HomeMy WebLinkAboutCT 2018-0005; VILLAGE WALK; PDP STORM WATER QUALITY MANAGEMENT PLAN; 2018-05-23,,.. ...
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CITY OF
CARLSBAD
PRIORITY DEVELOPMENT PROJECT (PDP) STORM
WATER QUALITY MANAGEMENT PLAN (SWQMP) FOR
VILLAGE WALK
PROJECT ID: CT2018-0005
DRAWING NUMBER: TBD
ENGINEER OF WORK:
LUIS A. PARRA, PhD, CPSWQ, ToR, D. WRE. R.C.E. 66377
MAY 3 0 2018
CITY C"" C./ '' 'J
PLI' 1;·,i,~G u,·✓, ; I
PREPARED FOR:
OMS Consultants, Inc .
12371 S Lewis St #203,
Garden Grove, CA 92840
(714) 740-8840
PREPARED BY:
REC CONSULTANTS, INC.
2442 SECOND AVENUE
SAN DIEGO, CALIFORNIA 92101
(619) 232-9210
DATE:
May 23, 2018
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TABLE OF CONTENTS
Certification Page
Project Vicinity Map
FORM E-34 Storm Water Standard Questionnaire
Site Information
FORM E-36 Standard Project Requirement Checklist
Summary of PDP Structural BMPs
Attachment 1: Backup for PDP Pollutant Control BMPs
Attachment 1a: DMA Exhibit
Attachment 1 b: Tabular Summary of DMAs and Design Capture Volume Calculations
Attachment 1 c: Harvest and Use Feasibility Screening (when applicable)
Attachment 1d: Categorization of Infiltration Feasibility Condition (when applicable)
Attachment 1 e: Pollutant Control BMP Design Worksheets I Calculations
Attachment 2: Backup for PDP Hydromodification Control Measures
Attachment 2a: Hydromodification Management Exhibit
Attachment 2b: Management of Critical Coarse Sediment Yield Areas
Attachment 2c: Geomorphic Assessment of Receiving Channels
Attachment 2d: Flow Control Facility Design
Attachment 3: Structural BMP Maintenance Thresholds and Actions
Attachment 4: Single Sheet BMP (SSBMP) Exhibit
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CERTIFICATION PAGE
Project Name: Village Walk
Project ID: TBD
I hereby declare that I am the Engineer in Responsible Charge of design of storm water BMPs
for this project, and that I have exercised responsible charge over the design of the project as
defined in Section 6703 of the Business and Professions Code, and that the design is consistent
with the requirements of the BMP Design Manual, which is based on the requirements of
SDRWQCB Order No. R9-2013-0001 (MS4 Permit) or the current Order .
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 SWQMP has been completed to the best of my ability
and accurately reflects the project being proposed and the applicable source control and site
design 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 SWQMP 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 .
r of Work's Signature, R.C.E. 66377, Expiration 6/30/18
Luis Parra
REC Consultants, Inc .
May 23, 2018
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Carlsbad
STORM WATER STANDARDS
QUESTIONNAIRE
Development Services
Land Development Engineering
1635 Faraday Avenue
(760) 602-2750
www.carlsbadca.gov
E-34
I INSTRUCTIONS:
To address post-development pollutants that may be generated from development projects, the city requires that new
development and significant redevelopment priority projects incorporate Permanent Storm Water Best Management
Practices (BMPs) into the project design per Carlsbad BMP Design Manual (BMP Manual). To view the BMP Manual,
refer to the Engineering Standards (Volume 5).
This questionnaire must be completed by the applicant in advance of submitting for a development application
(subdivision, discretionary permits and/or construction permits). The results of the questionnaire determine the level of
storm water standards that must be applied to a proposed development or redevelopment project. Depending on the
outcome, your project will either be subject to 'STANDARD PROJECT' requirements or be subject to 'PRIORITY
DEVELOPMENT PROJECT' (PDP) requirements.
Your responses to the questionnaire represent an initial assessment of the proposed project conditions and impacts. City
staff has responsibility for making the final assessment after submission of the development application. If staff
determines that the questionnaire was incorrectly fi lled out and is subject to more stringent storm water standards than
initially assessed by you, this will result in the return of the development application as incomplete. In this case, please
make the changes to the questionnaire and resubmit to the city.
If you are unsure about the meaning of a question or need help in determining how to respond to one or more of the
questions, please seek assistance from Land Development Engineering staff.
A completed and signed questionnaire must be submitted with each development project application. Only one
completed and signed questionnaire is required when multiple development applications for the same project are
subm itted concurrently.
PROJECT INFORMATION
PROJECT NAME: VILLAGE WALK PROJECT ID: CT2018-0005
ADDRESS : 341 -47 OAK AVENUE, CARLSBAD, CALIFORNIA 92008 APN: 203-260-05
The project is (check one): D New Development Ill Redevelopment
The total proposed disturbed area is: 16,798 ft2 ( 0.386 ) acres
The total proposed newly created and/or replaced impervious area is: 11 ,701 ft2 ( 0.26 ) acres
If your project is covered by an approved SWQMP as part of a larger development project, provide the project ID and the
SWQMP # of the larger development project:
Project ID CT2018-0005 SWQMP#: N/A
Then, go to Step 1 and follow the instructions. When completed, sign the form at the end and submit this with your
application to the city.
E-34 Page 1 of 4 REV 02/16
STEP 1
TO BE COMPLETED FOR ALL PROJECTS
To determine if your project is a "development project", please answer the following question:
YES NO
Is your project LIMITED TO routine maintenance activity and/or repair/improvements to an existing building • Ill or structure that do not alter the size (See Section 1.3 of the BMP Design Manual for guidance)?
If you answered "yes" to the above question, provide justification below then go to Step 5, mark the third box stating "my
project is not a 'development project' and not subject to the requirements of the BMP manual" and complete applicant
information.
Justification/discussion: (e.g. the project includes only interior remodels within an existing building):
If you answered "no" to the above question, the project is a 'development project', go to Step 2.
STEP2
TO BE COMPLETED FOR ALL DEVELOPMENT PROJECTS
To determine if your project is exempt from PDP requirements pursuant to MS4 Permit Provision E.3.b.(3), please answer
the following questions:
Is your project LIMITED to one or more of the following:
YES NO
1. Constructing new or retrofitting paved sidewalks, bicycle lanes or trails that meet the following criteria:
a) Designed and constructed to direct storm water runoff to adjacent vegetated areas, or other non-
erodible permeable areas; • Ill b) Designed and constructed to be hydraulically disconnected from paved streets or roads;
c) Designed and constructed with permeable pavements or surfaces in accordance with USEPA
Green Streets quidance?
2. Retrofitting or redeveloping existing paved alleys, streets, or roads that are designed and constructed in • Ill accordance with the USEPA Green Streets guidance?
3. Ground Mounted Solar Array that meets the criteria provided in section 1.4.2 of the BMP manual? • Ill
If you answered "yes" to one or more of the above questions, provide discussion/justification below, then go to Step 5, mark
the second box stating "my project is EXEMPT from PDP ... " and complete applicant information.
Discussion to justify exemption ( e.g. the project redeveloping existing road designed and constructed in accordance with
the USEPA Green Street guidance):
If you answered "no" to the above questions, your project is not exempt from PDP, go to Step 3.
E-34 Page 2 of 4 REV 02/16
I STEP3
TO BE COMPLETED FOR ALL NEW OR REDEVELOPMENT PROJECTS
To determine if your project is a PDP, please answer the following questions (MS4 Permit Provision E.3.b.(1)):
YES NO
1. Is your project a new development that creates 10,000 square feet or more of impervious surfaces
collectively over the entire project site? This includes commercial, industrial, residential, mixed-use, lll • and public development projects on public or private land.
2. Is your project a redevelopment project creating and/or replacing 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 • 121 more of impervious surface? This includes commercial, industrial, residential, mixed-use, and public
development projects on public or private land.
3. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a restaurant? A restaurant is
a facility that sells prepared foods and drinks for consumption, including stationary lunch counters and • Ill
refreshment stands selling prepared foods and drinks for immediate consumption (Standard Industrial
Classification (SIC) code 5812).
4. Is your project a new or redevelopment project that creates 5,000 square feet or more of impervious
surface collectively over the entire project site and supports a hillside development project? A hillside • lll
development project includes development on any natural slope that is twenty-five percent or greater.
5. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a parking lot? A parking lot is lll • a land area or facility for the temporary parking or storage of motor vehicles used personally for
business or for commerce.
6. Is your project a new or redevelopment project that creates and/or replaces 5,000 square feet or more
of impervious surface collectively over the entire project site and supports a street, road, highway • lll freeway or driveway? A street, road, highway, freeway or driveway is any paved impervious surface
used for the transportation of automobiles, trucks, motorcycles, and other vehicles.
7. Is your project a new or redevelopment project that creates and/or replaces 2,500 square feet or more
of impervious surface collectively over the entire site, and discharges directly to an Environmentally
Sensitive Area (ESA)? "Discharging Directly to" includes flow that is conveyed overland a distance of • lll
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).*
8. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square
feet or more of impervious surface that supports an automotive repair shop? An automotive repair • lll shop is a facility that is categorized in any one of the following Standard Industrial Classification (SIC)
codes: 5013, 5014, 5541, 7532-7534, or 7536-7539.
