Manhattan Beach City Council
September 6, 2022

GREATER LOS ANGELES COUNTY 2013 IRWM PLAN
2017 AMENDMENTS

1. CHAPTER 1 GOVERNANCE AND PARTICIPATION
a. Section 1.1 Background (page 1-2) - Revised to reference California Water Plan Update 2013.

As noted in the California Water Plan Update 2009 (Bulletin No. 160-09) and Update 2013:

The watersheds of the Metropolitan Los Angeles Planning Area have been subjected to some of the densest urbanization in California and have issues associated with urban runoff, groundwater contamination, and the loss of major historical ecosystems." This Plan also provides an opportunity to include information on the Region's needs and future at a scale that can contribute to the California Water Plan. b. Figure 1-2 Leadership Committee Representation (page 1-6) - Revised organization chart (attachment) and description of representation for the Lower San Gabriel and Los Angeles Rivers Subregion.

Lower San Gabriel and Los Angeles Rivers Subregion
Gateway Water Management Authority (GWMA). GWMA is the Chair of the Lower SG & LA SC. GWMA formed a joint powers authority (JPA) in 2007 in response to the State's requirement to integrate regional watershed activities such as water supply, recycled water, stormwater, conservation measures, wastewater, etc. GWMA currently has 29 cities and water agencies responsible for coordinating the regional watershed needs of 2 million people in the Gateway Region located in Southeastern Los Angeles County.

Water Replenishment District of Southern California (WRD) WRD is the Vice-Chair of the Lower SG & LA SC. WRD manages groundwater for nearly four million residents in 43 cities of Southern Los Angeles County and is the official Groundwater Level Monitoring Entity for the Central Basin and West Coast Basin.

Watershed Conservation Authority (WCA). The WCA is the Vice-Chair of the Lower SG & LA SC. WCA is a joint powers entity between the San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy (RMC) and LACFCD whose focus is to provide multiple benefits such as open space, habitat restoration, and recreational opportunities in the San Gabriel and Lower Los Angeles Watersheds. c. 1.5 Stakeholder Involvement
i. Regional Stakeholder and Public Outreach (page 1-11) - Inserted new language describing the involvement of land use planning entities in information and collaboration activities with the Steering Committees.

Regional Stakeholder and Public Outreach
The majority of stakeholder input to the IRWMP is conducted at the Subregional level which is then reported to the LC through the Subregional representatives during a

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standing LC meeting agenda items called "Subregional Reports." Since Subregional SC meetings are held locally, they increase the ability and time allowed for individual stakeholder participation. Land Use planning entities are invited to SC meetings.

Information sharing and collaboration with regional land use planning entities as described in Section 2.11 takes place primarily through the steering committee meetings._ All GLAC stakeholders and general public are also invited to attend the monthly LC meetings and can speak during the public comment period. il. Table 1-1. Subregional Steering Committee Membership (page 1-14) - Revised to reflect current list of membership (attachment).
ili. Disadvantaged Community Involvement Program (page 1-19) - Inserted a new subsection and description for the Disadvantaged Community Involvement Program above the subsection on "Tribal Outreach."
Disadvantaged Community Involvement Program
In 2016, a Disadvantaged Community Involvement Program (DACIP) Task Force for the Los Angeles-Ventura Funding Area was established to facilitate a consensus-based approach to implement a Funding Area-wide DACIP that meets the objectives of the Proposition 1 DACIP IRWM Grant Program. All three IRWM Regions (GLAC, Upper Santa Clara River, and Watersheds Coalition of Ventura County) have identified the need for resources to support a more comprehensive assessment and education process as a critical step forward in further understanding the water management needs within their disadvantaged communities, economically distressed areas, and underrepresented communities (collectively referred to as DACs) including Native American tribes, migrant and resident farmworkers, and homeless people (Map 1-4, Los Angeles-Funding Area DACIP Disadvantaged Communities). Results and lessons learned from each Region's planning efforts over the past eight years have helped frame the Funding Area's water management needs and engagement strategies to assist in addressing those needs.

For the GLAC Region DAC Committee outreach surveys and workshops were conducted. While these showed a desire from the community for Outreach and Education,
Coordination, and Technical Assistance, these surveys and workshops also showed that there are missing resources needed to fully connect and involve the community in Funding of the DACIP to carry out local outreach, partnering, and local capacity building through technical assistance will ensure the opportunity for nvolvement in IRWM planning eftorts. of DACs including Native American tribes an omeless people. The results of the DACIP efforts will be fully described in a repor after its completion in early 2021.
iv. Tribal Outreach (pages 1-19 to 1-20) - Inserted new language to reference tribes as sovereign nations and as such the government-to-government coordination that takes place with them. The recent participation of the Mission Band of Gabrielino Indians and Tongva was also included.

Tribal Outreach
A specialized task was conducted as part of the Plan Update to determine tribal stakeholders and interests in the Region and then conduct outreach to these interests in an effort-to encourage participation in ongoing IRW activities including the Plan Update.

It should be noted that Tribes are sovereign nations, and as such coordination with Tribes is on a government-to-government basis.

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The GLAC Region contacted the Native American Heritage Commission (NAHC) to determine if the Region was home to any federally-recognized tribes or tribal interests.

The response from the NAHC indicated that the Region is not home to any current tribes or tribal lands but provided the contact name and intormation of several individuals listed as having tribal interests that reside within the GLAC Region. A letter was sent by the LC to each of the individuals on the listing to explain the IRWM Plan Update process, provide contact and Website information and encourage participation. Since then, the GLAC Mission Band of Gabrielino Indians and Tongva expressed interest in the GLAC IRWM process.
d. 1.8 Future Plan Updates or Amendments (page 1-25) - Inserted new language as a second paragraph and revised the third paragraph.

1.8 Future Plan Updates or Amendments
To incorporate other planning documents into the GLAC IRWMP, the Subregional Steering Committees will review and upon approval, recommend incorporation of these plans to the Leadership Committee. The Leadership Committee takes a vote to incorporate the plan. Planning documents that have been approved by the Leadership Committee through this process are included as appendices.

There are, however, on-going IRWM processes that are described in this Plan Update that could result in constant changes - such as new and modified Plan projects and prioritization and progress on Plan performance and meeting objectives and targets.

Because of the dynamic nature of these IRWM processes, this Plan Update documents the process used to allow for these changes. These project development and review processes and information on how to access current project listings and prioritizations are detailed in Chapter 5. The GLAC IRWM process for documenting plan performance and data management are included as part of Chapter 7. As part of the normal plan management activities, the benefits and impacts will be reviewed with each IRWM Plan Update.

Given the amount of resources and time necessary for full Plan updates (such as this 2013 Update) future updates will be dependent upon the need to meet changing DWR requirements and the funding available but will occur-no less frequent than every five yearsas often as necessary. Plan amendments to incorporate planning documents or additional information in response to new State IRWM Program Guidelines and eligibility requirements to qualify for funding would not automatically trigger re-adoption of the IRWMP.

2. CHAPTER 2 REGIONAL DESCRIPTION
a. 2.2 Overview
i. North Santa Monica Bay Subregion (page 2-4) - Revised to add relevant information regarding the Subregion.

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North Santa Monica Bay Subregion
The North SM Bay differs substantially from the other Subregions with respect to land use, water supply, groundwater and surface water quality, aquatic resources, open space and recreation. Over 85 percent of the North SM Bay is still undeveloped open space; remaining land uses in the area are primarily residential and concentrated along the coastline and interior valleys where its 107,000 residents reside. There is little heavy industry. The northern headwaters of the subegion are dominated by the geologic Modelo Formation that is part of the Monterey Formation, California's primary petroleum source rock, which is a known source of natural contaminants. As a result, Thethe North SM Bay depends almost entirely on imported water due to naturally-poor groundwater quality and low-yielding wells limited surface storage opportunities. Per capita recycled water use is among the highest in the nation, but further expansion is limited to areas that are difficult to reach due to steep mountain slopes. Aquatic habitat protection and restoration is a special priority, as the North SM Bay includes the Santa Monica Mountains National Recreation Area, several State Parks, a state designated ASBS, and Malibu Lagoon, all heavily used for recreation. The North SM Bay is also home to over a dozen endangered and threatened species, including the southernmost Steelhead Trout population in the state.
b. 2.7 Water Quality
i. Ground Water Quality (page 2-42 - 2-43) - Minor revision to the second paragraph.

The third paragraph was also revised to state that additional information regarding AB 1249 requirements are found in the subregional plans. The list of water quality issues in each of the Region's groundwater basins was also updated.

Groundwater Quality
Groundwater quality varies throughout the Region, based on naturally occurring conditions, historical land use patterns, and groundwater extraction patterns.

Naturally occurring soil and geologic conditions in the Region often result in elevated levels of dissolved solids in groundwater (measured in terms of TDS). Commonly referred to as "hard" water, these dissolved solids include inorganic salts (including calcium, magnesium, potassium, sodium bicarbonates, chlorides and sulfates) and small amounts of organic matter. Increases in groundwater TDS concentrations are a function of the recharge of storm and urban runoff, imported water, recycled water, and incidental recharge. Naturally hard water precludes the use of groundwater throughout one of the GLAC IRWMP Subregions, the North Santa Monica Bay Subregion. They are also attributed in part to the legacy of salt contamination from past agricultural and land uses, including fertilizer use and waste disposal.

Groundwater quality in some portions of the Region has been degraded by elevated levels of nitrates primarily from past agricultural land use practices and plumes of volatile organic compounds (VOCs) from the past disposal of industrial solvents. These include trichloroethylene (TCE), a common degreaser and cleaning product, perchloroethylene (PCE), commonly used in dry cleaning of clothing. In addition,

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perchlorate contamination, associated with the manufacturing and testing of solid rocket propellants, is another major concern. The solid salts of ammonium perchlorate, potassium perchlorate, or sodium perchlorate are soluble in water and can persist for decades. Groundwater contamination has also occurred in some locations from the use of methyl tertiary butyl ether (MTBE) a gasoline additive used to increase octane ratings and reduce emissions. Although the use of TBE was discontinued in 2003 (following the discovery of MTBE in groundwater wells in the City of Santa Monica), many underground gasoline storage tanks leaked and created the potential for contamination.

The location and extent of groundwater contamination in the Region, and the potential resulting impacts to the communities within the Region are described in the subregional plans. Groundwater cleanup efforts are being coordinated by various agencies and cities, including the San Gabriel Basin WQA and WRD.

The following is a summary of water quality issues in each of the Region's groundwater basins:
• Main San Gabriel Basin: VOCs, NDMA, nitrate, perchlorate, hexavalent chromium, and TDS
• Puente Basin: TDS, nitrate, hexavalent chromium, VOCs • Six Basins: nitrate, perchlorate, VOCs, arsenic, radon • Raymond Basin: TDS, nitrate, perchlorate, VOCs
• San Fernando Basin: TCE, PCE, hexavalent chromium, nitrate, sulfate, TDS • Verdugo Basin: MTBE, nitrate
• Sylmar Basin: nitrate
• Central Basin: TDS, VOCs, perchlorate, nitrate, iron, manganese, chromium, arsenic
• West Coast Basin: TDS, VOCs, manganese
• Santa Monica Basin: TCE, PCE, perchlorate, MTBE
• Hollywood Basin: TDS
c. 2.11 Land Use (page 2-56) - Revised to describe the role of local land use agencies and regional planning departments in "Land Use" IRWM planning efforts.

2.11 Land Use
Land Use within the Region is recognized as the responsibility of the cities and counties.

This reflects the historic pattern of urbanization, as most of the coastal plain and interior valleys are occupied with residential, industrial, commercial, and institutional uses, and most of the foothills and mountains are principally open space. _Increasingly, the local land use agencies and regional planning departments are collaborating with water purveyors to more effectively manage the Region's water demand and infrastructure with respect to climate change impacts. A breakdown of land use in the Region is provided in Table 2-6, and depicted on Maps 2-14(a) through 2-14(e).

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d. 2.14 Climate Change_(pages 2-67 through 2-71) - Revised to include additional information required for "Climate Change".

2.14 Climate Change (third paragraph)
On a state-wide level, these impacts are expected to impact local water resources as follows_(California Water Plan Update 2013, Volume II, South Coast Region, 2014; Safeguarding California: Reducing Climate Risk, 2014; DWR, 2011):

Effects of Climate Change on the GLAC Region (second paragraph) The need for and interest in more refined geographic and temporal scale climate change models has precipitated two recent climate change analysis efforts that were recently completed within the GLAC Region. These two studies inform the latest vulnerability assessments.

Climate Change in the Los Angeles Region: A modeling effort being led by UCLA for a partnership of the Los Angeles Regional Collaborative for Climate Action and Sustainability and the City of Los Angeles to refine climate modeling for the Greater Los Angeles area between 2041 to 2060. The results of the temperature and precipitation modeling have already been released and have been incorporated into the climate change effects described here. The modeling effort will also produce precipitation, hydrology, cloud cover, wind and sea level rise impacts - however the results of these analyses were not yet available for this section.

Los Angeles Basin Stormwater Conservation Study: A partnership between the US Bureau of Reclamation and the LACFCD to refine climate change projections influenced by localized geographic differences between coastal and inland areas, as well as changes in topography. The Los Angeles Basin Study assessed the Region's major water conservation and flood risk management infrastructure to prepare for future drivers that may impact water supply, such as changes to climate and population. The study is a long-range planning effort that evaluated the potential of existing facilities and additional new stormwater capture concepts to increase the resiliency and sustainability of local water supplies under an uncertain future. Resulting climate projections will be simulated in existing LACFCD facilities and hydrologic models to identify potential flooding and supply effects and vulnerabilities. Since the effort was begun in February 2013, the results were not yet available for use in this 2013 Plan Update:

Regional Climate Change Impacts
Climate change impacts and effects are based on different climate change assumptions and analysis approaches. Table 2-7 summarizes the impacts and effects of climate change on the GLAC Region by 2100 (unless otherwise indicated), which are typically based on an average of various climate change analyses. However only temperature projections are available at a refined scale for the GLAC Region as shown in Table 2.7.

Climate change is expected to increase average temperature by at least 3.5 degrees Fahrenheit by mid-century with the number of hot days (with temperatures greater than 95° F) tripling at the coast. This effect is further exacerbated in the inland areas.

Precipitation is expected to decrease by at 2 to 5 inches throughout the South Coast of

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California with the most extreme reductions taking place in the higher elevations. These temperature effects are presented in Figures 2-2 and 2-3 from the UCLA climate change modeling effort._Interestingly, climate change is projected to have minor impacts on average annual rainfall within the Region. Annual precipitation totals are anticipated to undergo little to no change. Rainfall intensity is projected to increase over the higher elevation portions of the Region while little change in intensity is expected over the central and coastal areas.

Recent sea level rise studies have estimated a range of 17-66 inch average 11 inch rise along coastal areas in Southern California by the year 2100. The Region uses a system of seawater barriers to prevent saltwater intrusion into the coastal groundwater aquifers and safeguard this water supply source. As sea level rises, the Region will need to be vigilant in the monitoring of its coastal aquifers and use adaptive management techniques as necessary to ensure the health of this supply.

The three major imported water supplies feeding the Region - State Water Project, Colorado River Aqueduct, and Los Angeles Aqueduct - are also anticipating delivery decreases as a result of climate change.
e. Table 2.7: Impacts and Effects of Climate Change on Region (page 2-69) - Revised to update information using the Los Angeles Basin Study Summary Report. See attachment.

Identification of Vulnerabilities (page 2-71)
The Climate Change Subcommittee conducted an exercise to answer vulnerability questions taken from Box 4-1 of the Climate Change Handbook and associated the answers with potential water management issues/vulnerabilities. See Appendix O for an updated summary of the analysis. Included in this analysis are qualitative vulnerability questions framed to help assess resource sensitivity to climate change and prioritization of climate change vulnerabilities within a region. Answers to vulnerability questions are given for the GLAC Region with local examples provided as justification for the answer.

Vulnerability issues are prioritized in the next section.

Prioritization of Vulnerabilities
The justification as to why the following vulnerability issues were classified as high priority is provided below:
• Decreased ability to meet and/or maintain conservation goals: There is concern that it will-may be very difficult for the Region to reachmaintain levels of conservation consistent with the state goal of a 20 percent reduction in per capita potable water use by 2020 and achieve the efficiency targets contemplated under the Governor's proposed framework for "Making Water Conservation a California Way of Life". In addition, demand hardening will reduce the water use efficiency options available to make further reductions in use beyond the current goal of 20 percent. Although conservation programs reduce the amount of water needed by customers, not all long-term conservation programs have not generated overall cost savings to those the customers. Water supply agencies must still maintain and operate supply facilities so decreased revenues as a result of conservation must be balanced through rate adjustments. Increased costs to customers could discourage them some_from continuing water conservation.

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3. CHAPTER 3 OBJECTIVES AND PRIORITIES
a. 3.2 Objectives: Improve Water Supply (pages 3-3) - Revised to include additional information required for "Climate Change".

Improve Water Supply
Optimize local water resources to reduce the Region's reliance on imported water Most years, the San Gabriel Mountains receive substantial rainfall and existing dams and natural storage slowly release runoff, providing an important source of high-quality and existing storage facilities, rehabilitation and enlargement of upstream storage capacity, and optimization of operational practices could improve the utilization of this local water source. Further, diversifying the water supply portfolio equips the Region to continually adapt to climate change.

The Region's concern about water shortages has increased the local interest in graywater reuse as a source of non-potable water supply. The California Plumbing Code was amended in August 2009 when Chapter 16A was adopted to allow the use of graywater from clothes washers without a permit from local government subject to some environmental protection conditions. Local governments are reviewing options for expanding the graywater reuse opportunities for more fixtures while addressing potential impacts on a case-by-case basis. Total graywater within a residence may account for as much as 60 percent of the total indoor water consumption. The LADWP estimates that the residential graywater reuse capacity may range from 50 to 165 million gallons per day.

Lastly, diversifying the water supply portfolio helps the Region to better adapt to climate change.
b. 3.2 Objectives: Reduce Flood Risk (page 3-5) - Revised to include additional information required for "Climate Change."
Reduce Flood Risk
Reduce flood risk in flood prone areas by either increasing protection or decreasing needs using integrated flood management approaches
Although, abundant sunshine is one of the Region's main attractions, occasional storm events have the potential to generate substantial amounts of runoff which can create significant flood risks. The Region's extensive flood management system must be operated, maintained, and enhanced where needed to protect lives and property.

Additionally, climate change is projected to create more intense storm events and in some cases, may warrant modifications to flood control infrastructure or expansions. As elements of the flood protection system warrant significant repair or replacement, consideration should be given to the implementation of more integrated flood management systems. Projects that propose to: 1) reduce runoff via onsite best

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management practices (BMPs); 2) capture and treat urban and storm water runoff for treatment; 3) expand groundwater recharge; or 4) restore habitat, must also preserve or enhance existing flood protection levels.
c. 3.2 Objectives: Address Climate Change (page 3-5) - Revised to include additional information required for "Climate Change."
Address Climate Change
Adapt to and mitigate against climate change vulnerabilities The potential effects, and impacts and vulnerabilities of climate change impacts were assessed in the context of the vulnerabilities of on the GLAC Region were assessed as part of the 2013 Plan Update and described in Chapter 2. In general, the Region can expect to have significant temperature increases, and little to no change in annual precipitation, and more intense storm events decreases (by 20102100) that will impact local water demands, supplies, water quality and habitat. The resulting runoff from these storm events is projected to have higher flows, yet the overall seasonality of the runoff is not expected to change much. Sea level rise and the more_intense storm events are alse expected to impact the Region causing flooding, water quality and other water management and land use issues. With the three major imported water supplies feeding the Region are also anticipating delivery decreases as a result of climate change, the Region recognizes that it must be ready to adapt to these impacts. d. 3.3 Planning Targets (page 3-7) - Revised to include additional information required for "Climate Change."
Increase capture and direct use of stormwater runoff by 26,000 AFY Stormwater runoff is a largely underutilized resource within the Region and seen as a key resource to help adapt to climate change. The Region's highly urbanized areas generate a large amount of runoff during winter storms that is only partially captured for direct use or to recharge local aquifers. However, this supply is very seasonal and so it is often infeasible to construct and operate facilities to store larger amounts of surface water supplies, so much of the winter storm flows are lost to the ocean. It is possible to capture urban runoff for direct use through the implementation of both small, decentralized projects as well as storage reservoirs.
e. 3.3 Planning Targets (page 3-12) - Revised to include additional information required for "Climate Change."
Implement mitigation strategies that decrease emissions of GHGs Decreasing the amount of energy required to produce water supply is one of the greatest ways that the Region can mitigate against further climate change impacts. By optimizing facilities and using less energy intensive water resource strategies to meet needs, the Region and its stakeholders can reduce GHG emissions and contribute to lessening the future climate impacts. The Region can also consider implementing green infrastructure projects that use natural solutions such as carbon sequestration and/or projects that use renewable energy to reduce GHG emissions. Additionally, Some "no regret" strategies, like water use efficiency, will directly reduce GHG emissions by not requiring water to be produced to meet the same need. The GLAC Region is supportive of strategies that both

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help adapt to mitigate against climate change, such as considering the strategies in CARB's A B 32 Scoping Plan. The strategies that can be used to meet these targets are provided in Chapter 4.

