cc 2022 AR 08/23 melrose way 15 lot subdivision p21-0130 — Vista City Council, August 23, 2022 (part 5 of 8)

1205 Melrose Way

ENGINEER OF WORK CERTIFICATION STATEMENT
Preparer's Certification
I hereby declare that I am the Engineer in Responsible Charge of design of storm water best management practices (BMPs)for this project, and that I have exercised responsible charge over the design of the BMPs as defined in Section 6703 of the Business and Professions Code, and that the design is consistent with the PDP requirements of the City of Vista BMP Design Manual,which is a design manual for compliance with local City and regional MS4 Permit(California Regional Water Quality Control Board San Diego Region Order No. R9-2015- 0100) requirements for storm water management.

I have read and understand that the City Engineer has adopted minimum requirements for managing urban runoff, including storm water,from land development activities, as described in the BMP Design Manual. I certify that this PDP SWAMP has been completed to the best of my ability and accurately reflects the project being proposed and the applicable BMPs proposed to minimize the potentially negative impacts of this project's land development activities on water quality. I understand and acknowledge that the plan check review of this PDP SWAMP by the City Engineer is confined to a review and does not relieve me, as the Engineer in Responsible Charge of design of storm water BMPs for this project, of my responsibilities for project design.

SWAMP PREPARED BY:

William J. Suiter
Pasco Laret Suiter&Associates
27127 Calle Arroyo, Suite 1904
San Juan Capistrano, CA 92675
949-661-6695
[email protected]
RCE68964
12-31-23
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Signature, PE ense Num er& Expiration Date
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William Justin uiter �`
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01/13/2022 OF CAS-
Date

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1205 Melrose Way

PROJECT OWNER CERTIFICATION STATEMENT
Owners Certification
This PDP SWAMP has been prepared for Zoran Djordjevich by Pasco Laret Suiter&Associates.The PDP SWAMP is intended to comply with the PDP requirements of the City of Vista BMP Design Manual, which is a design manual for compliance with local City and regional MS4 Permit (California Regional Water Quality Control Board San Diego Region Order No. 119-2015-0100) requirements for storm water management.

The undersigned,while it owns the subject property, is responsible for the implementation of the provisions of this plan. Once the undersigned transfers its interests in the property, its successor-in-interest shall bear the aforementioned responsibility to implement the best management practices (BMPs) described within this plan, including ensuring on-going operation and maintenance of structural BMPs.A signed copy of this document shall be available on the subject property into perpetuity.

OWNER DETAILS:

Zoran Djordjevich
551 Lynwood Dr
Encinitas, CA 92024
(760)497-8761
[email protected]
Project Owner's Signature
Print Name
Date

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120S Melrose Way

CITY OF VISTA STAFF REVIEW
Reviewed and Approved:

City Staff Signature: Date:

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1205 Melrose Way

PAGE INTENTIONALLY BLANK

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1205 Melrose Way

PROJECT VICINITY MAP
Project Name: 1205 Melrose Way
7 Permit Application Number: P21-0130
Insert Project Vicinity Map Below:

VICINITY MAP
HIGHWAY 78
SITE
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MELROsE WAYLU
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SUNS w o
N co
W E
S

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1205 Melrose Way
FORM 1 - PROJECT CATEGORY DETERMINATION CHECKLIST
This form is used to assess stormwater BMP requirements applicable to the proposed project.The form is available as a stand-alone fillable checklist on the City's website and a completed copy must be included with the final SWAMP submitted to the City.The form is available at:
http://www.cityofvista.com/services/city-departments/community-development/building-planning- permits-applications/land-development-autocad-templates/storm-water-forms

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Project ID:

CHECKLIST FOR DETERMINATION OF PROJECT
CITY OF VISTA CATEGORY
C A L I F 0 R N I A
Project Name: 1205 Melrose Way
Project Location:

APPLICABILITY OF PERMANENT, POST-CONSTRUCTION STORMWATER BMP

REQUIREMENTS AND PROJECT TYPE DETERMINATION
Overview and Instructions
The City of Vista's (City's) Stormwater Management Program is regulated by the San Diego regional municipal stormwater permit(referred to as a Municipal Separate Storm Sewer System Permit).This permit requires that new development and redevelopment projects incorporate permanent stormwater Best Management Practices (BMPs) into the project design. The City of Vista's BMP Design Manual(formerly SUSMP Manual) discusses BMP requirements applicable to new development and redevelopment projects.

ALL STANDARD AND PRIORITY PROJECTS ARE REQUIRED TO INCORPORATE SITE DESIGN AND SOURCE CONTROL BMPS. Additional treatment control and hydromodification management BMP requirements apply to projects that meet specific criteria or thresholds. This checklist must be completed by the project applicant or proponent, and is used to determine if those additional BMPs are required.

Not all site improvements are considered "development projects"under the MS4 Permit.

Development projects are defined by the MS4 Permit as "construction, rehabilitation, redevelopment, or reconstruction of any public or private projects". Development projects are issued local permits to allow construction activities. To further clarify, this checklist applies only to new development or redevelopment activities and/or projects that have the potential to contact storm water and contribute an anthropogenic source of pollutants, or reduce the natural absorption and infiltration abilities of the land.

A project must be defined consistent with the California Environmental Quality Act (CEQA) definitions of"project."
CEQA requires that the project include "the whole of the action". "Whole of the Action" means the project may not be segmented or phased into small parts either onsite or offsite if the effect is to reduce the quantity of impervious area and fall below thresholds for applicability of storm water requirements. This requirement precludes "piece-mealing," which is the improper (and often artificial) separation of a project into smaller parts to avoid preparing Environmental Impact Report level documentation.

As indicated above, for the purposes of the BMP Design Manual, the "project" is the "whole of the action" which has the potential for adding or replacing or resulting in the addition or replacement of, roofs, pavement, or other impervious surfaces, thereby resulting in increased flows and storm water pollutants.

When defining the project, the following questions are considered:
• What are the project activities?
• Do they occur onsite or offsite?
• What are the limits of the project (project boundary)? • What is the whole of the action associated with the project (i.e. what is the total amount of new or

replaced impervious area considering all of the collective project components through all phases of the project)?
• Are any facilities or agreements to build facilities offsite in conjunction with providing service to the project (street-widening, utilities)?
Responses to the checklist represent an initial assessment of the proposed project conditions and impacts.

City staff will confirm this checklist based on assessment of the development application and/or project plans. Results of the checklist will classify a project as one of the following: Priority Development Project, Standard Project, or Non-development Project.

If additional information is needed while completing this checklist, please refer to the City's BMP Design Manual. Alternatively, contact City Land Development staff.

This Form is divided into 4 sections:

1. Post-Construction Stormwater Requirement Exemptions

2. Priority Development Project Determination

3. Special Consideration for Redevelopment Projects (50 Percent Rule)

4. Final Project Determination

JECTION
• • • • ' ' City of Vista• • • This section will determine whether your project is exempt from post- construction BMP requirements and would be classified as a Non-Development YES NO Project. See section 1.3 of the City's BMP Design Manualfor further discussion. (a) Replacement of impervious surfaces that are part of a routine maintenance activity, such as (check yes if any apply): ❑ (i) Replacing roof material on an existing building
(i i) Rebuilding a structure to original design after damage from earthquake, fire or similar disaster
(iii) Restoring pavement or other surface materials affected by trenches from utility work
(iv) Resurfacing existing roads and parking lots, including slurry, overlay and restriping
(v) Routine replacement of damaged pavement, including full depth replacement, if the sole purpose is to repair the damage (vi) Constructing new sidewalk, pedestrian ramps or bike lanes on existing roads (within existing street right-of-way)
(vii) Restoring a historic building to its original historic design (viii) Routine replacement of damaged pavement, such as pothole repair
Note: Work that creates impervious surface outside of the existing impervious footprint is not considered routine maintenance.
(b) Repair or improvements to an existing building or structure that do not ❑ alter the size (check yes if any apply):
(i) Plumbing, electrical and HVAC work
(i i) Interior alterations including major interior remodels and tenant build- out within an existing commercial building
(iii) Exterior alterations that do not change the general dimensions and structural framing of the building (does not include building additions or projects where the existing building is demolished)
If you answered YES to either category (a) or (b), your project is considered a Non-Development Project, and post construction BMP requirements do not apply. Please proceed to Section 4 and check the Non- Development Project box.

If you answered NO to category (a) and (b), please proceed to Section 2.

