLET w j LL TG 216.58 PER PLAN(Q1OO) a 9.42' WITH ORIFICE PLATE PER w N PROPOSED BLDG PER DETAIL ON SHEET 1 LL z w 3, SEPARATE PERMIT CLEANOUT 2- O z o 2� ABOVE INLET. F' BENCH 10-MAX-LOCATION PER PLAN. °m 7 FFE=220.0 12- SURFACE - Pao=219.25 215 PGNDING 219.50 3- ` 2• _ I I-I'. I MI I-III I I-III-III-III- -I I-� MULCH (Q700) 12-MIN- _ _ _ III _i TW 217.2 _= 1 111= 11=1 I I=I I I-I I IM 11-I I I-1 11-11 1=I 11=I I 1=1 I(- VARIES --- 1=I I-1 III III III—III I I—ITI- • 213.9-214.9± a 18- DOTING PER F 1:1 SLOPE BUILDING PERMIT 12-MIN q• 21 15 MIL PVC OR HOPE IMPERMEABLE INNER WASHED PEA GRAVEL FILTER COURSE R WASHED,OPEN-GRADED r CRUSHED ROCK GRAVITY WALL 12-MIN TYPE C PER 12- STORM DRAI 18- UNCOI,QACTED BIORETENTION SOIL MEDIA (BSM) PER APPENDIX G.1 SDRSD C-9 PIPE PER PLAN OF THE CURRENT COUNTY OF SAN DIEGO LOW IMPACT DEVELOPMENT HANDBOOK STORMWATER MANAGEMENT STRATEGIES, CONISISTING OF 65% WASHED SAND, 20%SANDY LOAM, AND 15%COMPOST (5%-ORGANIC 6-PERFORATE MATTER). PERCOLATION RATE=5-/HR MIN SUBDRAIN PER PLAN BW ELEV PER PLAN STING NATIVE SUBGRADE D SITE SECTION (BMP 2) A 1 N.T.S. i I G 219.91 1 ,215.72 \ `fG 12.J/ HORTICULTURE \ E 12. 4 11 N FFE 220.0 1 I— 3: —1 SLOE !�\ JE 22.6 BMP , =,,360 SF °z Z 48°X48° C8 / �TG 219.91 RIM 219.58 36-X36" C / IE 215.85 IE 215.50 N (In) RIM 216.58 IE 215.50 S(Out) IE 212.50 N (In) I w IE 212.50 S(Out) IE 212.50 E (In) m o I � SAN DIEGO BOTANIC GARDENS ENCINITAS, CA EXHIBIT"B"-DESCRIPTION AND PLAT OF STORMWATER FACILITIES SHEET 2 OF 2 r f BF-1 Biofiltration BMP MAINTENANCE FACT SHEET FOR STRUCTURAL BMP BF-1 BIOFILTRATION Biofiltration facilities are vegetated surface water systems that filter water through vegetation, and soil or engineered media prior to discharge via underdrain or overflow to the downstream conveyance system. Biofiltration facilities have limited or no infiltration. They are typically designed to provide enough hydraulic head to move flows through the underdrain connection to the storm drain system. Typical biofiltration 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) • Impermeable liner or uncompacted native soils at the bottom of the facility • Overflow structure Normal Expected Maintenance Biofiltration 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. BF-1 Page 1 of 11 January 12, 2017 BF-1 Biofiltration Other Special Considerations Biofiltration 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. BF-1 Page 2 of 11 January 12, 2017 BF-1 - Biofiltration SUMMARY OF STANDARD INSPECTION AND MAINTENANCE FOR BF-1 BIOFILTRATION 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). BF-1 Page 3 of 11 January 12, 2017 BF-1 Biofiltration SUMMARY OF STANDARD INSPECTION AND MAINTENANCE FOR BF-1 BIOFILTRATION(Continued from previous page) 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 a invasive vegetation, clearing underdrains, or inspection frequency to after every 0.1-inch or larger Surface po storm to longer than approximately 24 hours repairing/replacing clogged or compacted soils. storm event. following a storm event may be detrimental . 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. http://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. BF-1 Page 4 of 11 January 12, 2017 c BF-1 Biofiltration References American Mosquito Control Association. http://www.mosquito.org/ California Storm Water Quality Association (CASQA). 2003. Municipal BMP Handbook. https://www.casga.org/resources/bmp-handbooks/municipal-bmp-handbook County of San Diego.2014. Low Impact Development Handbook. http://www.sandiegocounty.gov/content/sdc/dpw/watersheds/susmp/lid.htmi San Diego County Copermittees.2016. Model BMP Design Manual,Appendix E, Fact Sheet BF-1. http://www.proiectcleanwater.org/index.php?option=com content&view=article&id=250&ltemid=220 BF-1 Page 5 of 11 January 12, 2017 r- BF-1 Biofiltration Page Intentionally Blank for Double-Sided Printing BF-1 Page 6 of 11 January 12, 2017 Jr, ' BF-1 Biofiltration Date: Inspector: BMP ID No.: Permit No.: APN(s): Property/Development Name: Responsible Party Name and Phone Number: Property Address of