4. CHAPTER 4 REGIONAL WATER MANAGEMENT
a. 4.1 Introduction (page 4-1) - Revised to include reference to California Water Plan Update 2013 Resource Management Strategies.

4.1 Introduction
As part of the 2017 amendment process for the GLAC IRWM Plan, 2013 Plan Update process, the GLAG Region reviewed the management strategies called out in the 2006 Plan relative to the new IRWM Plan 2013the Plan objectives and the Resource Management Strategies (RMS) listed in the California Water Plan Update 20092013 (DWR, 20092013), including the new additions. The purpose of reviewing these Management Strategies in this context is to identify which ones will help achieve the Plan objectives through project or program implementation within the GLAC Region: In order to determine which strategies are suitable for the Region: _ Subregional SC meetings and a public review process were held to solicit feedback and input from the Region's stakeholders. Section 4.3 describes each of the Resource Management Strategies that the stakeholderswere determined were to be relevant to the GLAC Region. Those RMS's not discussed in Section 4.3 were considered not applicable. This chapter presents the strategies considered by the SC stakeholders for the 2013 Plan Update, and updatesamends the 2006 2013 Plan language accordingly. This chapter also specifically includes an evaluation of the adaptability of water management systems in the Region to climate change.
b. 4.2 California Water Plan Resource Management Strategies (page 4-1) - Revised to include reference to California Water Plan Update 2013 Resource Management Strategies

4.2 California Water Plan Resource Management Strategies Division 43;Proposition 1, -Chapter 27 Regional Water Security Climate and Drought Preparedness (California Water Code, Section 79740-79748)75206(a) of the California Water Code authorizes funding (pursuant to Proposition 84) to improve regional water self-reliance security and adapt to the effects on water supply arising out of climate change for long-term water needs of the state, and requires that eligible projects implement IRWM Plans that address the water management strategies identified within the California Water Plan Update 20092013:
c. Table 4-1 DWR California Water Plan Update 2013 Management Strategies (pages 4-2 through 4-3) - Revised Table 4-1 to reflect the California Water Plan Update 2013 Management Strategies, replacing the 2009 Management Strategies. See attachment. d. 4.3 2017 GLAC Region Water Management Strategies

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i. Stormwater Quality, Flood, and Sedimentation Management (pages 4-17 and 4-18) sedimentation
- Miger en biore and arar paragraphd inserted information on Stormwater Quality, and Flood, and Sedimentation Management (RMS # 15, 17, 19, 27, & 284, 16, 18, 20, & 27)
Packaue Natural
treatment plants treatment systems
Use stormwater
for landscape irrigation
Figuro 4-13. Stormwater currently lost to the ocean is a potential candidate for capture treatment, recharge, and reuse:

Package Natural treatment systems
treatment plants
Increase recharge of Use stormwater for
stormwater landscape irrigation
Use sediment materials
for beneficial uses
Figure 4-13. Stormwater currently lost to the ocean is a potential candidate for capture treatment, recharge, and reuse. Sediment materials currently captured which have beneficial uses can assist in reducing flood risks.

In recent years, new sediment management challenges have been identified. In particular, recent wildfires have led to an increased inflow of sediment and debris within flood management structures. This has put pressure on the remaining capacity of existing sediment placement sites. The Los Angeles County Flood Control District's Sediment Management Strategic Plan (SMS Plan) was developed to consider new alternatives that can reduce the environmental and social impacts of sediment management. The SMS Plan provides a balanced approach to ensure the flood management and water conservation system remains operational well into the future and able to provide flood control and water conservation purposes by proactively addressing key issues affecting sediment management.

Opportunities to enhance flood management include projects such as the Sun Valley Watershed Plan, which addresses an area of chronic flooding with alternative approaches

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to construction of a flood conveyance channel through the use ofusing gravel pits and underground drains below parkland to infiltrate runoff and thereby enhance groundwater recharge. If successful, the Sun Valley Plan can serve as a model for future localized flood management improvements. Flood attenuation to reduce peak flood flows, via expanded on-site infiltration and increased upstream storage, represents an opportunity to enhance the potential for river channel modifications, such as those proposed in the Los Angeles River Revitalization Master Plan.

Opportunities to facilitate sediment management alternatives for reservoirs and debris basins in the Region include a combination of removal, transportation, beneficial uses and placement. Sediment removal includes excavation, sluicing, dredging, and sediment flushing. Transport of sediment can be by way of conveyor belts, slurry pipes, and trucks.

Beneficial uses and placement include daily cover at solid waste landfills, fill at pits, or sediment placement sites.

The San Gabriel Reservoir Sedimentation Management Project is an example of a potential project using a combination of the above alternatives. The San Gabriel Reservoir has 23.8 MCY of sediment removal planned over the next 20 years and another 3.4 MCY that could potentially be sluiced or delivered by slurry pipeline from the upstream Cogswell Reservoir:
ii. Ecosystem Restoration RMS # 22,28_(page 4-20) - Deleted reference to CWP Update 2009 and inserted 2013 on the second paragraph.

Ecosystem Restoration (RMS # 22, 28)
In recent decades, technologies have emerged to restore function and productivity to degraded or destroyed ecosystems. Scientists, engineers, and community groups have begun working with federal, state, and local governments to restore ecosystem function to the Region's native ecosystems. According to the CWP UpdateDWR 20092013 (Ecosystem Restoration, Chapter 22), ecosystem restoration improves the condition of modified natural landscapes and biological communities to provide for their sustainability and for their use and enjoyment by current and future generations. Few, if any, of California's ecosystems can be fully restored to their condition before development. Instead, efforts must focus on rehabilitation of important elements of ecosystem structure and function. Successful restoration increases the diversity of native species and biological communities, and the abundance and connectivity of habitats.
ili. Open Space and Recreation (page 4-23) - Revised title from "Open Space, Recreation" to "Open Space and Water-Dependent Recreation and added new RMS #

31. Open Space, Recreation
Recreation and Public Access (RMS # 23, 24 24 & 26, 31) iv. Watershed Planning RMS #27 (page 4-28) - Deleted reference to CWP 2009 and replaced it with CWP 2013 in paragraph 4.
v. Outreach and Engagement RMS #29 (page 4-28) - Inserted description for new RMS.

Outreach and Engagement (RMS #29)

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The California Water Plan describes outreach and engagement for water management as the "use of tools and practices by water agencies to facilitate contributions by public individuals and groups toward good water management outcomes." Improved education, outreach and engagement has increased the public's awareness of critical water issues and their understanding of benefits, costs and impacts of water resources management alternatives leading to better engagement and contributing towards good water management.

The 2013 Plan Update includes several discussions within the Stakeholder Involvement section (1.5) which describes outreach and recruitment of stakeholders, the public, disadvantaged communities, local planning entities, and other IRWM Regions.

In 2013, DWR sponsored two local studies to evaluate and recommend strategies for future DAC engagement processes. Council for Watershed Health carried out the DAC Outreach Evaluation Study on effective outreach strategies to DACs within the Region, and the San Gabriel and Lower Los Angeles Rivers and Mountains Conservancy published the Alcanza Project, engaging disadvantaged communities in the planning process of developing projects. These efforts show that the most effective engagement strategies are based on highly localized efforts where "links" in the form of partnerships between water management agencies, municipalities, nonprofits, and community-based groups are supported, and that the community values outreach and education, project site assessment, project development, and technical assistance. The DACIP effort is intended to support collaborative work involving DACs, community-based organizations, and stakeholders in IRWM planning efforts, increase understanding, and where necessary, identify water arrangement needs of DACs, and develop strategies and long- term solutions that appropriately address the identified DAC water management needs.

Improve educational
outreach material design
Increase outreach
and tailor information to
targeted communities
Increase Expand and improve
partnerships among
engagement agencies, nonprofits, and
community-based groups
Figure 4-21. The Region is continually expanding and
improving its Outreach and Engagement activities.
vi. Water and Culture RMS #30 (page 4-28) - Inserted description for new RMS.

Water and Culture RMS # 30

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Reaching out across our cultural divides is one necessary factor to achieve successful water management planning. Thus, this RMS is included in the IRWM Plan based on the important principles it conveys to "link cultural considerations to water management." Although the RMS acknowledges it represents more of an annotated outline than a fully developed strategy and that is often difficult to define culture or cultural groups, the GLAC Region has actively incorporated practices and processes to be inclusive of all stakeholders. The GLAC Region is truly multi-cultural with a myriad of ethnicities, Native American tribes presence and practices, surfing and beach culture, and a strong environmental movement, to list a few.

The GLAC Region aims to increase involvement with the diverse communities in the Region through the DAC Involvement Program (DACIP). The DACIP began in 2017 and aims to increase engagement by underrepresented minorities, economically disadvantaged areas and tribal members. Through these efforts and others, the GLAC IRWM anticipates local communities will become more engaged in the collaborative process and in future water-related planning and projects. Furthermore, project sponsors are responsible for considering and outreaching to stakeholders within project specific boundaries.

Consider cultural values
Water and
and uses and its effects on
Culture
water management
Figure 4-22. The Region is continually expanding and
improving its Water and Culture activities.
vii. Climate Change (page 4-28) - Updated list of climate change related documents and inserted new text in the last paragraph.

4.4 Climate Change
The strategies discussed above can be used to help the Region adapt to the climate change vulnerabilities identified in Chapter 2, and mitigate further climate change impacts. The Climate Change Subcommittee reviewed the Resource Management Strategies discussed above, and also developed an initial list of both adaption and mitigation strategies through review of relevant climate change related documents.

These documents include:
• Managing an Uncertain Future (DWR, 2008)
• Climate Change Scoping Plan (CARB, 2006)
• Climate Action Team Biennial Report (CalEPA, 2010)
• Resolution on Sea Level Rise (OPC, 2010)
•_Coastal Regional Sediment Management Plan for Los Angeles County Coast (USACE, 2012)
• Los Angeles Basin Study (LACFCD/USBR, 2015)
• Regional Adapt LA: Coast Impacts Planning in the Los Angeles Region (USC, 2017)

GREATER LOS ANGELES COUNTY 2013 IRWM PLAN
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• Safeguarding California: Implementation Action Plans (CNRA, 2014) IRWM Plan projects that implement any of these climate change and/or GHG mitigation strategies would therefore be helping the Region meet the specific targets identified that support the objective.

CHAPTER 5 INTEGRATED REGIONAL PROJECTS
a. 5.2 Project Review and Selection _Process _(page 5-2) - Revised last bullet under "What types of projects are encouraged". to address new "Climate Change" requirements.
• Adapt to and mitigate against climate change vulnerabilities, and reduce energy consumption and overall GHG emissions
b. 5.5 Selecting Projects Integration (page 5-5) - Revised paragraph 3 to address new "Climate Change" requirements.

Finally, and perhaps most importantly, the Region wants to maintain flexibility to prioritize projects as needed, based on issues the Region is facing at the time, such as severe drought, flooding conditions, emerging climate change effects_or other unforeseen circumstances. Not prioritizing projects also gives the Region more flexibility to select projects for funding from various grant programs that may not be at/near the top of a prioritized list, but may be well supported by a deserving community.

For all these reasons, the Region's decision was to maintain a list of projects, but without prioritizing them. The process occurs at the direction of the LC and the most recent project selection is posted on the project database webpage. The general process and criteria to be used to determine the priority level of projects are provided in the box below. These could be superseded by specific grant criteria c. 5.3 Project Integration (page 5-6) - Revised first paragraph to address new "Climate Change: requirements

5.3 Project Integration
As DWR notes in the Guidelines, IRWM planning decisions can lead to existing or "off the shelf projects being combined or replaced by new and/ or different projects. Part of the advantage of regional planning is addressing similar objectives of local interests with a regional project. Resources of personnel, finance, and equipment to implement multiple smaller efforts may benefit from economies of scale when similar local interests can be met with a regional project. IRWM plans must contain provisions for reviewing project objectives and considering new, expanded, or even different solutions that meet multiple local needs. The decisions made in the IRWM Plan should consider the interconnected needs of the Region and not just the needs of specific entities in the RWMG. The RWMG should also consider integrating solutions that adapt to climate change and help to mitigate GHG emissions. Opportunities for project integration are regular topics of

GREATER LOS ANGELES COUNTY 2013 IRWM PLAN
2017 AMENDMENTS
discussion at GLAC Subregional SCs' monthly meetings and during quarterly project review workshops.
d. Table 5.3 Glace IRWMP Approved Projects as of August 2017 (pages 5-21 to 5-2) - Replaced with a list of approved projects as of August 2017. See attachment.

6. CHAPTER 7 PLAN IMPLEMENTATION
a. 7.5 Adaptive Management and Planning Needs (page 7-12) - Revised to provide additional information to address "Adaptive Management" requirement.

An adaptive management process will be used to analyze project and plan performance and identify the need for modification of projects and the need for additional Region planning through the GLAC IRWM Program.

Adaptive management and monitoring is critical to ensure that the IRWM Plan remains relevant and projects function properly in light of different stressors. The following strategies are especially helpful for adapting to and mitigating climate change. These are also useful for other emerging factors that require action as well.

7. LIST OF ACRONYMS - Attached is a revised list of acronyms.

8. APPENDIX I. LOWER SAN GABRIEL & LOWER LOS ANGELES RIVERS SUBREGIONAL PLAN - Attached are revised pages in compliance with providing information to address AB 1249 requirements.

9. APPENDIX J. NORTH SANTA MONICA BAY SUBREGIONAL PLAN - Attached is a revised page in compliance with providing information to address AB 1249 requirements.

10. APPENDIX K. SOUTH BAY SUBREGIONAL PLAN - Attached are revised pages and three maps in compliance with providing information to address AB 1249 requirements.

11. APPENDIX L. UPPER LOS ANGELES RIVER SUBREGIONAL PLAN - Attached are revised pages and three maps in compliance with providing information to address AB 1249 requirements.
12 APPENDIX M. UPPER SAN GABRIEL & RIO HONDO SUBREGIONAL PLAN - Attached is a revised page in compliance with providing information to address AB 1249 requirements.

13. APPENDIX O CLIMATE CHANGE VULNERABILITY EXERCISE

GREATER LOS ANGELES COUNTY 2013 IRWM PLAN
2017 AMENDMENTS
a. The description was revised to provide additional information to "Climate Change Vulnerability" requirements.

The GLAC IRWM Climate Change Subcommittee conducted an exercise to answer a vulnerability questionsassessment aligned with taken from Box 4-1 of the Climate Change Handbook and associated the answers withconcerning_potential water management issues/vulnerabilities. Table 1 summarizes the analysis and was updated based upon the latest local climate research within the Los Angeles Region. Qualitative vulnerability questions are framed to help assess resource sensitivity to climate change and prioritization prioritizeof climate change vulnerabilities within a Region. Answers to vulnerability questions are given for the GLAC Region with local examples provided as justification for the answer.
b. Table: 1 Region's "Climate Change Vulnerability Indicator Questions" - Minor revisions. See attachment.

14. Appendix P (New) - List of "Other Planning Documents" that have been incorporated by reference to the IRWM Plan, such as Gateway IRWM Plan, Stormwater Resources Plans, and others. See attachment._ Additional information specific to each planning document can be accessed at: http://www.ladpw.org/wmd/irwmp/index.cfm?fuseaction=swrp

IRW PLAN REVIEW FORM

INTRODUCTION
IRWM planning regions must have an IRWM Plan that has been reviewed and deemed consistent with the IRWM Plan Standards by DWR for eligibility to receiving Proposition 1 IRWM Implementation Grant funding. DWR will use this IRWM Plan Standards Review Form, which can be found at the link in Volume 1, Appendix A of the 2016 Guidelines and represented in Table 7 of the Guidelines, to ensure a consistent assessment of whether the 2016 IRWM Guidelines are being addressed in the IRWM Plan. The form contains a checklist for each of the 16 Plan Standards and narrative evaluations where required. The evaluation is pass/fail; there is no numeric scoring. Each Plan Standard is either sufficient or not, based on its associated requirements. Each Standard consists of between one and fifteen requirements. A Yes or No is automatically calculated in each Plan Standard header based on the individual requirement evaluations. In general, a passing score of "C" (i.e. 70% of the requirements for a given Plan Standard) is required for a Standard to pass. Standards with only one or 2 requirements will need one or both of those requirements to pass. Standards with 3 requirements will need at least 2 of the requirements to pass. Standards with 4 or 5 requirements will need at least 3 to pass. Some plan elements are legislated requirements. Such plan elements must be met in order to be considered consistent with plan standards. A summary of the sufficiency of each Standard is automatically calculated on the Standards Summary worksheet. A "No" evaluation indicates that a Standard was not met due to insufficient requirements comprising the Standard. The evaluation for each Plan Standard and any associated insufficiencies is summarized on the Standards Summary page. Additional reviewer comments may be added at the bottom of each standards work sheet.

Note: This review form is meant to be a tool used in conjunction with the 2016 IRWM Guidelines document to assist in the evaluation of IRWM plans. It is not designed to be a substitute for the Guidelines document itself. Reviewers must use the Guidelines in determining plan consistency.

DEFINITION OF TABLE HEADINGS
IRWM Plan Standard: As named in the 2016 IRWM Guidelines.

This field is either "YES" or "NO" and is automatically calculated based on the "Sufficient" column described below. If all fields Overall Standard Sufficient: are "y", the overall standard is deemed sufficient. Any entry other than a "y" in the Sufficient column (i.e. "n", ?, not sure, more detail needed, etc.) results in a NO.

Plan Standard Requirements Fields with a footnote (_) are required by legislation to be included in an IRWM Plan.

Which Must Be Addressed:

Requirement Requirements are taken directly from the 2016 IRWM Guidelines. 2016 IRWM Guidelines Source Page(s) Page(s) in the 2016 IRWM Guidelines which pertain to the Requirement and include the regulatory or other citations where applicable.
is the Guideline Requirement included in the IRWM Plan? The options are: y = yes, requirement is included in the IRWMP; or n Included = no, requirement is not included in the IRWMP. If only y or n then presence/absence of the requirement is sufficient for evaluation. If there is a "a" (qualitative) then add a brief narrative, similar to a Grant Application Review public evaluation or supporting information.

Evidence of Plan Sufficiency
Location of Standard in Grantee IRWM The page(s) or sections in the IRWM Plan where information on the Requirement can be found. This can be specific paragraphs Plan or entire chapters for more general requirements.

Supporting information for the Requirement if a "q" is in the Included column. This can be just a few sentences or a paragraph Brief Qualitative Evaluation Narrative and can be taken directly from the IRWM Plan. Comments or supporting information may be entered regardless of whether required.

Sufficient Is the Guidelines requirement sufficiently represented in the IRWM Plan (y/n).

IRWM Plan Review Form
IRWM Planning Region: Greater Los Angeles County
Regional Water Management Group: Greater Los Angeles County Leadership Committee IRWM Plan Title: The Greater Los Angeles County Integrated Regional Water DWR Reviewer:

RESULT: ONE OR MORE PLAN STANDARDS NOT SUFFICIENT
2012 One or More
IRWM Plan Standard Overall Standard Requirements)
Sufficient (yes/no) Insufficient
Governance
Region Description Yes
Objectives Yes
Resource Management Strategies Yes
Integration *
Project Review Process Yes
Impact and Benefit Yes
Plan Performance and Monitoring Yes
Data Management Yes
Finance Yes
Technical Analysis Yes
Relation to Local Water Planning Yes
Relation to Local Land Use Planning Yes
Stakeholder Involvement Yes
Coordination Yes
Climate Change Yes
* If not included as an individual section use Governance, Project Review Process, and Data Management Standards per 2016 Guidelines, p. 52.

Additional Comments:

IRWM Plan Standard: Governance Overall Standard Sufficient Requirement Included Evidence of Plan Sufficiency
y/n - Present/Not
IRWM 2016 Present in the IRWMP. If
From IRWM 2016 Guidelines Guidelines Location of Standard in Brief Qualitative Evaluation y/n
y/n/a, qualitative Grantee IRWM Plan
Page Number evaluation needed.

The name of the RWMG responsible for the development and implementation of the IRWMP. 37/38 y/n Chapter 1
A description of the IRWM governance structure including a discussion of whether or how Native American tribes will 37/38 y/n Chapter 1 Minor revision, updated the LC representation chart (Figure 1-2) participate in the RWMG. and added description for GWMA (p.1-6).

A description of how the chosen form of governance addresses and insures:

Minor revisions, updated Table 1-1. Subregional Steering Public outreach and involvement processes CommitteeMembership, and added a subsection on the 37 y/n/a
Disadvantaged Community Involvement Program (pages 1-11, 1- Chapter 1 14, and 1-17 through 1-19)
Effective decision making 37 У/n/q Chapter 1
Balanced access and opportunity for participation in the 37 y/n/a Chapter 1
IRWM process
Effective communication - both internal and external to the Chapter 1 (external 37 y/n/q
IRWM region comm: pg. 1-20 - 1-22)
Long term implementation of the IRWM Plan 37 y/n/a Chapter 1 Coordination with neighboring IRWM efforts and State and 37 y/n/q Chapter 1
federal agencies
The collaborative process(es) used to establish plan objectives Chapter 1 (pg. 1-11, 1-23, 38 y/n/a
1-24); Chapter 3
How interim changes and formal changes to the IRWM Plan will be performed 38 y/n/a Chapter 1
Added statement to clarify that amendments don't require Updating or amending the IRWM Plan 38 y/n/a Chapter 1 (pg. 1-25) readoption per the RWMG governance structure (Subsection 1.8, (page 1-25).