• N 2 - PRIORITY DEVELOPMENTPROJECT City of Vista

DETERMINATION
This section determines whether your project is a Priority Development Project(PDP) or a Standard Project. See section 1.4 of the City's BMP YES NO Design Manual for further discussion. The following eight (8) types of projects are defined as PDPs:
(a) New development projects that create 10,000 square feet or more of impervious surfaces (collectively over the entire project site). This includes ® ❑ commercial, industrial, residential, mixed-use, and public development projects on public or private land.
(b) Redevelopment projects that create and/or replace 5,000 square feet or more of impervious surface (collectively over the entire project site on an existing site of 10,000 square feet or more of impervious surfaces). This ❑ includes commercial, industrial, residential, mixed-use, and public development projects on public or private land.
(c) New and redevelopment projects that create and/or replace 5,000 square feet or more of impervious surface (collectively over the entire project site), and support one or more of the following uses:
(i) Restaurants. This category is defined as a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial Classification (SIC) code 5812). (ii) Hillside development projects. This category includes development on ❑ any natural slope that is twenty-five percent or greater. (iii) Parking lots. This category is defined as a land area or facility for the temporary parking or storage of motor vehicles used personally, for business, or for commerce.
(iv) Streets, roads, highways, freeways, and driveways. This category is defined as any paved impervious surface used for the transportation of automobiles, trucks, motorcycles, and other vehicles.

(d) New or redevelopment projects that create and/or replace 2,500 square feet or more of impervious surface (collectively over the entire project site), and ❑ discharge directly to an Environmentally Sensitive Area (ESA). "Discharging directly to" includes flow that is conveyed overland a distance of 200 feet or less from the project to the ESA, or conveyed in a pipe or open channel any distance as an isolated flow from the project to the ESA (i.e. not commingled with flows from adjacent lands).

Note: ESAs are areas that include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; State Water Quality Protected Areas; water bodies designated with the RARE beneficial use by the State Water Board and San Diego Water Board; and any other equivalent environmentally sensitive areas which have been identified by the City.

For projects adjacent to an ESA, but not discharging to an ESA, the 2,500 sq-ft threshold does not apply as long as the project does not physically disturb the ESA and the ESA is upstream of the project.

There are no Areas of Special Biological Significance (ASBS) or State Water Quality Protected Areas in the City's jurisdiction. The ESAs within the City's boundaries which include 303(d)-listed impairments and RARE beneficial use designations are listed below:
• Agua Hedionda Creek
• Buena Creek
• Buena Vista Creek
• Loma Alta Creek
(e) New development projects, or redevelopment projects that create and/or ❑ replace 5,000 square feet or more of impervious surface, that support one or more of the following uses:
(i) Automotive repair shops. This category is defined as a facility that is categorized in any one of the following SIC codes: 5013, 5014, 5541, 7532-7534, or 7536-7539.
(i i) Retail gasoline outlets.This category includes Retail gasoline outlets that meet the following criteria: (a) 5,000 square feet or more or (b) a projected Average Daily Traffic of 100 or more vehicles per day. (f) New or redevelopment projects that result in the disturbance of one or more ® ❑ acres of land and are expected to generate pollutants post construction. This means any activity that moves soils or substantially alters the pre-existing vegetated or man-made cover of any land. This includes, but is not limited to the following:
(i) Grading, digging, cutting, scraping, stockpiling, pavement removal, and exterior construction;
(i i) Substantial removal of vegetation where soils are disturbed including but not limited to removal by clearing or grubbing; or
(iii) Any activity which bares soil or rock or involves streambed alterations or the diversion or piping of any watercourse.

If you answered YES to any of the categories above (a-f), your project is considered a PDP. Please proceed to section 3 and check the Priority Development Project Box in Section 4.

If you answer NO to all categories, then your project is considered a Standard Project. Please proceed to Section 4 and check the Standard Project Box.

This section determines additional considerations required for Redevelopment YES NO PDPs. See section 1.7 of the City's BMP Design Manual for further discussion.

Will redevelopment result in the creation or replacement of impervious surface in ❑ ❑ an amount of more than 50 percent of the surface area of the previously existing development? See clarification on calculation of the ratio of impervious surface below.

These requirements for managing storm water on an entire redevelopment project site are commonly referred to as the "50 Percent Rule". For the purpose of calculating the ratio, the surface area of the previously existing development shall be the area of impervious surface within the previously existing development. The following steps shall be followed to estimate the area that requires treatment to satisfy the MS4 Permit requirements:

1. How much total impervious area currently exists on the site?

2. How much existing impervious area will be replaced with new impervious area?

3. How much new impervious area will be created in areas that are pervious in the existing condition?

4. Total created and/or replaced impervious surface = Step 2 + Step 3.

5. 50 Percent Rule Test: Is step 4 more than 50 Percent of Step 1? If yes, treat all impervious surface on the site (including existing impervious surface not being replaced or added). If no, then treat only Step 4 impervious surface and any area that comingles with created and/or replaced impervious surface area.

Note: Step 2 and Step 3 must not overlap, as it is fundamentally not possible for a given area to be both "replaced" and "created" at the same time. Also activities that occur as routine maintenance (see Section 1 of this form) shall not be included in Step 2 and Step 3 calculation.

For example, a 10,000 square foot development proposes replacement of 4,000 square feet of impervious area. The treated area is less than 50 percent of the total development area and only the 4,000 square foot area is required to be treated.

If you answered YES, then you must implement the PDP requirements for all impervious surfaces across the entire site. Please proceed to Section 4 and check the box under PDP indicating that the Project Is a Redevelopment Project Subject to the 50 Percent Rule.

If you answered NO,then you are only required to treat impervious surfaces that are replaced or created.

Please proceed to section 4 and check the box under PDP indicating this is Not a Redevelopment Project Subject to the 50 Percent Rule.

-P City of Vista
EECTION 4 - FINAL PROJECT DETERIVIINATION�� BMP Design Manua BASED ON THE INFORMATION PROVIDED IN SECTIONS 1-3, THIS PROJECT IS DETERMINED TO BE A:
® PRIORITY DEVELOPMENT PROJECT. PRIORITY REQUIREMENTS APPLY AND A STORM

WATER QUALITY MANAGEMENT PLAN (SWQMP) MUST BE SUBMITTED AT THE TIME OF APPLICATION.
❑ THIS IS A REDEVELOPMENT PROJECT SUBJECT TO THE 50 PERCENT RULE. ❑x THIS IS NOT A REDEVELOPEMNT PROJECT SUBJECT TO THE 50 PERCENT RULE. ❑ STANDARD PROJECT. STANDARD REQUIREMENTS APPLY AND APPLICABLE SECTIONS

OF A STORM WATER QUALITY MANAGEMENT PLAN (SWQMP) MUST BE SUBMITTED AT THE TIME OF APPLICATION.
❑ NON DEVELOPMENT PROJECT.

Applicant Information and Signature Box City use only Address: APN(s) Concur: Yes No
1205 Melrose Way 166-184-09 &10, 166-183-17
Applicant Name: Applicant Title: By:

Date:

Applicant Signature: Date:

Land Dev#:

Supporting discussion for this checklist, as well as BMP requirements for Priority Development Projects and Standard Projects, is provided in the City of Vista BMP Design Manual.

1205 Melrose Way
FORM 2 - PROJECT OVERVIEW

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Project Name 1205 Melrose Way
Project Address 1205 Melrose Way
Vista, CA 92081
Assessor's Parcel Number(s) (APN(s)) 166-183-17, 166-184-09 & 166-184-10 Permit Application Number P21-0130
Watershed (select one checkbox; use webpage below to determine watershed) http://www.cityofvista.com/services/city-departments/community-development/building-planning- permits-applications/land-development-autocad-templates/storm-water-forms San Luis Rey ❑ Lower San Luis Rey—Mission, 903.11 Carlsbad ❑ Loma Alta—Loma Alta, 904.10
❑ Buena Vista—El Salto,904.21
❑X Buena Vista—Vista, 904.22
❑X Agua Hedionda—Los Monos, 904.31
❑ Agua Hedionda—Buena, 904.32
❑ San Marcos—Batiquitos, 904.51
Parcel Area
(total area of Assessor's Parcel(s) associated 1 2.67 Acres (516,243 Square Feet) with the project)
Area to be Disturbed by the Project
(Project Area) 1 2.85 Acres (524,210 Square Feet) Project Proposed Impervious Area
(subset of Project Area) 1 1.36* Acres ( 59,386* Square Feet) Project Proposed Pervious Area
(subset of Project Area) 1 1•49** Acres ( 64,824** Square Feet) NOTE: Proposed Impervious Area + Proposed Pervious Area =Area to be Disturbed by the Project.