9. Is your project a new development or redevelopment project that creates and/or replaces 5,000 square
feet or more of impervious area that supports a retail gasoline outlet (RGO)? This category includes • lll RGO's that meet the following criteria: (a) 5,000 square feet or more or (b) a project Average Daily
Traffic (ADT) of 100 or more vehicles per day.
10. Is your project a new or redevelopment project that results in the disturbance of one or more acres of land • lll and are expected to generate pollutants post construction?
11 . Is your project located within 200 feet of the Pacific Ocean and (1) creates 2,500 square feet or more of
impervious surface or (2) increases impervious surface on the property by more than 10%? (CMC • lll
21 .203.040)
If you answered "yes" to one or more of the above questions, your project is a PDP. If your project is a redevelopment
project, go to step 4. If your project is a new project, go to step 5, check the first box stating "My project is a PDP ... "
and complete applicant information.
If you answered "no" to all of the above questions, your project is a 'STANDARD PROJECT.' Go to step 5, check the
second box stating "My project is a 'STANDARD PROJECT' ... " and complete applicant information.
E-34 Page 3 of 4 REV 02/16
STEP4
TO BE COMPLETED FOR REDEVELOPMENT PROJECTS THAT ARE PRIORITY DEVELOPMENT PROJECTS (PDP)
ONLY
Complete the questions below regarding your redevelopment project (MS4 Permit Provision E.3.b.(2)):
YES NO
Does the redevelopment project result in the creation or replacement of impervious surface in an amount
of less than 50% of the surface area of the previously existing development? Complete the percent
impervious calculation below:
Existing impervious area (A) = 8,574 sq. ft. • Ill
Total proposed newly created or replaced impervious area (B) = 11 ,701 sq. ft.
Percent impervious area created or replaced (B/A)*100 = 136% %
If you answered "yes", the structural BMPs required for PDP apply only to the creation or replacement of impervious
surface and not the entire development. Go to step 5, check the first box stating "My project is a PDP ... " and complete
applicant information.
If you answered "no," the structural BMP's required for PDP apply to the entire development. Go to step 5, check the
check the first box stating "My project is a PDP ... " and complete applicant information.
STEPS
CHECK THE APPROPRIATE BOX AND COMPLETE APPLICANT INFORMATION
Ill My project is a PDP and must comply with PDP stormwater requirements of the BMP Manual. I understand I must
prepare a Storm Water Quality Management Plan (SWQMP) for submittal at time of application.
0 My project is a 'STANDARD PROJECT' OR EXEMPT from PDP and must only comply with 'STANDARD PROJECT'
stormwater requirements of the BMP Manual. As part of these requirements, I will submit a "Standard Project
Requirement Checklist Form E-36" and incorporate low impact development strategies throughout my project.
Note: For projects that are close to meeting the PDP threshold, staff may require detailed impervious area calculations
and exhibits to verify if 'STANDARD PROJECT' stormwater requirements apply.
D My Project is NOT a 'development project' and is not subject to the requirements of the BMP Manual.
Applicant Information and Signature Box
REC CONSULTANTS
Applicant Name: Luis Parra, REC Consultants Applicant Title: Director of Water Resources
Applicant Signature: ~ Date: 04/12/2018
.. • Environmentally Sens1t1ve Areas include but are not limited to all Clean Water Act Section 303(d) impaired water bodies; areas designated as Areas of Special
Biological Significance by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and amendments); water bodies
designated with the RARE beneficial use by the State Water Resources Control Board (Water Quality Control Plan for the San Diego Basin (1994) and
amendments); areas designated as preserves or their equivalent under the Multi Species Conservation Program within the Cities and County of San Diego; Habitat
Management Plan; and any other equivalent environmentally sensitive areas which have been identified by the City.
Th' B fi c· U O I IS ox or ,tv se n1y
YES NO
City Concurrence: • •
By:
Date:
Project ID:
E-34 Page 4 of 4 REV 02/16
SITE INFORMATION CHECKLIST
Project Summary Information
Project Name Village Walk
Project ID CT2018-0005
Project Address 341-347 OAK AVENUE, CARLSBAD,
CALIFORNIA 92008
Assessor's Parcel Number(s) (APN(s)) 203-260-05
Project Watershed (Hydrologic Unit) Carlsbad 904
Parcel Area
0.386 Acres (16,798 Square Feet)
Existing Impervious Area
0.2 Acres (8,574 Square Feet) (subset of Parcel Area)
Area to be disturbed by the project
0.386 Acres (16,798 Square Feet) (Project Area)
Project Proposed Impervious Area
0.264 Acres (11,741 Square Feet) (subset of Project Area)
Project Proposed Pervious Area
0.122 Acres (5,055 Square Feet) (subset of Project Area)
Note: Proposed Impervious Area + Proposed Pervious Area = Area to be Disturbed by the
Project.
This may be less than the Parcel Area.
Description of Existing Site Condition and Drainage Patterns
Current Status of the Site (select all that apply):
~ Existing development • Previously graded but not built out • Agricultural or other non-impervious use • Vacant, undeveloped/natural
Description / Additional Information:
The project site is currently two single-family homes with access road, a detached shed and pool
area, the rest of the area is landscaped area.
Existing Land Cover Includes (select all that apply):
~ Vegetative Cover
~ Non-Vegetated Pervious Areas
~ Impervious Areas
Description / Additional Information:
The existing site includes two (2) residential structures, two (2) servicing sheds, an access
driveway and parking space. The remainder of the site is vegetated.
Underlying Soil belongs to Hydrologic Soil Group (select all that apply):
D NRCS Type A
~ NRCS Type B
D NRCS Type C
D NRCS Type D
Approximate Depth to Groundwater (GW):
D GW Depth < 5 feet
• 5 feet < GW Depth < 10 feet
~ 1 0 feet < GW Depth < 20 feet • GW Depth > 20 feet
Existing Natural Hydrologic Features (select all that apply):
• Watercourses • Seeps • Springs
• Wetlands
~None
Description / Additional Information:
Description of Existing Site Topography and Drainage [How is storm water runoff conveyed from
the site? At a minimum, this description should answer (1) whether existing drainage
conveyance is natural or urban; (2) describe existing constructed storm water conveyance
systems, if applicable; and (3) is runoff from offsite conveyed through the site? if so, describe]:
In existing conditions, the Village Walk project site is a residential area with two (2) houses and
landscape area. Runoff from the existing site drains to an existing storm drain located within Oak
Avenue to the north of the project site.
Per Plate B-1 of the City of Carlsbad Master Plan of Drainage Facilities, the storm drain
converges with a master storm drain to the west of Oak Avenue, ultimately discharging to the
Agua Hedionda Lagoon approximately 1.1 miles south of the project site.
Description of Proposed Site Development and Drainage Patterns
Project Description / Proposed Land Use and/or Activities:
The proposed project is a multi-family residential development with includes, house pads, streets
and landscaped areas.
List/describe proposed impervious features of the project (e.g., buildings, roadways, parking
lots, courtyards, athletic courts, other impervious features):
Impervious features include 8 multi-family homes in a single structure with an underground
parking lot. Landscaped areas will be located adjacent to the structure, including the use of
impervious sidewalks and paver entrance to the aforementioned parkinq structure.
List/describe proposed pervious features of the project (e.g., landscape areas):
Pervious features include landscape areas, sidewalks and driveway.
Does the project include grading and changes to site topography?
181Yes
D No
Description / Additional Information:
Does the project include changes to site drainage (e.g., installation of new storm water
conveyance systems)?
181 Yes
•No
Description / Additional Information:
The project will construct a storm drain that will discharge directly to the existing storm drain
located within the adjacent Oak Avenue.
Identify whether any of the following features, activities, and/or pollutant source areas will be
present (select all that apply):
D On-site storm drain inlets
1811nterior floor drains and elevator shaft sump pumps
1811nterior parking garages •Need for future indoor & structural pest control
181 Landscape/Outdoor Pesticide Use
D Pools, spas, ponds, decorative fountains, and other water features
D Food service
D Refuse areas
D Industrial processes
D Outdoor storage of equipment or materials
D Vehicle and Equipment Cleaning
D Vehicle/Equipment Repair and Maintenance
D Fuel Dispensing Areas
D Loading Docks
D Fire Sprinkler Test Water
D Miscellaneous Drain or Wash Water
181 Plazas, sidewalks, and parking lots
Identification of Receiving Water Pollutants of Concern
Describe path of storm water from the project site to the Pacific Ocean (or bay, lagoon, lake or
reservoir, as applicable):
Runoff from the site drains to an existing storm drain located within Oak Avenue to the north of
the project site. The storm drain converges with a master storm drain to the west of Oak Avenue,
ultimately discharging to the Agua Hedionda Lagoon and 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
pollutant(s)/stressor(s) causing impairment, and identify any TMDLs for the impaired water
bodies:
303(d) Impaired Water Body Pol I uta nt( s )/Stressor( s) TMDLs
Agua Hedionda Lagoon Indicator Bacteria, Indicator Bacteria,
:iedimentation/Siltation, ISedimentation/Siltation,
Invasive Soecies Invasive Species
Identification of Project Site Pollutants
Identify pollutants anticipated from the project site based on all proposed use(s) of the site (see
BMP Design Manual Appendix B.6):
Also a Receiving
Not Applicable to Anticipated from the Water Pollutant of
Pollutant the Project Site Project Site Concern
Sediment D 181 181
Nutrients D 181 D
Heavy Metals D r8J D
Organic Compounds r8J D D
Trash & Debris D r8J D
Oxygen Demanding D 181 D
Substances
Oil & Grease D r8J D
Bacteria & Viruses D r8J r8J
Pesticides D r8J D
Hydromodification Management Requirements
Do hydromodification management requirements apply (see Section 1.6 of the BMP Design
Manual)?