IRWM Plan Standard: Region Description Overall Standard Sufficient Requirement Included Evidence of Plan Sufficiency
IRWM 2016 y/n- Present/Not
Guidelines Present in the IRWM Location of Standard in
From IRWM 2016 Guidelines Plan. If y/n/a, qualitative Brief Qualitative Evaluation y/n Page Number Grantee IRWM Plan
evaluation needed.

Chapter 3 (pg. 3-2);
If applicable, describe and explain how the plan will help 38 y/n Chapter 4 (pg. 4-13); reduce dependence on the Delta supply regionally. Chapter 6 (Pg. 6-3 through 6-5)
Chapter 2(2.5)
Describe watersheds and water systems 38 у/п Appendicies 1/J/K/L/M (Subregional IRWMPs)
Describe internal boundaries Chapter 2(2.4)
Chapter 2(2.6); App. E;
Describe water supplies and demands for minimum 20 year planning horizon 38 y/n App. N (demand
projections)
Describe water quality conditions. If the IRWM region has areas of nitrate, arsenic, perchlorate, or hexavalent chromium contamination, the Plan must include a description of Minor changes on Subsections 22 and 2.7 and Subregional Chapter 2(2.7); page 35 Plans were updated to include additional information prescribed location, extent, and impacts of the contamination; actions 38 y/n & Appendix F by AB 1249. (pages 2-4, 2-42, 2-43, and Apendices I through M). undertaken to address the contamination, and a description of any additional actions needed to address the
Describe social and cultural makeup,including specific
information on DACs and tribal communities in the region and 38 y/n/a Minor revisions on tribal information (pages 1-18 and 1-19). their water challenges.

Chapter 2(2.2); Chapter 3
Describe major water related objectives and conflicts (1). y/n/a (3.3) Explain how IRWM regional boundary was determined and Chapter 2 (pg. 2-1, 2-2) why region is an appropriate area for IRWM planning. 38 у/п/q Chapter 1; Chapter 2 (pg.

Describe neighboring and/or overlapping IRWM efforts y/n 2-5) Explain how opportunities are maximized (eg. people at the table, natural features, infrastructure) for integration of water y/n Chapter 1(1.4, 1.5) management activities
Revised Subsection 2.14 on Climate Change, Table 2-7. Impacts Describe likely Climate Change impacts on their region as 38/39 y/n Chapter 2 (Pgs. 2-67-71); and Effects of Climate Change on Region, and Appendix O (pages determined from the vulnerability assessment. Appendix O 2-67 through 2-71 and Appendix O).

IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CWC 510541 (e)(3). (2) Requirement must be addressed per CWC 910541 (e)(14).

IRWM Plan Standard: Plan Objectives Overall Standard Sufficient Requirement Included Evidence of Plan Sufficiency
IRWM 2016 y/n- Present/Not
From IRWM 2016 Guidelines Guidelines Present in the IRWM Location of Standard in Brief Qualitative Evaluation y/n
Page Number Plan. If y/n/q, qualitative Grantee IRWM Plan evaluation needed.

Through the objectives or other areas of the plan, the 7 items on pg 49 of GLare addressed (1). 38-39/48-50 y/n Chapter 3 Describe the collaborative process and tools used to establish objectives:
- How the objectives were developed
- What information was considered (i.e.,
water management or local land use 48-50 y/n pg. 1-11, 1-22, 1-23, and 1- plans, etc.) 24. Chapter 3(3.2)
- What groups were involved in the process
- How the final decision was made and
accepted by the IRWM effort
Identify quantitative or qualitative metrics and measureable objectives:

Objectives must be measurable - there must be some metric 49 y/n/9 Chapter 3(3.2, 3.3) the IRWM region can use to determine if the objective is being met as the IRWM Plan is implemented. Neither quantitative nor qualitative metrics are considered inherently better (2).

Explain how objectives are prioritized or reason why the 50 y/n/a Chapter 3 objectives are not prioritized
Reference specific overall goals for the region:

RWMGs may choose to use goals as an additional layer for 50 y/n Chapter 3
organizing and prioritizing objectives, or they may choose to not use the term at all.

Address adapting to changes in the amount, intensity, timing, Chapter 3 (pages 3-3, 3-5, quality and variability of runoff and recharge. 39
3-7and 3-12). Minor revisions (pages 3-3, 3-5, 3-7, and 3-12) Consider the effects of sea level rise (SLR) on water supply 39 y/n conditions and identify suitable adaptation measures.

Reducing energy consumption, especially the energy
embedded in water use, and ultimately reducing GHG 39 y/n emissions.

In evaluating different ways to meet IRWM plan objectives, where practical, consider the strategies adopted by CARB in its 39 AB 32 Scoping Plan1.

Consider options for carbon sequestration and using
renewable energy where such options are integrally tied to 39 y/n supporting IRWM Plan objectives
IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CWC 910540 (c).
(2) Requirement must be addressed per CWC §10541 (e).

IRWM Plan Standard: Resource Management Strategies (RMS) Overall Standard Sufficient Requirement Included Evidence of Plan Sufficiency
y/n - Present/Not
IRWM 2016 Present in the IRWM Location of Standard in
From IRWM 2016 Guidelines Guidelines Grantee IRWM Plan Brief Qualitative Evaluation y/n Page Number Plan. If y/n/a, qualitative
evaluation needed.

Identify RMS incorporated in the IRWM Plan: Chapter 4 (pages 4-1, 4- Consider all California Water Plan (CWP)RMS criteria (29) 39 y/n 17, 4-18,4-20, 4-23, and 4-Revised Table 4-1 to reflect CP Update2013 and added new listed in Table 3 from the CWP Update 2013 RMSs (pages 4-1, 4-17, 4-18,4-20, 4-23, and 4-28).

Consideration of climate change effects on the IRWM region must be factored into RMS. Identify and implement, using vulnerability assessments and tools such as those provided in the Climate Change Handbook, RMS and adaptation strategies that address region-specific climate change impacts.
• Demonstrate how the effects of climate change on its region are factored into its RMS. Chapter 4 (4.4); Table 4.3,
39 y/n Updated climate change related documents (pages 4-28). •Reducing energy consumption, especially the energy Pg 28-30 embedded in water use, and ultimately reducing GHG
emissions.
• An evaluation of RMS and other adaptation strategies and ability of such strategies to eliminate or minimize those vulnerabilities, especially those impacting water infrastructure systems (2).

Address which RMS will be implemented in achieving IRWM Sedimentation Management, Outreach and Engagement, Water Plan Objectives (1). y/n Chapter 4 pages 4-17, 18, and Culture. Outreach and Engagement is fully described as well | in Chapter 1, Stakeholder Involvement.

IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRW Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CWC 910540 (e)(1). (2) Requirement must be addressed per CWC $10540 (e)(10).

IRWM Plan Standard:Integration Overall Standard Sufficient Requirement Included Evidence of Plan Sufficiency
IRWM 2016 y/n- Present/Not
Present in the IRWM Location of Standard in
From IRWM 2016 Guidelines Guidelines Grantee IRWM Plan Brief Qualitative Evaluation y/n Page Number Plan. If y/n/a, qualitative
evaluation needed.

Contains structure and processes for developing and fostering integration:
- Stakeholder/institutional 39 y/n/a Chapter 1, Chapter 5 - Resource
- Project implementation

1. If not included as an individual section use Governance, Project Review Process, and Data Management Standards per 2016 IRWM Guidelines, p. 52.

IRWM Plan Standard: Project Review Process Overall Standard Sufficient Requirement Included Evidence of Plan Sufficiency
IRWM 2016 y/n- Present/Not
Present in the IRWM Location of Standard in
From IRWM 2016 Guidelines Guidelines Brief Qualitative Evaluation y/n Page Number Plan. If y/n/q, qualitative Grantee IRWM Plan evaluation needed.

Process for projects included in IRWM plan must address 3 components:
-procedures for submitting projects
39-40 Chapter 5(5.2)
-procedures for reviewing projects
- procedures for communicating lists of selected projects Does the project review process in the plan incorporate the following factors:

How a project contributes to plan objectives 40 y/n Chapter 5(5.2) How a project is related to Resource Management Strategies identified in the y/n 40 Chapter 5(5.2)
plan.
y/n Chapter 5(5.2) Appendix
40 The technical feasibility of a project. B. Page 3
Chapter 1; Chapter 5(5.2),
40 y/n (5.4)
A rover specie benet to c water sue. 40 y/n Chapter 5(5.2) Project costs and financing 40 y/n Chapter 5(5.2)
Address economic feasibility 40 y/n Chapter 5
Project status 40 y/n Chapter 5 (5.2)
Strategic implementation of plan and project merit 40 y/n Chapter 5 Project's contribution to chlimate change adaptation Chapter 5(5.2) Contribution of project in reducing GHGs compared to project alternatives. •Consider the contribution of the project in reducing GHG emissions as compared to project alternatives
• Consider a project's ability to help the IRWM region reduce GHG emissions as 40 y/n Chapter 5(5.2) Minor revisions to Subsection 5.2. new projects are implemented over the 20-year planning horizon. •Reducing energy consumption, especially the energy embedded in water use, and ultimately reducing GHG emissions.

Status of the Project Proponent's IRWM plan adoption 40 y/n Chapter 5(5.2) Project's contribution to reducing dependence on Delta supply (for IRWM regions 40 y/n Chapter 5
receiving water from the Delta).

Project's contribution to climate change adaptation.
• Include potential effects of Climate Change on the region and consider if adaptations to the water management system are necessary (1). •Consider the contribution of the project to adapting to identified system vulnerabilities to climate change effects on the region. 40 y/n Chapter 2(2.14); Chapter 4 Minor revisions to Subsections 2.14, 4.4, and 5.2. (4.4) and Chapter 5(5.2)
•Consider changes in the amount, intensity, timing, quality and variability of runoff and recharge.
•Consider the effects of SLR on water supply conditions and identify suitable adaptation measures.
y/n Chapter 5(52); Appendix
53 B (p. 3, criteria #5)
Specific benefits to critical water issues for Native American tribal communities.

IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CWC §10540 (e)(10).

IRM Plan Standard: Impact and Benefit Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n- Present/Not
Present in the IRWM
IRWM 2016 Guidelines Requirement Guidelines Brief Qualitative Evaluation y/n Page Number Plan. If y/n/a, qualitative
evaluation needed.

Discuss potential impacts and benefits of plan implementation Chapter 6; (see Tables 6- within IRWM region, between regions, with DAC/EJ concerns 40 y/n 1 through 6-5)
and Native American Tribal communities
State when a more detailed project-specific impact and benefit 55 y/n Chapter 6 analysis will occur (prior to any implementation activity) Review and update the impacts and benefits section of the 55-56 y/n Chapter 6(6.2) plan as part of the normal plan management activities
IRWM Plan Standard: Plan Performance and Monitoring Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n- Present/Not
Present in the IRW Location of Standard in
IRWM 2016 Guidelines Requirement Guidelines Brief Qualitative Evaluation y/n Page Number Plan. If y/n/a, qualitative Grantee IRWM Plan evaluation needed.

Contain performance measures and monitoring methods to
40 y/n Chapter 7(7.3)
ensure that IRWM objectives are met (1).

Can in methodinen that the prie will use to verse 40 y/n Chapter 7(7.3) Chapter7 (7.3, p. 7-3; 7.5,
p. 7-12) Chapter 1
40 y/n (1.8, p. 1-25) Minor revisions.
manifest, new tools are developed, and new information Chapter 2(2.14; pp. 2-67 becomes available, adjust IRWM plans accordingly. through 2-71)) IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CWC §10541 (e)(7)- IRWM Plan Standard: Data Management Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n- Present/Not
IRWM 2016 Guidelines Requirement Present in the IRWM Location of Standard in Guidelines Plan. If y/n/a, qualitative Grantee IRWM Plan Brief Qualitative Evaluation y/n Page Number evaluation needed.

Describe data needs within the IRWM region 59-60 y/n Chapter 7(7.4) Describe typical data collection techniques 59-60 Y/n Chapter 7(7.4) Describe stakeholder contributions of data to a data
management system 59-60 y/n Chapter 7(7.4)
Describe the entity responsible for maintaining data in the 59-60 y/n data management system Chapter 7(7.4)
Describe the QA/QC measures for data 59-60 y/n Chapter 7(7.4) Explain how data collected will be transferred or shared between members of the RWMG and other interested parties throughout the IRWM region, including local, State, and 59-60 y/n Chapter 7(7.4) federal agencies (1).

Explain how the Data Management System supports the
RWMG's efforts to share collected data 59-60 y/n Chapter 7(7.4) Outline how data saved in the data management system will be distributed and remain compatible with State databases including CEDEN, Water Data Library (WDL), CASGEM, 59-60 California Environmental Information Catalog (CEIC), and the y/n Chapter 7(7.4) California Environmental Resources Evaluation System
[(CERES).
(1) Requirement must be addressed per CW 910541 (e)(12).

IRWM Plan Standard: Finance Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n - Present/Not
Present in the IRWM Location of Standard in
IRWM 2016 Guidelines Requirement Guidelines Brief Qualitative Evaluation Plan. If y/n/a, qualitative Grantee IRWM Plan
Page Number
evaluation needed.

Include programmatic level (i.e. general) plan for
Implementation aunt i ancinor identied projects and 41 y/n Chapter 7(7.6); Table 7-4 List known, as well as, possible funding sources, programs, and grant opportunities for the development and ongoing 41 y/n Chapter 7(76) funding of the IRWM Plan.

List the funding mechanisms, including water enterprise funds, rate structures, and private financing options, for 41 y/n Chapter 7(7.6) projects that implement the IRWM Plan.

An explanation of the certainty and longevity of known or potential funding for the IRWM Plan and projects that 41 y/n Chapter 7(7.6) implement the Plan.

An explanation of how operation and maintenance (0&M)
costs for projects that implement the IRWM Plan would be 41 y/n Chapter 7(7.6)
covered and the certainty of operation and maintenance
funding.
(1) Requirement must be addressed per CWC §10541 (e)(8).

IRWM Plan Standard: Technical Analysis Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n- Present/Not
Guidelines Present in the IRWM Location of Standard in
IRWM 2016 Guidelines Requirement Brief Qualitative Evaluation y/n Plan. It y/n/g, qualitative Grantee IRWM Plan
Page Number
evaluation needed.

Document the data and technical analyses that were used in the development of the plan (1). y/n Chapter 1 (1.7; 1.9) (1) Requirement must be addressed per CWC 510541 (e)(11).

IRWM Plan Standard: Relation to Local Water Planning Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n- Present/Not
Guidelines Present in the IRWM
Location of Standard in
IRWM 2016 Guidelines Requirement Plan. If y/n/a, Brief Qualitative Evaluation y/n Page Grantee IRWM Plan
Number qualitative evaluation
needed.

Identify a list of local water plans used in the IRWM plan 41 y/n Chapter 1 (table 1-3) Describe the dynamics between the IRWM plan and other 41 y/n Chapter 1 (pg. 1-23)
planning documents
Describe how the RWMG will coordinate its water mgmt
41 y/n Chapter 1
planning activities
Discuss how the plan relates to these other planning
documents and programs. Same as 2012 GL with the
following addition: "It should be noted that Water Code S 10562 (b)(7) requires the development of a stormwater
resource plan and compliance with these provisions to Revised subsection 1.8 that describes the process of receive grants for stormwater and dry weather runoff Chapter 1 (p. 1-25); incorporating other planning documents such as the capture projects. Upon development of the stormwater 63-64 y/n Stormwater Resource Plans. Added Appendix P, Other Appendix P
resource plan, the RWMG shall incorporate it into IRWM Planning Documents. plan. The IRWM Plan should discuss the processes that it will use to incorporate such plans." Minor wording differences - e.g. Groundwater Sustainability Plan example in the 2016 Guidelines instead of Groundwater Management Plan in
the 2012 Guidelines.

Consider and incorporate water management issues and Minor revisions on Subsection 2.14 and Appendix O. climate change adaptation and mitigation strategies from 63-64 v/n Chapter 2 (page 67-69); local plans into the IRWM Plan. Appendix O
IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.

IRWM Plan Standard: Relation to Local Land Use Planning Yes Requirement Included Sufficient
IRWM 2016 Location of Standard in
IRWM 2016 Guidelines Requirement Guidelines Brief Qualitative Evaluation y/n Page Number Plan. If y/n/a, qualitative Grantee IRWM Plan evaluation needed.

Chapter 2 (pg. 2-41, 2-48,
Document current relationship between local land use and series of land use 41 y/n
planning, regional water issues, and water management maps provided, beginon objectives pg. 2-57), 2.11 (pg. 2-56)
Document future plans to further a collaborative, proactive 41 y/n Chapter 2 relationship between land use planners and water managers Demonstrate information sharing and collaboration with
regional land use planning in order to manage multiple water demands throughout the state, adapt water management 41 y/n Chapter 2 (2.11, p. 2-56) Minor revisions. systems to climate change, and potentially offset climate change impacts to water supply in California.

IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.

IRWM Plan Standard: Stakeholder Involvement Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n- Present/Not
Guidelines Present in the IRWM Location of Standard in
IRWM 2016 Guidelines Requirement Plan. If y/n/a, qualitative Grantee IRWM Plan Brief Qualitative Evaluation y/n Page Number evaluation needed.

Discuss involvement of DACs and tribal communities in the y/n Chapter 1 (pg. 1-16 to 1- IRWM planning effort 41-42 19; 1-20)
Describe decision-making process and roles that stakeholders can occupy 41-42 chapter 1
Discuss how stakeholders are necessary to address objectives 41-42 and RMS Chapter 1 ( pg. 1-23)
Discuss how a collaborative process will engage a balance in 41-42 y/n interest groups chapter 1
Contain a public process that provides outreach and Added description of the "Disadvantaged Community opportunity to participate in the IRWM plan (1). Per 2016 GL: 1 Involvement Program" that includes Native American Tribes 41-42 Chapter 1 (pp. 1-19,
"Native American tribes - It should be noted that tribes are y/n 20); DALS map and a map of DACs. Minor revision to the "Tribal Outreach" sovereign nations, and as such coordination with tribes is on a description. government-to-government basis."
Identify process to involve and facilitate stakeholders during development and implementation of IRWM plan regardless of ability to pay; include description of any barriers to Added language that Tribes are sovereign nations, and as such involvement (2). "Stakeholder Involvement" in the 2012 GL is 41-42 y/n Chapter 1 (pp.1-19, 1-20) coordination with Tribes is on a govenrment-to-government referred to "Native American Tribe and Stakeholder
Involvement" in the 2016 GL and Tribes are referred to
specifically.

IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 IRWM Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CWC 910541 (g).
(2) Requirement must be addressed per CWC 510541 (h)(2).

IRM Plan Standard: Coordination Yes
Requirement Included Evidence or an surina suicient Sufficient IRWM 2016 y/n- Present/Not
IRWM 2016 Guidelines Requirement Guidelines Present in the IRWM Location of Standard in Plan. If y/n/q, qualitative Grantee IRWM Plan Brief Qualitative Evaluation Page Number evaluation needed.

Identify the process to coordinate water management
projects and activities of participating local agencies and Chapter 1; Chapter 2 (Pg. stakeholders to avoid conflicts and take advantage of 42 y/n 2-5) efficiencies (1).

Identify neighboring IRWM efforts and ways to cooperate or Chapter 1; Chapter 2 (Pg. coordinate, and a discussion of any ongoing water 42 y/n 2-5); Chapter 5 (pg. 5-8 to management conflicts with adjacent IRWM efforts 5-19)
Identify areas where a state agency or other agencies may be able to assist in communication or cooperation, or
implementation of IRWM Plan components, processes, and 42 Chapter 1; Chapter 2 projects, or where State or federal regulatory decisions are required before implementing the projects.
(1) Requirement must be addressed per CWC 510541 (e)(13).

IRWM Plan Standard: Climate Change Overall Standard Sufficient Yes Requirement Included Evidence of Plan Sufficiency Sufficient IRWM 2016 y/n - Present/Not
Present in the IRWM Location of Standard in
IRWM 2016 Guidelines Requirement Guidelines Brief Qualitative Evaluation y/n Plan. If y/n/a, qualitative Grantee IRWM Plan
Page Number evaluation needed.