This may be less than the Parcel Area.
* 51,837 sf impervious area on-site+7,549 sf impervious area off-site = 59,386 sf total ** 59,503 sf pervious area on-site+5,321 sf pervious area off-site=64,824 sf total

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1205 Melrose Way
Form 2, Page 2 of 11

DESCRIPTION OF EXISTING SITE CONDITIONS
Current Status of the Site (select all that apply and describe below):

Z Existing development
❑ Previously graded but not built out
❑ Demolition completed without new construction
❑ Agricultural or other non-impervious use
X Vacant, undeveloped/natural
Describe:

An existing single-family home is located in the southwest corner of 166-184-10.The remaining portion of 166-184-10, all of 166-184-09 and 166-183-17 are un-developed/vacant land.

Existing Land Cover Includes (select all that apply and describe below):

Z Vegetative Cover 1 2.493 Acres ( 108,613 Square Feet) ❑ Non-Vegetated Pervious Areas I Acres ( Square Feet) 0 Impervious Areas 1 0.175 Acres( 7,630 Square Feet) Describe:

Existing single-family home is located in the southwest corner of 166-184-10 with associated hardscape.

The remaining land is un-developed/vacant.

Underlying Soil belongs to Hydrologic Soil Group (select all that apply):
❑ NRCS Type A
❑ NRCS Type B
❑ NRCS Type C
0 NRCS Type D
Approximate Depth to Groundwater(GW):
❑ GW Depth 20 feet
Per project Geotechnical Study, no groundwater was encountered during their testing.

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120S Melrose Way
Existing Natural Hydrologic Features (select all that apply and describe in next section):
❑ Drainage ditch/Swale/Waterway
❑ Seeps
❑ Springs
❑ Wetlands
0 None

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1205 Melrose Way
Form 2, Page 3 of 11

DESCRIPTION OF EXISTING SITE DRAINAGE PATTERNS
How is storm water runoff conveyed from the site?At a minimum, this description should answer:

1. Is existing site drainage conveyance natural or improved storm drain (urbanized);

2. Is runoff from offsite conveyed through the site? If yes, quantify all offsite drainage areas, design flows, and locations where offsite flows enter the project site, and summarize how such flows are conveyed through the site;

3. Provide details regarding existing project site drainage conveyance network, including any existing storm drains, concrete channels, swales, detention facilities, storm water treatment facilities, natural or constructed channels; and

4. Identify all discharge locations from the existing project site along with a summary of conveyance system size and capacity for each of the discharge locations. Provide summary of the pre-project drainage areas and design flows to each of the existing runoff discharge locations.

Describe existing site drainage patterns:

In the existing condition,the northwesterly portion of the site sheet flows southwest to northeast to a concrete ditch on the adjacent property that runs along the property line.The remaining portion of the site generally slopes from south to north toward the northeasterly corner to a concrete ditch on the adjacent property. Both ditches ultimately drain to a storm drain that flows north in existing storm drain infrastructure in Breeze Hill that flows north through the County Complex to Melrose Drive. It then flows north in Melrose Drive where it outfalls into Buena Vista Creek located north of Hacienda Drive. Buena Vista Creek outlets into Buena Vista Lagoon, and ultimately the Pacific Ocean.

Pre-project Discharge Node Area (ac) Q100 (cfs) North Basin 160 0.5 1.04
South Basin 110 2.0 3.49
Refer to the drainage report for the project titled "Hydrology Study for 1205 Melrose Way" prepared by Pasco Laret Suiter&Associates dated March 2021.

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120S Melrose Way
Form 2, Page 4 of 11

DESCRIPTION OF PROPOSED SITE DEVELOPMENT
Project Description/Proposed Land Use and/or Activities:

The project proposes to demolish the existing residence and associated hardscape improvements and construct 15 single-family detached residences, a new private street, curb &gutter, sidewalk, graded pads, drainage appurtenances, landscape, hardscape, associated utilities, and a biofiltration area designed for stormwater treatment, hydromodification management, and to mitigate for the 100-year 6-hour storm event.

Runon from the westerly adjacent properties drain onto the project site in the existing condition and will be captured in proposed brow ditches and bypass via storm drain through the project site.The storm drain will ultimately outlet to the existing brow ditches along the property boundary.

Offsite improvements to Melrose Way include removal and replacement of the half-width of asphalt, construction of curb&gutter and sidewalk along the property frontage.Additional gravel paving to be provided at the northwest corner to connect the property to the existing access drive and will be utilized for emergency vehicle access only.

Offsite improvement to the frontage on Melrose way requires additional site design BMPs to satisfy pollutant control treatment, hydromodification management, and volume retention requirements, therefore tree wells have been sized to meet the requirements.The proposed trees are located within DMA 2-1. Each tree well is a 30ft mature canopy diameter with a max soil depth of 36" and a minimum soil volume of 2cf per square foot of canopy projection for each tree, no underdrain, and provides 420 cf.Tree credit volume has been calculated per Appendix B.2.2.1 of the Storm Water Standards Manual.

Volume retention compliance has been shown using Worksheet B.5-6. Refer to Attachment 1E for all applicable completed BMP Sizing Worksheets.

List/describe proposed impervious features of the project (e.g., buildings, roadways, parking lots, courtyards, athletic courts, other impervious features):

Asphalt roadway, concrete driveways, sidewalk, and single-family residences.

List/describe proposed pervious features of the project (e.g., landscape areas):

Landscape areas and biofiltration basin.

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1205 Melrose Way
Does the project include grading and changes to site topography? ❑ Yes
❑ No
Describe:

Grading is proposed for the new access roads and pads for the homes.The project will be graded so that the site drains toward the proposed biofiltration basin.

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120S Melrose Way
Form 2, Page 5 of 11

DESCRIPTION OF PROPOSED SITE DRAINAGE PATTERNS
Does the project include changes to site drainage (e.g., installation of new storm water conveyance systems)?
❑X Yes
❑ No
If yes, provide details regarding the proposed project site drainage conveyance network, including storm drains, concrete channels, swales, detention facilities,storm water treatment facilities, natural or constructed channels, and the method for conveying offsite flows through or around the proposed project site. Identify all discharge locations from the proposed project site along with a summary of the conveyance system size and capacity for each of the discharge locations. Provide a summary of pre-and post-project drainage areas and design flows to each of the runoff discharge locations. Reference the drainage study for detailed calculations.

Describe proposed site drainage patterns:

The proposed residential lots and the proposed private streets and access roads will drain to proposed stormwater infrastructure that will outlet into the proposed biofiltration treatment basin. Stormwater will either be caught in a subdrain system, or overflow into the 36" grate inlet where it will all outlet to a proposed storm drain pipe that flows northwest to outlet into an existing concrete drainage ditch, as it does in the existing drainage condition.

A self-mitigating slope located in the northeast corner of the site will drain toward an existing concrete ditch that flows north, as it does in the in the existing drainage condition.

Off-site drainage from the west that flows on-site will be captured in proposed brow ditches and bypass via storm drain through the project site.The storm drain will ultimately outlet to the existing brow ditches along the property boundary.

Pre ProjectPost-Project
Discharge Area Q100 Discharge Area Q100 (cfs) Node ac (cfs) Node ac
North 160 0.5 1.04 175 0.05 0.10 (un-mitigated) Basin
South 110 2.0 3.49 165 2.5 3.83 (mitigated)
Basin
Offsite improvement to the frontage on Melrose way requires additional site design BMPs to satisfy pollutant control treatment, hydromodification management, and volume retention requirements, therefore tree wells have been sized to meet the requirements.The proposed trees are located within DMA 2-1. Each tree well is a 30ft mature canopy diameter with a max soil depth of 36" and a minimum soil volume of 2cf per square foot of canopy projection for each tree, no underdrain, and provides 420 cf.Tree credit volume has been calculated per Appendix B.2.2.1 of the Storm Water Standards Manual.

Volume retention compliance has been shown using Worksheet B.5-6. Refer to Attachment 1E for all applicable completed BMP Sizing Worksheets.

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1205 Melrose Way
Refer to the drainage report for the project titled "Hydrology Study for 1205 Melrose Way' prepared by Pasco Laret Suiter&Associates dated March 2021.