D Yes, hydromodification management flow control structural BMPs required.
181 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.
Description / Additional Information (to be provided if a 'No' answer has been selected above):
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?
•Yes
181 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 8 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.
Discussion / Additional Information:
Flow Control for Post-Project Runoff"
*This Section only reaulred If hvclromodlfication management reauirements aooly
List and describe point(s) of compliance (POCs) for flow control for hydromodification
management (see Section 6.3.1 ). For each POC, provide a POC identification name or number
correlating to the project's HMP Exhibit and a receiving channel identification name or number
correlating to the project's HMP Exhibit.
Has a geomorphic assessment been performed for the receiving channel(s)? •No, the low flow threshold is 0.102 (default low flow threshold)
D Yes, the result is the low flow threshold is 0.102
D Yes, the result is the low flow threshold is 0.302
D Yes, the result is the low flow threshold is 0.502
If a geomorphic assessment has been performed, provide title, date, and preparer:
Discussion / Additional Information: (optional)
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 City
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.
C_cityof
Carlsbad
Project Name: VILLAGE WALK
Project ID: CT2018-0005
DWG No. or Building Permit No.: TBD
STANDARD PROJECT
REQUIREMENT
CHECKLIST
E-36
Project Information
Source Control BMPs
Development Services
land Development Engineering
1635 Fa raday Avenue
(760) 602-2750
www.carlsbadca.gov
All development projects must implement source control BMPs SC-1 through SC-6 where applicable and feasible. See
Chapter 4 and Appendix E.1 of the BMP Design Manual (Volume 5 of City Engineering Standards) for information to
implement source control BMPs shown in this checklist.
Answer each category below pursuant to the following.
• "Yes" means the project will implement the source control BMP as described in Chapter 4 and/or Appendix E.1 of the
Model BMP Design Manual. Discussion/justification is not required .
• "No" means the BMP is applicable to the project but it is not feasible to implement. Discussion/justification must be
provided. Please add attachments if more space is needed.
• "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). Discussion/justification may be
provided.
Source Control Requirement Applied?
SC-1 Prevention of Illicit Discharges into the MS4 • Yes • No 111 N/A
Discussion/justification if SC-1 not implemented:
SC-2 Storm Drain Stenciling or Signage • Yes • No lil N/A
Discussion/justification if SC-2 not implemented:
There are no storm drain curb inlets located within the project site.
SC-3 Protect Outdoor Materials Storage Areas from Rainfall, Run-On, Runoff, and Wind • Yes • No lil N/A Dispersal
Discussion/justification if SC-3 not implemented:
No outdoor materials storage areas proposed
E-36 Page 1 of 4 Revised 09/16
Source Control Reaulrement (continued) Applied?
SC-4 Protect Materials Stored in Outdoor Work Areas from Rainfall, Run-On, Runoff, and D Yes • No 111 N/A Wind Dispersal
Discussion/justification if SC-4 not implemented:
No outdoor work areas proposed.
SC-5 Protect Trash Storage Areas from Rainfall, Run-On, Runoff, and Wind Dispersal ll)Yes D No D N/A
Discussion/justification if SC-5 not implemented:
SC-6 Additional BMPs based on Potential Sources of Runoff Pollutants must answer for each source listed below and
identify additional BMPs. (See Table in Appendix E.1 of BMP Manual for guidance).
D On-site storm drain inlets D Yes lll No D NIA
II) Interior floor drains and elevator shaft sump pumps Ill Yes D No D N/A
• Interior parking garages Ill Yes D No D NIA
• Need for future indoor & structural pest control •Yes D No Ill NIA
Ill Landscape/Outdoor Pesticide Use Ill Yes D No D N/A
• Pools, spas, ponds, decorative fountains, and other water features D Yes • No 111 NIA
D Food service D Yes D No Ill N/A
• Refuse areas • Yes • No 111 N/A
D Industrial processes D Yes D No Ill N/A
D Outdoor storage of equipment or materials •Yes D No Ill NIA
D Vehicle and Equipment Cleaning D Yes D No Ill N/A
D Vehicle/Equipment Repair and Maintenance • Yes D No Ill N/A
D Fuel Dispensing Areas • Yes D No Ill NIA
D Loading Docks •Yes • No Ill N/A
D Fire Sprinkler Test Water D Yes D No 111 N/A
• Miscellaneous Drain or Wash Water • Yes • No Ill N/A
Iii Plazas, sidewalks, and parkinQ lots Iii Yes • No D N/A
For "Yes" answers, identify the additional BMP per Appendix E.1. Provide justification for "No" answers.
* Next page
E-36 Page 2 of 4 Revised 09/16
Site Design BMPs
All development projects must implement site design BMPs SD-1 through SD-8 where applicable and feasible. See
Chapter 4 and Appendix E.2 thru E.6 of the BMP Design Manual (Volume 5 of City Engineering Standards) for information
to implement site design BMPs shown in this checklist.
Answer each category below pursuant to the following.
• "Yes" means the project will implement the site design BMPs as described in Chapter 4 and/or Appendix E.2 thru E.6 of
the Model BMP Design Manual. Discussion / justification is not required.
• "No" means the BMPs is applicable to the project but it is not feasible to implement. Discussion/justification must be
provided. Please add attachments if more space is needed.
• "NIA" means the BMPs is not applicable at the project site because the project does not include the feature that is
addressed by the BMPs (e.g., the project site has no existing natural areas to conserve). Discussion/justification may be
provided.
Site Design Requirement I Applied?
SD-1 Maintain Natural Drainage Pathways and Hydrologic Features I Ill Yes I 0 No I • N/A
Discussion/justification if SD-1 not implemented:
SD-2 Conserve Natural Areas, Soils, and Vegetation I IIIYes I O No I • N/A
Discussion/justification if SD-2 not implemented:
SD-3 Minimize Impervious Area I D Yes I • No I III N/A
Discussion/justification if SD-3 not implemented:
SD-4 Minimize Soil Compaction I Iii Yes I • No I • NIA
Discussion/justification if SD-4 not implemented:
SD-5 Impervious Area Dispersion I Iii Yes I • No I • N/A
Discussion/justification if SD-5 not implemented:
Rooftops will drain onto adjacent landscape areas. Receiving pervious areas will have a minimum
width of 10 feet, and a maximum slope of 5%.
E-36 Page 3 of 4 Revised 09/16
,,.
.., INTERIOR FLOOR DRAINS & INTERIOR PARKING LOTS
,,.
,,,,.. ...
,..
....
,,.. ..
,. ...
,,.. ...
... ...
...
' ..
,.. ..
-.. -....
,.. -
""'
... -
I"" ..
The parking lot is covered by the structure such that no direct runoff is possible. The entrance
to the parking lot is porous pavers and has an additional drain intercept to ensure all runoff
from the entrance is captured prior to entering the parking lot.
In the event of requiring drainage within the parking lot, area drains are provided that are then
pumped to the surface BMP.
LANDSCAPE/OUTDOOR PESTICIDE USE
All homeowners and landscaping maintenance staff will be provided with educational material
in regards to the responsible application of pesticides and fertilizers.
PLAZAS, SIDEWALKS, AND PARKING LOTS
The project includes a parking lot (as discussed previously) and a servicing sidewalk access
to the proposed residences. This sidewalk will drain to adjacent landscaping prior to draining
to the storm drain system. These flows are then conveyed to the treatment BMP prior to
discharging from the project site .
Site Design Reaulrement (continued) I Applied?
SD-6 Runoff Collection I •Yes I D No I Iii NIA
Discussion/justification if SD-6 not implemented:
SD-7 Landscaping with Native or Drought Tolerant Species I III Yes I • No I • N/A
Discussion/justification if SD-7 not implemented:
SD-8 HarvestinQ and UsinQ Precipitation I •Yes I D No I III NIA
Discussion/justification if SD-8 not implemented:
E-36 Page 4 of 4 Revised 09/16
SUMMARY OF PDP STRUCTURAL BMPS
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 5. 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 be verified by the City at the completion of construction. This may
include requiring the project owner or project owner's representative 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 City 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 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
BMPs selected). For projects requiring hydromodification flow control BMPs, indicate whether
pollutant control and flow control BMPs are integrated together or separate.