Contain a plan, program, or methodology for further data Page 3-6, 3.3 Planning 42-44 y/n
gathering and analysis of prioritized vulnerabilities. Targets Include climate change as part of the project review process. 42-44 y/n Chapter 5 Evaluate IRWM region's vulnerabilities to climate change and potential adaptation responses based on vulnerabilities assessment in the DWR Climate Change Handbook for
Regional Water Planning (1). Addition in 2016 GL - "At a Minor revisions 42-44 y/n Appendix O
minimum, the vulnerability evaluation must be equivalent to the vulnerability assessment contained in the Climate Change Handbook for Regional Water Planning, Section 4 and
Appendix B."
Provide a process that considers GHG emissions when
choosing between project alternatives (1). Addition in 2016 GL "At a minimum, that process must determine a project s Chapter 2 (pp. 2-67 ability to help the IRWM region reduce GH emissions as new 42-44 y/n through 2-71; Chapter 5 Minor revisions projects are implemented over a 20-year planning horizon and (pg. 5-2, 5-3, 5-5, 5-6) consider energy efficiency and reduction of GHG emissions when choosing between project alternatives."
Include a list of prioritized vulnerabilities based on the vulnerability assessment and the IRWM's decision making process. Addition in 2016 GL - "A list of prioritized Chapter 2 (Pp. 2-71 and 2 Minor revisions 42-44 y/n
vulnerabilities which includes a determination regarding the 72), Table 2-8 feasibility for the RWMG to address the priority
vulnerabilities."
Address adapting to changes in the amount, intensity, timing, Chapter 2 (pp. 2-67 42-44 y/n through 2-73)) Minor revisions
quality, and variability of runoff and recharge.

Areas of the State that receive water imported from the Sacramento-San Joaquin River Delta, the area within the Delta, and areas served by coastal aquifers must also consider 42-44 y/n the effects of sea level rise (SLR) on water supply conditions Chapter 2 (pp. 2-67
and identify suitable adaptation measures.
through 2-73))
IRWM Plan Standard Requirements for 2016 IRWM Guidelines in Addition to Previously Required 2012 Guideline Requirements. See Appendix H in IRWM 2016 Guidelines.
(1) Requirement must be addressed per CW 910541 (e)(11).

Greater Los Angeles County Integrated Regional Water Management Plan Chair
Los Angeles
County Flood
Control District
Subregional Representation
Lower San Gabriel North Santa South Bay Upper Los Upper San and Monica Bay Angeles River Gabriel River
Los Angeles Rivers and Rio Hondo
Gateway Water Las Virgenes West Basin Los Angeles Dept. of Main San Management Municipal Water Municipal Water and Power Gabriel Basin Authority District Water District Watermaster
Council for San Gabriel
Water City of Malibu City of Torrance Watershed Health
Basin Quality
Replenishment
District of Southern Authority
California
Water Management Focus Area Representation
Groundwater Open Space Sanitation Stormwater Surface Water Los Angeles City Metropolitan
Raymond Basin Santa Monica Sanitation
Watershed Water District
Watermaster Bay Restoration Districts of Los
Protection Division Of Southern
Commission Angeles County
California
Figure 1-2. Leadership Committee Representation. The Leadership Committee consists of representatives from each Steering Committee and each Water Management Area.
1-6 Governance and Participation

Table 1-1. Subregional Steering Committee Members
1-14
Lower San Gabriel and
North Santa Monica Bay South Bay Upper Los Angeles River Upper San Gabriel and Los Angeles Rivers Rio Hondo Rivers
• California Coastal Conservancy • Califomia Department of • City of Los Angeles Bureau of • Arroyo Seco Foundation • City of La Verne • Central Basin Municipal Water Transportation Sanitation • Burbank Water and Power • City of Monrovia District • City of Torrance • City of Calabasas • City of Arcadia • Council for Watershed Health • City of Agoura Hills
• Heal the Bay • City of Los Angeles Department of • Council for Watershed Health • Los Angeles County Department • City of Calabasas
• Los Angeles County Flood Control Water and Power • County Sanitation Districts of Governance and Participation of Public Works • City of Malibu District • City of Los Angeles Department of Los Angeles County
• Orange County Resources and • City of Westlake Village Recreation & Parks • Los Angeles County Flood • Los Angeles County Flood Control • Los Angeles Department of Water a Development Management Power • City of Los Angeles Department of Control District Department District
• County Sanitation Districts of Los Public Works, Bureau of Sanitation • Main San Gabriel Basin • County Sanitation Districts of Los • Las Virgenes Municipal Water Angeles County • City of Pasadena Watermaster District
Angeles County • Santa Monica Bay Restoration • City of South Pasadena • Raymond Basin • Water Replenishment District • Los Angeles County Board of Commission • Council District 9 Management Board
Supervisors. 3rd District
• Watershed Conservation Authority • South Bay Cities COG • Council for Watershed Health • Rivers and Mountains Greater Los Angeles County Integrated Regional Water Management Plan • Malibou Lake Mountain Club
• Gateway Water Management • Water Replenishment District • Foothill Municipal Water District Conservancy Authority • Mountains Restoration Trust • San Gabriel Basin • Resource Conservation District of • West Basin Municipal Water • Glendale Water and Power • From Lot to Spot District • Los Angeles County Flood Control Water Quality the Santa Monica Mountains • Westside Cities COG
District Authority
• Water District # 29 Los Angeles • Metropolitan Water District of • San Gabriel Mountains County Department of Public Works Non-Voting Members
• Los Angeles County Beaches and Southern California Regional Conservancy • West Basin Municipal Water •Mountains Recreation and • San Gabriel Valley Municipal District Harbors
Conservation Authority Water District
• Westlake Lake Management • Los Angeles Regional Water • San Gabriel Valley Water Quality Control Board • Tree People
Association Association
• Tujunga Watershed Area
Non-Voting Members • The River Project • Three Valleys Municipal • Califomnia Department of Parks • Pacoima Beautiful Water District and Recreation • Upper San Gabriel Valley
• Los Angeles County Beaches & Municipal Water District Harbors
• Los Angeles County Regional Non-Voting Members
Planning • Califomia Department of
Water Resources
• National Park Service-Santa • Los Angeles County
Monica Mountains NRA
Department of Public
• Santa Monica Bay Restoration Works
Commission
• Santa Monica Baykeeper
• Santa Monica Mountains
Conservancy
• Triunfo Sanitation District

DESIGNATED DISADVANTAGED COMMUNITIES WITHIN
Prop1 Los Angeles-Ventura THE PROP 1 LOS ANGELES-VENTURA FUNDING AREA Funding Area
Integrated Regional Water 1. Adams/Central 53 - Mid-City West Management (IRWM) Areas 2 - Arlington/Harvard Heights 64 - North Lynwood 3 - Arts Districe/West Boyle Herghts 65 - Northest Pasadena IRWM Subregions/ 4 - Atwater Village

6. North loan Rear
Subwatersheds 5 - Arusa/Citrus
67 - Northern Lower LAR Cities
WCVC/ USCR Designated 6-Bellflower/Southeast Downey 68 - Northern Tarzana DAC Priority Activity Areas 7 - Boyle Heights 69 - Northwest Glassell Park 8 - CalPoly Pornona 70 - Northwest Norwalk
GLAC DAC Outreach 9 - Canoga Corridor 71 • Outer Expo Park Study Communities 10 - Central Burbank 72 - Pacoima
11 - Central Glendalo 73 - Palms
12 - Central Huntington Park 74. Panorama City
DWR DAC Designation 13 - Central Long Beach 15 _ Paramount

4. Central Pamons 76 - Pico Union
Santa Clara River UPPER SANTA
Watershed Underrepresented 15 - Central Reseda/S, Northridge 17 - Rowland/Industry CLARA RIVER Communities 4. Contral San Pader 78 - San Fernando -IRWM 17 - Central South Gate 79 - Santa Monica I-10 Cordor 1B - Central Whittier 80 - Sawtelle
WATERSHEDS COALITION 19 - Central Winetka 81 - Silverlake Ventura River
OF VENTURA COUNTY 82 - South Boyle Heights
IRWM 1,700 21 - City Terrace 83 - South Central
22 - Commerce/Bell Gardens 94 - S. Harbor Gateway/West Carson

23. County Hospital 35 - South Park/Fashion/Lofts District 24 . Crenshaw/Baldwın Hills 86 - South Puente Valley
25 - CSULA and Neighborhood 87 - Sun Valley East
26 - Cypress/Glassell Park 88 - Sun Valley South
Los Angoles 27 - Elst Central Long Beach 89 - Southwest Mar Vista 28 - Eist Dal Res 90 - Sylmar/Foothill Bivd Comm
29 - Eust Hollywood 21 - Tujunga/Foothill Bivd
30 - Eist LA/Montebella/Pico Rivera 92 - Valley Glen Valley Village Calleguas Creek GREATER LOS ANGELES 31 - Eistern West Hollywood 93 - Van Nuys Watershed 32 - El Sereno 94 - Van Nuys Airport
COUNTY 33 - Elysan Park
Upper San Gabriel 95 - Vermont Knolls
RWM 34 . Elysian Valley/Frogtown 6- Vermont Square
and Rio Hondo Divere
35 - Florence Firestone 97 - Watte Prone
a La 36 - Gardena/N. Harbor Gateway 8- Watte Wer
37 - Glen-Bank 99 - West Adame/Jefferson Park
38 - Goodyear/Nan Mater Springs 100 . Wost Land Beach

39. Gover Athens 101 - West SGV 10 Freeway

10. Gester Balden Part 102 - Western South Whittier
41 - Grevter Compton 103 - Westlake
42 - Grester Echo Park 104 - Westmont

13. Grater El Monte 105 - Wilmington

14. Greater Lincoln Haahe 106 - Casitas Springs
45 - Greer North Hollywood 107 - El Rio
16 - Geer Wilowbrook 108 - Filimore

17. Howa ian Gardens 09 - Nyeland Actes

18. H whorn- 110 - Oxnard
39 - Highland Park 111 - Piru
0- Halkwood 12 Cane Dal.

51. Hude/Harvard Park 113 - Satcoy
52 - Inglewood 114 - West Ventura
Bolo 53 - Koreatown 115 - Boquet Canyon
54 - Lawndale 116 - Canyon Country
55 - Leimert Park 117. Castar
Bay 56 - Lennox 1 1B - Lake Hughes
57 - Uttle Tokyo/Toy DistnetSkid Row 119 - Newhall
58 - Lomita/Southwest Carson 120 - Santa Clarita

59. Los Foliz 121 - Val Verde
MAP 203 60 - Los Niotos
132 - Agua Duice
61 - Manchester/Harvard/Chesterfield 173. Acton

2. Mid City 124 - Avalon
220-
Map 1-4 LA-Ventura Funding Area
DAÇIP Disadvantaged Communities

Greater Los Angeles County Integrated Regional Water Management Table 2-7. Impacts and Effects of Climate Change on Region Impact to Effect
Coastal LA Basin: Increases of 3.5 to 4°F (2040-2060)
Inland LA Basin: Increases of 4 to 4.5°F (2040-2060)
Mountains & Desert: Increases of 4.5 to 5.5°F (2040-2060) Temperature Source: Walton et al 2015
Change
Extreme Hot Days: Number will triple in coastal areas and central Los Angeles, quadruple in San Fernando and San Gabriel Valleys (2040-2060) Source: Sun et al 2015
Across the entire LA Basin: Little to no change (approximately 0%) is expected over Precipitation the next century (2011-2095)
Source: LA Basin Study Task 3.1
Decrease of 1% in gallons per capita per day due to a combination of projected Demand temperature increases and the ranges of precipitation.

Source: LA Basin Study Task 2, Water Supply & Demand Projections State Water Project:

Delivery decrease of 7-10% by 2050
• Snowpack decrease of 48-65% (2070-2099)
Delivery decrease of 21-25% by 2100
Source: DWR 2009
Colorado River:

Imported : Flows to decrease by 7-9% by 2050
Shortages to Lower Basin of:

Supply 1 MAF over any 2-year window up to 51% of the time

1.5 MAF over any 5-year window up to 59% of the time
Source: Reclamation 2012
Los Angeles Aqueduct:

Decrease in "base-of-mountain" runoff of approximately 1.7% (2040-2069) • Decrease in "base-of-mountain" runoff of approximately 5.0% (2070-2099) Source: LADWP UWMP 2011
Sea Level Rise
Rise of 5-24 inches by 2050
(alongibe LA Rise of 17-66 inches by 2100
Source: Grifman et al 2013
coastline)
Non-Santa Ana Fires: Burned area to increase 77% (‡43%) (2040-2060). This type Wildfire Risk f fire will change the most in the future and start to dominate the summer seasor ¡anta Ana Fires: Burned area to increase by 64% (+76%) (2040-2060 Local Decreases of between 31-42% (2040-2060)
Snowpack Decreases of between 31-66% (2080-2100)
Source: Sun et al 2013
Source: LA Basin Study Summary Report
Regional Description | 2-69

Greater Los Angeles County Integrated Regional Water Management Plan Table 4-1: DWR California Water Plan Update 2013 Resource Management Strategies Resources
CA Water Plan
Management
Update 2013
Strategy within CA Strategy Overview
Volume 3 Chapter
Water Plan Update
Number
2013
Reduce Water Demand
Increasing water use efficiency and achieving reductions in the amount of water used for 2 Agricultural Water
agricultural irrigation. Includes incentives, public education, and other efficiency-enhancing Use Efficiency
programs.

Increasing water use efficiency by achieving reductions in the amount of water used for Urban Water Use
3 municipal, commercial, industrial, irrigation, and aesthetic purposes. Includes incentives, Efficiency
public education, and other efficiency-enhancing programs.

Improve Flood Management
4 Strategies that decreasing the potential for flood-related damage to property or life Flood Management including control or management of floodplain lands or physical projects to control runoff. improve Operational Efficiency and Transfers
Maintaining, optimizing use of, and increasing the reliability of regional treated and 5 Conveyance - Delta untreated water conveyance facilities. Included within this strategy is maintaining the ability to obtain and convey imported water supplies into the Region.

Strategies include improvement conveyance systems, upgrading aging distribution systems, promoting development of more extensive interconnections among water resources systems, establishing performance metrics for quantitative and qualitative Conveyance -
6 indicators (e.g., quantity of deliveries, miles of rehabilitated conveyance facilities, and Regional/ Local
resiliency of conveyance to earthquakes and fewer regulatory conflicts), and assuring adequate resources to maintain the condition and capacity of existing constructed and natural conveyance facilities.

Managing surface storage facilities to optimize the availability and quality of stored water 7 supplies and to protect/enhance beneficial uses. Includes balancing supply and delivery System Reoperation
forecasts, coordinating and interconnecting reservoir storage, and optimizing depth and timing of withdrawals.

Contracting to provide additional outside sources of imported water to the Region over and 8 Water Transfers
above contracted State Water Project and Colorado River supplies.

Increase Water Supply
Conjunctive Using and managing groundwater supplies to ensure sustainable groundwater yields while 9 Management and maintaining groundwater-dependent beneficial uses, including coordinating management Groundwater of ground- water and surface water supplies (conjunctive use).

Desalination
10 (Brackish and Sea Developing potable water supplies through desalination of seawater. Includes disposal of waste brine.

Water)
11 Precipitation Increasing precipitation yields through cloud seeding or other precipitation enhancing Enhancement measures.
12 Municipal Recycled Developing usable water supplies from treated municipal wastewater. Includes recycled Water water treatment, distribution, storage, and retrofitting of existing uses 13 urface Storage Developing additional CALFED storage capacity or more efficiently using existing CALFED ALFEDSta storage capacity.

Surface Storage - Developing additional yield through construction or modification (enlargement) of local or 14 regional surface reservoirs or developing surface storage capabilities in out-of-region Regional/Local
Improve Water Quality
Drinking Water Includes improving the quality of the potable supply delivered to potable water customers 15 Treatment and by increasing the degree of potable water treatment. Strategy also may include Distribution fariveyance system improvements that improve the dually of supply delivered to treatment 16 Groundwater/Aquifer Includes strategies that remove pollutants from contaminated groundwater aquifers Remediation through pumping and treatment, in situ treatment, or other means 4-2 Regional Water Management
Greater Los Angeles County Integrated Regional Water Management Plan Table 4-1: DWR California Water Plan Update 2013 Resource Management Strategies CA Water Plan Resources
Update 2013 Management
Strategy within CA Strategy Overview
Volume 3 Chapter Water Plan Update
Number 2013
Improve Water Quality
Matching Water Optimizing existing resources by matching the quality of water supplies to the required 17 Quality to Use
quality associated with use.
18 Pollution Prevention
Salt and Salinity ecommendations that encourage stakeholders to proactively seek to identify source 19 uantify the threat, prioritize necessary mitigation action and work collaboratively wit Management entities with the authority to take appropriate actions.

Urban Stormwater ncludes strategies for managing or controlling urban runoff, including interceptin Runoff Management diverting, controlling, or managing stormwater runoff or dry season runol Practice Resources Stewardship
Includes strategies for promoting continued agricultural use of lands (e.g. agricultural preserves), strategies to reduce pollutants from agricultural lands, and strategies to 21 Agricultural Land maintain and create wetlands and wildlife habitat within agricultural lands. Stewardship Stewardship strategies for agricultural lands include wetlands creation, land preserves, erosion reduction measures, invasive species removal, conservation tillage, riparian buffers, and tail water management.

Strategies that restore impacted or impaired ecosystems, and may include invasive 22 Ecosystem species removal, land acquisition, water quality protection, revegetation, wetlands creation Restoration and enhancement, and habitat protection and improvement, habitat management and species monitoring.

Strategies that promote forest management include long-term monitoring, multi-party coordination, improvement in communications between downstream water users and 23 Forest Management communities and upstream forest managers, residents, and workers, and revisions of water-quality management plans between the State Water Board and forest management agencies to address concerns with impaired water bodies Includes land use controls to manage, minimize, or control activities that may negatively 24 Land Use Planning affect the quality and availability of groundwater and surface waters, natural resources, o and Management endangered or threatened species
Recharge Area Includes land use planning, land conservation, and physical strategies to protect areas that 25 Protection are important sources of groundwater recharge.

Sediment cludes strategies for source, sediment deposition, and transport management as we Management s debris management. It is also a key consideration in flood managemer Watershed Comprehensive management, protection, and enhancement of groundwater and surface 27 Management waters, natural resources, and habitat
People and Water
28 Economic Incentives Includes economic incentives (e.g. loans, grants, water pricing) to promote resource preservation or enhancement.