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1205 Melrose Way
Form 2, Page 6 of 11

POTENTIAL POLLUTANT SOURCE AREAS
Identify whether any of the following features, activities, and/or pollutant source areas will be present.

Select all Pollutant Source Areas that apply and include them on the DMA Exhibit. Source control BMPs must be identified for each of these areas in Form 3 of this SWAMP:
❑X On-site storm drain inlets
❑ Sump pumps or French drains
❑ Interior or sub-surface parking garages
❑X Need for future indoor&structural pest control
❑X Landscape/outdoor pesticide use
❑ Pools, spas, ponds, decorative fountains, or other water features ❑ Food preparation and/or service
❑X Refuse/trash collection areas
❑ Industrial processes
❑ Outdoor storage of equipment, chemicals, or materials ❑ Vehicle and equipment cleaning
❑ Vehicle/equipment repair and maintenance
❑ Fuel dispensing areas
❑ Loading docks
❑X Fire sprinkler test and relief point
❑X Miscellaneous drain or wash down areas
❑X Plazas, sidewalks, and parking lots
Describe:

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120S Melrose Way
Form 2, Page 7 of 11

IDENTIFICATION AND NARRATIVE OF RECEIVING WATER AND POLLUTANTS OF CONCERN Describe flow path of storm water from the project site discharge location(s),through urban storm conveyance systems as applicable,to receiving creeks, rivers, and lagoons as applicable, and ultimate discharge to the Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable):

The project site itself is located in the Agua Hedionda Hydrologic Area, however stormwater from the project drains to concrete ditches on the adjacent properties that both ultimately drain to a storm drain that flows north in existing storm drain infrastructure in Breeze Hill Rd that flows north through the County Complex to Melrose Drive. It then flows north in Melrose Drive where it outfalls into Buena Vista Creek located north of Hacienda Drive. Buena Vista Creek outlets into Buena Vista Lagoon, and ultimately the Pacific Ocean.

List any 303(d) impaired water bodies within the path of storm water from the project site to the Pacific Ocean (or bay, lagoon, lake or reservoir, as applicable), identify the poll utants)/stressor(s) causing impairment, and identify any TMDLs and/or Highest Priority Pollutants from the WQIP for the impaired water bodies:

TMDLs/WQIP Highest Priority
303(d) Impaired Water Body Pollutant(s)/Stressor(s) Pollutant Buena Vista Creek Benthic Community Effects, TMDL Required Bifenthrin, Selenium,Toxicity
Buena Vista Lagoon Indicator Bacteria, Nutrients, TMDL Required Sedimentation/Siltation,Toxicity
Identification of Project Site Pollutants*
*Identification of project site pollutants is only required if flow-thru treatment BMPs are implemented onsite in lieu of retention or biofiltration BMPs(note the project must also participate in an alternative compliance program unless prior lawful approval to meet earlier PDP requirements is demonstrated) Identify pollutants expected from the project site based on all proposed use(s) of the site (see BMP Design Manual Appendix B.6):

Not Applicable to the Expected from the Also a Receiving Water Pollutant Project Site Project Site Pollutant of Concern Sediment
Nutrients
Heavy Metals
Organic Compounds
Trash & Debris
Oxygen Demanding ❑ ❑ ❑
Substances
Oil & Grease
Bacteria &Viruses
Pesticides

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1205 Melrose Way
Form 2, Page 8 of 11

HYDROMODIFICATION MANAGEMENT REQUIREMENTS
Do hydromodification management requirements apply(see Section 1.6 of the BMP Design Manual; select one box and describe below)?
❑X Yes, hydromodification management flow control structural BMPs required. ❑ No,the project will discharge runoff directly to existing underground storm drains discharging directly to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean. ❑ No,the project will discharge runoff directly to conveyance channels whose bed and bank are concrete-lined all the way from the point of discharge to water storage reservoirs, lakes, enclosed embayments, or the Pacific Ocean.
❑ No,the project will discharge runoff directly to an area identified as appropriate for an exemption by the WMAA for the watershed in which the project resides.

Describe:

The biofiltration area designed for stormwater treatment, hydromodification management, and to mitigate for the 100-year 6-hour storm event.

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1205 Melrose Way
Form 2, Page 9 of 11

CRITICAL COARSE SEDIMENT YIELD AREAS
*This section only required if hydromodification management requirements apply Based on the maps provided within the WMAA, do potential critical coarse sediment yield areas exist within the project drainage boundaries (select all that apply and describe below)?Additional signed and stamped reports must be provided to document any exemption from coarse sediment yield requirements.
❑ Yes
❑X No, No critical coarse sediment yield areas to be protected based on WMAA maps If yes, have any of the optional analyses presented in Section 6.2 of the BMP Design Manual been performed?
❑ 6.2.1 Verification of Geomorphic Landscape Units (GLUs) Onsite ❑6.2.2 Downstream Systems Sensitivity to Coarse Sediment ❑6.2.3 Optional Additional Analysis of Potential Critical Coarse Sediment Yield Areas Onsite ❑No optional analyses performed,the project will avoid critical coarse sediment yield areas identified based on WMAA maps
If optional analyses were performed, what is the final result? ❑No critical coarse sediment yield areas to be protected based on verification of GLUs onsite ❑Critical coarse sediment yield areas exist but additional analysis has determined that protection is not required. Documentation attached in Attachment 2.13 of the SWQMP. ❑Critical coarse sediment yield areas exist and require protection.The project will implement management measures described in Sections 6.2.4 and 6.2.5 as applicable, and the areas are identified on the SWQMP Exhibit.

Describe:

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1205 Melrose Way
Form 2, Page 10 of 11

FLOW CONTROL FOR POST-PROJECT RUNOFF
*This section only required if hydromodification management requirements apply List and describe point(s) of compliance for hydromodification management flow control (see Section

6.3.1). Identify each point of compliance for flow control on the Hydromodification Management Exhibit in Attachment 2A.

There is one POC for the project, POC-1, located in the northeast corner of the project site and has a low flow threshold of 0.1Q2. Refer to the HMP exhibit located in Attachment 2a for the POC location.

Stormwater from the project drains to concrete ditches on the adjacent properties that both ultimately drain to a storm drain that flows north in existing storm drain infrastructure in Breeze Hill Rd that flows north through the County Complex to Melrose Drive. It then flows north in Melrose Drive where it outfalls into Buena Vista Creek located north of Hacienda Drive. Buena Vista Creek outlets into Buena Vista Lagoon, and ultimately the Pacific Ocean.

Has a geomorphic assessment been performed for the receiving channel(s)? ❑X No,the low flow threshold is 0.1Q2 (default low flow threshold) ❑ Yes,the result is the low flow threshold is 0.1Q2
❑ Yes,the result is the low flow threshold is 0.3Q2
❑ Yes,the result is the low flow threshold is 0.5Q2
If a geomorphic assessment has been performed, provide the report.

Discussion/Additional Information: (optional)

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1205 Melrose Way
Form 2, Page 11 of 11

OTHER SITE REQUIREMENTS AND CONSTRAINTS
When applicable, list other site requirements or constraints that will influence storm water management design, such as zoning requirements including setbacks and open space, or local codes governing minimum street width, sidewalk construction, allowable pavement types, and drainage requirements.

Optional Additional Information or Continuation of Previous Sections As Needed This space provided for additional information or continuation of information from previous sections as needed.

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1205 Melrose Way
FORM 3 - SOURCE CONTROL BMPS FOR ALL DEVELOPMENT PROJECTS

Page 1 of 4 ends

PROJECT IDENTIFICATION &SOURCE CONTROLS
Project Name: 1205 Melrose Way
Permit Application Number P21-0130
All development projects must implement source control BMPs SC-1 through SC-6, unless justification is provided by qualified design professional See Chapter 4 and Appendix E of the Model BMP Design Manual for information to implement source control BMPs shown in this checklist.

Answer each category below pursuant to the following, and provide description. • "Yes" means the project will implement the source control BMP as described in Chapter 4 and/or Appendix E of the Model BMP Design Manual.
• "No" means the BMP is applicable to the project but it is not feasible to implement. • "N/A" means the BMP is not applicable at the project site because the project does not include the feature that is addressed by the BMP (e.g.,the project has no outdoor materials storage areas).

