Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 99 L&L
QUIN-01-DM-036
QUIN-01-DM-037
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 100 L&L
QUIN-01-DM-038
QUIN-01-DM-039
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 101 L&L
QUIN-01-DM-040
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 102 L&L
APPENDIX D
Native American Coordination
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 103 L&L
Sacred Lands File & Native American Contacts List Request
NATIVE AMERICAN HERITAGE COMMISSION
1550 Harbor Blvd., Suite 100
West Sacramento, CA 95691-3830
(916) 373-3710
(916) 373-5471 – FAX
[email protected]
Information Below is Required for a Sacred Lands File Search
Project: Alpine Meadows, Riverside
County: Riverside
USGS Quadrangle Name: Riverside East
Township: 3 South_____ Range: 5 West ___ Section(s): 13 Company/Firm/Agency: L&L Environmental, Inc.
Contact Person: Bill Gillean
Street Address: 700 East Redlands Blvd, Suite U, PMB 351 City: Redlands, CA Zip: 92373
Phone: 909-335-9897
Fax: 909-335-9893
Email: [email protected]
Project Description:
A parcel measuring approximately 5.74 acres will be developed into 3 single-family housing units.
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 104 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 105 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 106 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 107 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 108 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 109 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 110 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 111 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 112 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 113 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 114 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 115 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 116 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 117 L&L
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 118 L&L
From: Quechan Historic Preservation Officer <[email protected]> Sent: Tuesday, September 21, 2021 9:47 AM
To: Jeff Sonnentag
Subject: RE: H. Jill McCormick - Information Request Letter for L&L Project QUIN-05-752
This email is to inform you that we have no comments on this project. We defer to the more local Tribes
and support their decisions on the projects.
Phase I Cultural Resource Assessment
Alpine Meadows Project, Riverside, Riverside County, CA June 2023 QUIN-05-P752.ARS.Rev3 (Final) 119 L&L
REDACTED CONFIDENTIAL APPENDIX E
DPR 523 Forms
This section intentionally removed.
Fire Protection Plan
TTM 38174
APN 243-600-25
Riverside, California
24 February 2023
Prepared for:
Ryan Williams
1649 Harrison Lane
Redlands, CA 92374
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TTM38174
Fire Protection Plan
Table of Contents
Section Page
1.0 GENERAL DESCRIPTION 2
1.1 General Information 4
2.0 WILDLAND FIRE HAZARD AND RISK ASSESSMENT 4
2.1 Weather Review and Assessment 4
2.2 Off-Site Fire Hazard and Risk Assessment 6
2.3 On-site Fire Hazard and Risk Assessment 6
2.4 Fire History 9
2.5 Predicting Wildland Fire Behavior 9
2.6 Fire Behavior Calculations for the Off-Site Hazardous Vegetative Fuels 9
3.0 ASSESSING STRUCTURE IGNITIONS IN THE WILDLAND/URBAN INTERFACE 12
3.1 Firebrands 12
3.2 Radiant Heat/Direct Flame Impingement 12
3.3 Fire Resistant Plant Palette 14
4.0 FIRE DEPARTMENT RESPONSE TIMES 16
5.0 VEGETATION MANAGEMENT ZONE DESCRIPTIONS
& REQUIRED TREATMENTS 18
5.1 Vegetation Management Zone 1 Homeowner Maintained 19
5.2 Vegetation Modification Zone 2 Homeowner Maintained 20
5.3 Construction Standard 23
5.3.1 Conditions to Be Met 23
5.3.2 Additional Construction Requirements 24
5.3.3 Application for Alternate Materials and Methods 24
6.0 INFRASTRUCTURE 25
6.1 Water Supply 25
6.2 Access Roads/Driveways and Gates 25
7.0 RECOMMENDATIONS 26
7.1 Homeowners Education 26
7.2 Appendix ‘E’ 26
8.0 FIRE PROTECTION PLAN EXHIBIT
APPENDICES
Undesirable Plant Species APPENDIX ‘A’ Acceptable Plant List APPENDIX ‘B’ Literature Referenced APPENDIX ‘C’
Non-combustible & Fire-Resistant Building Materials APPENDIX ‘D’ Ignition Resistant Construction Requirements APPENDIX ‘E’ Fire Protection Plan Exhibit APPENDIX ‘F Approved AM&M Request APPENDIX ‘G’
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Fire Protection Plan
Alpine Meadows
TTM38174
Riverside, California
1.0 GENERAL DESCRIPTION
The proposed Project would split the 5.74-acre parcel APN 243-600-025, into four lots each of an approximate 46476 sf in size. Lot 1 is currently built under a prior permit.
Lot 2, 3 and 4 would construct three (3) new single-family homes.
The subject property is currently vacant with no significant topographic features or vegetation and is characterized as undeveloped land.
The proposed Project is located within a high fire hazard zone in the City of Riverside Figure 1 Very High Fire Hazard Severity Zone (VHFHSZ).
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The project is bounded by developed properties to the north, east, and west. The area to the south is undeveloped and is believed to be a flood control drainage feature. Access into the drainage is off Kingdom Dr. (Figure 2). Figure 3 Design Site Map.
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Prior to any land development within this proposed project, a Fire Protection Plan (FPP) must be submitted to and approved by the City of Riverside Fire Department (RCFD). The FPP assesses the overall (on-site and off-site) wildland fire hazards and risks that may threaten life and property associated with the proposed residential development. In addition, this FPP establishes both short and long-term fuel modifications to minimize any projected fire hazard and risk and assigns annual maintenance responsibilities for each of the recommended fuel modification actions.
1.1 General Information
Developer/Applicant: Ryan Williams
1649 Harrison Lane
Redlands, CA 92374
Approving Departments: City of Riverside Planning Department Fire Authority: City of Riverside Fire Department
The purpose of this FPP is to provide Vegetation Management Zone treatment and construction feature direction for developers, architects, builders, and the individual lot owner. The document will be used in making the structures in the proposed project safe from future wildfires.
Requirements of this FPP are based upon requirements listed in the 2022 California Fire Code, Chapter 49.
Public Resources Code, Sections 4201 through 4204, and Government Code, Sections 51175 through 51189, or other areas designated by the enforcing agency to be at a significant risk from wildfires.
Local Amendments as required; Chapter 7A -California Building Code; 2022 California Residential Code sections R337; National Fire Protection Association Standards (NFPA) 13-D, 2019 Edition. the City of Riverside Weed Abatement, Declaration of Nuisance 6.15.020, and supporting guidelines.
Hazardous vegetation and fuels around all applicable buildings and structures shall be maintained by the following laws and/or regulations:
Public Resources Code, Section 4291. California Code of Regulations, Title 14, Division 1.5, Chapter 7, Subchapter 3, Section 1299 (see guidance for implementation "General Guideline to Create Defensible Space"). California Government Code, Section 51182. California Code of Regulations, Title 19, Division 1, Chapter 7, Subchapter 1, Section 3.07. Riverside County Ordinances; 787.7 and 460.151.
2.0 WILDLAND FIRE HAZARD AND RISK ASSESSMENT
The proposed site is located within an area classified by the RCFD as a Very High Fire Hazard Area. Wildland fire may impact the project as there are wildland fuels within 100 feet of the project on the south side. The greatest threat comes from the adjacent undeveloped property and drainage south of the proposed development. There is potential for wildfire to enter the project site from a windblown east and south fire event. All the structures within the site would be subject to embers showers.
2.1 Weather Review and Assessment
The typical prevailing summer time wind pattern is out of the west/southwest and normally is of a much lower velocity (5 -10 MPH with occasional gusts to 30 MPH) and is associated with relative humidity readings ranging between 20% and occasionally more than 70% due to the sites prox imity to the ocean. All other (northwest, southeast and south) wind directions Prepared By: Monty Kalin
Firewise2000, LLC
Associate Planner
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may be occasionally strong and gusty; however, they are generally associated with cooler moist air and have higher relative humidity (>40%). They are considered a serious wild land fire weather condition when wind speeds reach >20-MPH.
The most critical weather pattern to the project area is a hot, dry offshore wind, typically called a Santa Ana. Such wind conditions are usually associated with strong (>50 MPH), hot, dry winds with very low (<15%) relative humidity. Santa Ana winds originate over the dry desert land and can occur anytime of the year; however, they generally occur in the late fall (September through November). This is also when non -irrigated vegetation is at its lowest moisture content.
The following illustrations depict the the worst case weather that FIREWISE 2000 LLC could verify over the last 10 years . Note that when very low humidity occurs simultaneously with strong winds that fire behavior can be profoundly affected.
Figure 4 Wind Gust highest found over the past several years. Recorded at 65 mph.
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Figure 5 note predominate wind out of the west.
2.2 Off-Site Fire Hazard and Risk Assessment
Figure 6 shows areas that potentially put the structures at risk. There is considerable open space fuel to the south, and potentially along the east boundary in remaining open space.
The Fire Behavior Analysis was performed to the south and east of the project site.
Historically, wildland fires have burned in the City of Riverside during moderate west to southwest winds. This moderately strong, dry wind condition that occurs during these fires usually develops in the late afternoon or early evening. These winds occur during the normal summer and early fall (June through October) months. These winds may blow from 20-30 MPH.
The most significant wind pattern that will impact the project is a Santa Ana wind which typically occurs in September through November and in the range of 50-60 MPH within this portion of Riverside County.
The current vegetative cover best resembles a SCAL 18 additionally portions were noted as more SH2 both BEHAVE Model are provided. Moderate Load, Dry Climate Shrub
The required irrigated fire-resistant/draught tolerant landscape surrounding the structure combined with ignition resistant construction requirements, will be more than sufficient to mitigate any threats from wildfire and embers coming from the east.
The greatest threat will be embers from a wildfire occurring to the east in the undeveloped open space.
2.3 On-site Fire Hazard and Risk Assessment
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All the interior fuels will be removed during grading; therefore, there are no wildland fire hazards anticipated within the development on ce all the fuel modifications are developed as described in Section 5.0 Fuel Modification Zone Descriptions & Required Treatments.
SITE PHOTOS
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2.4 Fire History
Historical wildland fire activity was also considered in developing this FPP. CalFire and other sources were studied, no large fires have been on or near the site within the last 25 years. This does not include any fire less than 2.5 ac that may have been extinguished by Riverside City Fire. The viewed fuel is typical of the area, it is doubt fuel it will change much in future years.