Outreach and cludes outreach and engagement strategies to reach the broader public, target specifi 29 Engagement elds or professionals, and increase knowledge and participation in public discussions ( water issues.
30 Water and Culture manage an and or he actual tues, nage and practices are flected by water 31 Water-Dependent hancing and protecting water-dependent recreational opportunities and public access t Recreation
Other
Other Resource Management Strategies include
32 Other Strategies Crop Idling for Water Transfers
Dewvaporation/Atmospheric Pressure
Desalination Fog Collectior
4-3 Regional Water Management
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLACIRWMP Approved Projects (as of August 2017) Subregion Project Title Primary Benefits Implementing Organization Lower SG & LA Advanced Water Meter Replacement Project Water Supply Gateway Water Management Authority Lower SG & LA Adventure Park Multi-Benefit Project Water Supply County of LA DPW Lower SG & LA Broadway Neighborhood Stormwater Greenway Project Water Supply City of LA Bureau of Sanitation Lower SG & LA Cabrillo Lane Well Improvement Project Water Supply Gateway Water Management Authority Central-Jefferson High Green Alley Network Storm Water
Lower SG & LA Capture Project Water Supply The Trust for Public Land Lower SG & LA Changeover of irrigation at Parks to use of recycled water Water Supply Gateway Water Management Authority Lower SG & LA City of Bell Water Resources Management Program Water Supply Gateway Water Management Authority Lower SG & LA City of Signal Hill Recycled Water System Phase 1 Water Supply Gateway Water Management Authority Dominguez Gap Spreading Grounds West Basin Percolation
Lower SG & LA Enhancement Water Supply LACFCD
Lower SG & LA Downey Groundwater Well Nos. 27 and 28 Project Water Supply Gateway Water Management Authority Lower SG & LA Feasibility Study of Infiltration Trench Project Flood/Stormwater Gateway Water Management Authority Furman Park/Rio Hondo Elementary School Recycled Water
Lower SG & LA Main Extension and Irrigation System Improvement Project Water Supply Gateway Water Management Authority Gateway Cities Regional Recycled Water System Expansion Lower SG & LA Project Water Supply Gateway Water Management Authority Lower SG & LA Groundwater Reliability Improvement Project (GRIP) Water Supply WRD Multi-jurisdictional Agencies-LA City Housing and
Lower SG & LA Jordan Downs Daylighting Study Environmental PW Los Angeles Forebay Perchlorate and VOC Cleanup -
ower SG & LA Phase 1 Project Water Supply WRD
Lower SG & LA Manhattan Wells Improvement Water Supply LADWP / WRD Optimization of Current Emergency Interconnections to avert _ower SG & LA and mitigate drought related water supply emergencies Water Supply Gateway Water Management Authority Lower SG & LA Paramount Blvd. Turf Replacement Project Water Supply Gateway Water Management Authority ower SG & LA PRWA Plant Water Supply Gateway Water Management Authority Reservoir and Booster Pump Station at Well No. 28 and
New Well No. 29 at the Santa Fe Tank Site Improvements
Lower SG & LA Project Water Supply Gateway Water Management Authority San Jose Creek Water Reclamation Plant East Process
ower SG & ect Water Supply LACSD
Lower SG & LA Soto Street Low Impact Development (LID) Street Project Water Supply Gateway Water Management Authority ower SG & LA South Los Angeles County Groundwater Pipline Project Water Supply WRD Lower SG & LA Southeast Water Efficiency Program Water Supply Gateway Water Management Authority ower SG & LA Storm Drain Catch Basin Retrofit Environmental Gateway Water Managemer Authori Lower SG & LA The Urban Orchard Water Quality Gateway Water Management Authority ower SG & LA Treder Park Stormwater Improvement Project Water Quality Gateway Management Authorit Lower SG & LA Water Quality Protection Plan Well Facility Retrofit Water Supply Gateway Water Management Authority ower SG & LA Well 21 Conversion Project Water Supply Gateway Management Authority Lower SG & LA WRD Eco Gardener Program Water Supply WRD North SM Bay Agoura Road Gap Recycled Water System Expansion Water Supply as Virnanes Munirinal W т District North SM Bay Alternative Decker Canyon Recycled Water Extension Water Supply Las Virgenes Municipal Water District North SM Bay AMR Conversion Project Water Supply ACWD No. 29 North SM Bay Big Rock Bypass Water Supply LACWD No. 29
North SM Bay Citywide Storm. Drain Catch Basin Curb Screens Water Quality City of Calabasas North SM Bay Cold Creek Diamond Acquisition Environmental Mountains Restoration Trust North SM Bay Comprehensive Water Conservation Project Water Supply City of Malibu North SM Bay County Yard Treatment Facility and Wetlands Water Quality Agoura Hills Integrated Regional Projects 5-21
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLACIRWMP Approved Projects (as of August 2017) Subregion Project Title Primary Benefits Implementing Organization North SM Bay Creek Crossings Repairs Water Supply LACWD No. 29 North SM Bay Decker Canyon Recycled Water System Extension Water Supply Las Virgenes Municipal Water District North SM Bay Encinal Emergency Connection Water Supply LACWD No. 29 North SM Bay Gates Canyon Park Project Water Quality County of LA DPW Invasive Non-native Crayfish Removal from Las Virgenes
North SM Bay Creek Environmental Mountains Restoration Trust North SM Bay Invasive Non-native Crayfish Removal from Medea Creek Environmental Mountains Restoration Trust North SM Bay Las Virgenes Creek Restoration Project - Phase Flood/Stormwater City of Calabasas Las Virgenes-Calleguas Municipal Water District
North SM Bay Interconnection Project Water Supply Las Virgenes Municipal Water District LVMWD Woodland Hills Golf Course Recycled Water
North SM Bay Pipeline Extension Water Supply Las Virgenes Municipal Water District North SM Bay Malibu Civic Center Area Recyled Water Delivery Project Water Supply City of Malibu North SM Bay Malibu Rainwater Harvesting Water Quality City of Malibu North SM Bay Malibu Road/Malibu Colony Stormwater Management Water Quality City of Malibu North SM Bay Medea Creek Restoration at Chumash Park Environmenta City of Agoura Hills North SM Bay Oak Park Green Streets Urban Retrofit Water Quality County of Ventura North SM Bay Oak Park Restoration Environmenta Mou is Restoration TrUSt North SM Bay Raw Wastewater Diversion to the City of Los Angeles Water Quality Las Virgenes Municipal Water District North SM Bay Recycled Water Storage and Distribution System Expansion Water Supply Las Virgenes Municipal Water District Thousand Oaks Boulevard and Westlake Elementary
North SM Bay Recycled Water System Extension Water Supply Las Virgenes Municipal Water District North SM Bay Topanga Connection Ao: Environmental Mountains Restoration Trust North SM Bay Trancas Flood Control Channel Restoration Flood/Stormwater RCD of the Santa Monica Mountains North SM Bay Trancas Lagoon Restoration Environmental RCD of the Santa Monica Mountains Triunfo Community Park and Evanstar Park Recycled Water North SM Bay Extension Water Supply Las Virgenes Municipal Water District North SM Bay Viewridge Super Green Streets Water Quality County of LA DPW North SM Bay Water Budget Based Rate Implementation Water Supply Las Virgenes Municipal Water District North SM Bay Westward Beach Road Bioinfiltration Project Water Quality City of Malibu North SM Bay Winter Canyon Biofiltation Project Water Quality City of Malibu South Bay 25mgd Seawater Desalination Plant in West Basin Water Supply West Basin Municipal Water District South Bay Agua Amarga Lunada Canyon Habitat Restoration Environmental PV Peninsula Land Conservancy & City of RPV South Bay Alondra Regional Park Water Quality Successor Agency, City of Compton Andrews Park Subsurface Storage, Use and Infiltration
South Bay Project Water Quality City of Redondo Beach
Ballona Creek Water Quality and Beach Improvement &
South Bay Beneficial Use Project Water Quality City of LA Bureau of Sanitation WPD South Bay Baseball Field Basin Water Quality City of Torrance DPW C Marvin Brewer Desalter Brackish Groundwater Facility
South Bay Expansion Water Supply West Basin Municipal Water District South Bay Carson Regional Water Recycling Project Water Supply West Basin Municipal Water District South Bay City of C ain Barrel Give Away Phase I/ Water Quality City of Carson, DSD Eng. Svos. Div South Bay Conservation Budget Based Tiered Rate Structure Water Supply West Basin Municipal Water District Conversion of 237th Street Sump Tributary to Machado
South Bay Lakes for Nutrient and Toxics TMDL BMPs Water Quality City of Torrance Culver Boulevard Realignment and Stormwater
South Bay Infiltration/Retention Regional Project Water Quality City of Culver City South Bay Deauville Distributed Water Reuse Project Water Supply City of Santa Monica Integrated Regional Projects 5-22
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLAC IRWMP Approved Projects (as of August 2017) Subregion Project Titie Primary Benefits Implementing Organization South Bay Del Rey Lagoon Water Quality Improvement Proi Environmental City of LA Bureau of Sanitation WPD Demonstration Gardens at Los Angeles County Fire
South Bay Department Stations Water Supply West Basin Municipal Water District South Bay Dominguez Channel Greenway Phase I Environmental LACFCD Dominguez Channel Trash Reduction Via ARS Installation in South Bay the City of Carson, CA Water Quality City of Carson, DDSD Eng. Svcs. Div.

South Bay Pa Water Quality City of Inglewood
South Bay Freeway Runoff Infiltration Demonstration Project Water Supply City of Santa Monica South Bay Goldsworthy Groundwater Desalter Expa: Water Supply City of Torrance Green Streets and Water Effecient Landscape on Burton
South Bay Way Median Water Quality City of Beverly Hills South Bay Hermosa Avenue Green Stree Water Quality City of ermosa each South Bay Hermosa Beach Infiltration Facility Water Quality City of Hermosa Beach South Bay Hermosa Greenbelt Infiltration Water Quality City of Hermosa Beach South Bay Herondo Parking Lot and Beach Infiltration Water Quality City of Redondo Beach Improvements to Entradero Storm Drain Channel for Storm City of Torrance, SMBBB TMDL Jurisdictional South Bay Water Infiltration and Habitat Restoration Water Supply Grps 5 & 6 South Bay Inglewood New Well No. 7 Water Supply City of Inglewood La Cienega and Frank Fenton Field Regional Stormwater
South Bay Project Water Quality City of Beverly Hills
South Bay Ladera Park Stormwater Capture Project Water Quality County of Los Angeles South Bay Landscape Irrigation Efficiency Program (LIEP Water Supply West Basin Municipal Water District South Bay Manhattan Strand 28th Street Subsurface Infiltration Trench Water Quality City of Manhattan Beach South Bay Milton Street Park and Green Street project - Ballona Creek Environmental MRC South Bay North Torrance Well Field Project, Phase I!I Water Supply City of Torrance South Bay Northeast Gardena Recycled Water Line Water Supply West Basin Municipal Water District Northeast Gardena Storm Water Quality Park, Recycled
South Bay Water Line, and Landscape Makeover Water Supply Council for Watershed Health Northeast Gardena Water and Landscape Makeover,
South Bay Community Involvement Module Water Supply Council for Watershed Health South Bay Ocean Friendly Garden (OFG) Program Water Supply West Basin Municipal Water District South Bay Oxford Retention Basin Multi-Use Enhancement Project Flood/Stormwater LACFCD South Bay Ozone Park Runoff Treatment and ReUse Project Water Supply City of Santa Monica South Bay Palos Verdes Peninsı : Study Water Supply West Basin Municipal Water District South Bay Palos Verdes Recycled Water Lateral Water Supply West Basin Municipal Water District South Bay Recycled Water On-Site Retrofit Projects Water Supply West Ba cical Water District South Bay Recycled Water Supply for Palos Verdes Golf Course Water Supply City of Palos Verdes Estates South Bay Residential Indoor Plumbing Retrofit Kits Water Supply West Basin Municipal Water District South Bay San Ramon Canyon Stormwater Flood Reduction Project Flood/Stormwater City of Rancho Palos Verdes South Bay SMURRF Distributed Water Reuse Project Water Supply City of Santa Monica South Bay South Coast Botanic Gardens Water Quality Los Angeles County DPW South Bay South Park Subsurface Infiltration Gallery Water Quality City of Hermosa Beach South Bay Southeast Gardena Recycled Water Line Water Supply West Basin Municipal Water District South Bay Stormwater Diversion to nue Sump Water Quality orrance South Bay Sustainable Water Infrastructure Project Water Supply City of Santa Monica Terminal Island WRP Advanc ater Purification Facility
South Bay and Distribution Svstem Expar Water Supply LADWP Terminal Island WRP Advanced Water Purification Facility South Bay and Distribution System Expansion Project Water Supply LADWP Integrated Regional Projects 5-23
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLACIRWMP Approved Projects (as of August 2017) Subregion Project Title Primary Benefits Implementing Or anization South Bay Torrance Airport Underground Infiltration Gallery Water Quality City of Torrance. DW South Bay Transfer Station nItration & Site Improvements Water Quality City of Inglewood South Bay Turf's Up Water Use Efficiency Program Water Quality West Basin Municipal Water District South Bay Van Ness and Slauson Infiltration Best Management Project Water Quality City of LA Bureau of Sanitation WPD Vermont Avenue Storm Water Capture and Green Street
South Bay Beautification Project Water Quality City of LA Bureau of Sanitation WPD South Bay Vermont Median Stormwater Park vironmental Council for Watershed Health South Bay Victoria Street SUDH Water Reuse Concept Proposal Water Supply City of Carson Walnut Storm Water Capture and Groundwater
South Bay Replenishment Basin Phase I Water Quality City of Torrance DPW Washington Boulevard Stormwater Diversion Regional
South Bay Project Water Quality City of Culver City
South Bay Water Star Schools Pilot Program Water Supply West Basin Municipal Water District South Bay Well No. 2 Rehabilitation Water Supply City of Inglewood South Bay West Coast Basin Barrier Project Water Supply LACFCD South Bay Westwood Neighborhood Greenway Project Water Quality City of LA Bureau of Sanitation WPD Whiting St. and El Segundo Blvd. Dry Weather Diversion
South Bay Structure Water Quality City of El Segundo
South Bay FALSE Water Supply West Basin Municipal Water District Upper LA Aliso Creek - Limekiln Creek Restoration Project Water Quality City of LA Bureau of Sanitation WPD Upper LA Arroyo Seco Confluence Gateway Environmental Arroyo Seco Foundation Upper LA Arroyo Seco North Branch Creek Daylighting Environmental Arroyo Seco Foundation Upper LA Be A Water Saver Water Conservation Program Water Supply City of Burbank Water and Power Upper LA Bette Davis Park Water Recycling Project Water Supply LADWP Upper LA Big Tujunga Dam Spillway Dam Water Supply LACFCD Joper LA Bia.Tuiunga Reservoir Sediment Removal Flood/Stormwater LACFCD Upper LA Boulevard Pit Stormwater Capture Project Water Supply LADWP pper LA Branford Spreading Basti Pump Station and Pipeline Water Supply LACFCD Bull Creek Channel Diversion System Pipeline to Pacoima Upper LA Spreading Grounds Project Water Supply LACFCD
Bull CreekLos Angeles Reservoir Water Quality
Upper LA Improvement Project Water Quality LADWP
Upper LA Burbank Partnership Water Recycling Project Water Supply LADWP Burbank Water and Power Recycled Water System
Upper LA Expansion, Phase 3 Water Supply City of Burbank Water and Power Upper LA Caballero Creek & Los Angeles River Confluence Park Water Quality MRCA Upper LA Camino San Rafael Recycled Water Project Water Supply Glendale Water & Power Canterbury Powerline Easement (PLE) Stormwater Capture
Upper LA Project Water Quality LADWP
Upper LA Chase Street Stormwater Greenway Water Quality City of LA Bureau of Sanitation. WPD Upper LA Chevy Oaks Recycled Water Project Water Supply Glendale Water & Power Upper LA City-wide Green Street Project Water Supply City of Calabasas Upper LA Crescenta Valley County Park Stormwater Recharge Facility Water Supply Crescenta Valley Water District Crescenta Valley Water District Nitrate Removal Treatment pper LA Facility at Well 2 Project Water Supply Crescenta Valley Water District Upper LA Devil's Gate Dam and Reservoir Water Conservation Water Supply LACFCD Devil's Gate Reservoir Sediment Removal and Management
Upper LA Project Flood/Stormwater LACFCD
Upper LA East Valley Baseball Park Water Supply LADWP
Integrated Regional Projects 5-24
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLACIRWMP Approved Projects (as of August 2017) Subregion Project Title Primary Benefits Implementing Organization Upper LA Elysian Reservoir Water Quality Improvement Project Environmental LADWP Upper LA Fernangeles Park Water Supply LADWP
Upper LA Foothill Municipal Water District Recycled Water Project Water Supply Foothill Municipal Water District Upper LA Glen Oaks Storm Water Capture Project Water Supply Los Angeles Beautification Team Upper LA Glendale Narrows Habitat Enhancement Project Environmental Council for Watershed Health Upper LA Hansen Dam Water Conservation and Supply Water Supply The River Project Upper LA Hansen Dam Water Conservation Project Water Supply LACFCD Upper LA Headworks East Rese Environmental LADWP
Upper LA Headworks Ecosystem Restoration Environmental LADWP Upper LA Hoover, Toll, & Keppel School Recycled Water Project Water Supply Glendale Water & Power Upper LA Humboldt Stormwater Greenway Water Quality City of LA Bureau of Sanitation WPD Johnny Carson Park Stream Restoration and Park
Upper LA Revitalization Environmental City of Burbank
Upper LA LA River Sixth Street Bridge Greenway Water Quality City of Los Angeles, Bureau of Eng Upper LA Water Supply Los Angeles County Flood Control DistrictLACFCE Los Angeles River Center and Gardens Green Conference
Upper LA Center Water Quality MRCA
Upper LA os Angeles River Natural Park Water Quality City of LAs Bureau of Sanitation WPD Los Angeles River Revitalization Master Plan 32 Mile
Upper LA Channel and Easement Greening Environmental City of Los Angeles, Bureau of Eng.

Upper LA Los Angeles State Historic Park Water Recycling Project Water Supply LADWP Upper LA Los Angeles-Burbank Groundwater System Interconnection Water Quality LADWP / Burbank Water and Power Upper LA Los Angeles-Glendale Groundwater System Interconnection Water Supply LADWP / Glendale Water and Power Upper LA Marsh Park, Phase I| Environmental MRCA
Upper LA Mission Hills Green Belt Wat upply The River Project Upper LA Mission Wells Improvement Water Supply LADWP
Upper LA North Hollywood Central Treatment Water Quality LADWP North Hollywood Groundwater and Surface Water Benefits
Upper LA Study Water Supply Council for Watershed Health Upper LA North Hollywood Street Enhancement Water Quality City of Los Angeles North Hollywood Transmission Corridor Easement
Upper LA Stormwater Capture Study Water Supply Council for Watershed Health North Hollywood West Wellhead Treatment Water Quality LADWP Upper LA Old Pacoima Wash Stormwater Project Concept Report Water Supply LACFCD pper LA Pacoima Dam Iilet/Outlet Works Rehabilitation Project Water Supply LACFCD Upper LA Pacoima Reservoir Sediment Removal Flood/Stormwater LACFCD Upper LA Pacoima Spreading Grounds Improvements WarS pply LACFCD Upper LA Pasadena Non-Potable Water Project - Phase 1 Water Supply Pasadena Water and Power Upper LA Pasadena Non-Potable Water Project - Phases 2-6 Water upply Pasadena Water and Power Upper LA Pollock Wellhead Treatment Water Quality LADWP Crescenta Valley Water District and Glendale
Upper LA Rockhaven Well Water Supply Water and Power
Upper LA San Rafael Creek Restoration Environmental Arroyo Seco Foundation City of LA Bureau of Sanitation Wastewater Eng
Upper LA Septic-To-Sewer Drinking Waterwell Protection Project Water Quality Svcs. Div.

Sepulveda Basin Sports Complex Multi-Purpose Open
Upper LA Space Project Environmental City of Los Angeles, Bureau of Eng.

Ipper LA Sepulveda Basin Sports Complex Riparian Buffer Environmental City of Los Angeies, Bureau of Eng Integrated Regional Projects 5-25
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLACIRWMP Approved Projects (as of August 2017) Subregion Project Title Primary Benefits Implementing Organization Upper LA Sheldon Pit Water Supply LADWP
(Upper LA Shoestring Park Water Supply Council for Watershed Health Upper LA Silver Lake Reservoir Bypass & Regulator Station Environmental LADWP Sun Valley Watershed Rory M. Shaw Wetlands Park Project Upper LA (a.k.a. Strathern Wetlands Park) Flood/Stormwater LACFCD Upper LA Taylor Yard River Park Parcel G2 Environmental City of LA Bureau of Eng.

Upper LA Tujunga Central and Wellhead Treatment ater Quality LADWP Upper LA Two-Strike Park Recycled Water Project Water Supply Crescenta Valley Water District Upper Los Angeles River Big Tujunga Restoration Arundo
Upper LA Eradication Project Environmental National Forest Foundation Upper LA Valley Generating Station Stormwater Capture Project Water Supply LADWP Upper LA Verdugo Hills Stormwater Project Environmental City of LA Bureau of Sanitation WPD Upper LA Water LA Phase 2 Water Supply The River Project Whitnall HWY Powerline Easement Stormwater Capture
pper LA Project Water Supply LADWP
Upper LA Whitsett Sports Field Water Supply LADWP
Allen J. Martin Park Stormwater Capture Multi-Benefit
Upper SG & RH Project Water Quality County of LA DPW
Upper SG & RH Arboretum of Los Angeles County Water Supply City of Arcadia/Los Angeles County Upper SG & RH Barnes Park Stormwater Capture and Infiltration Project a er Quality City of Baldwin Park Bassett High School Stormwater Capture Multibenefit
Upper SG & RH Project Water Quality County of LA DPW
Upper SG & RH Bassett Park Stormwater Capture Multi-Benefit Project Water Quality County of LA DPW Upper SG & RH Big Dalton Sluiceway Rehabilitation Flood/Stormwater LACFCD Upper SG & RH Big Dalton Spreading Grounds Improvements Water Supply LACFCD City of Monrovia Fire Department - Training Center Water Upper SG & RH Recycling Project Water Supply USGVMWD
Upper SG & RH Cogswell Dam Inlet/Outlet Works Rehabilitation Project Flood/Stormwater LACFCD Upper SG & RH Cortez Park EWMP Project Water Quality West Covina Downtown Glendora Storm Water Quality Improvement
Upper SG & RH Project Water Quality City of Glendora
Upper SG & RH Eaton Spreading Grounds Intake Improvements Water Supply LACFCD Upper SG & RH Eaton Wash Dam inlet/Outlet Works Rehabilitation Project Flood/Stormwater LACFCD Upper SG & RH Eisenhower Park Water Supply City of Arcadia Upper SG & RH Encanto Park Water Supply City of Duarte
Improvements to San Gabriel River Diversion and San
Upper SG & RH Gabriel River Water Committee Canal and Appurtenances Water Supply Azusa Light and Water Upper SG & RH Indirect Reuse Replenishmenf Project Water Supply USGVMWD Upper SG & RH L. Garcia Park Water Supply City of Monrovia La Puente Valley County Water District Recycled Water USGVMWD & La Puente Valley County Water Upper SG & RH Project Water Supply District
Upper SG & RH LADWP Easement Water Quality City of Azusa Upper SG & RH Large Landscape Irrigation Survey and Retrofit Project Water Supply USGVMWD Upper SG & RH Live Oak Dam Inlet/Outlet Rehabilitation Flood/Stormwater LACFCD Upper SG & RH Live Oak Spreading Grounds Improvement Project Water Supply.. LACFCD Upper SG & RH Memorial Park Water Supply City of Azusa
Upper SG & RH Miller Pit Spreading Basins Water Supply LACFCD Upper SG & RH Olive Pit Water Conservation Park Water Supply LACFCD Ubper SG &RH Pack Water Conservation Improvement Project Water Supply LACFCD Upper SG & RH Recreation Park Water Supply City of Monrovia Integrated Regional Projects 5-26
Integrated Regional Water Management Plan Greater Los Angeles County Table 5-3: GLACIWMP Approved Projects (as of August 2017) Subregion Project Title Primary Benefits Implementing Organization Upper SG & RH Regional USGR EWMP Project - Kahler Russell Park Water Quality City of Covina Upper SG & R Regional Water Supply Reliability Program Phase 1b Water Supply Puente Basin Water Agency Upper SG & RH Royal Oaks Trail Water Supply City of Bradbury Upper SG & RH San Angelo Park Stormwater Capture Multi-Benefit Project Water Quality County of LA DPW Upper SG & RH San Gabriel Dam Penstock Coatings and Valve Repair Flood/Stormwater LACFCD San Gabriel Valley Water Recycling Project (Phase I - Rose Upper SG & RH Hills Expansion). Water Su v US/W
Upper SG & RH Santa Anita Dam Seismic Rehabilitation Flood/Stormwater LACFCD Upper SG & RH Santa Fe Spillway Basins Water Supply LACFCD Upper SG & RH Sawpit Debris Dam Seismic Strengthening Project Flood/Stormwater LACFCD Upper SG & RH Sierra Vista Park Water Supply City of Sierra Madre Upper SG & RH Six Basins and Puente Basin Integrated Water Supply Projec Water Supply Puente Basin Water Agency Upper SG & RH South El Monte Recycled Water Expansion Project Water Supply USGV MWD & SGV Water Company South El Monte Recycled Water Expansion Project Package Upper SG & RH 1 Water Supply USGV MWD & SGV Water Company Upper SG & RH Walnut Creek Spreading Basin Improvements Water Supply LACFCD Upper SG & RH Well 15 Water Supply San Gabriel County Water District Integrated Regional Projects 5-27