Source Control Requirement Applied?
SC-1 Prevention of Illicit Discharges into the MS4 ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Provide effective irrigation, dispersion of non-storm water discharges into landscape SC-2 Storm Drain Stenciling or Signage I ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Site will provide prohibitive dumping placards and/or signage -Post signage at public access points to deter prohibitive dumping -Maintain legibility of placards and signage
SC-3 Protect Outdoor Materials Storage Areas from Rainfall, Run-On, ❑ Yes ❑ No ❑X N/A Runoff, and Wind Dispersal
Describe how source control will be implemented, or justify if not feasible:
-No outdoor storage areas proposed
SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall, ❑ Yes ❑ No ❑X N/A Run-On, Runoff, and Wind Dispersal
Describe how source control will be implemented, or justify if not feasible:
-No outdoor work areas proposed

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1205 Melrose Way
Form 3, Page 2 of 4
Source Control Requirement Applied?
SC-5 Protect Trash Storage Areas from Rainfall, Run-On, Runoff, and ❑X Yes ❑ No ❑ N/A Wind Dispersal
Describe how source control will be implemented, or justify if not feasible:
- Trashcans will be stored in garages
SC-6 Additional BMPs Based on Potential Sources of Runoff Pollutants Applied? (must answer for each source listed below)
a. On-site storm drain inlets ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Site will provide prohibitive dumping placards and/or signage and maintain legibility -Signage posted at public access points to deter prohibitive dumping b. Sump pumps or French drains I ❑ Yes ❑ No ❑X N/A Describe how source control will be implemented, or justify if not feasible:
-No Sump pumps or French drains proposed
c. Interior or sub-surface parking garages ❑ Yes ❑ No ❑X N/A Describe how source control will be implemented, or justify if not feasible:
-No parking garages proposed
d. Need for future indoor&structural pest control ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Provide integrated pest management information to owners, lessees and operators. e. Landscape/outdoor pesticide use ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Landscaping will be designed to minimize irrigation and runoff,to promote surface infiltration where appropriate, and to minimize the use of fertilizers and pesticides that can contribute to storm water pollution.
-BMPs will be designed with plants that are tolerant of periodic saturated soil conditions.

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1205 Melrose Way
Form 3, Page 3 of 4
Source Control Requirement Applied?
f. Pools,spas, ponds, decorative fountains, or other water features ❑ Yes ❑ No 0 N/A Describe how source control will be implemented, or justify if not feasible:
-No water features proposed
g. Food preparation and/or service ❑ Yes ❑ No 0 N/A Describe how source control will be implemented, or justify if not feasible:
-No food preparation proposed.
h. Refuse/trash collection areas ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Trash cans will be stored in proposed garages.
i. Industrial processes ❑ Yes ❑ No ❑X N/A Describe how source control will be implemented, or justify if not feasible:
-No industrial processes proposed.
j. Outdoor storage of equipment, chemicals, or materials ❑ Yes ❑ No 0 N/A Describe how source control will be implemented, or justify if not feasible:
-No outdoor storage proposed.
k. Vehicle and equipment cleaning ❑ Yes ❑ No 0 N/A Describe how source control will be implemented, or justify if not feasible:
-No vehicle cleaning proposed.

I. Vehicle/equipment repair and maintenance ❑ Yes ❑ No 0 N/A Describe how source control will be implemented, or justify if not feasible:
-No vehicle cleaning proposed.
m. Fuel dispensing areas ❑ Yes ❑ No 0 N/A Describe how source control will be implemented, or justify if not feasible:
-No fuel dispensing areas proposed

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1205 Melrose Way
Form 3, Page 4 of 4
n. Loading docks ❑ Yes ❑ No ❑X N/A Describe how source control will be implemented, or justify if not feasible:
-No loading docks proposed.
o. Fire sprinkler test water and relief point ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Drain fire sprinkler test water to the sanitary sewer. p. Miscellaneous drain or wash down areas ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Condensate drain lines and roofing to drain to landscaped areas. q. Plaza, sidewalks, parking lots ❑X Yes ❑ No ❑ N/A Describe how source control will be implemented, or justify if not feasible:
-Sidewalks and driveways to be swept. Debris from pressure washing must be collected to prevent entry into the storm drain system. Washwater containing any cleaning agent or degreaser must be collected and discharged to the sanitary sewer and not discharged to a storm drain.

Discussion/justification if SC-6 not implemented. Clearly identify which sources of runoff pollutants are discussed.Justification must be provided for all "No" answers shown above.

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1205 Melrose Way
FORM 4 - SITE DESIGN BMPS FOR ALL DEVELOPMENT PROJECTS

Page 1 of 2 ends

PROJECT IDENTIFICATION
Project Name: 1205 Merlose Way
Permit Application Number P21-0130
All development projects must implement site design BMPs SD-1 through SD-8, unless justification is provided by qualified design professional. See Chapter 4 and Appendix E of the Model BMP Design Manual for information to implement site design BMPs shown in this checklist.

Answer each category below pursuant to the following, and provide description. • "Yes" means the project will implement the site design BMP as described in Chapter 4 and/or Appendix E of the Model BMP Design Manual.
• "No" means the BMP is applicab2le to the project but it is not feasible to implement. • "N/A" means the BMP is not applicable at the project site because the project does not include the feature that is addressed by the BMP (e.g.,the project site has no existing natural areas to conserve).

Site Design Requirement Applied?
SD-1 Maintain Natural Drainage Pathways and Hydrologic Features ❑X ❑ ❑ Yes No N/A
Describe how site design will be implemented, or justify if not feasible:
-Site drainage mimics the existing condition drainage patter and discharge points.

SD-2 Conserve Natural Areas, Soils, and Vegetation I ❑ Yes ❑ No 0 N/A Describe how site design will be implemented, or justify if not feasible:

SD-3 Minimize Impervious Area I ❑X Yes ❑ No ❑ N/A Describe how site design will be implemented, or justify if not feasible:
-Streets and sidewalks designed to mimium widths, provided public safety is not compromised.

SD-4 Minimize Soil Compaction ❑ Yes ❑ No ❑X N/A Describe how site design will be implemented, or justify if not feasible:

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1205 Melrose Way
Form 4, Page 2 of 2
SD-5 Impervious Area Dispersion ❑X Yes I ❑ No ❑ N/A Describe how site design will be implemented, or justify if not feasible:
-Roof drains designed to discharge to landscape.
-Storm water biofiltration basin will effectively receive and treat runoff from impervious areas prior to discharging to the storm drain system.

SD-6 Runoff Collection ❑X Yes ❑ No ❑ N/A Describe how site design will be implemented, or justify if not feasible:
-onsite runoff will be effectively collected, conveyed and discharged via proposed storm drain.

SD-7 Landscaping with Native or Drought Tolerant Species I 0 Yes ❑ No ❑ N/A Describe how site design will be implemented, or justify if not feasible:
-Landscaping design shall consist of native and drought tolerant species.

SD-8 Harvest and Use of Precipitation ❑Yes ❑X No ❑ N/A Note: Worksheet 8.3-1, "Harvest and Use Feasibility'must be included in this section of the SWAMP.

Describe how site design will be implemented, or justify if not feasible:
-Harvesting and using precipitation is not a feasible BMP to implement. See worksheet B.3-1 in attachment 1C.

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1205 Melrose Way
FORM 5 - STRUCTURAL POLLUTANT CONTROL AND

HYDROMODIFICATION MANAGEMENT BMPS

PROJECT IDENTIFICATION
Project Name: 1205 Melrose Way
Permit Application Number P21-0130
PDP Structural BMPs
All PDPs must implement structural BMPs for storm water pollutant control (see Chapter 5 of the BMP Design Manual). Selection of PDP structural BMPs for storm water pollutant control must be based on the selection process described in Chapter S. PDPs subject to hydromodification management requirements must also implement structural BMPs for flow control for hydromodification management (see Chapter 6 of the BMP Design Manual). Both storm water pollutant control and flow control for hydromodification management can be achieved within the same structural BMP(s).

PDP structural BMPs must b27e verified by the local jurisdiction at the completion of construction.This may include requiring the project owner or project owner's representative and engineer of record to certify construction of the structural BMPs (see Section 1.12 of the BMP Design Manual). PDP structural BMPs must be maintained into perpetuity, and the local jurisdiction must confirm the maintenance (see Section 7 of the BMP Design Manual).

Use this form to provide narrative description of the general strategy for structural BMP implementation at the project site in the box below.Then complete the PDP structural BMP summary information sheet (page 3 of this form)for each structural BMP within the project (copy the BMP summary information page as many times as needed to provide summary information for each individual structural BMP).