2.5 Predicting Wildland Fire Behavior
The BEHAVE 5.0.5 Fire Behavior Prediction and Fuel Modeling System developed by USDA –Forest Service research scientists Patricia L. Andrews and Collin D. Bevins at the Intermountain Forest Fire Laboratory, Missoula, Montana, is one of the best systematic methods for predicting wildland fire behavior.
The BEHAVE fire behavior computer modeling system is utilized by wildland fire experts and managers nationwide. The program projects the expected spotting distance, rate-of-spread and flame lengths with a reasonable degree of certainty for use in Fire Protection Planning purposes. FIREWISE 2000, Inc. used the BEHAVE 5.0.5 Fire Behavior Prediction Model to make the fire behavior assessments discussed below.
2.6 Wildland Fire Behavior Calculations for the Off-Site Hazardous Vegetative Fuels Wildland fire behavior calculations have been projected for the hazardous vegetative fuels on the undeveloped areas in proximity to the proposed residences. These projections are based on scenarios that are ‘worst case’ Riverside County fire weather in the vicinity of the project area.
Tables 2. 6.1 provides Behave Plus Inputs; fuel moisture values are at critical, and the fuel bed is unsheltered. All scenario outputs provide the expected Flame Length (expressed in feet), Rate of Fire Spread (expressed in ft/min), and Fireline Intensity (as btu/ft/s), within the Behave run sheets as part of the Scenario
Fuel Models were selected from project site observations of those areas within 200ft of proposed boundary, scenarios depict slope, aspect, and wind direction.
The two models selected most closely represent the model location, available fuel to burn. Flame Lengths would vary depending on the area being burnt through.
Table 2.6.1
Fire Behavior Modeling Inputs
Variable
Summer Weather (Onshore Flow)
Peak Weather (offshore/Santa Ana
Condition)
1h Moisture 3% 2%
1Oh Moisture 5% 3%
1OOh Moisture 7% 5%
Live Herbaceous Moisture 50% 30%
Live Woody Moisture 60% 60%
20-foot Wind Speed
(upslope/downslope)
15, 30, mph 65mph gusts
Wind Adjustment Factor 0.5 0.5
Slope Steepness varies varies
The following table depicts a fire burning with no-wind up slope within in the sourounding topographic area.
Base line results (NON-TREATED) east facing slopes near project boundary east and south side.
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Scenario 1 Typical off shore wind event modeled as Sh2 Moderate load, dry climate shrub and SCAL 18 Sage / Buckwheat. The fuel bed lacks continuity flame lengths are probably over predicted. The future view will most likely look the same unless environmental factors change.
Additional data rate of spread, and fireline intensity can be found in the behave run next page.
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Behave Results
BehavePlus 5.0.5 (Build 307)
East of Project Site
Input Worksheet
Inputs: SURFACE
Input Variables Units Input Value(s)
Fuel/Vegetation, Surface/Understory
Fuel Model sh2, SCAL18
Fuel Moisture
1-h Moisture % 2
10-h Moisture % 3
100-h Moisture % 5
Live Herbaceous Moisture % 30
Live Woody Moisture % 60
Weather
20-ft Wind Speed mi/h 65
Wind Adjustment Factor
.5
Wind Direction (from north) deg 45
Terrain
Slope Steepness % 31
Aspect deg 90
Notes
Run Option Notes
Maximum reliable effective wind speed limit IS imposed [SURFACE].
Calculations are only for the direction of maximum spread [SURFACE].
Fireline intensity, flame length, and spread distance are always for the direction of the spread calculations [SURFACE].
Wind and spread directions are degrees clockwise from north [SURFACE].
Wind direction is the direction from which the wind is blowing [SURFACE].
Results
Fuel
Model
ROS
(max)
Fireline
Intensity
Flame
Length
Direction
Max ROS
ft/min Btu/ft/s ft deg
sh2 161.5 4091 20.6 226
SCAL18 362.7 26218 48.5 226
End
Spread Diagram follows.
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Scenario 2 On shore wind event modeled as Sh2 Moderate load, dry climate shrub and SCAL 18 Sage / Buckwheat. The fuel bed lacks continuity flame lengths are probably over predicted. The future view will most likely look the same unless environmental factors change.
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Behave Results
BehavePlus 5.0.5 (Build 307)
South of Project Site
Input Worksheet
Inputs: SURFACE
Input Variables Units Input Value(s)
Fuel/Vegetation, Surface/Understory
Fuel Model sh2, SCAL18
Fuel Moisture
1-h Moisture % 3
10-h Moisture % 5
100-h Moisture % 7
Live Herbaceous Moisture % 50
Live Woody Moisture % 60
Weather
20-ft Wind Speed mi/h 15,30
Wind Adjustment Factor
0.5 Wind Direction (from north) deg 225
Terrain
Slope Steepness % 6
Aspect deg 180
Notes
Run Option Notes
Maximum reliable effective wind speed limit IS imposed [SURFACE].
Calculations are only for the direction of maximum spread [SURFACE].
Fireline intensity, flame length, and spread distance are always for the direction of the spread calculations [SURFACE].
Wind and spread directions are degrees clockwise from north [SURFACE].
Wind direction is the direction from which the wind is blowing [SURFACE].
Results for: Surface Rate of Spread (maximum) (ft/min)
Fuel 20-ft Wind Speed
Model mi/h
15 30
sh2 20.7 52.6
SCAL18 79.8 149.0
Results for: Fireline Intensity (Btu/ft/s)
Fuel 20-ft Wind Speed
Model mi/h
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15 30
sh2 500 1269
SCAL18 5360 10008
Results for: Flame Length (ft)
Fuel 20-ft Wind Speed
Model mi/h
15 30
sh2 7.8 12.0
SCAL18 23.4 31.1
Results for: Direction of Maximum Spread (from north) (deg) Fuel 20-ft Wind Speed
Model mi/h
15 30
sh2 45 45
SCAL18 45 45
End
Spread Diagram
3.0 Assessing Structure Ignitions in the Wildland/Urban Interface
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Structure ignitions from wildland wildfires basically come from three sources of heat: convective firebrands (flying embers), direct flame impingement, and radiant heat. The Behave Plus Fire Behavior Modeling Program does not address wind blown embers or f irebrands from a structure ignition perspective. However, even though ignition resistant exterior building materials will be required in the construction, they are not garnateed to prevent ignition from wind driven embers, these issues are addressed in this FPP.
3.1 Firebrands
Firebrands are pieces of burning materials that detach from a burning fuel due to the strong convection drafts in the flaming zone. Firebrands may also be referred to as embers. Firebrands can be carried a long distance (one mile or more) by fire drafts and strong winds. Severe wildland/urban interface fires can produce heavy showers of firebrands. The chance of these firebrands igniting a structure will depend on the number and size of the firebrands, how long they burn after contact and the type of building materials, building design, and construction features incorporated into the structure. Firebrands landing on combustible roofing and decks are common sources for structure ignition. They can also e nter a structure through unscreened or poorly screened vents, chimneys, unprotected skylights, and windows.
Even with non-combustible roofing, firebrands landing on leaves, needles, and other combustibles located on a roof (due to a lack of maintenance) can cause structure ignition. Any open windows, doors , or other types of unscreened openings are sources for e mbers to enter a structure during a wildland fire. If these maintenance issues are addressed on a regular basis, firebrands should not be a concern.
3.2 Radiant Heat/Direct Flame Impingement
Radiation and convection involve the transfer of heat directly from the flame to any exposed surface. Unlike radiation heat transfer, convection requires that the flames or heat column contact the structure. An ignition from radiation (given an exposed flammable surface) heat transfer depends on two aspects of the flame: 1) the radiant heat flux to a combustible surface and, 2) the duration (length of time) of the radiant flux. The radiant heat flux depends on the flame zone size, flame-structure distance, and how much the combustible material of the structure is exposed to the flame. While the flame from a wildfire may approach 1,800 degrees Fahrenheit, it is the duration of heat that is more critical. For example, a blow torch flame typically approaches 2,100 degrees Fahrenheit, yet a person can easily pass their hand through the flame. Heat duration only becomes critical to a home with a wood exterior surface if the heat is allowed to remain for 30-90 seconds.
Research scientist Jack Cohen of the United States Forest Service h as found that a homes or structures characteristics (its exterior materials and design in relation to the immediate area around a home within 100 feet) principally determine the home’s ignition potential. He calls the home and its immediate surroundings the ‘home ignition zone’. In a study of ignition of wood wallboard, tests by a USDA Forest Service research team described in the Proceedings, 1st International Fire and Materials Conference showed that flame impingement for sufficient length of time (appr oximately 1 min.) ignites a typical hardboard siding material.
Fire agencies consider fuel treatment as a principal approach to wildland fire hazard reduction. Whenever the flame length is equal to or more than the separation of combustible vegetation fr om a combustible structure for 1-2 minutes in duration or more, there is a high probability of structure ignition. Contact with a fire's convection heat column also may cause ignition but the temperature of the column’s gases is generally not hot enough or long enough in duration to sustain the ignition of the structure.
Comparing the expected wildland fire behavior projections for all boundary areas against the required fuel modification zones, and mitigation measures outlined in Section 6.0, demonstrates substantial reductions in the expected flame length in treated fuels. By requiring the structures exposed to the threat of wildfire to
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incorporate the following guidelines, those structures will be provided with the most effective treatment for minimizing losses from flame impingement and associated radiant heat intensities.
• The structure is constructed of ignition resistant building materials and processes, see APPENDIX E.
• The area surrounding structure contains an Irrigated Zone (defensible space) and a Thinning Zone (low fuel volume buffer strip) between the Irrigated Zone and the untreated fuels.
The property owner shall be required (see Section 5.0) to maintain the properties to Zone 1 / Zone 2 Fuel Modification standards and shall keep the roof and any rain gutters free of leaves, needles and other combustible debris.
All combustible materials must be properly stored away from each structure so that burning embers falling on or near the structure have no suitable host. By requiring the structure s to be constructed of non - combustible roofing , ignition resistant building materials, and the implementation of required fuel modification will be the most effective treatment for minimizing structure losses due to the projected flame lengths and associated radiant heat intensities.
3.3 Fire Resistant Plant Palette
Wildland fire research has shown that some types of plants, including many natives, are more fire resistant than others. These low fuel volume, non -oily, non -resinous plants are commonly refered to as “fire resistant”. This term comes with the proviso that each year these plants are pruned, all dead wood is removed and all grasses o r other plant material are removed from beneath the circumference of their canopies. Some native species are not considered “undesirable” from a wildfire risk management perspective provided they are properly maintained year round. Refer to APPENDIX ‘A ’ for a list of prohibited plant species and APPENDIX ‘B’ for Defensible Space Landscaping.