Integrated Reglonal Water Management Plan Greater Los Angeles County

LIST OF ACRONYMS
ACS American Community Survey
AF acre-feet
AFY
Army Corps
ASBS
AV
BDCP
BMP
Caltrans
CASGEM
CARB California Air Resources Board
CCA Critical Coastal Area
CCL Contaminant Candidate List
CDPH California Department of Public Health
CEQA California Environmental Quality Act
CEDEN California Environmental Data Exchange Network
CEIC California Environmental Information Catalog
CERES California Environmental Resource Evaluation System v cfs cubic feet per second
COG Council of Governments
Council Council for Watershed Health
CRA Colorado River Aqueduct
CREST Cleaner Rivers through Effective Stakeholder-led TMDLs CSMP Coordinated Shoreline Monitoring Plan
CWP California Water Plan
CUWCC California Urban Water Conservation Council
DAC Disadvantaged Community
Dichloro-diphenyl-trichloroethane
Call in Depen Set or Water Resouces
rinking Water Source Assessment and Protectio
EJ nvironmental Justic
EPA
ESHA
FEMA Federal Emergency Management Agency
FoLAR Friends of the Los Angeles River
GAMA
GHG
GLAC
GOPR
GWMP Groundwater Management Plan
HOSP Habitat and Open Space
IRP
Integrated Resources Pater Management
IRWM
IRWMP Integrated Regional Water Management Plan
Table of Contents vii

APPENDIX I
I. Lower San Gabriel and Los Angeles Rivers Subregional Plan Lower San Gabriel and Los Angeles
Rivers Subregional Plan
Final
Prepared by:

RMC
Water and Environment
In Association with:

Geosyntec®
consultants
Amended October 2017
GLAC IRWM Lower San Gabriel and Los Angeles
Rivers Subregional Plan
Surface Water
There is no direct potable use of surface water within this Subregion; however, surface water flow from the Los Angeles River, Rio Hondo and the San Gabriel River are used to recharge groundwater at spreading grounds which are discussed further in the groundwater section.

Groundwater
Groundwater is a major water supply in this Subregion, representing approximately 55% of water supplies in 20102017. The primary groundwater basin is Central Basin, in addition to the West Coast Basin, La Habra Basin and Orange County Basin.

The Central Basin is adjudicated through the Central Basin Judgment, with the total amount of allowable extraction rights set at 217,367 AFY. The Water Replenishment District of Southern California (WRD) groundwater reliability programs and projects.

Groundwater recharge in the Central Basin occurs via existing and restored natural channel bottoms, percolation of rainwater (natural recharge), underflow from neighboring basins, irrigation, and other incidental recharge; however, natural recharge is typically insufficient to maintain basin water levels and current pumping levels due to the extent of impervious surfaces. To augment the groundwater which naturally recharges Central Basin, artificial recharge using river water, imported water, recycled water and runoff augments and blends with groundwater, and is eventually extracted for potable use. Artificial recharge facilities in the Central Basin include the following (LACDPW, 2011):
• Dominguez Gap Spreading Grounds - recharge controlled flows from the Los Angeles River and uncontrolled flows from storm drains
• Rio Hondo Coastal Spreading Grounds - recharge controlled releases from San Gabriel Canyon Dams, Santa Fe Dam and Whittier Narrows Dam, uncontrolled runoff via San Gabriel River and Rio Hondo channel, and imported and recycled water
San Gabriel Coastal Spreading Grounds - recharge controlled and uncontrolled releases from San Gabriel Canyon Dams, Santa Fe Dam and Whittier Narrows Dam, and imported and recycled water
• San Gabriel River at Montebello Forebay - in-river recharge controlled releases from San Gabriel Canyon Dams, Santa Fe Dam and Whittier Narrows Dam, uncontrolled runoff via San Gabriel River, and imported and recycled water
• Alamitos Gap Barrier Project - injects imported water and recycled water to prevent seawater intrusion
The West Coast Basin, also adjudicated, lies mostly in the South Bay Subregion to the west, but a small portion lies in the Lower San Gabriel and Los Angeles Rivers Subregion. Like Central Basin, West Coast Basin is managed by the California Department of Water Resources and WRD. This basin is hydrologically connected to Central Basin, receiving underflow at the Dominguez Gapacross the Newport-Inglewood Uplift. Groundwater basin recharge can occur via existing and restored natural channel bottoms, percolation of rainwater irrigation, and other native incidental recharge; however natural recharge is typically insufficient to maintain basin water levels and current pumping levels due to the extent of impervious surfaces and the presence of clay soils in parts of the Subregion. There are currently injection wells in place in the West Coast Basin which inject recycled water and imported water along the coast to form barriers to seawater intrusion in two locations (the Dominguez Gap and West Coast Basin Barriers). (West Basin MWD, 2011)
8 GLAC IRWM Lower San Gabriel and Los
Angeles Rivers Subregional Plan
The Orange County Basin underlies the eastern portion of the southeastern portion of the Subregion, and is separated from the Central Basin boundary along Coyote Creek and the Los Angeles/Orange County line.

This basin is adjudicated, and is managed by the Orange County Water District. Recharge to the Orange County Basin is primarily from the Santa Ana River through permeable sands and gravels within the forebay areas. Recharge also occurs through precipitation, irrigation, and other native incidental recharge.

Artificial recharge activities include injection through wells at the Talbert and Alamitos seawater barriers, and spreading of imported and recycled water at spreading grounds. Artificial recharge facilities overlying the Orange County Basin allow for the recharge of Santa Ana River water, imported water, and recycled water. These facilities are located in the cities of Anaheim and Orange, as well as along the Santa Ana River. and include the following:
• Santa Ana River in the forebay areas
• Conrock and Warner Percolation Basins
• Burris Pit Percolation Basin
• Talbert seawater barrier
• Alamitos seawater barrier
La Habra Basin is located in northern Orange County, north of the Orange County Basin. Little groundwater production occurs in this basin due to low transmissivity and poor water quality caused by high TDS, sulfates, nitrates and color. The La Habra Basin is currently unmanagedan older name for a basin now part of both the Central Basin and Orange County Basin. It is managed by either WRD (for the portion in the Central Basin) or Orange County Water District (for the portion in the Orange County Basin), or managed separately in the cities of La Habra and Brea.

In addition to the above discussed basins, some water agencies utilize groundwater pumped from the San Gabriel Basin to the northeast of the Subregion, including: the City of Whittier, California Domestic Water Company, San Gabriel Valley Water Company and Suburban Water Systems. 9 GLAC IRWM Lower San Gabriel and Los Angeles
Rivers Subregional Plan
Groundwater Quality
Groundwater quality varies throughout the Subregion, based on naturally occurring conditions, historical land use patterns, and groundwater extraction patters. Poor groundwater quality can be attributed to several factors including over-drafting of groundwater basins (sometimes resulting in seawater intrusion), industrial discharges, agricultural chemical usage, legacy contaminants in urban runoff, and naturally occurring constituents. The cost of treating these contaminants is often significant, and for some improperly disposed chemicals, effective treatment has not yet been identified.

Central Basin is generally of good quality but has some localized areas of poor quality, primarily along the basin margins and in those aquifers affected by seawater intrusion. As stated previously, WRD monitors and manages both levels and water quality in Central Basin. The primary constituents of concern in this basin include: TDS, VOCs, perchlorate, nitrate, iron, manganese, arsenic, and chromium. WRD has determined through its monitoring and sampling program that special interest constituents, including arsenic, hexavalent chromium, MTBE, total organic carbon, color and perchiorate, do not pose a substantive threat to the basin. (MWD, 2007)
In order to mitigate localized groundwater quality problems, WRD established a Safe Drinking Water Program to provide pumpers with wellhead treatment equipment to remove VOCs from the groundwater which has restored over 30,00038,000 AFY of groundwater to beneficial use. Seawater intrusion is controlled in the basin through the Alamitos Gap Barrier Project run by the Los Angeles County Department of Public Works. (WRD, 2012)
West Coast Basin has high levels of TDS in the Torrance/Hawthorne area, which are outside the Subregion, that can be attributed to both sea-water intrusion and naturally occurring soil and geologic conditions in the region. Increases in groundwater TDS concentrations are primarily attributed to seawater intrusion, but are also a function of the recharge of storm and urban runoff, imported water, and incidental recharge. Seawater intrusion is attributed to the extraction of groundwater above natural replenishment levels. To reduce this, Los Angeles County operates and maintains two seawater intrusion barrier systems along the coast that utilize recycled water and imported water to reduce the seawater intrusion in coastal aquifers. Additionally, West Basin MWD and WRD operate desalting facilities to reduce these high TDS levels. (MWD, 2011)Water quality in the Orange County Basin is managed by the Santa Ana Water Project Authority (SAWPA). In addition to quality issues (including high TDS) due to seawater intrusion, this basin's constituents of concern include: nitrate, VOCs, perchlorate, color, and NDMA. There are several groundwater treatment projects within the basin, though they don't fall within this Subregion. (MWD, 2011)
Near-Shore Ocean Water Quality
There are several indicators of coastal water quality. One of the most publicized is the annual report by Heal the Bay. The annual report evaluates California beaches from Memorial Day to Labor Day giving make swimmers sick Stateside, 92% of Califormia bellies cared or groes over the summer, the same as last year, according to the 2011 report. Additionally, constituents such as PCBs, metals, DDT and other pesticides, and PAHs have been found in coastal waters.

2.5 Environmental Resources
Due to the Subregion being highly urbanized, with its rivers engineered to protect homes and businesses from flooding, large areas of aquatic habitat have been lost. Despite their altered state, the Subregion's channels still serve as habitat for wildlife.
18 APPENDIX J
J. North Santa Monica Bay Subregional Plan
North Santa Monica Bay
Subregional Plan
Final
Prepared by:

RMC
Water and Environment
In Association with:

Geosyntec®
consultants
Amended October 2017
GLAC IRWM North Santa Monica Bay
Subregional Plan

2.4 Sources of Water Supply
Sources of supply vary throughout the Subregion, as shown in Table 1. This table was developed based on 2010 Urban Water Management Plans (UWMPs) from the following agencies:
• Las Virgenes (portion within the Subregion - 87% area • Los Angeles County Waterworks District #29
• Calleguas
• West Basin
• California Water Services Company, Westlake
• Lake Sherwood
• Triunfo Sanitation District / Oak Park Water Service
Table 1: Actual Retail Supplies (acre-feet per year)
Suppl 2010
Groundwater <1,000
Imported 35,000
Recycled (Non-Potable Reuse) 5.000
Surface Water Diversions
Desalinated Ocean Water
Water Use Efficiency <1,000
Stormwater Capture and Use <1,000
Total 40,000
Data sources: 2010 Urban Water Management Plans of agencies listed above Supplies are rounded to the nearest thousand acre-feet per year.

Groundwater
Groundwater represented less than one percent of the Subregion's supplies in 2010. The Hidden Valley, Russell Valley, and Thousand Oaks Area, and Malibu Valley Basins are the only groundwater basins underlying the Subregionin the North Santa Monica Bay Subregion included in the Los Angeles Regional Water Quality Control Board's Basin Plan and in the California Statewide Groundwater Elevation Monitoring (CASGEM) Program (Figure 7). Each basin is relatively small with relatively low yield and for the most part produces poor quality water that is not-non-potable water with high concentration of total dissolved solids and sulfates, chloride or alkalinity. There are no public potable supply wells. The CASGEM Basin Prioritization process listed the basins as very low priority. There are groundwater wells located in these basins and throughout the subregion, but the numbers and extent to which they are used for drinking water is unknown. There are concerns that in some cases these wells decrease streamflow and could have negative impacts on aquatic habitat. Little else is known about their water quality, including whether any has nitrate, arsenic, perchlorate or hexavalent chromium contamination. Given that there is no heavy industry or significant agriculture in the region, the presence of those contaminants is unlikely. The Russell Valley Basin is used by Las Virgenes MWD pumps water from the Russell Valley Basin to augment supplies for its reeyeled water systemto augment supplies for its recycled water system and by the Westlake Lake Management Association to maintain lake levels and environmental flows to Triufino Creek. The maximum yield of this basin is 400 AFY, and the basin is not adjudicated. These groundwater basins are not utilized by water agencies within the Subregion. (MWDSC, 2007)
10 APPENDIX K
K. South Bay Subregional Plan
South Bay
Subregional Plan
Final
Prepared by:

RMC
Water and Environment
In Association with:

Geosyntec"
consultants
Amended October 2017
GLAC IRWM South Bay Subregional Plan
1 Background and Purpose of Subregional Plan
The South Bay Subregional Plan is one of five subregional plans that make up the Greater Los Angeles objectives, and targets.
2 South Bay Subregion Description

2.1 Physical Setting
Figure 1: GLAC Subregional Boundaries
The South Bay Subregion of the Greater
Los Angeles County Integrated
Regional Water Management Region
(GLAC IRWM Region) is located in the
southwest area of Los Angeles County
and is composed of the southeastern half
of the Santa Monica Bay Watershed,
along with the Dominguez Channel
Watershed. The Subregion's watersheds
consist of three defining
Lower San Gabrei and
characteristics-its coastline, its tower Los Angeles Rivers North Santa Monica Bay
population and its industry. More than
South Bay
30 miles of coastline in the South Bay Upper Los Angeles River attracts tens of millions of visitors every Upper San Gabnel River enl Ro Hando
year, serves as an important recreation
area for the area's residents, and in a
few remaining pockets such as the Palos Verdes Peninsula, Madrona Marsh, Ballona Wetlands, portions of the Santa Monica Mountains and Baldwin Hills, supports a diverse population of birds and other wildlife.

With over 2.6 million residents according to the 2010 census, the South Bay is one of the most dense and economically diverse urban areas of the region, creating both challenges to preserve and enhance local water resources and the natural environment, as well as unique opportunities for collaboration. Population projections from the Southern California Association of Governments (SCAG) estimate that the population within the South Bay could increase to over 3 million residents by 2035. The South Bay's industries--oil refining, power generation and transportation via the Port of Los Angeles, Los Angeles International Airport and major freeways— provide similar challenges and opportunities. (U.S. Census Bureau, 2012; SCAG, 2012)
Political Boundaries
The South Bay Subregion is located within the Los Angeles County and includes over 20 cities and unincorporated areas. Figure 2 depicts the county and city boundaries of the South Bay Subregion.

Climate, Temperature, and Rainfall
The South Bay is within the Mediterranean climate zone, which extends from Central California to San Diego, and is characterized by winter precipitation, mostly falling in a few major storm events between November and March, followed by dry summers. Long-term annual average rainfall is approximately 12 inches per year, but can vary greatly from year to year and between the coast and the Santa Monica Mountains.
1 GLAC IRWM South Bay Subregional Plan
Water Suppliers and Infrastructure
The water suppliers in the Subregion can be divided into wholesalers and retailers. Wholesalers (Figure 4) provide imported water and/or recycled water and to other agencies, while retailers (Figure 5) sell water to end users. The major wholesalers in the Subregion include West Basin Municipal Water District (WBMWD) and Metropolitan Water District of Southern California (MWDSC). The major retailers in the Subregion include Los Angeles Department of Water and Power (LADWP) and the cities of Santa Monica, Torrance, and Beverly Hills(shown in Figure 5). The retailers that are customer agencies of WBMWD include California American Water Company, California Water Service Company, Golden State Water Company, Los Angeles County Waterworks District #29, City of Lomita, City of Manhattan Beach, City of Inglewood, and City of El Segundo. These suppliers use a combination of imported water, groundwater, and recycled water to serve potable and non-potable demand in their service areas. Each of these major suppliers has written a comprehensive 2010 UWMP to estimate future water supply demands and availability, and which were utilized in the estimation of supplies discussed later in this plan.

Given that this Subregion is highly urbanized, there is extensive water infrastructure in place for the production of water and the delivery of water to both retailers and to end-users. A number of cities have groundwater wells in place for the pumping of the groundwater basins in the area. In addition, the MWDSC delivers water through imported water feeder pipelines to WBMWD, Torrance, Los Angeles, Santa Monica and Beverly Hills.

2.3 Sources of Water Supply
The South Bay has developed a diverse mix of local and imported water supply sources. Local water resources include groundwater, recycled water, water conservation, and water transfers. Water is imported through the California State Water Project (SWP), the Colorado River Aqueduct, and the Los Angeles Aqueduct. Major water supply sources are described below.

Sources of retail supply vary throughout the Subregion, as shown in Table 1. This table was developed based on 2010 Urban Water Management Plans (UWMPs) whose service areas cover a majority of the Subregion. These agencies include:
• WBMWD (portion within Subregion)
• City of Torrance
• City of Beverly Hills
• City of Santa Monica
• City of Los Angeles (portion within Subregion)
In addition to retail supply, replenishment supply is needed to both replenish the West Coast Groundwater Basin and to use with injection wells serving as seawater barriers. Table 2 shows 2010 supplies used to meet replenishment needs.
7 GLAC IRWM South Bay Subregional Plan
water projects in the Subregion that were identified in the MWDSC's Integrated Water Resources Plan are Table 3: Existing Recycled Water Projects
Sponsoring timate Capacity (аст
LADWP Edward C. Little Water Recycling Facility 1,000
Phase I-IV
Santa Monica Urban Runoff Recycling 280
City of Santa Monica Facility (SMURRF)
Torrance Edward C. Little Water Recycling Facility 7,800 Phase I-IV
West Basin MWD Edward C. Little Water Recycling Facility 54,800 Phase I-IV
Table 4: Future Recycled Water Projects
Sponsoring Agency Project N Ultimate Capacity lacre-feet! LADWP LAX Cooling Towers 240
Carson Regional Water Recycling
Facility Phase II Expansion Project to 9,300
serve LADWE
West Basin MWD Edward C. Little Water Recycling Facility 5,026 Phase V
Carson Regional Water Recycling
Facility Phase Il Expansion Project to 2,100
serve BP
Desalinated Ocean Water
Desalinated ocean water can add to the Region's water supply reliability by diversifying its water supply sources. From 2010-2014, WBMWD operateds the Ocean Water Desalination Demonstration Facility and Water Education Center to evaluate and demonstrate ocean protection, energy recovery and cost reduction technologies with the goals of ensuring a full scale ocean-water desalination facility will be done in a cost and energy efficient manner while protecting the ocean. WBMWD will decommissionis this facility while working on plans for a full-scale facility planning on expanding this facility in the future to provide up to 21,000 AFY of desalinated ocean water.

Stormwater Capture and Use
Stormwater capture and use is a method that can be used by municipalities both to add a source of supply to its water portfolio, and to reduce runoff that can contribute to flooding and water quality issues. Because this watershed has minimal opportunity to capture large quantities of water for infiltration to underlying water supply basins, stormwater capture and use will largely be used for irrigation purposes rather than directly for drinking water consumption. Stormwater use is currently taking place at a local level whereand the City of Los Angeles has completed is planning on developingits-a Stormwater Capture Master Plan,, and the 11 GLAC IRWM South Bay Subregional Plan
In addition, the City of Santa Monica and WBMWDwhich actively promotes the use of rainwater for various non-potable applications through free workshops in addition to rain barrel and cistern rebates.

2.4 Water Supply and Demand
As water agency boundaries are not aligned with the subregional boundaries, water demand was estimated based on review of 2010 Urban Water Management Plans (UWMPs) for:
• West Basin MWD (portion within Subregion)
• City of Torrance
• City of Beverly Hills
• City of Santa Monica
• City of Los Angeles (portion within Subregion)
The demand projections in WBMWD's Regional UWMP were included as its service area covers the areas not covered by the individually listed cities. Given that the City of Los Angeles covers multiple subregions, the portion included in the South Bay Subregion was applied to the total demand estimated in the City of ¿os Angeles's UWMP to approximate the demand of the City of Los Angeles within the South Bay Subregion.