Runoff from the project site is conveyed via a BMP treatment train incorporating the use of
disconnection of impervious areas by draining roof drains into adjacent vegetated swales prior
to discharging to one (1) infiltration (retention) basin located to the rear of the project site. This
infiltration BMPs will also serve as a peak flow detention basin for the project site. Once flows
are routed via the aforementioned BMP facility, flows are then discharged to the receiving
storm drain system located within Oak Avenue to the north of the project site.
A small vegetated area located at the frontage of the project site (approximately 600 sq . ft.) will
act as a self-treating area prior to discharging to the curb and gutter within the adjacent Oak
Avenue.
Per form 1-7 (harvest and Use Feasibility Checklist), harvest and re-use has been deemed
infeasible.
[Continue on next page as necessary.]
[Continued from previous page -This page is reserved for continuation of description of general
strategy for structural BMP implementation at the site.]
Structural BMP Summary Information
[Copy this page as needed to provide information for each Individual proposed
structural BMP]
Structural BMP ID No. BMP-1
DWG Sheet No.
Type of structural BMP:
D Retention by harvest and use (HU-1)
181 Retention by infiltration basin (INF-1 )
D Retention by bioretention (INF-2)
D Retention by permeable pavement (INF-3)
D Partial retention by biofiltration with partial retention (PR-1)
D Biofiltration (BF-1)
D Flow-thru treatment control included as pre-treatment/forebay for an onsite retention or
biofiltration BMP (provide BMP type/description and indicate which onsite retention or
biofiltration BMP it serves in discussion section below)
D Detention pond or vault for hydromodification management
D Other (describe in discussion section below)
Purpose:
181 Pollutant control only
D Hydromodification control only
D Combined pollutant control and hydromodification control
D Pre-treatment/forebay for another structural BMP
D Other (describe in discussion section below)
Discussion (as needed):
Who will certify construction of this BMP?
TMS Oak investments 8, LLC
29250 Paseo Sedano
San Juan Capistrano, CA 92675
951-801-0888
Who will be the final owner of this BMP?
HOA
Who will maintain this BMP into perpetuity?
HOA
.. .. ..
....
... -
... .. ...
... ... -
... -.. ... .. .. ..
,.
... ... ..
Ill --...
.. -....
Ill .. ...
Attachment
Senuence
Attachment 1 a
Attachment 1 b
Attachment 1 c
Attachment 1 d
Attachment 1 e
BACKUP FOR PDP POLLUTANT CONTROL BMPS
This is the cover sheet for Attachment 1 .
Check which Items are Included behind this cover sheet:
Contents Checklist
DMA Exhibit (Required) 0Included
See DMA Exhibit Checklist on the
back of this Attachment cover sheet.
(24"x36" Exhibit typically required)
Tabular Summary of DMAs Showing 0 Included on DMA Exhibit in
DMA ID matching DMA Exhibit, DMA Attachment 1 a
Area, and DMA Type (Required)* • Included as Attachment 1 b,
separate from DMA Exhibit
*Provide table in this Attachment OR
on DMA Exhibit in Attachment 1a
Form 1-7, Harvest and Use Feasibility 01ncluded
Screening Checklist (Required unless D Not included because the entire
the entire project will use infiltration project will use infiltration BMPs
BMPs)
Refer to Appendix B.3-1 of the BMP
Design Manual to complete Form 1-7.
Form 1-8, Categorization of Infiltration 0 Included
Feasibility Condition (Required unless • Not included because the
the project will use harvest and use entire project will use harvest and
BMPs) use BMPs
Refer to Appendices C and D of the
BMP Design Manual to complete
Form 1-8.
Pollutant Control BMP Design 0 Included
Worksheets/ Calculations (Required)
Refer to Appendices B and E of the
BMP Design Manual for structural
pollutant control BMP design
guidelines
1111
iii,, .. .. ATTACHMENT 1 .. .. .. .. .. ...
,,. ..
,.. .. ..
' .. .. ... .. -.. ..
,,.
.... .. ..
... .. .. ..
... -..
la .. -.. ..
"" ..
"" ...
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...
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Use this checklist to ensure the required information has been included on the DMA
The DMA Exhibit must identify:
0Underlying hydrologic soil group
0Approximate depth to groundwater
Exhibit:
0Existing natural hydrologic features (watercourses, seeps, springs, wetlands)
0 Critical coarse sediment yield areas to be protected (if present)
0 Existing topography and impervious areas
0 Existing and proposed site drainage network and connections to drainage offsite
0 Proposed grading
0 Proposed impervious features
0 Proposed design features and surface treatments used to minimize imperviousness
0 Drainage management area (DMA) boundaries, DMA ID numbers, and DMA areas (square
footage or acreage), and DMA type (i.e., drains to BMP, self-retaining, or self-mitigating)
0 Structural BMPs (identify location and type of BMP)
.. ..
...
... ..
,...
1111
-..
..
.. ..
... ..
.. ..
... .. .. .. -.. .. ..
Use this checklist to ensure the required information has been included on the
Hydromodification Management Exhibit:
The Hydromodification Management Exhibit must identify:
= Underlying hydrologic soil group
c Approximate depth to groundwater
::J Existing natural hydrologic features ( watercourses, seeps, springs, wetlands) = Critical coarse sediment yield areas to be protected (if present)
::J Existing topography
J Existing and proposed site drainage network and connections to drainage offsite = Proposed grading
::i Proposed impervious features = Proposed design features and surface treatments used to minimize imperviousness
::J Point(s) of Compliance (POC) for Hydromodification Management
CJ Existing and proposed drainage boundary and drainage area to each POC (when necessary,
create separate exhibits for pre-development and post-project conditions)
c Structural BMPs for hydromodification management (identify location, type of BMP, and
size/detail)
I ·! I I II :\" I
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PROPOSED s• (SDR35) STORM 46.90TC-46.40Fl..
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TRASH ENCL
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EXIST. SINGLE FAMILY RESIDENCE
PROPOSED RETAINING WALL W/Bl.OCI< WALL (MAX HEIGHT-6}
48.10 FF a• DIA. (SDR35) OVERFLOW
OU11£T DRAIN PIPE (FROM "'
RETENTION AREA) /!: 1!= ~
50.lOTG
49.lOINV
PROPOSED 4"11 PVC
RAIN PIPE IC S=0.50%
OU> <O (01') • ..,= 0 ~
SUMP TANK W/GRATE
DRAIN ANI) PUMP
49.00 FF
PROPOSED 6' HIGH BLOCK WALL
50.00TG
48.60INV
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DMA SO IL TYPE
DMA-1 B
ST-1 B
ST-2 B
ST-3 B
DM-1 B
TOTAL
LEGEND
DMA. BOUNDAR IES
BMP AREAS
IMPERVIOUS AREAS
LANDSCAPED A.REAS
SELF TREATING AR EAS
PERMEABLE PA VERS
20'
EXIST. SIDEW
(PROTECT~
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TOTAL AREA
(sq -ft) (acres)
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111 0.00
408 0.01
52 0.00
42 0.00
16798 ~ 0.37
----
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(sq-ft) (acres) (sq-ft) (acres)
11701 0.27 4484 0.10
0 0.00 111 0.00
0 0.00 408 0.01
0 0.00 52 0.00
42 0.00 0 0.00
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%IMPERVIOUS
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EXISTING OCEANMIST CONDOMINIUMS
F.F. ELEVATION 57.30
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1. Is there a demand for harvested water (check all that apply) at the project site that is reliably
present during the wet season?
(g]Toilet and urinal flushing
(g]Landscape irrigation
D o th er: _____ _
2. If there is a demand; estimate the anticipated average wet season demand over a period of 36
hours. G uidance for planning level demand calculations for toilet/urinal flushing and landscape
irrigation is p rovided in Section B.3.2.
Toilet and urinal flushing demand: ( 9·39al ) (~) (8 houses) (2·5 persons) (l.Sday) = 37.3ft3
person-day 7.4Bgal house
Irrigation demand: ( 147ogal ) (~) (l.Sday)(0.38Sacre) = 113.7 ft3
acre-1.Sday 7.4Bgal
Total: 150.1 cubic-feet
3. Calculate the DCV using worksheet B-2.1.
540 cubic-feet
3a. Is the 36-hour demand
greater than or equal to the
D CV?
O Yes / (g]No ~
{i
Harvest and use appears to be
feasible. Conduct more detailed
evaluation and sizing
calculations to confirm that
D CV can be used at an adequate
rate to meet drawdown criteria.
36. Is the 36-hour demand greater
than 0.25DCV but less than the full
D CV?
O Yes / [g] No~ n
Harvest and use may be feasible.
Conduct more detailed evaluation and
sizing calculations to determine
feasibility. Harvest and use may only
be able to be used for a po rtion 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.
Is harvest and use feasible based o n further evaluation? D Yes, refer to Appendix E to select and size harvest and use BMPs.
[g] No, select alternate BMPs.
3c. Is the 36-hour
d emand less than
0.25DCV?
(g]Yes n
Harvest and use is
considered to be
infeasible.
Note: All rainwater harvest and use must comply with the California Plumbing Code (Sections 1702.9.3,
1702.9.4, etc.).