Describe the general strategy for structural BMP implementation at the site.This information must describe how the steps for selecting and designing storm water pollutant control BMPs presented in Section 5.1 of the BMP Design Manual were followed, and the results (type of BMP selected). For projects requiring hydromodification flow control BMPs, indicate whether pollutant control and flow control BMPs are integrated or separate structures.

Note: Each structural pollutant control and hydromodification management BMP must be clearly identified on a site map (Attachment 1a), and described in supporting table (Attachment 113).

Step 1A:The DMAs draining to the structural BMPs are not self-mitigating, de-minimus, or self-retaining.

Step 16:There are no site design BMPs proposed for the project for which the runoff factor can be adjusted.

Step 2: Harvest and use is not feasible. Refer to Attachment 1c.

Step 3: Infiltration is not feasible. Refer to Attachment 1d.

Step 3C: Biofiltration BMPs have been selected and sized per the design criteria to meet both pollutant control and hydromodification management flow control requirements.

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1205 Melrose Way
FORM 6 - STORMWATER BMP MAINTENANCE MECHANISM

PROJECT IDENTIFICATION
Project Name: 1205 Melrose Way
Permit Application Number P21-0130
Maintenance Requirements
A stormwater structural BMP operations and maintenance plan must be prepared for PDPs. A template plan is available at:
http://www.citvofvista.com/services/city-departments/community-development/building-planning- permits-applications/land-development-autocad-templates/storm-water-forms Has a stormwater structural BMP operations and maintenance plan been prepared? ❑M Yes, included with Attachment 3A
❑ No
All projects are required to maintain designed functionality of structural BMPs in perpetuity. Privately- owned projects must record a Storm Drain Maintenance Agreement with the County of San Diego Assessor's Office. A template Storm Drain Maintenance Agreement is available at:
http://www.citVofvista.com/services/city-departments/community-development/building-planning- permits-applications/land-development-autocad-templates/storm-water-forms Has a Storm Drain Maintenance Agreement been submitted to the County? ❑ Yes, copy included with Attachment 3B
❑X No
❑ Not Applicable (e.g., city-owned property/project)

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1205 Melrose Way
ATTACHMENT 1 - POLLUTANT CONTROLS: SUPPORT DOCUMENT AND

CHECKLIST
Each of the attachments indicated below should be considered for inclusion with the SWAMP. Use this checklist to indicate which attachments are included behind this coversheet.

Attachment Contents Checklist
Sequence
Attachment 1A Drainage Management Area (DMA) ❑X Included Exhibit
See DMA Exhibit Checklist on next page.

Attachment 1B Tabular Summary of DMAs Showing ❑X Included on DMA Exhibit in Attachment 1A DMA ID matching DMA Exhibit, DMA
Area, DMA Type, and BMPs*
❑ Included as Attachment 1B
*Provide table in this Attachment OR on
DMA Exhibit in Attachment 1A
Attachment 1C Harvest and Use Feasibility Screening ❑X Included Checklist (Worksheet B.3-1)
❑ Not included because the entire project
Refer to Appendix B.3-1 of the BMP will use Infiltration BMPs Design Manual.

Attachment 1D Categorization of Infiltration Feasibility ❑X Included Condition (Worksheet C.4-1)
❑ Not included because the entire project
Refer to Appendices C and D of the BMP will use Harvest and Use BMPs Design Manual.

Attachment 1E Pollutant Control BMP Design ❑X Included Worksheets and Calculations
Refer to Appendices B and E of the BMP
Design Manual for structural pollutant
control BMP design guidelines

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1205 Melrose Way
ATTACHMENT 1A - DMA EXHIBIT CHECKLIST
For Attachment 1A, provide map(s)for the project site,titled "DMA Exhibit."The checklist below identifies minimum elements that must be included with the DMA Exhibit. ❑ Underlying hydrologic soil group
❑ Approximate depth to groundwater
❑ Existing natural hydrologic features (watercourses, seeps, springs,wetlands, etc.) ❑ Critical coarse sediment yield areas to be protected
❑ Existing topography and impervious areas
❑ Existing and proposed site drainage network and storm drain structures ❑ Proposed connections to offsite drainage
❑ Proposed demolition
❑ Proposed grading
❑ Proposed impervious features
❑ Proposed design features and surface treatments used to minimize imperviousness ❑ Drainage management area (DMA) boundaries
❑ DMA identification numbers (DMA ID)
❑ DMA areas (square footage or acreage)
❑ DMA type (Drains to BMP, Self-mitigating, De Minimis, or Self-retaining) ❑ Potential pollutant source areas and corresponding required source controls (see Form 2 and Form 3 of SWAMP, BMP Design Manual Chapter 4 and Appendix E.1) ❑ Proposed Structural BMPs (see Form 5 of SWAMP)

Page 32 of 38 ends

TG PER PLAN FREEBOARD
DEN
BRUg1 SEE TABLE HEREON I
L 3 PVC SCREW CAP 6 WSE � / 3636 BROOKS BOX i T I3657 `` ` t l / _ � _� - - ,, / / I III = -_ - ABOVE GRADE CONIC
I / " �` - �- f - « -III-III-III- - CARER PANSA PLANTING, 3705 � (� 364.E �-- � �S CONC 4 x / «IOLA� I II 1111 DENSE ��_ - III _ OR APPROVED OTHER, 6 WEIR c� ----------------------- o / I I /� TREES / _ I III - - -t=3 9 -� '�_ - I -III-III- ?1 PER LANDSCAPE PLANS Q z 5o O CON
.y D NSE / s _
I . 7 / � �3666 /3�6 /3636 ;I "� ) 1 B USH„ 1 � ` ` 2:1 (SELF-MITIGATING 4 w =� �- � o z I r EXISTING ACC�C S VE -�, �� - - - "I� I =III=I - FIG PER PLAN 2.5' INLET 12"WEIR p w w /\//\�/ / / / I II1,755 SF _ ' WEIR NOTCH PONDING LU _ /\/\\%\\%
I - - - - - - - - - - - -„--�,--r, ,->� - - _ '/ � 1 I \` \\ III I- ��J EXTEND AND WRAP LINER 12" MIN. -III=III_ -- �/\//\////\\/ I I �94// 1361 III -III-I I 1=1 I 1=1 I 1=III-III-III III-III-III III-III-III -I Imo\ \\ ENGINEERED FILL LAYER SHALL BE I I / I 1 \- �\ III I r PAST EDGE OFBERM -III-III-III-III-III-III-I °° -III-III-III-III-III-I =� / MINIMUM 18" DEEP"SANDY LOAM" SOIL 370.5 x / I 365.6 / / 3626
I � �O6 \, I ► I " ,-I III-I�I-III-III-III-III III-III-I I III-III-III I I-I I I I I \ / / I I x / I \ II III I = MIX WITH NO MORE THAN 5% CLAY I 1 3665 ( 3636 I \ 36,5 I I TDENSE REES I - III-III-III-III-III-I I-III-III- -III-III-I - , CONTENT. PERCOLATION RATE I I 37L6 / I I x x I I, Q N BACKFILL IN BASIN,AND TO 5' OUTSIDE -I I I I -I I I-I I I-III-III-III III-III-III III-III-III I- \\/\\ I I 3696� / I O 1 °°NC , �34N4C _ 5-101N/HR MINIMUM.