4.0 Fire Department Response Times
The project is within the Riverside City Fire Department’s (RCFD) response area . The closest Fire apparatus is RCFD Riverside City Fire Station 4, from 1496 W Linden St (2.8 miles away). Would likely be the first engine to arrive on scene at to the structure.
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Additional agencies such as Riverside County and nearby cities would also likely respond with equipment should all of Riverside City Resources be unavailable.
Although the RCFD Fire Station 9 Engine may be generally 9 minutes away, there is no assurance that any of the engine c ompanies will be in their stations when a wildfire threatens. Engines may respond from other stations located further away or from other incidents. On high/extreme fire danger days there often may be multiple fire starts and engine companies may be already deployed on other incidents.
• This is why planned projects use “defensible space”, ‘Ignition Resistant’ building features, and key fuel treatment strategies that enable residents to substantially increase their ability to survive a wildfire on their own and without the loss of any structure. The goal of this FPP, therefore, is to make the future residences and their owners as safe as possible and able to survive on their own until firefighting equipment arrives and/or the occupants can be safely evacuated.
5.0 VEGETATION MANAGEMENT ZONE DESCRIPTIONS & REQUIRED
TREATMENTS
• Note: Landscaping elements will be coordinated with the Case Planner through “Landscape and Irrigation Design Review”.
Zones 1 and 2 encompass 100 feet which will ensure no radiant heat will reach the structure. With the exception of Lot 4 where the distance is reduced to The property to the west’s required fuel treatment areas will tie into proposed Zones in that area. This will offer some buffer from on shore wind related fire events.
Below are the descriptions and required treatments for the Fuel Modification Zones. All distances in this report are measured horizontally from the exterior of each structure. These distances are depicted on the enclosed Fire Protection Plan Map . Fuel tr eatment areas are a mix of irrigate areas and dry thinning areas.
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The owner(s) will be responsible for maintaining their respective properties Fuel Modification Zone.
In the event of repossession, the person/unit/agency holding title to the project will be responsible for the maintenance.
All highly flammable plant species identified in Appendix A shall be permanently removed from the Irrigated Zone 1 and Thinning Zone 2 due to their susceptibility to wildland fire.
5.1 Irrigated Zone 1 - Vegetation Management Zone 0/1 Irrigated - HOMEOWNER MAINTAINED TOTAL OF 30 feet.
Zone 0 Homeowner maintained Irrigated - An area starting at the structure envelope extending 5 feet outward. This zone includes the area under and around all attached decks, and requires the most stringent wildfire fuel reduction. This area shall be kept clear of combustibles, landscaping mulch, and any large shrubs and trees. It may have limited plants that are low growing, nonwoody, properly watered and maintained. Combustible fencing material shall not be atta ched to the structure to include vinyl products.
Defined
Irrigated Zone 1 starting at 5ft from structue and extendidng an additgonal 25feet is commonly called the defensible space zone and shall be free of all combustible construction and materials. It includes the entire area around the structure (front, back and side) and that are located within the parcel. It is measured from the exterior wall of each structure or from the most distal point of a combustible projection, an attached accessory structure, or an accessory structure within 10 feet of a structure. It provides the best protection against the high radiant heat produced by wildfire. It also provides a generally open area in wh ich fire suppression forces can operate during wildfire events. This zone includes a level or level -graded area around each structure, primarily used for parking.
Required Landscaping
• Plants in this zone shall be fire resistant and shall not include any pyrophytes that are high in oils and resins such as pines, eucalyptus, cedar, cypress or juniper species . Thick, succulent or leathery leaf species with high moisture content are the most ‘fire resistant’.
Refer to APPENDIX ‘B’ for an example of accetable plants.. • Zone 1 shall be cleared of all fire prone and prohibited plant species (see APPENDIX ‘A’). • Landscape designs using hardscape features such as driveways, swimming pools, concrete, rock, pavers, and similar non-combustible features to break up fuel continuity within Zone 1 are encouraged.
• All Landscaping will be fire resistive. Landscaping elements will be coordinated with the Case Planner through Landscape and Irrigation Design Review.
Required Maintenance
• Maintenance shall be year round by the owner as required by this FPP or the RCFD. • Remove and replace any dead or dying plant material monthly.
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• Native annual and perennial grasses will be allowed to grow and produce seed during the winter and spring. As grasses begin to cure (dry out), they shall be cut to four inches or less in height.
• Trees shall be maintained to a minimum of six feet of vertical separation from low growing, irrigated vegetation beneath the canopy of each tree.
All trees must be maintained to the current ANSI A300 standards [ Tree, Shrub, and Other Woody Plant Maintenance —Standard Best Practices ANSI A300 standards are the generally accepted industry standards for tree care practices. They are voluntary industry consensus standards developed by TCIA (Pruning)]
5.2 Vegetation Management Non Irrigated – MAINTAINED by OWNER Defined
THINNING ZONE is an area of following Zone 1 and extends outward to 100 feet.
The area following Zone 1 may include single or small clusters of trimmed fire resistance native plants up to 36 inches in height where 50% of the vegetation is removed to create a mosiac. Selected native plant clusters must be separated by at least 1 1/2 times the mature height of the retained plants. The ground cover and grasses shall be weed whipped and maintained to 4" or less in stubble height.
This should take full advantage of rock outroppings and bare soil.
Required Maintenance
• Fuel Modification area shall be maintained year, as required by this FPP. Inspections and compliance shall be by Riverside City.
• Shrubs shall be kept trimmed to ensure spacing is maintianed. • Grasses shall be maintained weed whipped to 4 inches. • The area shall be maintained free of invasive plants and any volunteer native shrubs. • All plantings should be installed with at maturity growth in mind.
The image below provides a best practice spacing guide for construction and long-term maintenance.
Figure 9 Plant Spacing.
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The following graph represents Zone 2 Non Irrigated Flame Lengths.
5.3 Construction Standards
All lots within the project shall be considered to be within a Very High Fire Hazard Severity Zone (VHFHSZ) and shall be designed and built-in accordance with Chapter 7A (Materials and Construction Methods for Exterior Wildfire Exposure) of the 2022 California Building Code. To include local code amendments. For a description of the current construction requirements as of the date of this report see APPENDIX ‘D’.
• All construction and ignition resistant requirements shall meet the 2022 version of the California Fire Code, including amendments, and related Ordinances. The fire protection features described herein shall be maintained to their equivalent or greater ignition resistance in perpetuity.
Construction or building permits shall not be issued until the fire code official inspects and approves required fire apparatus access and water supply for the construction site.
5.3.1 Conditions to Be Met
Prior to the delivery of combustible building construction materials to the project site the following conditions shall be completed to the satisifaction of the RCFD:
• Water and power utilities shall be installed and approved by the appropriate inspecting department or agency.
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• Zone 1 shall be cleared of all vegetation prior to construction and subsequently planted to the requirments stated in Section 6.1 after construction is completed.
5.3.2 Additional Construction Requirements
Adequate irrigated space exists to provide a level of safety in regard to radiant heat.
An automatic fire sprinkler system is required by City Ordinance 16.32.080. Under separate cover, submit plans for the automatic fire sprinkler system(s) and obtain approval from the Fire Department prior to installation.
5.3.3 Application for Alternate Materials and Methods. (AMMR) and Proposed mitigation measures and mandatory requirement.
These measures are formally captured in the AM&M Application Appendix G.
1) 6-ft tall masonry wall as designated on the attached exhibit along the eastern PL to protect the structures from, convected/radiant heat and blowing ground embers. 2) A 2-hour exterior rated wall assembly for those surfaces facing the reduced Fuel Modification Area, to include window assemblies designed with 2 sheets of tempered glass.
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6.0 Infrastructure
Below is a review and discussion of water supply and access roads/driveways and gates that are to be utilized in the development.
6.1 Water Supply
The water supply will be provided by Riverside Public Utilities . An approved permanent water supply capable of supplying the required fire flow will be designed and installed prior to beginning construction.
Water supplies for fire protection and hydrants shall be in accordance with the 2022 California Fire Code as amended by the City of Riverside.
Hydrant installation shall conform to City of Riverside INFORMATION BULLETIN: D-19- 005 and the 2019 NFPA 14, Fire hydrants shall be tested, accepted and placed in service prior to the delivery of any combustible materials to the project site.
6.2 Access Roads/Driveways and Gates
Driveways and access roads within the development shall be termed ‘Fire Access Roads’ within this document. All fire access roads shall meet the requirements of the Riverside City Fire Depaertment, and shall be all weather surface capable of supporting loads of 80,000 lbs gross vehicle weight.
Access to all exterior portions of each structure must be within 150 feet of the available fire department access. The required turning radius of a fire apparatus access road shall be in accordance with Information Bulletin B-19-001, 28 feet inside radius and 48 feet outside radius. in accordance with Information Bulletin B-19-001 unless otherwise approved by the fire code official. Fire lanes shall be marked in accordance with the guidelines in Information Bulletin B-19-003.
Any gates to be installed shall meet RCFD Standards and shall be approved by the RCFD prior to fabrication and installation. A Knox override key switch or similar device must be installed outside the gate in an approved, readily visible, and unobstructed location at or near the gate to provide em ergency access. Gates accessing major roadways shall also be equipped with approved emergency traffic control-activating strobe light sensor(s), or other devices approved by the Fire Chief, which will activate the gate on the approach of emergency apparatus with a battery back-up or manual mechanical disconnect in case of power failure. All gates shall always be equipped to allow for automatic egress.
7.0 Owner, Occupant Education
The owner should prepare, this link will provide usefule informaion to plan ahead for an emergency;
https://riversideca.gov/readyriverside/sites/riversideca.gov.readyriverside/files/pdf/Disaster- Ready-Guide-Digital-SelfPrint-Eng.pdf
In the event of a wildland fire, you should always relocate to a safe area well beyond the path of the threatening wildland fire. If relocation is not possible and egress is cut -off by the fire, they should seek shelter within thier structure until the wildland fire passes through their area. The ignition resistant buildings will have a ‘defensible space’ area around each s tructure for
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firefighters to make their stand in the protection of each structure. In the event firefighting forces are not readily available, the defensible space will substantially increase the probability of ‘structure survivability’.