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?
Note that it is not necessary to investigate each and every criterion in the worksheet if infiltration is precluded.
Instead a letter of justification from a geotechnical professional familiar with the local conditions
substantiating any geotechnical issues will be required.
Criteria Screening Question
Is the estimated reliable infiltration rate below proposed facility
locations greater than 0.5 inches per hour? The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.2 and Appendix D .
Provide basis:
Yes No
•
Based on WSS information, both basins are located on B type soils. TI1e infiltration rate (before safety factors) below the
basin is 9.5 inches p er hour. Per the geotechnical investigation, a conservative SF of 3 is applied, thus the design
infiltration rate of 3.2 inches per hour is used.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability.
2
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of geotechnical hazards (slope stability,
groundwater mounding, utilities, or other factors) that cannot be
mitigated to an acceptable level? The response to this Screening
Question shall be based on a comprehensive evaluation of the factors
presented in Appendix C.2.
Provide basis:
Infiltration is recommended for use on the site.
•
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability.
Criteria
3
Screening Question
Can infiltration greater than 0.5 inches per hour be allowed
without increasing risk of groundwater contamination (shallow
water table, storm water pollutants or other factors) that cannot
be mitigated to an acceptable level? The response to this Screening
Question shall be based on a comprehensive evaluation of the factors
presented in AppendL, C.3.
Provide basis:
Yes No
•
Per the Geotechnical Report Strata-Tech, Inc. Preliminary Infiltration Testing Storm Water Management, 341-347 Oak
Ave, Carlsbad, CA dated 1 /26/18 the depth of the water table is approximately 15 ft.
4
Can infiltration greater than 0.5 inches per hour be allowed
without causing potential water balance issues such as change of
seasonality of ephemeral streams or increased discharge of
contaminated groundwater to surface waters? The response to this
Screening Question shall be based on a comprehensive evaluation of
the factors presented in Appendix C.3.
Provide basis:
•
Infiltration rates determined through Web Soil Survey are greater than 0.5 inches per hour. However, it is anticipated
that any amount of infiltration at the site would not increase the risk of changing the seasonality of ephemeral streams o
increase the risk of contaminating surface waters that currently exits. Potential impacts of the proposed basins are low
due to distance in combination with construction recommendations. There is minimal potential contamination ,vith
installation of the proposed basins.
Part 1
Result
*
If all answers to rows 1 -4 are "Yes" a full ii1filtration design is potentially feasible. The [8JYes
feasibility screening category is Full Infiltration
If any answer from row 1-4 is "No", infiltration may be possible to some extent but
would not generally be feasible or desirable to achieve a "full mfiltration" design. 0No
Proceed to Part 2
*To be completed using gathered site information and best professional judgment considering the definition of MEP ii1
the MS4 Permit. Additional testing and/ or studies may be required by Agency/Jurisdictions to substantiate findings
Part 2 -Partial Infiltration vs. No Infiltration Feasibility Screening Criteria
Would infiltration of water in any appreciable amount be physically feasible without any negative
consequences that cannot be reasonably mitigated?
Criteria
5
Screening Question
Do soil and geologic conditions allow for infiltration in any
appreciable rate or volume? The response to this Screening
Question shall be based on a comprehensive evaluation of the factors
presented in Appendix C.2 and Appendix D.
Provide basis:
Yes No
•
Based on WSS information, both basins are located on B type soils. The infiltration rate (before safety factors) below the
basin is 9.5 inches per hour. Per the geotechnical investigation, a conservative SF of 3 is applied, thus the design
infiltration rate of 3.2 inches per hour is used.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source a licabili , and whv it was not feasible to miti te low infiltration rates.
6
Can Infiltration in any appreciable quantity be allowed without
increasing risk of geotechnical hazards (slope stability,
groundwater mounding, utilities, or other factors) that cannot
be mitigated to an acceptable level? The response to this Screening
Question shall be based on a comprehensive evaluation of the factors
presented in Appendix C.2.
Provide basis:
Infiltration is recommended for use on the site.
•
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/data source applicability and why it was not feasible to mitigate low infiltration rates.
Criteria
7
Screening Question
Can Infiltration in any appreciable quantity be allowed without
posing significant risk for groundwater related concerns
( shallow water table, storm water pollutants or other factors)?
The response to this Screening Question shall be based on a
comprehensive evaluation of the factors presented in Appendix C.3.
Provide basis:
Yes No
•
Per the Geotechnical Report Strata-Tech, Inc. Preliminary Infiltration Testing Storm Water Management, 341-347 Oak
Ave, Carlsbad, CA dated 1/26/18 the depth of the water table is approximately 15 ft.
Infiltration is recommended for use on the site.
8
Can infiltration be allowed without violating downstream water
rights? The response to this Screening Question shall be based on a
comprehensive evaluation of the factors presented in Appendix C.3.
•
Provide basis:
Infiltration is recommended for use on the site.
Summarize findings of studies; provide reference to studies, calculations, maps, data sources, etc. Provide narrative
discussion of study/ data source applicability and why it was not feasible to mitigate low infiltration rates.
Part 2
Result*
If all answers from row 1-4 are yes then partial infiltration design is potentially feasible. l:8]Yes
11,e feasibility screening category is Partial Infiltration.
If any answer from row 5-8 is no, then infiltration of any volume is considered to be
infeasible within the drainage area. The feasibility screening category is No Infiltration.
"'To be completed using gathered site information and best professional judgment considering the definition of MEP in
the MS4 Permit. Additional testing and/ or studies may be required by Agency /Jurisdictions to substantiate findings
... ...
,.. ..
.. .. .. .. .. ..
II" ..
..
---.......s T R AT A -T E C H , I N C .
~ G E D C D N S U L T A N T B
310.968.2999
January 26, 2018
TMS Highland Investments, LLC
Tony Sfreddo
29250 Paseo Sedano
San Juan Capistrano, California 92675
tsfrcddo@icloud.com
Subject:
stratatech@yahoo.com
W.O. 284018-I
Preliminary Infiltration testing, Storm Water
Management, 341-347 Oak Ave, Carlsbad,
California
111t Ref: STRATA-TECH, INC.; "Geotechnical Engineering Investigation, Proposed Multij'amily
...
1111 -
... ..
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Ill
Residential Development, 341-347 Oak Ave, Carlsbad, California", January 18, 2018
Gentlemen:
In accordance with your authorization and terms of our contract STRATA-TECH, Inc. is pleased
to submit the results of our storm water infiltration testing.
Falling head percolation testing was performed in two Pits at the locations shown on the attached
grading plan .
The soils encountered consist primarily of beach deposits Orange-yellow, silty, fn sand, Sand, fn
to 15-feet. Logs of the Pits are attached. The percolation pit bottoms are substantially separated
from seasonal groundwater. Ground water was encountered in adjacent borings that were dry to
15 feet. Groundwater is not expected to rise within 15 feet from the proposed development.
STRATA-TECH,INC.
'I'" GE •C •N5ULTANT5
,. ...
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1111
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1111
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TMS Highland Investments, LLC.
Preliminary Storm Water Infiltration Testing
2 January26 , 20 I 8
341-347 Oak Ave, Carlsbad
Testing was performed in 5-foot dry wells consisting of 6-inch slotted well screen with .020"
openings in an 8" diameter hand borings having the annular space packed with #3 Monterey filter
sand to prevent caving. Hand borings were prepared on 12/27/17.
The cased pits were filled with water for pre soak on 12/27/17 and the percolation test conducted
immediately following the pre soak which confirmed sand condition criteria as outlined in
OC_TGD _5-19-l lAppendixVII.
The testing consisted of filling each 5-foot pit with water to within 24-inches of the surface and
allowing it to seep for IO min intervals and repeatedly filling the test pit and measuring the
stabilized rate at the end of 6th cycle. The drop between successive measurements was recorded for
each pit and is the basis for the calculated infiltration rate .
The lowest calculated infiltration rate of 9.5 inch/Hr. may be used by the design civil engineer for
the infiltration system design for the subject site. When a conservative factor of safety, FS = 3 is
applied the infiltration rate becomes 3 .2 in/Hr.
At the completion of testing the well screens were pulled and remaining holes filled with native soil
and tamped.
AGENCY REVIEW
All soil, geologic and structural aspects of the proposed development are subject to the review and
approval of the governing agency(s). It should be recognized that the governing agency (s) can
dictate the manner in which the project proceeds. They could approve or deny any aspect of the
proposed improvements and/or could dictate which foundation and grading options are acceptable .
Supplemental geotechnical consulting in response to agency requests for additional information C could be required and will be charged on a time and materials basis.
,.
111111 STRATA-TECH,INC.
,.. GECCCN5ULTANT5
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,. ..
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1111 --..
1111
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IMS Highland Investments, LLC.
Preliminary Storm Water Infiltration Testing
3 January26 , 2018
341-347 Oak Ave, Carlsbad
This report is subject to review by the controlling authorities for this project
The work performed was carried out in accordance with acceptable geotechnical principles
common to the local area in which we practice. We make no other warranties, either expressed or
implied .