Demand projections for the South Bay Subregion can be seen in Table 5.

Table 5: Current and Projected Subregion Water Demand
2035
426,000 AF 477,000 AF 498,000 AF 507,000 AF 518,000 AF 522,000 AF

2.5 Water Quality
The GLAC Region has suffered water quality degradation of varying degrees due to sources associated with urbanization, including the use of chemicals, fertilizers, industrial solvents, automobiles and household products. Both surface water and groundwater quality have been impacted by this degradation which can be classified as either point or nonpoint sources. Regulations are in place to control both types of sources, and are often updated to control constantly changing water quality issues.

The Federal Water Pollution Control Act Amendments of 1972, amended in 1977, are commonly known as the Clean Water Act. The Clean Water Act established the basic structure for regulating discharges of pollutants into the waters of the United States and gave the USEPA the authority to implement pollution control programs. In California, per the Porter Cologne Water Quality Control Act of 1969, responsibility for protecting water quality rests with the State Water Resources Control Board (SWRCB) and Regional Water Quality Control Boards (RWQCBs).

The Subregion has 303(d) listings related to both human activities and natural sources. Human activities can produce poor water quality due to trash, nutrients from wastewater treatment effluent, metals, and toxic pollutants. These pollutants can be carried in stormwater runoff and through point source discharges, impacting streams, canyon ecosystems, and eventually beaches and offshore waters. Natural sources of contaminants primarily include minerals and metals from underlying local geology.

Even though agencies and cities in the Subregion have significantly reduced pollutants that are discharged to water bodies from individual point sources since the Clean Water Act was established, many of the major water bodies are still considered impaired due to trash, bacteria, nutrients, metals, and toxic pollutants. Water quality issues affecting the Subregion's local surface waters and groundwater basins are discussed below. 12 GLAC IRWM South Bay Subregional Plan
The City of Santa Monica pumps, treats, and distributes groundwater for drinking water purposes from the Santa Monica Basin. Within the Santa Monica Basin, there are three City well fields, the Arcadia Well Field located in the Arcadia Subbasin, the Santa Monica Well Field located in the Olympic Subbasin, and the Charnock Well Field located in the Charnock Subbasin (Figure 8-A). The City actively monitors the groundwater in these Subbasins in accordance with the Los Angeles Regional Water Quality Control Board and the State Water Resources Control Board: Division of Drinking Water Programs. Extensive groundwater
monitoring and chemical analysis are performed to confirm compliance with Federal and State Drinking Water standards.

The City of Santa Monica reported no detections of perchlorate during the 1st Period (2011-2013) and the Second Period (2014-2016) of the Third Compliance Cycle for the groundwater from the Santa Monica Basin entering the City of Santa Monica's Arcadia Water Treatment Plant - System No. 1910146 and Amended Permit No. 1910146PA-003.

The two City drinking water wells located at the Water Treatment Plant and in the Arcadia Subbasin are non-detect for perchlorate. In the Charnock Subbasin, there have only been 3 low and sporadic detections of perchlorate in the more than 17 years of groundwater monitoring efforts. Well RMW-19 revealed a perchlorate detection of 2.9 pb and 3.1 ppb in July 2010. Well RMW-9 revealed a perchlorate detection of

2.2 ppb in July 2013. The CA State MCL for perchlorate is 6.0 ppb. Perchlorate was not detected in both wells before and after these reported detections.

In the Olympic Subbasin, perchlorate was detected in 2 of the 3 aquifer zones, according to the October 2010 Groundwater Monitoring Report, prepared by AMEC Geomatrix. It was detected in the upper A and B zones. Perchlorate concentrations ranging from non-detect to 37.3 ppb were detected in the A zone.

Perchlorate concentrations ranging from non-detect to 77.0 ppb were detected in the B zone. Perchlorate was not detected in the lower aquifer C zone where the City pumps groundwater for drinking water use.

Figures 8-A, 8-B, and 8-C present perchlorate concentrations in the 3 aquifer zones as reported in 2010. The RWQCB determined that perchlorate contamination in the upper aquifer zones was not significant and further groundwater monitoring was not required.

There has been no impact to the City of Santa Monica and surrounding communities located within the Santa Monica Basin due to the localized and low-level detections of perchlorate. Perchlorate has not been detected in groundwater influent to the Santa Monica Water Treatment Plant.

There are no efforts being undertaken in the region to address the localized and low-level detections of perchlorate in the Santa Monica Basin. The presence of perchlorate in the Santa Monica Basin is not considered significant and does not present a health risk. No further efforts are required.

GLAC IRWM South Bay Subregional Plan
Figure 8-A: Perchlorate 1-4-Dioxane, and Hexavalent Chromium Concentrations Zone A Exclaralicn
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GLAC IRWM South Bay Subregional Plan
Figure 8-B: Perchlorate 1-4-Dioxane, and Hexavalent Chromium Concentrations Zone B Exclanatan
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AMEC Geamatrix FiguE 13
GLAC IRWM South Bay Subregional Plan
Figure 8-C: Perchlorate 1-4-Dioxane, and Hexavalent Chromium Concentrations Zone C Expanaton
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GLAC IRWM South Bay Subregional Plan
Madrona Marsh
The Madrona Marsh Preserve, located in Torrance, is the last vernal marsh remaining in the South Bay Subregion and one of few aquatic habitats located within its urban landscape. Formed eons ago when the mountains of the Palos Verdes Peninsula rose to the south, Madrona Marsh is a shallow depression fed by wet season storms, as the name "vernal" indicates. After the rainy season, evaporation, percolation and transpiration reduce the water depth by about one-quarter of an inch (6 mm) per day. By the end of August. the aquatic habitat is dry and remains so until the following rainy season. Situated on land that was set aside for oil production in 1924, Madrona Marsh was never developed-unlike the surrounding city-and remains a valuable natural habitat for birds, reptiles, insects and even small mammals. (Friends of Madrona Marsh, 2012)
Machado Lake
Machado Lake, located in Ken Malloy Harbor Regional Park along the Wilmington Drain, is a perennial freshwater lake and marsh that provides aquatic habitat to a number of species. Due to contamination by surrounding urban land uses, this area ishas undergoneing ecosystem rehabilitation by the City of Los Angeles and Los Angeles County (SDLAC, 2010). Partial funding for this rehabilitation semes came from the Proposition 50 Integrated Regional Water Management Grant Program.

2.6.2 Riparian Habitat
Riparian habitat is typically a linear corridor of variable width that occurs along perennial, intermittent, and ephemeral streams and rivers. In undisturbed areas, two distinguishing features of riparian ecosystems are the hydrologic interaction that occurs between the stream channel and adjacent areas through periodic exchange of surface water and groundwater, and the distinctive geomorphic features and vegetation communities that develop in response to this hydrologic interaction.

Due to the extensive urbanization on the coastal plain and inland valleys, current riparian habitat within the Subregion bears little resemblance to the pre-development conditions. Faber et al. (1989) estimated that 90- to 95-percent of the riparian habitat has been lost. Most native riparian habitat in the Subregion is located in the Santa Monica Mountains; in the restored riparian corridor below the Westchester Bluffs.

Ballona Creek
Ballona Creek is an approximately nine mile long flood control channel surrounded by urban development and traversed by roads, freeways, and infrastructure. The creek has the potential of providing a habitat corridor from Baldwin Hills to the Ballona Wetlands, but currently does not contain significant riparian habitat. However a 50 acre riparian corridor and freshwater marsh for stormwater management purposes were completed in the early 2000's and contains many willows, cattails and tule habitat areas.

The Ballona Creek Greenway Plan is the result of collaboration between the Ballona Creek Watershed Task Force and the SMBRC. It is a plan that will explore issues related not only to short-term recreational improvements but also to longer-term restoration design possibilities. The Task Force is comprised of state and local agencies, environmental organizations, private businesses, and resident stakeholders.

Concurrently, SMBRC - with the aid of partner agencies such as the State Coastal Conservancy, Baldwin Hills Conservancy (BHC), Mountains Recreation Conservation Authority (MRCA), and City and County of Los Angeles - have embarked on the Lower Ballona Ecosystem Restoration Feasibility Study (LBERF) with the U.S. Army Corps of Engineers.

Stone Creek
UCLA and the University Lab School (ULS) campuses are conducting restoration efforts at Stone Creek which runs through the UCLA campus. Since 2007, the SMBRC has been working with support of the State Coastal Conservancy and the RWQCB to restore the stream with monthly volunteer weeding and planting events.
20 GLAC IRWM South Bay Subregional Plan
Dominguez Channel
The Dominguez Channel extends from the Los Angeles International Airport to the Los Angeles Harbor and drains large if not all portions of the cities of Inglewood, Hawthorne, El Segundo, Gardena, Lawndale, Redondo Beach, Torrance, Carson and Los Angeles. Dominguez Channel is in the Dominguez Watershed which is comprised of approximately 110 square miles of land in the southern portion of Los Angeles County. The remaining land areas within the watershed drain to several debris basins and lakes or directly to the Los Angeles and Long Beach Harbors. Because of the largely industrial land base in this watershed, very little native riparian vegetation remains. (RWQCB, 2008) Madrona Marsh
The Madrona Marsh Preserve, located in Torrance, is the last vernal marsh remaining in the South Bay Subregion. Ongoing efforts are restoring native plants including wildflowers and butterfly species. The area has long been popular with bird watchers and the Audubon Society has used Madrona Marsh for their annual bird census since 1967. El Camino College uses it as an outdoor biology and botany lab. Torrance operates the Madrona Marsh Nature Center in cooperation with the Friends of the Madrona Marsh. (Friends of Madrona Marsh, 2012)
Bixby Marshland
The Bixby Marshland is a remnant of a formerly extensive, natural-freshwater aquatic habitat known as Bixby Slough. Over the years, most of Bixby Slough was destroyed due to development. The Bixby Marshland, a 17-acre marsh, located to the northwest of the Sanitation Districts of Los Angeles County Joint Water Pollution Control Plant (JWPCP) near the intersection of Figueroa Street and Sepulveda Boulevard in the City of Carson, has recently been restored by the Sanitation Districts of Los Angeles County (SDLAC, 2012). Partial funding for this restoration eomer came from the Proposition 50 IRWM Grant Program.

Beach Bluff Restoration
Beach bluff restoration is underway at several locations within the Subregion. The Los Angeles Conservation Corps is working with at-risk youth to restore three acres of bluff habitat adjacent to a Youth Center at Dockweiler Beach. The site is a priority restoration site due to its proximity to other native plant habitat supporting the federally endangered El Segundo blue butterfly within the dunes just west of Los Angeles International Airport. The Palos Verdes Peninsula Land Conservancy (PVPLC) has implemented a number of nature preserves that will preserve beach bluff areas, including the Vicente Bluffs, Abalone Cove, Alta Vicente, and the future Ocean Trails preserves. (Palos Verdes Peninsula Land Conservancy, 2012)

2.6.3 Upland Habitat
Upland habitat that exists further inland serves as a linkage between aquatic habitats. Within the Subregion, these habitats include the Los Angeles Coastal Plain and the Santa Monica Mountains to the north. A majority of the coastal plain has been urbanized, which inhibits linkage between aquatic habitats. The small portion of the Santa Monica Mountains in the northern portion of the Subregion are by contrast mostly open space and free of development, but impacted by invasive species and water quality issues. (RWQCB, 2011) PVPLC has developed preserves in upland areas, including the following: Agua Amarga, Three Sisters, Upper Filiorum, Portuguese Bend, and San Ramon. In addition, Rolling Hills Estates has established the Linden H. Chandler Preserve and the George F. Canyon Nature Preserve, and San Pedro has established the Fuel Depot managed area and the White Point Nature Preserve. 21 GLAC IRWM South Bay Subregional Plan
4 Partnership and Multi-benefit Opportunities
Many agencies and other entities have successfully been working together for decades on many collaborative projects. For instance in this Subregion, the entire system of flood management, conservation of local water supply, and recreation is a longstanding set of activities and facilities that represents collaboration and integration among the Los Angeles County Flood Control District, West Basin MWD, the Water Replenishment District, other water agencies, LA County Dept of Parks & Recreation and others.

Projects that seek to enhance or extend these existing activities should be encouraged, because often they will be the most cost-effective.

Implementation of projects is the vehicle to meeting the objectives and planning targets discussed in Section

3. Integration and collaboration can help these projects achieve synergies and, at times, increase their cost- effectiveness in meeting multiple objectives. In addition to the collaboration described above, the GLAC IRWM Region will continue to build upon a wealth of potential multi-benefit project opportunities for partnership projects including:
• Local Supply Development: Alternative supply development such as distributed stormwater capture projects are often too costly for a water supply agency to construct on their own for water supply purposes only. The near-term unit cost can be well in excess of the cost of imported water.

However, partnerships often help to share the costs, thus providing opportunities for more complex, multi-benefit projects (such as water quality improvement) that otherwise might not be accomplished.
• Improving Stormwater Quality: In preparing this update of the IRWM Plan, a methodology to identify priority drainage areas based on their ability to improve water quality for the coastal and terrestrial waters was developed. Integrated projects that can provide water quality benefits can be cited relative to that prioritization to achieve the highest benefits. • Integrated Flood Management: Earlier studies, such as the Sun Valley Watershed Management Plan (2004), demonstrated the potential for similar cost-effective synergies between flood control, stormwater quality management, water supply, parks creation and habitat opportunities. Flood control benefits usually achieved through significant traditional construction projects can sometimes be accomplished with alternative multi-benefit projects. • Open Space for Habitat and Recreation: When habitat is targeted for restoration, there are often opportunities for cost-effective implementation of flood control, stormwater management and passive recreation (such as walking and biking trails) as well.

These benefit synergies and cost effectiveness outcomes can best be attained when the unique physical, demographic and agency service area attributes of the region are considered. In addition to existing collaborative processes, the GLAC IRWMP has developed the geodatabase tool to assist in identifying areas and partnerships conducive to both inter-subregional and intra-subregional integrated project development. This section discusses these tools as well as some preliminary analyses on the South Bay Subregion's potential partnerships and integrated project opportunities.

4.1 GLAC IRWMP Integration Process and Tools
As part of the objectives and targets update process, the GLAC Region compiled and developed several geo- reterenced data layers to assist in spatially identifying priorities and potential opportunities to achieve water supply, water quality, habitat, recreation and flood management benefits. These data layers were initially used individually to determine the objectives and planning targets for each water management 32 GLAC IRWM South Bay Subregional Plan
area. However, these datasets can also be overlaid to visually highlight areas with the greatest potential to provide multiple benefits. The resulting Potential Benefits Geodatabase (Geodatabase) can also align these areas relative to other layers containing agency service areas and jurisdictions - allowing for project proponents and partners to be identified.

Potential Benefits Geodatabase
The GLAC IRWMP Potential Benefits Geodatabase is a dynamic tool that should be updated as new data is made available in order to maintain its relevance in the IRWM planning context. However, in order to provide an analysis of potential integration and partnership opportunities for the 2013 GLAC IRWM Plan, current data layers were overlaid and analyzed. The key layers used are shown in Figure 14 and described in Table 11. It should be noted that these datasets may not be complete or in need of further refinement and therefore will be updated on an as-needed basis - which is part of the dynamic process previously described. Therefore, the Geo-database should only be used as an initial step in identifying multi-benefit potential and by no means used to invalidate the potential for achieving benefits in other areas.

Figure 14: GLAC Region Potential Benefits Geodatabase Layers Supply Existing and Potential Water Reclamation
Supply Recharge Areas
Flood Special Flood Hazard Areas
Habitat Historical and Current
Terrestrial Aquatic
ZA Recreation: High Priority
Water Quality
High Priority (4-5)
Medium Priority (2-3)
Using the Geodatabase
The Geodatabase is a dynamic visual tool. The data layers and maps shown in this Section are only some of a multitude of ways to package and view the datasets to help with the integration process. It is important to note that not all data that could be useful in identifying integration and partnership potential for the region is easily viewed spatially in this format. ThereforeTherefore, the Geodatabase should only be used as one of several potential integration tools or methods.

The Geodatabase can also be used to identify the potential for further integration between existing projects included in an IRWMP. Currently the GLAC Region has web-based project database (OPTI) that 33 GLAC IRWM South Bay Subregional Plan
References
Bay Restoration Foundation, 2011. Ballona Wetlands.
http://www.santamonicabay.org/ballonarestoration.html
Beverly Hills, City of, 2011. 2010 Urban Water Management Plan.

City of Santa Monica, April 12, 2017. Summary of Perchlorate Contamination in Santa Monica Basin.

Friends of Madrona Marsh, 2012. Explore the Marsh.
http://www.friendsofmadronamarsh.com/j/index.php?option=com content&view-category&layo ut=blog&id=34&Itemid=53
Los Angeles, City of, 2011. 2010 Urban Water Management Plan.

Los Angeles County Department of Regional Planning (LACDRP), 2011. Los Angeles County General Plan 2035. Public Review Draft.

Metropolitan Water District of Southern California (MWD), 2010. Integrated Regional Plan.

MWD, 2007. Groundwater Assessment Study. Report Number 1308. http://www.mwdh2o.com/mwdh2o/pages/yourwater/supply/groundwater/GWAS.html Palos Verdes Peninsula Land Conservancy, 2011. Restoration and Land Stewardship. http://www.pvplc.org/_lands/stewardship.asp
Regional Water Quality Control Board - Los Angeles Region (RWQCB), 2011. State of the Watershed - Report on Water Quality, The Santa Monica Bay Watershed Management Area. 2nd Edition.

RWQCB, 2011b. Shapefiles of Permitted Storm Sewer System (MS4) Discharges, Industrial General Discharges, and Caltrans Discharges.

RWQCB, 2008. State of the Watershed - Report on Surface Water and Sediment Quality, The Dominguez Channel and Los Angeles/Long Beach Watershed Management Area. November.

Sanitation Districts of Los Angeles County (SDLAC), 2012. Bixby Marshland. http://www.lacsd.org/wastewater/wwfacilities/jwpcp/bixbymarshland.asp SDLAC, 2010. Machado Lake Ecosystem Rehabilitation Project and Wilmington Drain Multi-Use Project. http://www.lacitysan.org/wpd/Siteorg/LAPropO/sitefiles/Machado/machadointro.htm Santa Monica, City of, 2011. 2010 Urban Water Management Plan.

State Water Resources Control Board (SWRCB), 2010. 2010 Integrated Report (Clean Water Act Section 303(3) List / 305(b) Report) - Statewide.
http://www.waterboards.ca.gov/water_issues/programs/tmdl/integrated2010.shtml Southern California Association of Governments (SCAG), 2012. Adopted 2012 RTP Growth Forecast. http://www.scag.ca.gov/forecast/index.htm
Torrance, City of, 2011. 2010 Urban Water Management Plan. 38 APPENDIX L
L. Upper Los Angeles River Subregional Plan
Upper Los Angeles River
Subregional Plan
Final
Prepared by:

RMC
Water and Environment
In Association with:

Geosyntec®
consultants
Amended October 2017
GLAC IRWM Upper Los Angeles River Subregional Plan
Lincoln Park Lake
Nutrients: Ammonia, Eutrophic, Organic Lincoln Park Lake TMDLs Enrichment/Low Dissolved Oxygen, Odor
Trash
Lead No TMDL necessary as lead determined to be
meeting numeric targets

1. According to the US EPA's 2010 Integrated Report (Clean Water Act Section 303(d) List / 305(b) Report Table 7: 303(d) Listed Waters without Approved TMDLs
303(d) Listed Waters and Impairments'
Arroyo Seco
Benthic-Macroinvertebrate Bioassessments
Burbank Western Channel
Cyanide
Los Angeles River
| Oil

1. According to the US EPA's 2010 Integrated Report (Clean Water Act Section 303(d) List / 305(b) Report Groundwater Quality
Groundwater quality in the ULARA Basins is managed by the ULARA Watermaster which reports on water quality, treatment and remedial investigation activities in its annual report. The overall quality of the ULARA Sasıns is generally within the recommended limits of drinking water standards, except for those areas of concen isted in Table 8. Groundwater pumped from these areas (for those wells that haven't been shut down) ar treated to meet state drinking water standards.

Within the San Fernando Valley, three Operable Units (OUs) have been created as part of long-term groundwater mediation activities in the san rernando Basın.
due to VOCs. Various groundwater quality investigations are also taking place throughout the ULARA Basins to determine the cause and extent of the above listed contamination.

Table 8: Groundwater Quality Concerns in the ULARA Basins Basin Area Water Quality Concern
San Fernando Basin - eastern portion TCE, PCE, hexavalent chromium, nitrate San Fernando Basin - western portion Sulfate, TDS
Verdugo Basin MTBE, nitrate
Sylmar Basin nitrate
Raymond Basin groundwater quality is managed by the Raymond Basin Management Board. This basin provides potable supply, with good to fair groundwater quality in most areas. Constituents of concern include TDS, nitrate, perchlorate, and VOCs. There is one Superfund site located at the Jet Propulsion Laboratory (JPL) due to liquid waste seepage which released perchlorate and VOCs into the groundwater. Water agencies which pump from the Raymond Basin have treatment facilities in place to treat groundwater for VOCs and Perchlorate.