Should relocation be the the chosen option and time is available, they should ensure that all doors and windows are closed to prevent embers from entering their structure. Doors should be unlocked to allow emergency personnel unimpeded access. Both inside and outside lights should be placed on to allow emergency personnel to know that a structure is present when smoke or darkness may otherwise obscure visibility. In addition, combustible materials shall not be stored within 10 feet of any structure.
The owner shall be aware of the herein described fire protection measures by reviewing this FPP of the types of non -combustible construction and plant materials that are allowed within the the designated fuel treatment zones. A copy of this plan shall be provided to a future owner during escrow procedures. Of particular importance are APPENDICES ‘A’, ‘B’, ‘D’ anf ‘E’of this plan which provide guidance in the types of plants that allowed to be established in landscaped areas and appropriate construction materials within fuel modification zones. Plant selection is critical as embers often travel over a mile during Santa Ana wind events.
Where this FPP requires specific construction features, these features shall not be changed without the approval of the RFD.
8.0 Fire Protection Plan Map
Attached in a separate file is the Fire Protection Plan Map depicting the location of all proposed fuel treatment locations as well as fire access roads, and development bundaries.
APPENDICES
Undesirable Plant Species APPENDIX ‘A’ Acceptable Plant List APPENDIX ‘B’ Literature Referenced APPENDIX ‘C’
Non-combustible & Fire-Resistant Building Materials APPENDIX ‘D’ Ignition Resistant Construction Requirements APPENDIX ‘E’ Fire Protection Plan Exhibit APPENDIX ‘F’ Approved AM&M Request APPENDIX ‘G’
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PAGE LEFT INTENTIONALLY BLANK
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APPENDIX ‘A’
Prohibited Plant List
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APPENDIX ‘A’
Prohibited (& Fire Prone) Plant Species List
For Fuel Modification Zones in High & Very High Hazard Areas
Botanical Name Common Name Plant Form
1. Acacia species • Acacia Shrub/Tree
2. Adenostema fasciculatum Chamise Shrub
3. Adenostema sparsifolium Red Shank Shrub/Tree
4. Artemisia californica California Sagebrush Shrub
5. Anthemis cotula Mayweed Weed
6. Arundo donax Giant reed Grass/weed
7. Brassica nigra Black Mustard Weed
8. Brassica ropa Yellow Mustard Weed
9. Cedrus species Cedar Tree
10. Cirsim vulgare Wild Artichoke Weed
11. Conyza canadensis Horseweed Weed
12. Cortaderia selloana Pampas Grass Tall Grass
13. Cupressus species Cypress Tree
14. Eriogonum fasciculatum Common Buckwheat Shrub
15. Eucalyptus species Eucalyptus Shrub/Tree
16. Heterotheca grandiflora Telegraph plant Weed/shrub
17. Juniperus species Junipers Succulent
18. Lactuca serriola Prickly lettuce Weed
19. Nicotiana bigelevil Indian tobacco Shrub
20. Nicotiana glauca Tree tobacco Shrub
21. Pennisetum species Fountain Grass Ground cover
22. Pinus species Pines Tree
23. Rosmarinus species Rosemary Shrub
24. Salvia species • • Sage Shrub
25. Silybum marianum Milk thistle Weed
26. Urtica urens Burning nettle Weed
• Except:
Acacia redolens desert carpet (Desert Carpet ground cover) • • Except:
Salvia columbariae (chia)
Salvia sonomensis (Creeping Sage)
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Additionally, all of the following plants shall be removed from fuel treatment zones in order to not only reduce fuel loading but also eliminate invasive plants that are identified in the Multiple Species Habitat Conservation Plan for Riverside County
(MSHCP).
TABLE 6-2
PLANTS THAT SHOULD BE AVOIDED
ADJACENT TO THE MSHCP CONSERVATION AREA
BOTANICAL NAME COMMON NAME
Acacia spp. (all species) acacia
Achillea millefolium var. millefolium common yarrow
Ailanthus altissima tree of heaven
Aptenia cordifolia red apple
Arctotheca calendula cape weed
Arctotis spp. (all species & hybrids) African daisy
Arundo donax giant reed or arundo grass
Asphodelus fistulosus asphodel
Atriplex glauca white saltbush
Atriplex semibaccata Australian saltbush
Carex spp. (all species*) sedge
Carpobrotus chilensis ice plant
Carpobrotus edulis sea fig
Centranthus ruber red valerian
Chrysanthemum coronarium annual chrysanthemum
Cistus ladanifer (incl. hybrids/varieties) gum
rockrose
Cortaderia jubata [syn.C.
Atacamensis] jubata grass, pampas grass
Cortaderia dioica [syn. C.
sellowana] pampas grass
Cotoneaster spp. (all species) cotoneaster
Cynodon dactylon (incl. hybrids varieties) Bermuda
grass
Cyperus spp. (all species*) nutsedge, umbrella plant
Cytisus spp. (all species) broom
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Delosperma ‘Alba' white trailing ice plant
Dimorphotheca spp. (all species) African daisy, Cape marigold Drosanthemum floribundum rosea ice plant
Drosanthemum hispidum purple ice plant
Eichhornia crassipes water hyacinth
Elaegnus angustifolia Russian olive
Eucalyptus spp. (all species) eucalyptus or gum tree
Eupatorium coelestinum [syn.
Ageratina sp.] mist flower
Festuca arundinacea tall fescue
Festuca rubra creeping red fescue
Foeniculum vulgare sweet fennel
Fraxinus uhdei (and cultivars) evergreen ash,
shamel ash
Gaura (spp.) (all species) gaura
Gazania spp. (all species & hybrids) gazania
Genista spp. (all species) broom
Hedera canariensis Algerian ivy
Hedera helix English ivy
Hypericum spp. (all species) St. John's Wort
Ipomoea acuminata Mexican morning glory
Lampranthus spectabilis trailing ice plant
Lantana camara common garden lantana
Lantana montevidensis [syn. L.
sellowiana] lantana
Limonium perezii sea lavender
Linaria bipartita toadflax
Lolium multiflorum Italian ryegrass
Lolium perenne perennial ryegrass
Lonicera japonica (incl. ‘Halliana') Japanese
honeysuckle
Lotus corniculatus birdsfoot trefoil
Lupinus arboreus yellow bush lupine
Lupinus texanus Texas blue bonnets
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Malephora crocea ice plant
Malephora luteola ice plant
Mesembryanthemum nodiflorum little ice plant
Myoporum laetum myoporum
Myoporum pacificum shiny myoproum
Myoporum parvifolium (incl. ‘Prostratum') ground cover
myoporum
Oenothera berlandieri Mexican evening primrose
Olea europea European olive tree
Opuntia ficus-indica Indian fig
Osteospermum spp. (all species) trailing African daisy, African daisy,
Oxalis pes-caprae Bermuda buttercup
Parkinsonia aculeata Mexican palo verde
Pennisetum clandestinum Kikuyu grass
Pennisetum setaceum fountain grass
Phoenix canariensis Canary Island date palm
Phoenix dactylifera date palm
Plumbago auriculata cape plumbago
Polygonum spp. (all species) knotweed
Populus nigra ‘italica ' Lombardy poplar
Prosopis spp. (all species*) mesquite
Ricinus communis castorbean
Robinia pseudoacacia black locust
Rubus procerus Himalayan blackberry
Sapium sebiferum Chinese tallow tree
Saponaria officinalis bouncing bet, soapwart
Schinus molle Peruvian pepper tree, California
pepper
Schinus terebinthifolius Brazilian pepper tree
Spartium junceum Spanish broom
Tamarix spp. (all species) tamarisk, salt cedar
Trifolium tragiferum strawberry clover
Tropaelolum majus garden nasturtium
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Ulex europaeus prickly broom
Vinca major periwinkle
Yucca gloriosa Spanish dagger
An asterisk (*) indicates some native species of the genera exist that may be appropriate.
Sources: California Exotic Pest Plant Council, United States Department of Agriculture-Division
of Plant Health and Pest Prevention Services, California Native Plant Society,
Fremontia Vol. 26 No. 4, October 1998, The Jepson Manual; Higher Plants of California,
and County of San Diego-Department of Agriculture.
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APPENDIX ‘B’
Defensible Space Landscaping
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APPENDIX ‘C’
Literature References
Literature References
1. Standard Fire Behavior Fuel Models: A Comprehensive Set for Use with Rothermel’s Surface Fire Spread Model, General Technical Report RMRS-GTR-153. June 2005. Joe H. Scott, Robert E. Burgan, United States Department of Agriculture - Forest Service, Rocky Mountain Research Station, Missoula, Montana.
2. BEHAVEPlus: Fire Modeling System, version 5.0.5: Variables. General Technical Report RMRS-GTR- 213WWW Revised. September 2009. Patricia L. Andrews, United States Department of Agriculture - Forest Service, Rocky Mountain Research Station, Missoula, Montana.
3. BEHAVEPlus Fire Modeling System, Version 5.0.0 General Technical Report RMRS-GRT-106WWW Revised. June 2008. Patricia L. Andrews, Collin D. Bevins and Robe rt C. Seli. United States Department of Agriculture - Forest Service, Rocky Mountain Research Station, Missoula, Montana.
4. BEHAVEPlus Fire Modeling System, Version 5.0 User’s Guide. General Technical Report RMRS-GRT- 106WWW Revised. July 2009. Patricia L. Andrews, Collin D. Bevins, Robert C. Seli. United States Department of Agriculture - Forest Service, Rocky Mountain Research Station, Missoula, Montana.
5. The 2022 California Fire Code Chapter 49
6. The 2022 California Fire Code with Local Amendments
7. The 2022 California Residential Code, Section R337.
8. Chapter 7A-California of the 2022 Building Code
9. National Fire Protection Association - NFPA 13 Standard for the Installation of Sprinkler Systems in One – and Two-Family Dwellings and Manufactured Homes, 13-R &13-D, 2022 Editions
10. National Fire Protection Association - NFPA 1144 Standard for Reducing Structure Ignition Hazards from Wildfire (2018).