Respectfully submitted:
STRATA-TECH, INC.
Roland Acuna, PG
President
Larry Finley
RCE 46606
.,. Enclosures:
ii.
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•
Appendix; A
Plate 1 -Pit/Pere Location Map
Plate 2 -Test Pit Logs
Plate 3 -Test Results
1int Malo
Beach
VICINITY MAP
Geotechnical Engineering Investigation
341-347 Oak Ave
Carlsbad, California
STRATA -TECH, INC.
Work Order 284018
Plate No. 1
LOCAL GEOLOGY
Geotechnical Engineering Investigation
341-347 Oak Ave
Carlsbad, California
STRATA -TECH, INC.
Work Order 284018
Plate No. 1
STRATA-TECH,INC.
GEOCONSULTANTS
APENDIX A
Plot Plan, Boring Logs and Test Results
RECORD OF SUBSURFACE EXPLORATION
~-~ -Date Preliminary Geotechnical Investigation en OQ) -g t Q) C en .--. a. 5 ~ Q) -E 0-3: .c 341-34 7 Oak ave 1ii "O a. ro ·o ~ ~ Q) Cf) ~e....... 0 0 Carlsbad, California
u B Work Order 284018 Test Pit No. 1
Description of Earth Materials
0 -Orange-Brown, fn sand
2 -Orange-brown , fn-med Sand,w/trace of clay, dry
3.2 113 4 -
6 -Orange-tan, fn-med , silty sand, dry
8 -Bottom at 8' Feet. No Ground Water. No Caving.
RECORD OF SUBSURFACE EXPLORATION
~-~ -Date 1/0/1900 Preliminary Geotechnical Investigation en OQ) -g u: Q) C a. 5 ~ en .--. -Q) -E 0-3: .c 341 -347 Oak ave 1ii "O a. ro ·o ~ ~ Q) Cf) ~e....... 0 0 Carlsbad, California
u B Work Order 284018 Test Pit No. 2
Description of Earth Materials
0 -Brown, Silty Sand w/ Roots
5 -Orange-Brown, fn-med, Sand , dry
7.2 114.1
10 -9.1 11 3.9 Yellow-Tan Sand , Dense, damp
15 -
Bottom at 15 Feet. No Ground Water. No Caving. -
STRATA -TECH, INC.
BORING LOCATION MAP --
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PLATE:2
Pe rcol1tlon Test Data Sheet
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---~----
Automated Worksheet B.3-1: Proiect-Scale BMP Feasibili
Category Category # .. -Capture & Use -
Inputs 2
Infiltration
Inputs
Result
3
4
5
6
7
8
9 9
10
11
12
l4
15
16
17
18
Worksheet B.3-1 General Notes:
Description
Design Capture Volume for Entire Project Site
Proposed Development Type
Number of Residents or Employees at Proposed Development
Total Planted Area within Development
Water Use Category for Proposed Planted Areas
ls Average Site D esign Infiltration Rate :S0.500 Inches per Hour?
Is Average Site Design Infiltration Rate :S0.010 Inches per Hour?
ls lnfiltration of the Full DCV Anticipated to Produce Negative Impacts?
Is Infiltration of Any Volume Anticipated to Produce Negative Impacts?
36-Hour Toilet Use Per Resident or Employee
Subtotal: Anticipated 36 Hour Toilet Use
Anticipated I Acre Landscape Use Over 36 I-lours
Subtotal: Anticipated Landscape Use Over 36 I-lours
Total Anticipated Use Over 36 Hours
Total Anticipated Use / Design Capture Volume
Are Full Capture and Use Technigues Feasible for this Project'
ls Full Retention Feasible for this Project?
Is Partial Rerention Fcasihle for this Project?
Feasibility Category
-Units
AO
Residential unitless
24 #
4,484 sg-ft
Low unitless
No yes/no
No yes/no
No yes/no
No yes/no
1.86 cubic-feet
45 cubic-feet
52.14 cubic-feet
5 cubic-feet
50 cubic-feet
0.09 cubic-feet
No unitless
Yes yes/no
Yes yes/no
3 1, 2, 3, 4, 5
A. Applicants may use this worksheet to determine the types of structural BMPs that are acceptable for implementation at their project site (as
required in Section 5 of the BMPDM). User input should be provided for yellow shaded cells, values for all other cells will be automatically
generated. Projects demonstrating feasibility or potential feasibility via this worksheet are encouraged to incorporate capture and use features in
their project.
B. Negative impacts associated with retention may include geotechnical, groundwater, water balance, or other issues identified by a georechnical
engineer and substantiated through completion of form 1-8.
C. Feasibility Category 1: Applicant must implement capture & use, retention, and/or infiltration elements for the entire D CV.
D. Feasibility Category 2: Applicant must implement capture & use elements for the entire DCV.
E. Feasibility Category 3: Applicant must implement retention and/or infiltration elements for all DMAs with Design Infiltration Rates greater
than 0.50 in/hr.
F. Feasibility Category 4: Applicant must implement standard unlined biofiltration BM Ps sized at 2:3% of the effective impervious tributary
area for all D J\fAs with Desih>n Infiltration Rates o f 0.011 to 0.50 in/hr. Applicants may be permitted to implement lined BMPs, reduced size
BMPs, and/or specialized biofiltration BMPs provided adclitional criteria identified in "Supplemental Retention Criteria for Non-Standard
Biofiltration BMPs" are satisfied.
G. Feasibility Category 5: Applicant must implement standard lilli;d biofiltration BMPs sized at 2:3% o f the effective impervious tributary area
for all D MAs with Design Infiltration Rates of0.010 in/hr or less. Applicants may also be permitted to implement reduced size and/ or
specialized biofiltration BMPs provided adclitional criteria identified in "Supplemental Retention Criteria for Non-Standard Biofiltration BMPs"
are satisfied.
H. PDPs participating in an offsite alternative compliance program are not held to the feasibility categories presented herein.
I
g
I
Automated Worksheet B.1-1: Calculation of Desi --
Standard . . . . -
•
Dispersion
Arca, Tree Well
& Rain Barrel
Inputs
(Optional)