I I / I - III I: Q I( II JIJI- I 347. SHALL CONSIST OF A 2-SACK MIX OF =1 1=1 1=1 1=1 =I =I�=I I I=I =I I =I I =I \ / I , s > l / I3656 I W \ I","I III s > 348f L LI L _ /\ n I I I ,: / I 3625 I , \_ J_35R5 _ w Il r r a a v`r _ IIJII JI4Z9 0 34.6 SLURRY -III=I \\/ 3 NON PERFORATED rIL I I / STANDPIPE 364.E I I D 3676 13 _ o �I I ~~ L - - ~I 'I - ____ ---- BOTTOM AND SIDES OF FLOW THROUGH PLANTER SHALL BE -I I \\\ a I ~ CONC , ' ' ' ' `M1 3464 -348- a- FLU 3665 / I Q I- - \ f Ilal ENSE ~ - ~"I r I x 35 34 ASPH - - _ LINED WITH 30 MIL PVC MEMBRANE THAT IS COVERED BY A _I I - - PERMAVOID LAYER ASPH MINIMUM OF 12 INCHES OF CLEAN SOIL, FREE FROM ROCKS I- Ix5 "' r 1 I I \\` ` ` ` -` 6J - AND DEBRIS,WITH A MAXIUM 3:1WITH A MAXIMUM 3:1 -III=III= QJG / /� \/\/\ WATER TIGHT CAP ON ,� � �- x '�\\ a,as .�x.B -#`��o= - - - - - - -=COND=== -III-I I / / / / \i\\/\\/\\/\ \\/\\/\\/\\/\� . �J- HORIZONTAL:VERTICAL[H:V]) SLOPE INCLINATION, ORTERMINAL END OF PIPE � , ` , SELF-MITIGATING (
aR� \ , \ DENSE - ^ FLATTER,AND MEETS THE FOLLOWING MINIMUM / FLOW CONTROL ORIFICE 6" DIAMETER PERFORATION PVC I I / 1 \ _TREES _ _ - 3 9 SF 3624 I \ I s \� _ _____ - ___ i_ SPECIFICATIONS: o PLATE PER DETAIL SUBDRAIN SHALL BE ENCAPSULATED IN - l - - -- - - ��- - -1- - - 9'G GRAVEL. GRAVEL AND SUBDRAIN SHALL °"°°g°"- SPECIFIC GRAVITY(ASTM D792): 1.2(G/CC, MIN.);TENSILE -�
- - - -- - BASIN WITH - �+�-��- OUTFACE PIPE BE WRAPPED IN MIRAFI 140N OR EQUAL. ��4 -1, � � (ASTM D882): 73 (LB/IN WIDTH, MIN); ELONGATION AT BREAK CONNECTION TO CATCH \ ' 361`. LOT A \ \ " 3sR \ (ASTM D882 380 %, MIN MODULUS ASTM D882 30 MIRAFI 140N OR EQUAL 2 DENSE � \ )� ( ), ( )• DRILLED ORFICE PLATE / / \ r \ (LB/IN-WIDTH, MIN.);AND TEAR STRENGTH (ASTM D1004): 8 (NON-WOVEN GEOTEXTILE) TREES "NOTE:(LB/IN, MIN); SEAM SHEAR STRENGTH (ASTM D882)58.4(LB/IN, **NOTE: BACKFILL FOR STORM DRAIN PIPES ENTERING OR EXISTING \ FIG 357.6 MIN); SEAM PEEL STRENGTH (ASTM D882) 15 (LB/IN, MIN). BASIN SHOULD BE BACKFILLED WITH A 2-SACK MIX OF SLURRY DENSE
BRUSH ,�.� r r = ` ` ` ` \ 360 �,300 SF � \ a PROVIDE 18-INCH OVERLAPPED,TAPED OR MIN 6 3 \\ `` = r = ° ` ` GLUED SEAMS AT ALL SEAMS. PLACE 3„ l ORFICE PLATE MIN. SQUARE DIMENSIONS 1.0 FT \ I \ 352.5 NON-WOVEN FILTER FABRIC(MIRAFI 140N OR 1 GREATER THAN PIPE DIA. HOT-DIP GALVANIZED 3 \" 3535 \ASPH x EQUAL) ON EITHER SIDE OF PVC LINER TO PROTECT LINER PLATE AFTER HOLES HAVE BEEN DRILLED FROM PUNCTURE ON ALL SIDES, "SANDWHICHING"THE PVC INFLOW PIPE } LINER WITH A FABRIC CUSHION.
364.7 \ \ I'' \ 36 I I \ \ SELF-MITIGATING ~ \� 359.E I \ \ x5 « SIZE OF DRILLED ORFICE PER 2,054 SIF ~ I \ t 45 BIOFILTRATION BASIN TABLE o s / , � _ 112" MAX DENSE I I 3636 I \ ~" \ DMA 1- ° " TABLE HEREON / BRUSH I I � = BASIN NO. ENGINEERED PERMAVOID TOTAL FREE ORIFICE / s r r r t a \ t t BRUSH3555 „ 3653 5 « = SOIL LAYER LAYER PONDING BOARD355 3l8" DIA. HOLE I1 TDENSEREES O4 \ ~ y �«� = 1 18" 38.4" 12" 1.0' 1.5" FLOW CONTROL ORFICE PLATE 367.6 c
\ 3645 _
- BIOFILTRATION BASIN DETAIL
BRUSH DENSE " 3�=
TREES 35F 5 3573�
365.E I / « "
3677 N.T.S.

L
362.7 \
\ \ 364.5 Ir \ -� , DMA DATA TABLE I \ BRUSH \ � \ - DMA NO. IMPERVIOUS PERVIOUS TOTAL \ 3666 ) 3656 - / \ \ O \ ` - AREA(S.F.) AREA(S.F.) AREA(S.F.) / DENSE ~
359.J r-
t 368.7 \ \ l ,", ~ \ 36x` I I , , s , 369.3 'Q \ 367�.6 I 1 TREES y I \ 3684 \ \ s s , , , , , ` � ~ w 1-1 53,174 52,620 105,794 LU
\ \�\ - 365- \ N 360.5 2-1 5,171 537 5,708 ASPH
�16. 4 (~/) - - SELF-
.. . . . . 361.5
I t r r r \ ----- -----� r-� U I - �� MITIGATING 4,188SF BMP NOTES II \^ -
3695 l / 36� \ \\ I I Z \ ROCKS M` ` ` Q 0 I DE-MINIMUS 275 SF 1. THESE BMPS AREA MANDATORY TO BE INSTALLED PER MANUFACTURER'S _ _.3 CONC 3696 \ 3676 I ^^ I 364.4 \\ -36¢- 3636 BRUSH M / L AREA RECOMMENDATIONS OR THERE PLANS I I 3695 x II \ x \ 366.4 \ � '}_ .

LO ' I I INFEASIBLE 2. NO CHANGES TO THE PROPOSED BMPS ON THIS SHEET WITHOUT PRIOR APPROVAL 6%.4 ` _ ` C'�'D 9 , 9 'r~ I TO ----- ----- 2,346 SF FORM THE CITY ENGINEERING DEPARTMENT 6 1 , r I I TREAT 3. NO SUBSTITUTIONS TO THE MATERIAL TYPES OR PLANTING TYPES WITHOUT PRIOR BRUSH APPROVAL FROM THE LAND DEVELOPMENT ENGINEER 3646 36 I I I 4. NO OCCUPANCY WILL BE GRANTED UNTIL THE CITY INSPECTOR STAFF HAS I I p J \\ \ 3676 """ \\ \� INSPECTED THIS PROJECT FOR APPRORIATE BMP CONSTRUCTION AND I370.E I « p IT ' = '�' x � �, 5 36s546 I I GENERAL INFORMATION INSTALLATION. 3694 \"� \ , ' ' ' ' \ ', , ' • ',, , , , _ ° ' 1 I I I PROJECT SITE IS LOCATED IN THE LOS MONOS H.S.A. (904.31)OF I 3704 \ _ \ « O ~ I I 3646 AGUA HEDIONDA CREEK H.A. OF CARLSBAD H.U., HOWEVER WATER QUALITY TECHNICAL REPOT I \ , " 3656 - - Z - J I DRAINAGE FROM THE SITE ULTIMATELY DISCHARGES TO THE I I 37�'4 \\ 3704 •` " \- � 368.5 , '^ x = I o © 3647 RECIEVING WATERS OF BUENA VISTA CREEK H.S.A. (904.22)OF TITLE PRIORITY DEVELOPMENT PROJECT STORM WATER QUALITY I « Y I{1\ BUENA VISTA CREEK H.A. OF CARLSBAD H.U. 3687 H � � Y \ a r r a t x , , � \- - - - _ � w --- - - - - I MANAGEMENT REPORT FOR 1205 MELROSE WAY B I DATE-MARCH 2021
- :5 064 I POLUTTANTS OF CONCERN-BENTHIC COMMUNITY EFFECTS, 4 O� q I I -I PREPARED BY-PASCO LARET SUITER&ASSOCIATES