11. National Fire Protection Association - NFPA 1142, 2012 Edition. Table C.11 (b) Time-Distance Table Using an Average Speed of 35 mph
12. The California State and Local Responsibility Area Fire Hazard Severity Zone Map – Fire and Resource Assessment Program of CAL FIRE
15. Western Region Climate Center. Historic Climate Data from Remote Automated Weather Stations. RAWS USA Climate Archive. Reno, NV. Data for all Remote Automated Weather Stations is available at:
http://www.raws.dri.edu/index.html
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APPENDIX ‘D’
Non-combustible & Ignition Resistant
Building Materials
Non-Combustible & Ignition Resistant Building Materials For Balconies, Carports, Decks, Patio Covers and Floors
Examples of non-combustible & fire-resistant building materials for balconies, carports decks, patio covers, and floors are as follow:
I. NON-COMBUSTIBLE HEAVY GAGE ALUMINUM MATERIALS - Metals USA Building Products Group - Ultra-Lattice
Ultra-Lattice Stand Alone Patio Cover
Ultra-Lattice Attached Patio Cover
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Ultra-Lattice Solid Patio Cover
Ultra-Lattice Vs. Wood
II. FRX Exterior Fire-Retardant Treated Wood
FRX® fire retardant treated wood may be used in exterior applications permitted by the codes where: public safety is critical, other materials would transfer heat or allow fires to spread, sprinkler systems cannot easily be installed, corrosive atmospheres necessitate excessive maintenance of other materials, or fire protection is inadequate or not readily available. The International Building, Residential and Urban-Wildland Interface Codes and regulations permit the use of fire-retardant treated wood in specific instances. See below for typical exterior uses and typical residential uses.
Typical Exterior Uses
• Balconies
• Decks
Homeowners and Residential
Architects: See this 2-minute video
and the diagram below.
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III. TREX COMPANY, INC –“Trex Accents ®: Fire Defense ™ ” wood and polyethylene composite deck board, nominal 5/4” thick x 5-1/2” width, nominal density of 0.036 lb./in 3 .
Trex Accents®: Fire Defense™
The perfect blend of beauty and brawn.
Trex's #1 selling platform, Trex Accents®, exceeds the strict fire regulations set by the State of California and San Diego County.
• Offers superior safety performance:
o Exceeds ASTM E84 Class B Flame Spread.
o Exceeds 12-7A-4 Part A (underflame) and Part B (Burning Brand). • Self-extinguishing even under extreme fire exposure.
Approved for use by the California State Fire Marshal's Office and San Diego County.
Read the California Department of Forestry and Fire Protection, Office of the State Fire Marshal WILDLAND URBAN INTERFACE (WUI)PRODUCTS Report. (PDF)
For information on fire retardant treated wood for exterior uses, visit www.frxwood.com.
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IV. SOLID “WOOD” DECKING
Company Name: Various Manufacturers
Product Description: Solid “Wood” decking: “Redwood”, “Western Red Cedar”, “Incense Cedar”, “Port Orford Cedar”, and “Alaska Yellow Cedar”.
Sizes: Minimum nominal 2” thickness (American Softwood Lumber Standard PS 20).
Lumber grades: Construction Common and better grades for Redwood, 3 Common and better grades for Cedars, and commercial decking or better grades for both Redwood and Cedars.
Special Instructions: Solid wood decking shall be installed over solid wood joists spacing 24” or less on center.
Decking (SFM Standard 12-7A-4)
V. Vents
Examples of Approved Vents
Brandguard
O’Hagin Fire & Ice® Line – Flame and Ember Resistant
An available option for all O’Hagin attic ventilation products, this attic vent not only features all the same design, construction elements and color choices as the O’Hagin Standard Line, but also features an interior stainless-steel matrix that resists the intrusion
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of flames and embers. This patent-pending attic vent is accepted for use by many local fire officials for installation in Wildland Urban Interface (WUI) zones.
Vulcan Vents
The founders of Gunter Manufacturing have been working closely over the last two years, with the scientists and inventors of Vulcan Technologies to bring to market this incredible product.
Combining our quality vent products with the fire-stopping honeycomb matrix core designed by Vulcan has produced unique and remarkable results.
Gunter manufacturing has over 50 years of combined sheet metal manufacturing experience.
Special orders are not a problem. Their vent frames are industry standard frames so there is little or no learning curve for installers and contractors. Their stated goal is to provide people with the vents they need to secure their homes with additional safety against wildfires and give them piece of mind from knowing that their home or structure is protected by a product that works!
The core of their fire and ember safe vents are manufactured out of hi-grade aluminum honeycomb and coated with an intumescent coating made by FireFree Coatings. The intumescent coating is designed to quickly swell up and close off when exposed to high heat. The expanded material acts as an insulator to heat, fire, and embers
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Before After
After the cells close off, they are extremely well insulated, and fire or embers cannot penetrate.
Even before the cells close off, the vent is designed to protect against flying embers. In many cases embers will attack a structure before fire ever comes near, so this feature is especially important.
Close-up of the coated honeycomb matrix.
Fire easily passes through a standard vent, on the left, but stops cold when it comes up against a Vulcan Vent shown on right.
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APPENDIX ‘E’
Ignition Resistant Construction Requirements
The following is a summary of the current requirements for ignition resistant construction for high fire hazard areas under Chapter 7A of the California Building Code (CBC) 2022 edition. However the requirements listed below are not all inclusive and all exterior building construction including roofs, eaves, exterior walls, d oors, windows, decks, and other attachments must meet the current CBC Chapter 7A ignition resistance requirements, the California Fire Code, and any additional County and/or City codes in effect at the time of building permit application. See the currrent applicable codes for a detailed description of these requirements and any exceptions.
1. All structures will be built with a Class A Roof Assembly and shall comply with the requirements of Chapter 7A and Chapter 15 of the California Fire Code. Roofs shall have a roofing assembly installed in ac cordance with its listing and the manufacturer’s installation instructions.
2. Roof valley flashings shall be not less than 0.019-inch (0.48 mm) No. 26 gage galvanized sheet corrosion-resistant metal installed over not less than one layer of minimum 72-pound (32.4 kg) mineral-surfaced nonperforated cap sheet complying with ASTM D3909, at least 36-inch-wide (914 mm) running the full length of the valley.
3. Attic or foundation ventilation louvers or ventilation openings in vertical walls shall be covered with a minimum of 1/16 -inch and shall not exceed 1/8 -inch mesh corrosion - resistant metal screening or other approved material that offers equivalent protection.
4. Where the roof profile allows a space between the roof covering and roof decking, the spaces shall be constructed to resist the intrusion of flames and embers, be fire stopped with approved materials or have one layer of a minimum 72 pound (32.4 kg) mineral - surfaced nonperforated cap sheet complying with ASTM D3909 installed over the combustible decking.
5. Enclosed roof eaves and roof eave soffits with a horizontal underside, sloping rafter tails with an exterior covering applied to the under-side of the rafter tails, shall be protected by one of the following:
• noncombustible material
• Ignition-resistant material
• One layer of 5/8-inch Type X gypsum sheathing applied behind an exterior covering on the underside of the rafter tails or soffit • The exterior portion of a 1-hour fire resistive exterior wall assembly applied to the underside of the rafter tails or soffit including assemblies using the gypsum panel and sheathing products listed in the Gypsum Association Fire Resistance Design Manual
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• Boxed-in roof eave soffit assemblies with a horizontal underside that meet the performance criteria in Section 707A.10 when tested in accordance with the test procedures set forth in ASTM E2957.
• Boxed-in roof eave soffit assemblies with a horizontal underside that meet the performance criteria in accordance with the test procedures set forth in SFM Standard 12-7A-3.
Exceptions: The following materials do not require protection:
1. Gable end overhangs and roof assembly projections beyond an exterior wall other than at the lower end of the rafter tails.
2. Fascia and other architectural trim boards.
6. The exposed roof deck on the underside of unenclosed roof eaves shall consist of one of the following:
• Noncombustible material, or
• Ignition-resistant material, or
• One layer of 5/8-inch Type X gypsum sheathing applied behind an exterior covering on the underside exterior of the roof deck, or • The exterior portion of a 1-hour fire resistive exterior wall assembly applied to the underside of the roof deck designed for exterior fire exposure including assemblies using the gypsum panel and sheathing products listed in the Gypsum Association fire Resistance Design Manual.
Exceptions: The following materials do not require protection:
1. Solid wood rafter tails on the exposed underside of open roof eaves having a minimum nominal dimension of 2 inch (50.8 mm).
2. Solid wood blocking installed between rafter tails on the exposed underside of open roof eaves having a minimum nominal dimension of 2 inch (50.8 mm).
3. Gable end overhangs and roof assembly projections beyond an exterior wall other than at the lower end of the rafter tails.
4. Fascia and other architectural trim boards.
7. Vents - ventilation openings for enclo sed attics, enclosed eave soffit spaces, enclosed rafter spaces formed where ceilings are applied directly to the underside of roof rafters, and underfloor ventilation openings shall be fully covered with metal wire mesh, vents, other materials or other devices that meet one of the following requirements:
A. Vents listed to ASTM E2886 and complying with all the following:
i. There shall be no flaming ignition of the cotton material during the Ember Intrusion Test.
ii. There shall be no flaming ignition during the Integrity Test portion of the Flame Intrusion Test.
iii. The maximum temperature of the unexposed side of the vent shall not exceed 662°F (350°C).
B. Vents shall comply with all the following:
i. The dimensions of the openings therein shall be a minimum of 1/16-inch (1.6 mm) and shall not exceed 1/8-inch (3.2 mm).
ii. The materials used shall be noncombustible.
Exception: Vents located under the roof covering, along the ridge of roofs, with the exposed surface of the vent covered by noncombustible wire mesh, may be of combustible materials.
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iii. The materials used shall be corrosion resistant.
8. Vents shall not be installed on the underside of eaves and cornices.
Exceptions:
1. Vents listed to ASTM E2886 and complying with all the following:
• There shall be no flaming ignition of the cotton material during the Ember Intrusion Test.
• There shall be no flaming ignition during the Integrity Test portion of the Flame Intrusion Test.
• The maximum temperature of the unexposed side of the vent shall not exceed 662°F (350°C).
2. The enforcing agency shall be permitted to accept or approve special eave and cornice vents that resist the intrusion of flame and burning embers.