Treatment
Train Inputs &
Calculations
Initial Runoff
•
I
Dispersion
Arca
Adjustments
Tree & Barrel
Adjustments
Results
# -rnm C:: ~ Drainage Basin ID or Namej
Basin Drains to the Following BMP Type
2 85th Percentile 24-hr Storm D epth
3 Design Infiltration Rate Recommended by Geotechnical Engineer
4 Impervious Surfaces Not Directed to Dispersion Area (C=0.90)
5 Serni-Pervious Surfaces Not Serving as Dispersion Area (C=0.30)
6 Engineered Pervious Surfaces Not Serving as Dispersion Area (C=0.10)
7 Na rural Type A Soil Not Serving as Dispersion Area (C=0.10)
8 Narural Type B Soil Not Serving as Dispersion Area (C=0.14)
9 Narural Type C Soil Not Serving as D ispersion Area (C=0.23)
10 Natural Type D Soil Not Serving as Dispersion Area (C=0.30)
11 Does Tributary Incorporate Dispersion, Tree Wells, and/or Rain Barrels?
12 Impervious Surfaces Directed to Dispersion Area per SD-B (Ci=0.90)
13 Serni-Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.30)
14 Engineered Pervious Surfaces Serving as Dispersion Area per SD-B (Ci=0.10)
15 Na rural Type A Soil Serving as Dispersion Area per SD-B (Ci=0.10)
16 Natural Type B Soil Serving as Dispersion Area per SD-B (Ci=0.14)
17 Narural Type C Soil Serving as Dispersion Area per SD-B (Ci=0.23)
18 Natural Type D Soil Serving as Dispersion Area per SD-B (Ci=0.30)
19 Number of Tree Wells Proposed per SD-A
20 Average Mature Tree Canopy Diameter
21 Number of Rain Barrels Proposed per SD-E
22 Average Rain Barrel Size
23 Does BMP Overflow to Stormwater Features in Downstream Drainage?
24 Identify Downstream Drainage Basin Providing Treatment in Series
25 Percent of Upstream Flows Directed to Downstream Dispersion Areas
26 Upstream Impervious Surfaces Directed to D ispersion Area (Ci=0.90)
27 Upstream Impervious Surfaces Not Directed to Dispersion Area (C=0.90)
28 Total Tributary Area
29 Initial Runoff Factor for Standard Drainage Areas
30 Initial Runoff Factor for Dispersed & Dispersion Areas
31 Initial Weighted Runoff Factor
32 Initial Design Capture Volume
33 Total Impervious Area Dispersed to Pervious Surface
34 Total Pervious Dispersion Area
35 Ratio of Dispersed Impervious Area to Pervious Dispersion Area
36 Adjustment Factor for Dispersed & Dispersion Areas
37 Runoff Factor After Dispersion Techniques
38 D esign Capture Volume After Dispersion Techniques
39 Total Tree Well Volume Reduction
' I Total Rain Barrel Volume Reduction -Final Adjusted Runoff Factor -Final Effective Tributary Area
Initial Design Capture Volume Retained by Site D esign Elements
44 I Final Design Caprure Volume Tributary to BMP
Worksheet B.1-1 General Notes:
P1J P11l
Retention I I
0.58
3.500
11,701
4,484
No No No
No No No
0 0 0
0 0 0
16,185 0 0
0.69 0.00 0.00
0.00 0.00 0.00
0.69 0.00 0.00
540 0 0
0 0 0
0 0 0
n/a n/a n/a
1.00 1.00 1.00
0.69 n/a n/a
540 0 0
0 0 0
0 0 0
0.69 0.00 0.00
11,168 0 0
0 0 0
540 0 0
oture vo
II I' PRl !i1.l 1-iii rJilll .Y Units
I I I I I I I lunitless
inches
in/hr
sq-ft
sq-ft
sq-ft
sq-ft
sq-ft
sq-ft
sq-ft
No No No No No No No yes/no
sq-ft
sq-ft
sq-ft
sq-ft
sq-ft
s9-ft
sq-ft
#
ft
#
gal
No No No No No No No unitless
unitless
percent
0 0 0 0 0 0 0 cubic-feet
0 0 0 0 0 0 0 cubic-feet
0 0 0 0 0 0 0 sq-ft
0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless
0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless
0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless
0 0 0 0 0 0 0 cubic-feet
0 0 0 0 0 0 0 sq-ft
0 0 0 0 0 0 0 sq-ft
n/a n/a n/a n/a n/a n/a n/a ratio
1.00 1.00 1.00 1.00 1.00 1.00 1.00 ratio
n/a n/a n/a n/a n/a n/a n/a unitless
0 0 0 0 0 0 0 cubic-feet
0 0 0 0 0 0 0 cubic-feet
0 0 0 0 0 0 0 cubic-feet
0.00 0.00 0.00 0.00 0.00 0.00 0.00 unitless
0 0 0 0 0 0 0 sq-ft
0 0 0 0 0 0 0 cubic-feet
0 0 0 0 0 0 0 cubic-feet
A. Applicants may use this worksheet to calculate design capture volumes for up to 10 drainage areas User input must be provided for yellow shaded cells, values for all other cells will be automatically generated, errors/notifications will be highlighted in red and summarized below.
Upon completion of this worksheet, proceed to the appropriate BMP Sizing worksheet(s).
I
a
a
~
Category
BMP Inputs
Infiltration
Calculations
Result
~
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Worksheet B.4-1 General Notes:
,ued
Description
Drainage Basin ID or Name I
Design Infiltration Rate Recommended by Geotechnical Engineer
Design Capture Volume Tributary tO BMP
ls Retention BivfP Vegetated or Non-Vegetated?
Provided Surface Area
Provided Surface Ponding D epth
Provided Soil Media Thickness
Provided Gravel Storage Thickness
Volume Infiltrated Over 6 Hour Storm
Soil Media Pore Space
Gravel Pore Space
Effective Depth of Retention St0rage
Drawdown Time for Surface Ponding (Post-Storm)
Drawdown Time for Entire Basin (Including 6 Hour Storm)
Volume Retained by BMP
Fraction of DCV Retained
Percentage of Performance Re9uirement Satisfied
Fraction of DCV Retained (normalized ro 36-hr drawdown)
This BMP Overflows to the Following Drainage Basin
Deficit of Effectively Treated Stormwater
D' I}.,
'7l Ill
3.500 --
540 --
Vegetated
440
6
18
0
540 0 0
0.25 0.40 0.40
0.40 0.40 0.40
10.5 0.0 0.0
2 0 0
9 0 0
925 0 0
1.71 0.00 0.00
1.00 0.00 0.00
1.00 0.00 0.00
--
0 I n/a n/a
Pnl /' !l'l I'll !111l PD .Y Units
-------in/hr
-------cubic-feet
unitless
sq-ft
inches
inches
inches
0 0 0 0 0 0 0 cubic-feet
0.40 0.40 0.40 0.40 0.40 0.40 0.40 unitless
0.40 0.40 0.40 0.40 0.40 0.40 0.40 unitless
0.0 0.0 0.0 0.0 0.0 0.0 0.0 inches
0 0 0 0 0 0 0 hours
0 0 0 0 0 0 0 hours
0 0 0 0 0 0 0 cubic-feet
0.00 0.00 0.00 0.00 0.00 0.00 0.00 ratio
0.00 0.00 0.00 0.00 0.00 0.00 0.00 ratio
0.00 0.00 0.00 0.00 0.00 0.00 0.00 ratio
-------unitless
n/a n/a n/a n/a n/a n/a n/a cubic-feet
A. Applicants may use this worksheet tO size Infiltration, Bioretention, and/or Permeable Pavement BMPs (INF-1, INF-2, [NF-3) for up to 10 basins. User input must be provided for yellow shaded cells, values for blue cells are automatically populated based on user inputs
from previous worksheets, values for all other ceUs will be automatically generated, errors/ notifications will be highlighted in red/ orange and summarized below. BMPs fully satisfying the pollutant control performance standards wiU have a deficit treated volume of zero and be
highlighted in green.
I
I
a
I
I
I
I
Category rn
LdJIIJtl•mm 2
3
4 I
5
Initial DCV
6
kffll•J.i.4M 7
Volume
Reductions 8
9
10 I
11
12
13
Total Volume 14
15 I
16 I Performance
Standard
. Treatment
Train
19
I
Result • Summary Notes:
Description
Drainage Basin ID or Name
85th Percentile Storm Depth
Design Infiltration Rate Recommended by Geotechnical
Engineer
Total Tributary Area
85th Percentile Storm Volume (Rainfall Volume)
Initial Weighted Runoff Factor
Initial Design Capture Volume
Dispersion Area Reductions
Tree Well and Rain Barrel Reductions
Effective Area Tributary to BMP
Final Design Capture Volume Tributary to BMP
Basin Drains to the Following BMP Typ
Volume Retained by BMPI
(normalized to 36 hour drawdown)
Total Fraction of Initial DCV Retained within DMAJ
Percent of Average Annual Runoff Retention Provided!
Percent of Average Annual Runoff Retention Required!
Percent of Pollution Control Standard Satisfied!
Discharges to Secondary Treatment in Drainage Basin
Impervious Surface Area Still Requiring Treatment
Impervious Surfaces Directed to Downstream Dispersion
Area
Impervious Surfaces Not Directed to Downstrea
Dispersion Area
Deficit of Effectively Treated Stormwater
Summary of Stormwater Pollutant Control Calculations (Vl.2)
P1l ,m II' I' ti !l'1l "11l ,a X Units
BMP-1 unitless
0.58 inches
3.500 in/hr
16,185 sq-ft
782 cubic-feet
0.69 unitless
540 cubic-feet
0 cubic-feet
0 cubic-feet
11,168 square feet
540 cubic-feet
Retention unitless
540 cubic-feet
1.00 fraction
80.4% %
80.0% %
100.0% %
unitless
0 square feet
square feet
square feet
0 cubic-feet
All fields in this summary worksheet are populated based on previous user inputs. If applicable, drainage basin elements that require revisions and/ or supplemental information outside the scope of these worksheets are highljghted in orange and summairzed
in the red text below. If all drainage basins achieve full compliance without a need for supplemental information, a green message will appear below.
-Congratulations, all specified drainage basins and B.MPs are in compliance with stormwater pollutant control reqwrements. Include I lxl 7 color prints of this summary sheet and supporting worksheet calculations as part of the SWQl\fP subrruttal package.
ATTACHMENT 2
BACKUP FOR PDP HYDROMODIFICATION CONTROL MEASURES
[This is the cover sheet for Attachment 2.]
Indicate which Items are Included behind this cover sheet:
Attachment Contents Checklist
Sequence
Attachment 2a Hydromodification Management •Included
Exhibit (Required)
See Hydromodification Management
Exhibit Checklist on the back of this
Attachment cover sheet.
Attachment 2b Management of Critical Coarse C8:I Exhibit showing project drainage
Sediment Yield Areas (WMAA Exhibit boundaries marked on WMAA
is required, additional analyses are Critical Coarse Sediment Yield
optional) Area Map (Required)
See Section 6.2 of the BMP Design Optional analyses for Critical Coarse
Manual. Sediment Yield Area Determination
D 6.2.1 Verification of Geomorphic
Landscape Units Onsite
D 6.2.2 Downstream Systems
Sensitivity to Coarse Sediment
D 6.2.3 Optional Additional Analysis
of Potential Critical Coarse
Sediment Yield Areas Onsite
Attachment 2c Geomorphic Assessment of Receiving C8:I Not performed
Channels (Optional) D Included
See Section 6.3.4 of the BMP Design
Manual.