BMP: Responsible Party Address: INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 1 of 5 Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Accumulation of sediment,litter,or debris ❑ Remove and properly dispose of Maintenance Needed? accumulated materials,without damage to the vegetation ❑YES ❑ If sediment,litter,or debris accumulation ❑ NO exceeds 25%of the surface ponding E] N/A volume within one month(25%full*), add a forebay or other pre-treatment measures within the tributary area draining to the BMP to intercept the materials. ❑ Other/Comments: Poor vegetation establishment ❑ Re-seed,re-plant,or re-establish Maintenance Needed? vegetation per original plans ❑YES ❑ Other/Comments: ❑ NO ❑ N/A *"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). BF-1 Page 7 of 11 January 12, 2017 - c BF-1 Biofiltration Date: Inspector: BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 2 of 5 Threshold/indicator Maintenance Recommendation Date Description of Maintenance Conducted Dead or diseased vegetation ❑ Remove dead or diseased vegetation,re- Maintenance Needed? seed,re-plant,or re-establish vegetation per original plans ❑YES ❑ other/Comments: ❑ NO ❑ N/A Overgrown vegetation ❑ Mow or trim as appropriate Maintenance Needed? ❑ Other/Comments: ❑YES ❑ NO ❑ N/A I 2/3 of mulch has decomposed, or mulch has ❑ Remove decomposed fraction and top off been removed with fresh mulch to a total depth of 3 Maintenance Needed? inches ❑YES ❑ Other/Comments: ❑ NO ❑ N/A BF-1 Page 8 of 11 January 12, 2017 I BF-1 Biofiltration Date: Inspector: BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 3 of 5 Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Erosion due to concentrated irrigation flow ❑ Repair/re-seed/re-plant eroded areas and Maintenance Needed? adjust the irrigation system ❑YES ❑ Other/Comments: ❑ NO ❑ N/A Erosion due to concentrated storm water runoff ❑ Repair/re-seed/re-plant eroded areas, flow and make appropriate corrective Maintenance Needed? measures such as adding erosion control blankets,adding stone at flow ❑YES entry points,or minor re-grading to ❑ NO restore proper drainage according to ❑ N/A 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/Comments: BF-1 Page 9 of 11 January 12, 2017 - v G BF-1 Biofiltration Date: Inspector: BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 4 of 5 Threshold/Indicator Maintenance Recommendation Date Description of Maintenance Conducted Obstructed inlet or outlet structure ❑ Clear blockage Maintenance Needed? ❑ Other/Comments: ❑YES ❑ NO ❑ N/A Underdrain clogged (inspect underdrain if ❑ Clear blockage standing water is observed for longer than 24-96 hours following a storm event) ❑ Other/Comments: Maintenance Needed? ❑YES ❑ NO ❑ N/A Damage to structural components such as weirs, ❑ Repair or replace as applicable inlet or outlet structures ❑ Other/Comments: Maintenance Needed? ❑YES ❑ NO ❑ N/A BF-1 Page 10 of 11 January 12, 2017 BF-1 y Biofiltration Date: Inspector: BMP ID No.: Permit No.: APN(s): INSPECTION AND MAINTENANCE CHECKLIST FOR BF-1 BIOFILTRATION PAGE 5 of 5 Threshold/indicator Maintenance Recommendation Date Description of Maintenance Conducted Standing water in BMP for longer than 24-96 ❑ Make appropriate corrective measures hours following a storm event* such as adjusting irrigation system, removing obstructions of debris or Surface ponding longer than approximately 24 hours following a storm event may be invasive vegetation,clearing detrimental to vegetation health underdrains,or repairing/replacing clogged or compacted soils Maintenance Needed? ❑ other/Comments: ❑YES ❑ NO ❑ N/A Presence of mosquitos/larvae ❑Apply corrective measures to remove standing water in BMP when standing For images of egg rafts, larva, pupa, and adult water occurs for longer than 24-96 mosquitos,see hours following a storm event.** http://www.mosguito.org/biology ❑ Other/Comments: Maintenance Needed? ❑YES ❑ NO ❑ N/A *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. **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. BF-1 Page 11 of 11 January 12', 2017