3. Vents complying with the requirements of Section 706 A.2 shall be permitted to be installed on the underside of eaves and cornices in accordance with either one of the following conditions:
3.1. The attic space being ventilated is fully protected by an automatic sprinkler system installed in accordance with Section 903.3.1.1 or,
3.2. The exterior wall covering, and exposed underside of the eave are of noncombustible materials, or ignition-resistant materials, as determined in accordance with SFM Standard 12-7A-5 Ignition-Resistant Material and the requirements
9. All chimney, flue or stovepipe openings that will burn solid wood will have an approved spark arrester. An approved spark arrester is defined as a device constructed of nonflammable materials, having a heat and corrosion resistance equivalent to 12 -gauge wire, 19 -game galvanized steel or 24 -gage stainless steel. or other material found satisfactory by the Fire Protection District, having ½-inch perforations for arresting burning carbon or sparks nor block spheres having a diameter less than 3/8 inch (9.55 mm). It shall be installed to be visible for the purposes of inspection and maintenance and removeable to allow for cleaning of the chimney flue.
10. All residential structures will have automatic interior fire sprinklers installed according to the Nation al Fire Protection Association (NFPA) 13R 2019 edition - Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies.
11. The exterior wall covering, or wall assembly shall comply with one of the following requirements:
• Noncombustible material, or
• Ignition resistant material, or
• Heavy timber exterior wall assembly, or
• Log wall construction assembly, or
• Wall assemblies that have been tested in accordance with the test procedures for a 10-minute direct flame contact expose test set forth in ASTM E2707 with the conditions of acceptance shown in Section 707A.3.1 of the California Building Code, or
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• Wall assemblies that meet the performance criteria in accordance with the test procedures for a 10-minute direct flame contact exposure test set forth in SFM Standard 12-7A-1.
Exception: Any of the following shall be deemed to meet the assembly performance criteria and intent of this section including;
• One layer of 5/8-inch Type X gypsum sheathing applied behind the exterior covering or cladding on the exterior side of the framing, or • The exterior portion of a 1-hour fire resistive exterior wall assembly designed for exterior fire exposure includes assemblies using the gypsum panel and sheathing products listed in the Gypsum Associate Fire Resistance Design Manual.
12. Exterior walls shall extend from the top of the foundation to the roof and terminate at 2-inch nominal solid blocking between rafters at all roof overha ngs, or in the case of enclosed eaves, terminate at the enclosure.
13. Gutters shall be provided with the means to prevent the accumulation of leaf litter and debris within the gutter that contribute to roof edge ignition.
14. No attic ventilation openings or ventilation louvers shall be permitted in soffits, in eave overhangs, between rafters at eaves, or in other overhanging areas.
15. All projections (exterior balconies, decks, patio covers, unenclosed roofs and floors, and similar architectural app endages and projections) or structures less than five feet from a building shall be of non -combustible material, one -hour fire resistive construction on the underside, heavy timber construction or pressure-treated exterior fire-retardant wood. When such appendages and projections are attached to exterior fire -resistive walls, they shall be constructed to maintain the same fire-resistant standards as the exterior walls of the structure.
16. Deck Surfaces shall be constructed with one of the following materials:
• Material that complies with the performance requirements of Section 709A.4 when tested in accordance with both ASTM E2632 and ASTM E2726, or • Ignition-resistant material that complies with the performance requirements of 704A.3 when tested in accordance with ASTM E84 or UL 723, or • Material that complies with the performance requirements of both SFM Standard 12- 7A-4 and SFM Standard 12-7A-5, or
• Exterior fire retardant treated wood, or
• Noncombustible material, or
• Any material that complies with the performance requirements of SFM Standard 12- 7A-4A when the attached exterior wall covering is also composed of noncombustible or ignition-resistant material.
17. Accessory structures attached to buildings with habitable spaces and projections shall be in accordance with the Building Code. When the attached structure is located and constructed so that the structure or any portion thereof projects over a descending slope surface greater than 10 percent, the area below the structure shall have all underfloor areas and exterior wall construction in accordance with Chapter 7A of the Building Code.
FIREWISE2000, LLC APPENDIX
18. Exterior windows, skylights and exterior glazed door assemblies shall com ply with one of the following requirements:
• Be constructed of multiplane glazing with a minimum of one tempered pane meeting the requirements of Section 2406 Safety Glazing, or
• Be constructed of glass block units, or
• Have a fire-resistance rating of not less than 20 minutes when tested according to NFPA 257, or
• Be tested to meet the performance requirements of SFM Standard 12-7A-2.
19. All eaves, fascia and soffits will be enclosed (boxed) with non-combustible materials. This shall apply to the entire perimeter of each structure. Eaves of heavy timber construction are not required to be enclosed as lon g as attic venting is not installed in the eaves. For the purposes of this section, heavy timber construction shall consist of a minimum of 4x6 rafter ties and 2x decking.
20. Detached accessory buildings that are less than 120 square feet in floor area and are located more than 30 feet but less than 50 feet from an applicable building shall be constructed of noncombustible materials or of ignition-resistant materials as described in Section 704A.2 of the California Building Code.
Exception: Accessory structures less than 120 square feet in floor area located at least 30 feet from a building containing a habitable space.
21. All rain gutters, down spouts and gutter hardware shall be constructed from metal or other noncombustible material to prevent wildfire ignition along eave assemblies.
22. All side yard fence and gate assemblies (fences, gate and gate posts) when attached to the home shall be of non -combustable material. The first five feet of fences and other items attached to a structure shall be of non-combustible material.
23. Exterior garage doors shall resist the intrusion of embers from entering by preventing gaps between doors and door openings, at the bottom, sides and tops of doors, from exceeding 1/8 inch. Gaps between doors and door openings shall be controlled by one of the methods listed in this section.
• Weather-stripping products made of materials that:
(a) have been tested for tensile strength in accordance with ASTM D638 (Standard Test Method for Tensile Properties of Plastics) after exposure to ASTM G155 (Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non- Metallic Materials) for a period of 2,000 hours, where the maximum allowable difference in tensile strength values between exposed and non-exposed samples does not exceed 10%; and (b) exhibit a V-2 or better flammability rating when tested to UL 94, Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances.
• Door overlaps onto jambs and headers.
• Garage door jambs and headers covered with metal flashing.
24. Exterior doors shall comply with one of the following:
1. The exterior surface or cladding shall be of noncombustible material or,
FIREWISE2000, LLC APPENDIX
2. The exterior surface or cladding shall be of ignition-resistant material or,
3. The exterior door shall be constructed of solid core wood that complies with the following requirements:
3.1. Stiles and rails shall not be less than 1-3/8 inches thick.
3.2. Panels shall not be less than 1-1/4 inches thick, except for the exterior perimeter of the panel that shall be permitted to taper to a tongue not less than 3/8 inch thick.
4. The exterior door assembly shall have a fire-resistance rating of not less than 20 minutes when tested according to NFPA 252 or,
5. The exterior surface or cladding shall be tested to meet the performance requirements of Section 707A.3.1 when tested in accordance with ASTM E2707 or,
6. The exterior surface or cladding shall be tested to meet the performance requirements of SFM Standard 12-7A-1.
25. Fire access tunnels shall have two hour rated walls consisting of two layers of 5/8” Type ‘X’ gypsum wallboard panels on each side of the studs. The EZ Taping Systems “Fire Tape” product or equivalent should be used as an alternative to convention joint tape when:
1. Two or more layers of listed Type ‘X’ gypsum wallboard are applied vertically with joints staggered and joints of the face board are”:
a. Tightly butted and taped with EZ Taping Systems ”Fire Tape” or equivalent product or
b. Finished with joint compound of EZ Taping Systems “Fire Tape” or equivalent product if the gap between gypsum wallboard panels is visible at the joint.
2. Two or more layers of USG “Sheetrock” Fire code C gypsum wallboard are applied (horizontally or vertically).
3. Gypsum panels shall be attached with Type S drywall screws, placed 8” oc to vertical edges and 12” oc to top and bottom runners and intermediate studs.
4. Fire Tape shall be nominal 2” wide and applied on the vertical joints at studs.
** FAHJ – Fire Authority Having Jurisdiction
SFM – State Fire Marshal
NFPA – National Fire Protection Association
FIREWISE2000, LLC APPENDIX
APPENDIX ‘F’
Site Plan and Fuel Treatment Exhibit
These Documents must be included at time of submittal
FIREWISE2000, LLC APPENDIX
APPENDIX ‘G’
Approved AM&M Request
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Preliminary Project Specific
Water Quality Management Plan
For Alpine Project PM 38174 located within the Santa Ana Watershed Region of Riverside County
Project Title: FOUR LOT SUBDIVISION – 841 ALPINE MEADOWS LANE Development No: GP-2022-04952
Design Review/Case No: PLANNING CASE PR-2021-001078
Original Date Prepared: 03-01-2022
Revision Date(s): 2/19/23
Prepared for Compliance with
Regional Board Order No. R8-2010-0033
Contact Information:
Prepared for:
Jerardo R Reyes
785 Woodcrest Court
Bloomington, Ca, 92316
909-471-0342
[email protected]
Prepared by:
Michael Ackerman
Ackerman Associates 2000. Inc.
Corona, CA
909-263-1734
[email protected]
Preliminary
Final
- 2 -
OWNER’S CERTIFICATION
This Project-Specific Water Quality Management Plan (WQMP) has been prepared for Ryan Williams and Jerardo R Reyes by Ackerman Associates 2000, Inc. for the PM 38174 4-unit subdivision project.
This WQMP is intended to comply with the requirements of the City of Riverside for Design Review and Certificate of Appropria teness, Planning Case No. PR-2021-001078 which includes the requirement for the preparation and implementation of a Project-Specific WQMP.
The undersigned, while owning the property/project described in the preceding paragraph, shall be responsible for the implementation and funding of this WQMP and will ensure that this WQMP is amended as appropriate to reflect up -to-date conditions on the s ite. In addition, the property owner accepts responsibility for interim operation and maintenance of Stormwater BMPs until such time as this responsibility is formally transferred to a subsequent owner. This WQMP will be reviewed with the facility operato r, facility supervisors, employees, tenants, maintenance and service contractors, or any other party (or parties) having responsibility for implementing portions of this WQMP. At least one copy of this WQMP will be maintained at the project site or projec t office in perpetuity. The undersigned is authorized to certify and to approve implementation of this WQMP. The undersigned is aware that implementation of this WQMP is enforceable under the City of Riverside Water Quality Ordinance (Municipal Code Section 14.12.315).
"I, the undersigned, certify under penalty of law that the provisions of this WQMP have been reviewed and accepted and that the WQMP will be transferred to future successors in interest."
03-01-2023
Owners’ Signature Date
Ryan Williams and Jerardo R Reyes Owner
Owners’ Printed Name Owners’ Title/Position
PREPARER’S CERTIFICATION
“The selection, sizing and design of stormwater treatment and other stormwater quality and quantity control measures in this plan meet the requirements of Regional Water Quality Control Board Order No. R8-2010-0033 and any subsequent amendments thereto.”