Attachment 2d Flow Control Facility Design and C8:llncluded
Structural BMP Drawdown
Calculations (Required)
See Chapter 6 and Appendix G of the
BMP Design Manual
ATTACHMENT 3
Structural BMP Maintenance Information
Use this checklist to ensure the required information has been included in the Structural
BMP Maintenance Information Attachment:
Preliminary Design/Planning/CEQA level submittal:
Attachment 3 must identify:
181 Typical maintenance indicators and actions for proposed structural BMP(s) based
on Section 7.7 of the BMP Design Manual
Final Design level submittal:
Attachment 3 must identify:
181 Specific maintenance indicators and actions for proposed structural BMP(s). This
shall be based on Section 7.7 of the BMP Design Manual and enhanced to reflect
actual proposed components of the structural BMP(s)
181 How to access the structural BMP(s) to inspect and perform maintenance
181 Features that are provided to facilitate inspection (e.g., observation ports,
cleanouts, silt posts, or other features that allow the inspector to view necessary
components of the structural BMP and compare to maintenance thresholds)
181 Manufacturer and part number for proprietary parts of structural BMP(s) when
applicable
181 Maintenance thresholds for BMPs subject to siltation or heavy trash(e.g., silt level
posts or other markings shall be included in all BMP components that will trap and
store sediment, trash, and/or debris, so that the inspector may determine how full
the BMP is, and the maintenance personnel may determine where the bottom of
the BMP is . If required, posts or other markings shall be indicated and described
on structural BMP plans.)
181 Recommended equipment to perform maintenance
181 When applicable, necessary special training or certification requirements for
inspection and maintenance personnel such as confined space entry or
hazardous waste management
Structural BMP Maintenance Thresholds and Actions (3A)
The table below identifies the specific maintenance indicators and actions for the proposed structural BMP.
Proposed BMP shall be access via proposed access road.
No features proposed to facilitate inspections as all inspections/measurements are based on visual observation.
For most maintenance actions, truck is sufficient. A 10-lSyd truck or backhoe may be necessary when removing sediment from BMP.
No proprietary parts or training necessary to perform activities for proposed BMPs.
BMP: Infiltration Basin
MAINTENANCE ACTIVITIES
MEASUREMENT ROUTINE ACTION MAINTENANCE INDICATOR FIELD MEASUREMENT FREQUENCY MAINTENANCE ACTIVITY
Vegetation Average vegetation height Visual observation and Cut vegetation to an average height of 6-Management for greater than 12-inches, random measurements Annually, prior to start of we1
Aesthetics emergence of trees or woody throughout the side slope inches and remove trimmings. Remove season any trees, or woody vegetation. (optional) vegetation, area
Soil Repair Evidence of erosion Visual observation Annually, prior to start of Reseed/revegetate barren spots prior to
wet season wet season.
Standing water for more than Annually, 96 hours after a Drain facility. Corrective action prior to
Standing Water 96 hrs Visual observation target storm (0.60 in) event wet season. Consult engineers if
immediate solution is not evident.
Trash and Debris Trash and Debris present Visual observation Annually, prior to start of Remove and dispose of trash and debris wet season
Measure depth at apparent Remove and properly dispose of Sediment Sediment depth exceeds 10% maximum and minimum Annually, prior to start of sediment. Regrade if necessary. Management of the facility design accumulation of sediment. wet season (expected every 2 years) Calculate average depth
Inlet structures, outlet
structures, side slopes or other
General features damaged, significant Annually, prior to start of Corrective action prior to wet season.
Maintenance erosion, burrows, emergence of Visual observation Consult engineers if immediate solution
Inspection trees or woody vegetation, wet season is not evident.
graffiti or vandalism, fence
damage, etc.
Reporting
I
Frequency
(#of times
oer year)
1.0
1.0
1.0
1.0
0.5
1.0
1.0
ATTACHMENT 4
City standard Single Sheet BMP (SSBMP) Exhibit
[Use the City's standard Single Sheet BMP Plan.]
i/
:o() ; I 40'
ii
ii I
I !
I i I IJI _11,.1 ~ 77.
EXIST. EDGE Of PAVEMENT l ~I ~ -,-----H--.,...---..,....-1 0
II
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. I
i I
-EXl_(:_:_~1E-OVER_CT-~-~-PD-+--¢E+i ___ ·S2-+-.,-,11.,..1 --tt--~1.
POWER LINE ' I --,---:,tj:;-tt+--leL--~-~ Ir----
j i <1,'k '
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MODIFIED ' ~<:,-'< ' =::::..::=----'-~ s .
I
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L_ I i !
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20'
11 I
111 JOIN EXIST. C&G D SIDEWALK I
(50.98)TC-(50.50)
I j I ~G EXIST. POWER p i I ~;:,!<i,i¾'v (PROlECT IN PLA E)
I I " EXIST. CURB & 1-1G-UT1ER---~I --t. ,-t, --+-[ -ti I-~+--+--~
(PROlECT IN P CE) 26• ? ; .. . 10. 1---'-----,----+-tt---+-+---il
EXIST. SIDEWA I
fl'~ ':J,eo~
EXIST. a· SEWER MAIN I
PER DWG NO. 118-9 ---...:
~
BMP ID # BMP TYPE SYMBOL
TREATMENT CONTROL
0 INFILTRATION ~ AREA
SOURCE CONTROL LID
® SIGNAGE WATER QUALITY SIGN
r 11
BMP TABLE
CASQA NO. QUANTITY DRAWING
TC-11 440 SF
1
FD 3/4" IP <o"'
LS 7959 t:,'o· ~ J ~
<rj
NO. SHEET NO.(S) INSPECTION *
FREQUENCY
QUARlERLY
. -·-----·-------···-·-----·-··----
49.20
FS
MAINTENANCE *
FREQUENCY
SEMI-ANNUALLY
EXIST. SINGLE FAMILY RESIDENCE
PROPOSED RETAINING WALL W/BLOCK WALL (MAX HEIGHT-6)
2"11 PVC DRAIN ,___PIPE
SD
0 en
I en
I
0 en
!
.,
!!
2•• PVC DRAIN
PIPE = I
PROPOSED 6' HIGH BLOCK WALL
2"t PVC~ul'I
t---PIPE '.\,:"
so
50.00TG
48.BOINV
----
sco
VJ ::E >
!ls z
l ~ -~ ~
''N-~ \._) ' UNIT 4
46.50 GFF
45.83 PAD
U \J T c:::, U\JI T ,__J
r =
0 ii
i
':, ~G
Ui\l T 7
46.50 GFF
45.83 PAD
Ui\lT 8
46.50 GFF
45.83 PAD
LANDING
46.SOFS
0 ,,, "' ..: u.. ,,,
46.50 GFF
45.83 PAD
0 ,,, "' ..: "-"' LANDING
46.S0FS
46.50 it 45.83
7
0 ~ f2 !! LA DING
46. OFS
0
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i I ~ ..
LANDING
46.SOFS
·49.571NV. "' SD
I 52.00TW
49.48INV 51.00TG N33·59 47} 51.00TG
49.351NV
I I
51.00TG
49.141NV
EXIST. REFANING WALL
(PROlECT IN PLACE) EXISTING OCEANMIST CONDOMINIUMS
BMP NOTES:
1. lHESE BMPS ARE MANDATORY TO BE INSTALLED PER MANUFACTURER'S
RECOMMENDATIONS OR lHESE PLANS.
2. NO CHANGES TO lHE PROPOSED BMPS ON lHIS SHEET WITHOUT PRIOR
APPROVAL FROM THE CITY ENGINEER.
3. NO SUBSTITLTIONS TO lHE MATERIAL OR TYPES OR PLANTING TYPES
WllHOUT PRIOR APPROVAL FROM lHE CITY ENGINEER.
4. NO OCCUPANCY WILL BE GRANlED UNTIL THE CITY INSPECTION STAFF
HAS INSPEClED lHIS PROJECT FOR APPROPRIATE BMP CONSTRUCTION
AND INSTALLATION.
5. REFER TO MAINTENANCE AGREEMENT DOCUMENT.
6. SEE PROJECT SWMP FOR ADDlllONAL INFORMATION.
F.F. ELEVATION 57.30
50.!JOFS
6" DIA. PVC
DRAIN PIPE\
4820FS
46.50 GFF
45.83 PAD
0
"' "'
" ~
.;:; "-LANDING
46.SOFS
AeMP = 440 SF
4.9717 Tl7P
urR/SER 12.
=
51.00TG
48.931NV
S=0.50% SD
CRA TEO COVER
~--+-SLOT
✓87C lli777l7/✓
3" MULCH 36''x36" DRAINAGE BOX
'~.TS.
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51.SOTG t
48.BOINV <
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---ELEVATOR "()~~" # '2.3 ts
j
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4' .
IPE
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LC) X a.. 51.00TG I LC)(/) w ~
48.771NV
1 o·
FD TAG ON
TOP OF WALL
SCALE: 1"=10
5'J.3(J..CS
PARTY RESPONSIBLE FOR MAINTENANCE:
NAME 1MS OAK INVES1MENTS 8, LLC
ADDRESS 29250 PASEO SEDANO
H = 24" SAN JUAN CAPISTRANO, CA 92675
-1-(951) 801-0888
CONTACT: TONY SFREDDO
i .H = 6"
'
V L PLAN PREPARED BY:
NAME: MID
COMPANY: REC CONSULTANTS INC. SIGNATURE
/8" AMENDED SOIL ADDRESS: 2442 SECOND AVENUE
SAN DIEGO, CA 92101
PHONE NO.: [619)-326-6021
SEAL
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