Within the ULAR Subregion (San Fernando, Sylmar and Verdugo Basins), nitrate and hexavalent chromium contamination are known to be prevalent. As of June 2017, there are no known impacts to communities, as mitigation is currently underway. Water agencies that pump water must be compliant with all drinking water regulations.

Currently, a number of efforts between City of Los Angeles, City of San Fernando, City of Burbank, City of Glendale, and Crescenta Valley Water District are underway to treat groundwater contamination. Figures 11, 12, and 13 show maps of hexavalent chromium and nitrate contamination in the Eastern Portion of the San Fernando Basin.
21 GLAC IRWM Upper Los Angeles River Subregional Plan
Figure 11: Easter San Femando Valley - Hexavalent Chromium (Cr6) Contamination Groundwater Plume Map Legend
Cro Concentration

21.002 w0z
100-106
50-100 pa-
10-50 pal
Wets with Cre Cata
Cra Data Prora 2510
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OU Exaction Vietis
The almen| PLet
• Aves Bouncares
Ross
• Strewns
] Groundwater Basn Boundary
Los Angeles River
- Urined
The U S EPA has released this contaminant plume map to update the public on ine currentstatus ofte san remando valley supenun ground water site Hexavalent Chromium (Cr6)
This man is not intended forensee pro a sa ma Contamination in Groundwater (Most Recent Concentration
Jan 2010 - Sept 2014)
Contaminants of Concam in
Esstem Son Fernando Valey
LOTTE
24 GLAC IRWM Upper Los Angeles River Subregional Plan
Figure 12: Eastern San Fernando Valley - Hexavalent Chromium (Cr6) Contamination Groundwater Plume Map Legend
Cr6 Concentration
·1.000 KG
100-1.000 Ng/L
50-00pg
10-50 pg4
5-10 pp
1] 1-5002
/ 05-1 pg2
Wets win Cro Data
Cid Data Prior to 2010
LADWP Production Wets
OU Extraction Wells
Ara Boundaries
• • Freeways
Roads
→ Rubsad
• Greams
Groundmater Busin Boondary
Los Angeles River
Santa Monica Mountains
The U S EPA has released this contaminant plume map to update the public on the current status of the San Femando Valley Superfund groundwater site Hexavalent Chromitin (Cr6)
Contamination in Groundwater
(Most Recent Concentration
Jan 2010 - Sept 2014)
Contaminants of Concem in
Eastem Son Fernando Valley
LOTTE
24 GLAC IRWM Upper Los Angeles River Subregional Plan
Figure 13: Eastern San Fernando Valley - Nitrate Contamination Groundwater Plume Map LEGEND
NC, Conc. >45 mg/
(Sarce: USEPA)
Verduga
Mountains Primary Streams
Secondary Stroams
00222 Los Angales Rivor
Sproading Grounds
ULARA Watershod
San Rafael Groundwater Basins
Hills
San Fernande
Vardugo
Eaglo Rock
Santa Monica
Mountains
•Tra sees ef cerammason shown on this mao represert earpized two-omans oat sook masons baske aer quatty analyay tom Rl Mondra Weis. Facity Word and Procuction Weis whate the the screene- tess we stud tota
2 Due lo the possible vertical zoraton of contaminaton. a twin an identical area of contamnat on may produce vater win contaminaton dilent than tat ndtold on hia mac AraM often ale i hate all mat to sed nate towels ernie
10000 10000 Feet
2013-14 Water Year PLATE
ULARA Watermaster Upper Los Angeles River Area:

Report NO, Contamination (mg/L) in Shallow Zone 2010 16 25 APPENDIX M
M. Upper San Gabriel River and Rio Hondo Subregional Plan Upper San Gabriel River and Rio
Hondo Subregional Plan
Final
Prepared by:

RMC
Water and Environment
In Association with:

Geosyntec®
consultants
Amended October 2017
GLAC IRWM Upper San Gabriel River and Rio
Hondo Subregional Plan
Groundwater Quality
Groundwater quality in the San Gabriel Basin (which includes all basins discussed in the Groundwater Supply section except for Raymond Basin and Six Basins) is managed by the Main San Gabriel Basin Watermaster (Watermaster) under its authority from the court. The Watermaster administers the Main San Gabriel Basin Judgment and enforces its provisions which establish water rights and responsibility for management of quantity and quality of the groundwater. They review and adopt their "Five-Year Water Quality and Supply Plan" each year. In addition, the San Gabriel Basin Water Quality Authority (WQA) was created by the state legislature to promote improvement of groundwater quality in the San Gabriel Basin. Their Basin-wide Groundwater Quality Management and Remediation Plan is reviewed and adopted annually. This plan includes all projects that the WQA is facilitating, and identifies various funding sources to ensure full funding for each project. The San Gabriel Valley's groundwater basin has water quality issues across the basin that are being addressed by WQA projects with a focus on 1) accelerating removal of contaminant mass in the basin, 2) preventing migration of contamination into critical groundwater supplies, 3) integrating cleanup with water supply, and 4) minimizing economic impact to the public.

One of the primary constituents of concern in the groundwater basins of the Subregion is volatile organic compounds (VOCs) which are used primarily in industrial and commercial activities. Over time, VOCs have leached into the groundwater from ground disposal of chemicals. Additionally, the basins has-have been found to have high levels of NDMA, nitrate, perchlorate, and TDS, primarily caused by industrial and commercial activities. Also, hexavalent chromium, arsenic, and radon have been detected as well.

Groundwater quality specific to each basin will be discussed below.

Water pumped from the Main San Gabriel Basin is used as potable supply. Though water quality is good in most areas, constituents of concern for the Main San Gabriel Basin include high TDS, nitrate, VOCs, perchlorate, and NDMA. Hexavelent chromium has also been detected at low levels. Due to industrial and commercial contamination, five Operable Units (OUs) have been defined by the US EPA's Superfund Program: Baldwin Park OU, El Monte OU, Puente Valley OU, Whittier Narrows OU, and Area 3 OU.

Each of these OUs has a specific plan laid out to address contamination remediation. SeveralMany treatment facilities are in place to treat groundwater pumped out of this basin. (San Gabriel Basin Water Quality Authority, 2012)
The Puente Basin underlies an area in the south east portion of the Subregion and is managed by the Puente Basin Watermaster. Puente Basin groundwater is used as a non-potable supply due to its poor quality, and is used for blending with recycled water, construction water and irrigation. Constituents of concern include TDS, Nitrate, hexavalent chromium, and VOCs. Remediation is underway to remove VOCsaddress these contaminants in the US EPA's Puente Valley Operable Unit which is located in the western portion of the basin. (MWDSC, 2007) Six Basins has varying water quality, much of which can easily be considered potable through blending or other simple remediation efforts. Primary constituents of concern include nitrate, perchlorate and VOCs. Some areas also have high levels of arsenic and radon. Several of the pumpers in Six Basins treat the groundwater for these contaminants. New projects to offset the shutdown of wells due to water quality have been considered and studies are being completed to determine a means of improving this area's groundwater quality. (MWDSC, 2007) The Raymond Basin underlies the north-western portion of the Subregion and is managed by the Raymond Basin Management Board. This basin provides potable supply, with good to fair groundwater quality in most areas. Constituents of concern include TDS, nitrate, perchlorate, and VOCs. There is one Superfund site located at the Jet Propulsion Laboratory (JPL) due to liquid waste seepage which released perchlorate and VOCs into the groundwater. Water agencies which pump from the Raymond Basin have treatment facilities in place to treat groundwater for VOCs and Perchlorate. (MWDSC, 2007) This basin is an unmanaged basin primarily used as a non potable supply due to water quality issues. Constituents of concern include nitrate and TDS. Perchlorate and VOCs have also been detected in the basin.
21 APPENDIX O
O. Climate Change Vulnerability Exercise
Appendices I

GLAC-IRWMP
Climate Change Vulnerability Exercise
The GLAC IRWM Climate Change Subcommittee conducted an exercise to answer-a vulnerability questions assessment aligned with taken from Box 4-1 of the Climate Change Handbook and associated the answers with concerning potential water management issues/vulnerabilities. Table 1 summarizes the analysis and was updated based upon the latest local climate research within the Los Angeles region. Qualitative vulnerability questions are framed to help assess resource sensitivity to climate change and prioritization of climate change vulnerabilities within a region.

Answers to vulnerability questions are given for the GLAC Region with local examples provided as justification for the answer.

RMC, page
Table 1: Climate Change Vulnerability Indicator Questions Vulnerability Question Answer Justification Vulnerability Water Demand
Are there major industries that require Oil companies in southern harbor areas primarily use Industrial demand would cooling/process water in your planning recycled water for cooling. Scattergood plus other OTC increase: increased cooling region? power plants use ocean water for cooling but OTC Policy needs due to higher moving plants off OTC. Aerospace industry needs temperatures cooling water, but is considered to be downsizing its
presence in the Region.

Are crops grown in your region climate- There are some small-scale farming plots but no major Agricultural demand would sensitive? Would shifts in daily heat agriculture. Nurseries may be vulnerable, but uncertain if increase: evapotranspiration will patterns, such as how long heat lingers decreasing in size. increase per unit of biomass before night- time cooling, be prohibitive due to higher temperatures for some crops?
Do groundwater supplies in your region Groundwater basins are relatively large in size and have Lack of groundwater storage: to lack resiliency after drought events? replenishment requirements. During the last drought, buffer drought conditions however, Main San Gabriel Basin levels were in their
lower range, but still had opportunity to recharge. The recharge potential of the Region's basins has not been
fully realized and it is critical to further increase recharge so as to offset imported supply and provide longer term and seasonal storage.

Are water use curtailment measures Demand has decreased as a result of conservation Decrease ability to meet effective in your region? programs. Region is already concerned about meeting conservation goals: due to 20% by 2020 potable use reduction, even without climate saturation conservation change effects. programming or inability to
conserve further
Does water use vary by more than 50% Current climate requires a strong peak in summer Limited ability to meet higher seasonally in parts of your region? demand for irrigation. peaks in demand (both seasonally and annually):
infrastructure sized to only
existing demand peaks.

Are some in-stream flow requirements The Regional Board requires Tapia WRF to discharge to Habitat demand would in your region either currently Malibu Creek when minimum flow criteria are met to increase: exacerbated by insufficient to support aquatic life, or provide sufficient aquatic habitat. However, climate decreased flows, which are occasionally unmet? change may increase vulnerability. already challenging No specific question called out in Increasing population in areas of Region that will have Municipal demand would handbook - but vulnerability issue was higher temperatures and lower precipitation as a result of increase: exacerbated by identified independently. climate change. Older development is in cooler and drier distribution of population parts of the region while more recent development and increases current development pressure is in hotter and drier areas.

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Vulnerability Question Answer Justification Vulnerability Issue Water Supply
Does a portion of the water supply in Some The local supply comes from snowmelt in the San Minimal Decrease in local your region come from snowmelt? Gabriel Mountains is generally negligible and annual surface supply: Due to rainfall is the key indicator for the health of the local water decrease in local snowpack supply.

Does part of your region rely on water Large portion of the Region's supply comes from Decrease in imported supply:
diverted from the Delta, imported from imported water (both direct uses and replenishment). Due to decreases in SWP and the Colorado River, or imported from Colorado supplies
other climate-sensitive systems outside
your region?
Would your region have difficulty in Large system of groundwater basins allows the Region to Decrease in seasonal water storing carryover supply surpluses from store seasonal and annual supply in basins, but can only reliability: given recharge year to year? capture so much from storms given limited recharge facilities and decreases in local facility area available Other parts of the Region without and imported surface supply groundwater basins have limited or no capacity to carry over supply surpluses.

Does part of your region rely on coastal Santa Monica and West Coast Basins have salt water Decrease in coastal aquifers? Has salt intrusion been a intrusion issues. Seawater intrusion barriers have groundwater supply: due to sea problem in the past? operated since 1950s to mitigate these impacts, however level rise increasing intrusion SLR will further exacerbate the current situation.

Has your region faced a drought in the There have been droughts in the Region where normal Reduced resiliency to drought:
past during which it failed to meet local demands were not able to be met so drought Increased need for rationing and water demands? management plans were implemented to reduce other drought response demands to be more in-line with available supplies. In this way demands were met.

Does your region have invasive species Arundo, quagga mussels (aqueducts) have been Invasives can reduce supply management issues at your facilities, detected and could increase -already decreasing available: Increased invasives along conveyance structures, or in infrastructure reliability as well as alter flood regimes and leads to increased water habitat areas? alter wildfire regimes. consumption (and flood and wildfire regimes)
Water Quality
Are increased wildfires a threat in your The 2009 Station fire and others caused great damage Increased erosion and region? If so, does your region include and sedimentation issues from large increases in sedimentation: leads to reservoirs with fire-susceptible erosion. decreased water quality, vegetation nearby which could pose a available supply
water quality concern from increased
erosion?
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Vulnerability Question Answer Justification Vulnerability Issue Does part of your region rely on surface Many of the Region's local surface waters are 303(d) Increased nutrient loading and water bodies with current or recurrent listed for nutrient issues decreased Dissolved Oxygen:
water quality issues related to
eutrophication, such as low dissolved had to decreed water quality oxygen or algal blooms? Are there
other water quality constituents
potentially exacerbated by climate
change?
Are seasonal low flows decreasing for Most streams in the region are naturally ephemeral or Decreased dilution flows: to some water bodies in your region? If intermittent. For example, some streams that were once help dilute contaminants so, are the reduced low flows limiting intermittent are now perennial after being channelized to the water bodies' assimilative capacity? a depth below the summer water table. Natural streams may have decreased flow, but the only gauged streams
are those with significant anthropogenic alteration in
upstream watersheds. Seasonal low flows in effluent
dependent water bodies are decreasing given
conservation and recycled water use.

Assimilative capacity is already compromised since
normal dry season flows are low. Any amount of
pollutants added to small volumes of water during low
flow will have a proportionally large effect.

Are there beneficial uses designated for There are many beneficial uses in the Region which are Decrease in recreational some water bodies in your region that not being met. For example, beach closures and fishing opportunity: from poor water cannot always be met due to water restrictions have occurred in the past. quality quality issues?
Does part of your region currently Some areas that treat local surface water have issues with Increase in source control or observe water quality shifts during rain turbidity and first flush contaminant levels during high flows. surface water treatment: for events that impact treatment facility High intensity storms can also disrupt biological wastewater surface waters to meet operation? or stormwater treatment processes that may affect increases in contaminants minimum standing time and discharge water quality
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Vulnerability Question Answer Justification Vulnerability Issue Sea Level Rise
Has coastal erosion already been Malibu, Santa Monica, and Palos Verdes areas Decrease in land: From observed in your region? erosion along coasts
Are there coastal structures, such as Marina areas and ports have breakwaters.; the Ballona Damage to coastal levees or breakwaters, in your region? Creek channel outlet is a levee. infrastructure/recreation/ Is there significant coastal > Examples of areas at risk due to SLR include wastewater tourism: Due to sea level rise infrastructure, such as residences, treatment (e.g. Hyperion, Terminal Island), stormwater recreation, water and wastewater outfalls at beaches, beach recreation features, also treatment, tourism, and transportation) potential for planned desalination facilities. Residences at less than six feet above mean sea (including DACs) and other non-water-related level in your region? infrastructure/recreation are also at risk along coastal areas of the Region.

Is there land subsidence in the coastal Nothing prevalent known areas of your region?
Are there areas in your region that The FEMA definition of flooding includes coastal wave currently flood during extreme high uprush. There have been flooding events along the coast tides or storm surges? when high tides and storm surges coincide, generally during El Nino events.

Are there climate-sensitive low-lying
coastal habitats in your region? Ballona Wetlands and Malibu Lagoon are examples. Damage to ecosystem/ habitat:

Due to sea level rise
Do tidal gauges along the coastal parts There have been documented increases, however, this No issue just indicates that of your region show an increase over just indicates that climate change is occurring but is not a climate change is happening the past several decades? vulnerability issue.

Flooding
Does critical (water/wastewater) Assuming yes Increases in inland flooding infrastructure in your region lie within
the 200-year floodplain?
Does aging critical flood protection Sarg Appendix G Flood Management Objectives and infrastructure exist in your region?
Have flood control facilities (such as Regionally there has generally been sufficient protection, impoundment structures) been but there is still some localized flooding. Debris basins insufficient in the past? have been insufficient in the past (O&M issue) and caused debris flows. Long Beach, San Pedro Sun Valley
are example areas with inland flooding issues.

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Vulnerability Question Answer Justification Vulnerability Issue Are wildfires a concern in parts of your Annual occurrence of wildfires Increases in flash flooding and region? debris flows
Does part of your region lie within the Not applicable No issue since it is out of Sacramento-San Joaquin Drainage Region
District?
Ecosystem and Habitat
Does your region include inland or Ballona Wetlands, and Malibu Lagoon other riparian areas Increased impacts to habitat coastal aquatic habitats vulnerable to and flow availability for species:
erosion and sedimentation issues? from various current issues and Does your region include estuarine Malibu Lagoon and Ballona Wetlands are examples those associated with climate habitats which rely on seasonal change
freshwater flow patterns?
Do climate-sensitive fauna or flora Numerous species dependent upon the Mediterranean populations live in your region? climate live in the Region Are there rivers in your region with Los Angeles River does not yet have flow requirements quantified environmental flow but could have them in the future - however there are requirements or known water current stressors on aquatic life. There are minimum flow quality/quantity stressors to aquatic requirements to sustain steelhead trout habitat in Malibu life? Creek that trigger a requirement to discharge recycled water each summer.

Do endangered or threatened species A number of endangered and threatened species exist in exist in your region? Are changes in the Region. The Region is the southern limit to species distribution already being endangered southern steelhead trout; climate change observed in parts of your region? could alter their extent.

Beach tourism, creeks and lakes recreation, creek
Does the region rely on aquatic or riparian habitat and river adjacent trails water- dependent habitats for
recreation or other economic activities?
Are there areas of fragmented The Region has natural aquatic habitat areas that are estuarine, aquatic, or wetland wildlife severely fragmented by channelization, impassible habitat within your region? Are there culverts and lost riparian areas. There are some movement corridors for species to corridors, but no new known infrastructure projects are naturally migrate? Are there planned that would further fragment aquatic habitat. infrastructure projects planned that
might preclude species movement?
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Vulnerability Question Answer| Justification Vulnerability Issue Do estuaries, coastal dunes, wetlands, Not frequent storms but there are exposed beaches Decrease in habitat protection marshes, or exposed beaches exist in and habitats that are at risk during El Nino storm against coastal storms. your region? If so, are coastal storms events.
possible/frequent in your region?
Does your region include one or more None listed.
of the habitats described in the
Endangered Species Coalition's Top 10
habitats vulnerable to climate change?
Hydropower
Is hydropower a source of electricity in Small hydropower projects Decrease in hydropower your region? potential.

Are energy needs in your region Y, N No future known plans for hydropower generation expected to increase in the future? If so,
are there future plans for hydropower
generation facilities or conditions for
hydropower generation in your region?
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APPENDIX I
P. Other Planning Documents (October 2017)
Appendix P. Planning Documents (Sept. 2017)
SUB-REGION Plan Name IRWMP Incorporation
Lower San Gabriel 1. Los Angeles River Upper Reach 2 Watershed Management 10/23/2016 & Los Angeles Plan
River

2. Gateway Integrated Regional Water Management Plan 02/22/2017

3. Los Cerritos Channel Watershed Management Plan 10/25/2017

4. Lower Los Angeles River Storm Water Resource Plan 10/25/2017

5. Long Beach Nearshore Stormwater Resource Plan 10/25/2017 Lower San Gabriel River Storm Water Resource Plan 10/25/2017 North Santa Monica 7. Malibu Creek Watershed Stormwater Resource Plan 10/23/2016 Bay

8. North Santa Monica Bay Coastal Watersheds Enhanced 10/23/2016 Natershed Management Program / Stormwater Resource
Plan
South Bay 9. Dominguez Channel Enhanced Watershed Management 10/23/2016 Program Stormwater Resource Plan

10. Ballona Creek Enhanced Watershed Management Program 10/23/2016 Stormwater Resource Plan

1. Sanagement Program stormvate Resource la Watershed 10/23/2016

12. Palos Verdes Peninsula Watershed Management Group 10/23/2016 Resource Wanershed Management Program Stormwater

13. Beach Cities Enhanced Watershed Management Program 10/23/2016 Stormwater Resource Plan

14. Machado Lake Watershed Enhanced Watershec 10/23/2016 Management Plan

15. Marina Del Rey Watershed Enhanced Watershed 10/23/2016 Management Program Plan
Upper Los Angeles 16. Los Angeles Stormwater Captures Master Plan 10/23/2016 River

17. Upper Los Angeles River Enhanced Watershed 10/23/2016 Management Plan
Upper San Gabriel 18. East San Gabriel Valley Watershed Management 10/25/17 and Rio Hondo Stormwater Resource Plan

9. Rio Hondo/San Gabriel River Enhanced Watershe 10/23/2016 lanagement Program Stormwater Resource Pla

0. Upper San Gabriel Enhanced Watershed Managemen 10/23/2016 rogram Pla