BIFENTHRIN, SELENIUM, TOXICITY, INDICATOR BACTERIA,
I3:/4 371.8 \ I ;- \ \}�� ' ' ' ' ' ' ' ' ' _ \ _ " I�i NUTRIENTS,AND SEDIMENTATION/SILTATION 3 z26 \ I x 377.5 \ t` r JT..6 s \ J - �372.3 \ \ slat , x ` 37Q8 -- 5- I M 4` 49 101 MAINTENANCE AGREEMENT DOCUMENT 3732
- 3726 q t ~" , \\1 I37RB I DECK 36:3 � I LID SITE DESIGN BMP'S 3703
x 3705 \ - -�L � I \`" �365f -r I TITLE- \ DECK POOL 3 - 1 y\ �" x r II I 1. BIOFILTRATION BASIN DATE- 725I/ r ' ' I L L, I I v/ I I , , III PREPARED BY- I \ �x I/ J73.5 I l o l 13709 I I / -r 1 1 "" I (/ « II 3735 , J x I �J Ihhhh' I I I^^" / 37f.3 CONp 2. ROOF DRAIN TO LANDSCAPING x -DECK 3. MINIMIZE IMPERVIOUS SURFACES -a � -comic L ._ I I �- _ _ I�� I _ _ � OPERATIONS AND MAINTENANCE PLAN �f 370.5 \
I \ 370.9 I
/ I I « t r�CON�
o - -� 37x5 1 �a~ , , , > , , , I I I \ r - 1 ,�h , , 4. PROTECT SLOPES AND CHANNELS Q " 3743 �'r \ 9--i -'-'' /�^ - I 369.3\«,- I .85 « r I r , > TITLE-STORM WATER OPERATIONS& MAINTENANCE PLAN FOR 1205 MELROSE WAY o I - r alsJt 374.E x o C-NC- I I I « ~ I j3649 DATE-MARCH 2O21 AS I x 5. TREE WELLS
x 374.s I ` - D 14 I I I V /I z 364B I PREPARED BY-PASCO LARET SUITER&ASSOCIATES 3755 � x
Cl) S6� d37.8 La � DENSER I^\EE �� 2= .51 �st� SOURCE CONTROL BMP'S L - - ' � _ DES \ �� ` I 364B r � RESPONSIBLE PARTY INFORMATION x - \ 375..6 " �� , , , TREE WELL#1fV52 I ASP" ":' 376.5it` " f�, > �o =� ` ` /AREA 275 SF I� 1. STORM DRAIN STENCILING w _ I"-
6 3767 DE-MINIMIS 3642 . ZORAN DJORDJEVICH I J76.7
x 3764 ELROSE qY `�\ 3727 , 'r r ` a r a r ` a r ,` ` 2. EMPLOY INTEGRATED PEST MANAGEMENT PRACTICES d 378..5 376.8 �- x 375.7 x " ' - r a - 4 i _ _ ° ` _ 551 LYNWOOD DRIVE SIGN 0 • -� 374.4 / 3734 \ l /P`` 6 \ / 6 " 4 i CONC 375..7 \ - �� 37,.7 / / 2,346 SF / _ _ SOIL INFORMATION LEGEND
x 3646 J 3638
-
�� a ^ \ -2 3636 -�- w ', N ` - - - ��_ - �M- -_ 44 CNC _ DESCRIPTION SYMBOL o HYDROLOGIC SOIL GROUP:TYPE D LOT NUMBER 10
co
CIO
m
POST-CONSTRUCTION PERMANENT BMP OPERATION GROUND WATER INFORMATION DRAINAGE DIRECTION & MAINTENANCE PROCEDURE DETAILS
GROUND WATER WAS NOT ENCOUNTERED AT THE SITE. SEE DRAINAGE MANAGEMENT AREA g 0 40 80 120 REPORT PREPARED BY: GEOSOILS, INC Li STORM WATER MANAGEMENT AND DISCHARGE CONTROL MAINTENANCE DATED: MARCH 5, 2021 W.O. 8058-A-SC TYPE-B CURB INLET Z AGREEMENT APPROVAL NO: BROOKS BOX ❑ SCALE: 1" =40' 0&M RESPONSBILE PARTY DESIGNEE: PACIFIC INTERNATIONAL INVESTMENTS, INC N HORIZONTAL DATUM: NAD 83 COARSE SEDIMENT YIELD RIP RAP BMP ID# BMP TYPE SYMBOL QUANTITY DETAIL PLAN DETAIL CONSTRUCTION BMP DESCRIPTION INSPECTION MAINTENANCE MAINTENANCE METHOD QUANTITY SHEET SET SHEET NO. NO. NORTHING FASTING CONFIRMATION FREQUENCY FREQUENCY NUMBER(S) w 30 REFER TO SEDIMENT MENTYIELD A A THIS REPORT FOR CRITICAL PASCO CARET SUITER � O LAONDSDRAIN
INGO PAD)(TWO
PER EDUCATION PROGRAM (SOURCE CONTROL) ANNUAL AS NEEDED EMPLOYEE EDUCATION PROGRAM N/A N/A COARSE SEDIMENT YIELD AREAS WITHIN THIS PROJECT SITE. DMA EXHIBIT 0 a O BIOFILTRATION 1 SIGNAGE &STENCILING ANNUAL AS NEEDED REPAIR AND/OR REPLACE AS 3 N/A 1205 MELROSE WAY o ASSG ATES N AREA
NECESSARY VISTA, CA
STORM DRAIN MOWING AND DEBRIS COLLECTION San Diego I Solana Beach I Orange County CD O STENCILING • 3 BIOFILTRATION BASIN ANNUAL AS NEEDED AS NECESSARY. REPAIR AS NEEDED 1 N/A SCALE: 1'=40' Phone 858.259.82121 www. isaen ineerin com CD DATE:AUGUST 2021 P g g• 0 Fo
TREE WELL 2 TREE WELL MONTHLY AS NEEDED INSPECT TREE HEALTH& 2 N/A SHEET 1 OF 1

REPAIR/REPLACE AS NECCESSARY

ATTACHMENT 1c

Harvest and Use Feasibility Checklist 1205 Melrose Way Harvest and Use Feasibility S

1.Is there a demand for harvested water((check all that apply) at the project site that is reliably present during the wet season?
v Toilet and urinal flushing
� Landscape irrigation
Other:

2. If there is a demand; estimate the anticipated average wet season demand over a period of 36 hours.

Guidance for planning level demand calculations for toilet/urinal flushing and landscape irrigation is provided in Section B.3.2.

Toilet/Urinal Flushing
(9.3 gal/person-day)x(0.13368 cuft/gal)x(1.5 days) = 1.86 cuft/person-36hr Assume (3 people per house x 15 houses)x(1.86 cuft/person-36 hr)=84 cuft/36hr Landscape Irrigation
(1.37 ac irrigated)x(1470 gal/ac-36hr)x(0.13368 cuft/gal) =270 cuft/36hr Total=84 cuft+270 cuft= 354 cuft

3. Calculate the DCV using worksheet B-2.1.

DCV=3,404 cult
3a. Is the 36-hour demand greater than 3b. Is the 36-hour demand greater than 3c.Is the 36-hour demand less or equal to the DCV? 0.25DCV but less than the full DCV? than 0.25DCV? Yes / d No Yes / d No v Yes Harvest and use appears to be feasible. Harvest and use may be feasible. Conduct V Harvest and use is Conduct more detailed evaluation and more detailed evaluation and sizing considered to be infeasible. sizing calculations to confirm that DCV calculations to determine feasibility. Harvest can be used at an adequate rate to meet and use may only be able to be used for a drawdown criteria. portion of the site,or(optionally) the storage may need to be upsized to meet long term
capture targets while draining in longer than
36 hours.

ATTACHMENT 1d

Appendix C: Geotechnical and Groundwater Investigation requirements Worksheet C.4-1: Categorization of Infiltration Feasibility Condition Categorization of Infiltration1 1 1 1 1 Part 1-Full Infiltration Feasibility Screening Criteria Would infiltration of the full design volume be feasible from a physical perspective without any undesirable consequences that cannot be reasonably mitigated?
Criteria Screening Question Yes No
Is the estimated reliable infiltration rate below proposed facility locations 1 greater than 0.5 inches per hour?The response to this Screening Question must X be based on a comprehensive evaluation of the factors presented in Appendix C.2 and Appendix D.

Provide basis: The USDA indicates that the site is underlain by Bosanko Clay(BsD)and Placentia sandy loam (PeC2),which are noted to have infiltration rates varying from 0.00 to 0.06 inches/hour,and is categorized as Hydrologic Soil Group"D". Furthermore,a reasonable design infiltration rate(without application of correction/ safety factors)of 0.025 inches/hour is indicated for Hydrologic Soil Group"D"soils,which is less than 0.50 inches/hour.