03-01-2023
Preparer’s Signature Date
Michael Ackerman Engineer
Preparer’s Printed Name Preparer’s Title/Position
Preparer’s Licensure: C64663 Exp. 6-30-2023
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Table of Contents
Section A: Project and Site Information........................................................................................................ 5 A.1 Maps and Site Plans ............................................................................................................................ 5 A.2 Identify Receiving Waters ................................................................................................................... 6 A.3 Additional Permits/Approvals required for the Project: .................................................................... 6 Section B: Optimize Site Utilization (LID Principles) ..................................................................................... 7 Section C: Delineate Drainage Management Areas (DMAs) ......................................................................... 8 Section D: Implement LID BMPs ................................................................................................................. 10 D.1 Infiltration Applicability .................................................................................................................... 10 D.2 Harvest and Use Assessment – N/A ................................................................................................. 11 D.3 Bioretention and Biotreatment Assessment .................................................................................... 12 D.4 Feasibility Assessment Summaries ................................................................................................... 13 D.5 LID BMP Sizing .................................................................................................................................. 14 Section E: Alternative Compliance (LID Waiver Program) .......................................................................... 15 Section F: Hydromodification ..................................................................................................................... 16 F.1 Hydrologic Conditions of Concern (HCOC) Analysis .......................................................................... 16 Section G: Source Control BMPs ................................................................................................................. 18 Section H: Construction Plan Checklist ....................................................................................................... 19 Section I: Operation, Maintenance and Funding ........................................................................................ 20
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List of Tables
Table A.2 Other Applicable Permits .............................................................................................................. 6 Table C.1 DMA Classifications ....................................................................................................................... 8 Table C.2 Type ‘A’, Self-Treating Areas ......................................................................................................... 8 Table C.3 Type ‘B’, Self-Retaining Areas ....................................................................................................... 8 Table C.4 Type ‘C’, Areas that Drain to Self-Retaining Areas ........................................................................ 9 Table C.5 Type ‘D’, Areas Draining to BMPs ................................................................................................. 9 Table D.1 Infiltration Feasibility .................................................................................................................. 10 Table D.2 LID Prioritization Summary Matrix ............................................................................................. 13 Table D.3 DCV Calculations for LID BMPs ................................................................................................... 14 Table G.1 Permanent and Operational Source Control Measures ............................................................. 18 Table H.1 Construction Plan Cross-reference ............................................................................................. 19
List of Appendices
Appendix 1: Maps and Site Plans ................................................................................................................ 21 Appendix 2: Construction Plans .................................................................................................................. 24 Appendix 3: Soils Information ..................................................................................................................... 25 Appendix 4: Historical Site Conditions ........................................................................................................ 26 Appendix 5: LID Infeasibility ........................................................................................................................ 27 Appendix 6: BMP Design Details ................................................................................................................. 28 Appendix 7: Hydromodification .................................................................................................................. 29 Appendix 8: Source Control ........................................................................................................................ 30 Appendix 9: O&M ....................................................................................................................................... 31 Appendix 10: Educational Materials ........................................................................................................... 32
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Section A: Project and Site Information
The existing single family residential site will be subdivided into 4 lots. Stormwater will drain to landscaped self retaining areas.
PROJECT INFORMATION
Type of Project: Residential
Ward Area: Ward 4
Community Name: Alpine
Development Name: Alpine PM 38174
PROJECT LOCATION
Latitude & Longitude (DMS): 33°54'37.5"N 117°21'48.1"W
Project Watershed and Sub-Watershed: Santa Ana River, Reach 3
APN(s): 243-600-025
Map Book and Page No.: 57/31
PROJECT CHARACTERISTICS
Proposed or Potential Land Use(s) Residential
Proposed or Potential SIC Code(s) 1522
Area of Impervious Project Footprint (SF) 12,200
Total Area of proposed Impervious Surfaces within the Project Footprint (SF)/or Replacement 30,500 Does the project consist of offsite road improvements? Y N Does the project propose to construct unpaved roads? Y N Is the project part of a larger common plan of development (phased project)? Y N
EXISTING SITE CHARACTERISTICS
Total area of existing Impervious Surfaces within the Project limits Footprint (SF) 0 Is the project located within any MSHCP Criteria Cell? Y N If so, identify the Cell number:
Are there any natural hydrologic features on the project site? Y N Is a Geotechnical Report attached? Y N
If no Geotech. Report, list the NRCS soils type(s) present on the site (A, B, C and/or D) C What is the Water Quality Design Storm Depth for the project? 0.6 in A.1 Maps and Site Plans
Appendix 1 includes a map of the local vicinity and existing site. In addition, WQMP Site Plan, located in Appendix 1, includes the following:
• Drainage Management Areas
• Proposed Structural BMPs
• Drainage Path
• Drainage Infrastructure, Inlets, Overflows
• Source Control BMPs
• Buildings, Roof Lines, Downspouts
• Impervious Surfaces
• Standard Labeling
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A.2 Identify Receiving Waters
In order of upstream to downstream, the receiving waters that the project site is tributary to are as follows. A map of the receiving waters is included in Appendix 1.
Receiving Waters Hydrologic
Unit
EPA Approved
303(d) List
Impairments
Designated
Beneficial Uses
Proximity to RARE
Beneficial Use
Santa Ana River, Reach 3 801.21 Pathogens AGR, GWR, REC1, REC2, WARM, WILD, RARE, SPWN 20 miles
A.3 Additional Permits/Approvals required for the Project:
Table A.1 Other Applicable Permits
Agency Permit Required
State Department of Fish and Game, 1602 Streambed Alteration Agreement Y N State Water Resources Control Board, Clean Water Act (CWA) Section 401 Water Quality Cert. Y N US Army Corps of Engineers, CWA Section 404 Permit Y N US Fish and Wildlife, Endangered Species Act Section 7 Biological Opinion Y N Statewide Construction General Permit Coverage Y N
Statewide Industrial General Permit Coverage Y N
Western Riverside MSHCP Consistency Approval (e.g., JPR, DBESP) Y N Other (please list in the space below as required)
City of Riverside Conditional Use Permit
City of Riverside Design Review
City of Riverside Building Permit
City of Riverside Grading Permit
City of Riverside Construction Permit
Y
Y
Y
Y
Y
N
N
N
N
N
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Section B: Optimize Site Utilization (LID Principles)
Site Optimization
Did you identify and preserve existing drainage patterns? If so, how? If not, why? Yes. Integrating existing drainage patterns into the site plan help ed maintain the site’s predevelopment hydrologic function. Drainage patterns were inferred from topographic data. Analysis of the existing site drainage patterns during the site assessment phase of the project help ed to identify the best locations for stormwater BMPs. Mild gradients are utilized to extend the time of concentration which reduces peak flows and increases the potential for additional infiltration.
Did you identify and protect existing vegetation? If so, how? If not, why? Yes. Project pro tected existing vegetation where practicable and avoid ance of disturbance to these areas was incorporated into design. Natural vegetation was preserved where practicable.
Did you identify and preserve natural infiltration capacity? If so, how? If not, why? Yes. A key component of LID is taking advantage of a site’s natural infiltration and storage capacity.
Planting areas and surface infiltration were added to the project.
Did you identify and minimize impervious area? If so, how? If not, why? Yes. Minimization of impervious cover was considered during design. The overall coverage of paving was limited. Site layout and circulation patterns where landscaping could be adjacent to impervious pavement were identified.
Did you identify and disperse runoff to adjacent pervious areas? If so, how? If not, why? Yes. Runoff is directed from impervious areas to adjacent landscaping minimizing d irectly connecting impervious areas. Runoff is detained and retained throughout the site where practicable.
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Section C: Delineate D rainage Management Areas
(DMAs)
Table C.1 DMA Classifications
DMA Name or ID Surface Type(s)12 Area (Sq. Ft.) DMA Type DMA 1 LANDSCAPE 79,984 SELF TREATING
DMA 5, 8 LANDSCAPE 25,300; 26,600 SELF TREATING
DMA 3, 6, 9 RESIDENTIAL 13,900; 19,250; 18,000 DRAINS TO SELF RETAINING DMA 4, 7, 10 LANDSCAPE 3200; 3200; 3200 SELF RETAINING
Table C.2 Type ‘A’, Self-Treating Areas
DMA Name or ID Area (Sq. Ft.) Stabilization Type Irrigation Type (if any) DMA 1 49,000 LANDSCAPE DRIP/NONE
DMA 5 25,300 LANDSCAPE DRIP/NONE
DMA 8 26,600 LANDSCAPE DRIP/NONE
Table C.3 Type ‘B’, Self-Retaining Areas
Self-Retaining Area
Type ‘C’ DMAs that are draining to the Self -Retaining
Area
DMA
Name/ ID
Post-project
surface type
Area
(square
feet)
Storm
Depth
(inches) DMA Name /
ID
[C] from T able C.4
=
Required Retention Depth
(inches)
[A] [B] [C] [D]
DMA 4 LANDSCAPED 3200 0.6 DMA 3 6100 1.74
DMA 7 LANDSCAPED 3200 0.6 DMA 6 6100 1.74
DMA 10
LANDSCAPED 3200 0.6 DMA 9 6100 1.74
[𝐷𝐷] = [𝐵𝐵] +
[𝐵𝐵] ∙ [𝐶𝐶]
[𝐴𝐴]
- 9 -
Table C.4 Type ‘C’, Areas that Drain to Self-Retaining Areas DMA Receiving Self-Retaining DMA
DMA Name/ ID
Area
(square feet)
Post-project
surface type
Impervious
fraction
Product
DMA name /ID
Area (square
feet) Ratio
[A] [B] [C] = [A] x [B] [D] [C]/[D]
DMA 3 13,900 RESIDENTIAL 0.44 6100 DMA 4 3200 1.9
DMA 6 19,250 RESIDENTIAL 0.31 6100 DMA 7 3200 1.9
DMA 9 18,000 RESIDENTIAL 0.33 6100 DMA 10 3200 1.9
Table C.5 Type ‘D’, Areas Draining to BMPs
DMA Name or ID BMP Name or ID
NA NA
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Section D: Implement LID BMPs
D.1 Infiltration Applicability
Is there an approved downstream ‘Highest and Best Use’ for stormwater runoff (ref: Chapter 2.4.4 of the WQMP Guidance Document)? Y N
Geotechnical Report
A Geotechnical Report or Phase I Environmental Site Assessment may be required by the Copermittee to confirm present and past site characteristics that may affect the use of Infiltration BMPs.
Is this project classified as a small project? Y N
Infiltration Feasibility
Table D.1 Infiltration Feasibility
Does the project site… YES NO
…have any DMAs with a seasonal high groundwater mark shallower than 10 feet? X If Yes, list affected DMAs:
…have any DMAs located within 100 feet of a water supply well? X If Yes, list affected DMAs:
…have any areas identified by the geotechnical report as posing a public safety risk where infiltration of stormwater could have a negative impact?
X
If Yes, list affected DMAs:
…have measured average in-situ infiltration rates of less than 1.6 inches / hour? X If Yes, list affected DMAs:
…have significant cut and/or fill conditions that would preclude in-situ testing of infiltration rates at the final infiltration surface?
X
If Yes, list affected DMAs:
…geotechnical report identify other site-specific factors that would preclude effective and safe infiltration? X Describe here:
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D.2 Harvest and Use Assessment
Please check what applies:
☐ Reclaimed water will be used for the non-potable water demands for the project. ☐Downstream water rights may be impacted by Harvest and Use as approved by the Regional Board (verify with the Copermittee).
☐The Design Capture Volume will be addressed us ing Infiltration Only BMPs . In such a case, Harvest and Use BMPs are still encourage d, but it would not be required if the Design Capture Volume will be infiltrated or evapotranspired.
☒ None of the above.
Harvest and Use BMPs need not be assessed for the site.
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D.3 Bioretention and Biotreatment Assessment
Other LID Bioretention and Biotreatment BMPs as described in Chapter 2 .4.7 of the WQMP Guidance Document are feasible on nearly all development sites with sufficient advance planning.
Select one of the following:
☐ LID Bioretention/Biotreatment BMPs will be used for some or all DMAs of the project as noted below in Section D.4.
☐ A site -specific analysis demonstrating the technical infeasibility of all LID BMPs has been performed and is included in Appendix 5 . If you plan to submit an analysis demonstrating the technical infeasibility of LID BMPs, request a pre -submittal meeting wi th the Copermittee to discuss this option. Proceed to Section E to document your alternative compliance measures.
☒ None of the above.
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D.4 Feasibility Assessment Summaries
Table D.2 LID Prioritization Summary Matrix
DMA
Name/ID
LID BMP Hierarchy No LID
(Alternative
Compliance) 1. Infiltration 2. Harvest and use 3. Bioretention 4. Biotreatment NA
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D.5 LID BMP Sizing
Table D.3 DCV Calculations for LID BMPs
DMA
Type/I
D
DMA
Area
(square
feet)
Post-Project
Surface Type
Effective
Impervious
Fraction, If
DMA
Runof
f
Factor
DMA
Areas x
Runoff
Factor BMP 1
[A] [B] [C] [A] x
[C]
NA
Design
Storm
Depth
(in)
Design
Capture
Volume,
VBMP (cubic
feet)
Proposed
Volume
on Plans
(cubic
feet)
.
AT = Σ= [ D]
= [E]= [F] =
[D]x[E
12 =
[G] =
[B], [C] is obtained as described in Section 2.3.1 of the WQMP Guidance Document [E] is obtained from Exhibit A in the WQMP Guidance Document [G] is obtained from a design procedure sheet, such as in LID BMP Design Handbook and placed in Appendix 6
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Section E: Alternative Compliance (LID Waiver Program)
LID BMPs are expected to be feasible on virtually all projects. Where LID BMPs have been demonstrated to be infeasible as documented in Section D , other Treatment Control BMPs must be used (subject to LID waiver approval by the Copermittee). Check one of the following Boxes:
☒ LID Principles and LID BMPs have been incorporated into the site design to fully address all Drainage Management Areas. No alternative compliance measure s are required for this project and thus this Section is not required to be completed.
- Or -
☐ The following Drainage Management Areas are unable to be addressed using LID BMPs. A site-specific analysis demonstrating technical infeasibility of LID BMPs has been approved by the Co-Permittee and included in Appendix 5 . Additionally, no downstream regional and/or sub - regional LID BMPs exist or are available for use by the project. The following alt ernative compliance measures on the following pages are being implemented to ensure that any pollutant loads expected to be discharged by not incorporating LID BMPs, are fully mitigated.
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Section F: Hydromodification
F.1 Hydrologic Conditions of Concern (HCOC) Analysis
The project does not create a Hydrologic Condition of Concern, meeting the criteria for HCOC Exemption as shown below:
HCOC EXEMPTION 1: The Priority Development Project disturbs less than one acre. The City of Riverside has the discretion to require a Pr oject-Specific WQMP to address HCOCs on projects less than one acre on a case by case basis. The disturbed area calculation should include all disturbances associated with larger common plans of development.
Does the project qualify for this HCOC Exemption? Y N
HCOC EXEMPTION 2 : The volume and time of concentration 1 of storm water runoff for the post - development condition is not significantly different from the pre-development condition for a 2-year return frequency storm (a difference of 5% or less is considered insignificant) using one of the following methods to calculate:
• Riverside County Hydrology Manual
• Technical Release 55 (TR -55): Urban Hydrology for Small Watersheds (NRCS 1986), or derivatives thereof, such as the Santa Barbara Urban Hydrograph Method • Other methods acceptable to the City of Riverside
Does the project qualify for this HCOC Exemption? Y N Results included in Table F.1 below and hydrologic analysis included in Appendix 7.
Table F.1 Hydrologic Conditions of Concern Summary
2 year – 24 hour
Pre-condition Post-condition % Difference
Time of
Concentration
INSERT VALUE INSERT VALUE INSERT VALUE
Flow (CFS) INSERT VALUE INSERT VALUE INSERT VALUE
Volume (Cubic Feet) INSERT VALUE INSERT VALUE INSERT VALUE 1 Time of concentration is defined as the time after the beginning of the rainfall when all portions of the drainage basin are contributing to flow at the outlet.
- 17 -
HCOC EXEMPTION 3: All downstream conveyance channels to an adequate sump (Prado Dam, Santa Ana River) that will receive runoff from the project are engineered and regularly maintained to ensure design flow capacity; no sensitive stream habitat areas will be adversely affected; or are not identified on the Co-Permittees Hydromodification Sensitivity Maps.
Does the project qualify for this HCOC Exemption? Y N
F.2 HCOC Mitigation
As an alternative to the HCOC Exemption Criteria above, HCOC criteria is considered mitigated if the project meets one of the following conditions, as indicated:
a. Additional LID BMPS are implemented onsite or offsite to mitigate potential erosion or habitat impacts as a result of HCOCs. This can be conducted by an evaluation of site -specific conditions utilizing accepted professional methodologies published by entit ies such as the California Stormwater Quality Association (CASQA), the Southern California Coastal Water Research Project (SCCRWP), or other Co -Permittee approved methodologies for site- specific HCOC analysis.
b. The project is developed consistent with an approved Watershed Action Plan that addresses HCOC in Receiving Waters.
c. Mimicking the pre -development hydrograph with the post -development hydrograph, for a 2 - year return frequency storm. Generally, the hydrologic conditions of concern are not significant, if the post -development hydrograph is no more than 10% greater than pre -development hydrograph. In cases where excess volume cannot be infiltrated or captured and reused, discharge from the site must be limited to a flow rate no greater than 110% of the pre - development 2-year peak flow.
d. None of the above.
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Section G: Source Control BMPs
The following table identifies the potential sources of runoff pollutants for this project and specifies how they are addressed through permanent controls and operational BMPs:
Table G.1 Permanent and Operational Source Control Measures Potential Sources of Runoff
pollutants
Permanent Structural Source
Control BMPs
Operational Source Control BMPs
Driveways and sidewalks Sweep driveways and sidewalks
regularly to prevent
accumulation of litter and debris.
Collect debris from pressure
washing to prevent entry into
the storm drain system. Collect
wash water containing any
cleaning agent or degreaser and
discharge to the sanitary sewer
not to a storm drain.
Landscape, Irrigation and
Outdoor Pesticide Use
Maintain landscaping using
minimal or no pesticides.
Refuse Area Inspect receptacles regularly;
repair or replace leaky
receptacles. Keep receptacles
covered. Prohibit/prevent
dumping of liquid or hazardous
wastes. Inspect and pick up
litter daily and clean up spills
immediately.
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Section H: Construction Plan Checklist
Table H.1 Construction Plan Cross-reference
BMP No.
or ID
BMP Identifier and Description Plan Sheet
Number(s)
Latitude / Longitude
DMA 4 SELF RETAINING AREA 2 33.910594, 117.363849
DMA 7 SELF RETAINING AREA 2 33.910629, 117.363444
DMA 10 SELF RETAINING AREA 2 33.910620, 117.362941
- 20 -
Section I: Operation, Maintenance and Funding
As required by the City of Riverside, the following Op eration, Maintenance and Funding details are provided as summarized:
1. A means to finance and implement facility maintenance in perpetuity , including replacement cost.
2. Acceptance of responsibility for maintenance from the time the BMPs are constructed until responsibility for operation and maintenance is legally transferred.
3. An outline of general maintenance requirements for the Stormwater BMPs selected.
4. Figures delineating and designating pervious and impervious areas, location, and type of Stormwater BMP, and tables of pervious and impervious areas served by each facility.
5. A separate list and location of self- retaining areas or areas addressed by LID Principles that do not require specialized O&M or inspections but will require ty pical landscape maintenance as noted in Chapter 5, pages 85-86, in the WQMP Guidance.
See Appendix 9 for a detailed Stormwater BMP Operation and Maintenance Plan that sets forth a maintenance schedule for each of the Stormwater BMPs built on site , and a n a greement assigning responsibility for maintenance and providing for inspections and certification.
Maintenance Mechanism: Owner maintained. Covenant & Agreement Will the proposed BMPs be maintained by a Home Owners’ Association (HOA) or Property Owners Association (POA)?
Y N
Operation and Maintenance Plan and Maintenance Mechanism is included in Appendix 9. Educational materials for those personnel that will be maintaining the proposed BMPs within this Project -Specific WQMP are included in Appendix 10.
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Appendix 1: Maps and Site Plans
Location Map, WQMP Site Plan and Receiving Waters Map
LOCATION MAP
- 21 -
WQMP SITE PLAN WITH DRAINAGE MANAGEMENT AREAS