TRANSM!TTAL - Los Angelesclkrep.lacity.org/onlinedocs/2011/11-0575-S1_rpt_cao_10-25-12.pdf ·...

0220-03994-0030 TRANSM!TTAL

TO DATE COUNCIL FILE NO.

The City Council 10/25/2012

FROM COUNCIL DISTRICT

City Administrative Officer

Proposition 0 Constructed Projects- Startup and Optimization Phase

Please find attached a report dated August 13, 2012 by the bureaus of Sanitation and Engineering for your consideration. We concur with the implementation of an optimization phase for completed Proposition 0 (Prop 0) projects to ensure that project elements are in an optimal working manner to maximize intended water quality benefits. The optimization proposal has been reviewed extensively at the City staff level and in the Prop 0 Citizens Oversight Advisory and Administrative Oversight committees. Optimization is acknowledged to be an eligible expense under Prop 0.

MAS:ER:06130043t ~C~A~0~6~49~~d~~~~-----------------------------·-------------------------------~

Currently, there are eleven (11) Prop 0 projects that have already been constructed by Bureau of Engineering Project team. Upon construction, the projects require an "optimization period" to ensure that the project elements are in an optimal working manner to assist in meeting water quality requirements. The optimization phase is a routine protocol that the City and other agencies use in all the programs under its direction, namely, the Wastewater, Stormwater, and Solid Resources Programs. The Prop 0 projects are the first of their kind in the City and the optimization period is an important phase for long-term project sustainability. It is during this phase that a balanced approach between water, air, and plants elements is established. LA Sanitation has worked with the Bond Counsel and received a memo confirming that optimization expenditures are a capitalizable cost that is payable by Prop 0 (please refer to the Bond Counsel Memo attached as Attachment No. 2).

For the projects that have been constructed, it is imperative to commence the optimization phase of these projects to ensure that these Prop 0 investments meet the expected outcome by the voters which is improved water quality. Accordingly, Bureau of Engineering and LA Sanitation recommend starting up the optimization phase for the completed Prop 0 Projects immediately. A template for each of the completed project was prepared showing the activities that ought to be optimized in each project. Bureaus of Engineering and Sanitation believe that the optimization phase is best achieved through our City staff. Specialty services will argument the City staff on as needed basis for specialized work. It is through the optimization phase that the physical, chemical, and biological characteristics of green projects will be examined and proper protocols will be established for the Prop 0 project long term sustainability.

The attached Optimization Files (Attachment No. 3) provide the scope and budget for each of the completed Prop 0 projects. A summary of that is presented in the below as follows:

No. Project Name

4. I Peck Park Canyon Enhancement ' ·· ·· ... -I.'Hailsen 6am wetlands ....

5· ...... l R.~~tgr~tioll

6. Grand Blvd Tree Wells ..... ·····- ....... ------ .. .. .... . . .. -~--- -"~-~- -

Imperial HWY Sunken Median Stormwater BMP . ~ --------~--., ....... ,,,.,,_, _______________________ ... .

Westminster Dog Park Stormwater BMP

2

Scope and Schedule

• Wetlands- Two Years -~nco"" ''''••'''''' ''''''''' '''"' "~

: Bio-Treatment- Two ·Years

Bio-treatment and infiltration- Two Years Blo-Treatment-Two Years

$162,000

$225,000

$197,000

$172,000

$74,820

$208,500

$78,900

9.

10.

11 ·-~----- ---

Total

RECOMMENDATIONS

.... , ~ .. - """ -"· . Bioswales and treatment -Two Years Rainwater Capture and Use- Two Years

- -- - - --- -- ----·- --" -

Trash Capture -Two Years

$60,300

$257,500

$435,600

$2,172,620

(1) Authorize the Bureau of Sanitation (LA Sanitation), in coordination with the Bureau of Engineering, to commence the optimization phase in FY 12-13 and continued through FY 13-14, for each completed Proposition 0 projects.

(2) Authorize the transfer of un-appropriated remaining budget from the Catch Basin Screen Phase Ill Project in the amount of $1,922,620 to LA Sanitation salary and related costs accounts for each FY 12-13, to unfreeze and fund fourteen (14) FTEs from LA Sanitation's existing vacant authorized positions (FTEs classification attached as Attachment No. 1) to staff the optimization effort for the Proposition 0 completed projects. Continue the funding for the same fourteen (14) positions in FY 13-14.

(3) Authorize the transfer of un-appropriated remaining budget from the Catch Basin Screen Phase Ill Project to LA Sanitation in the amount of $250,000 to a Project Optimization Contractual Services account for each FY 12-13 and FY 13-14, to fund specialized optimization activities such as, risk assessment, biological health assessment of wetlands, monitoring of physical, chemical, and biological characteristics of completed projects.

We respectfully request that you take immediate action on this important item. If you have any questions or wish to discuss this matter further, please contact Shah ram Kharaghani at (213) 485-0587, Kendrick Okuda at (213) 485-1165, respectively.

Attachments SK\WT/LA:Ia

cc: Andrea Alarcon, President, Board of Public Works Adel Hagekhalil, BOS Ken Redd, BOE Barry Berggren, 80S Brian McCormick, BOS Kendrick Okuda, BOE David Hirano, CAO Emilio Rodriguez, CAO Shahram Kharaghani, BOS Wing Tam, BOS

3

Attachment 2

NIXON PEABODY~LP

TO: City of Los Angeles

FROM: Nixon Peabody LLP

DATE: January 19, 2011

RE: Permitted Use of Proposition 0 General Obligation Bond Proceeds

Memorandum

Question Presented

May the City of Los Angeles (the "City") use proceeds of Proposition 0 general

obligation bonds to pay for consultants and other costs during the Optimization Period of the

Natural Solution Projects (defined below)?

Summary of Conclusion

Yes, the City may use Proposition 0 general obligation bond proceeds to pay for

consultants and other costs during the Optimization Period of the Natural Solution Projects.

Background

On November 2, 2004, voters of the City passed Proposition 0, authorizing the issuance

of up to $500 million of general obligation bonds for projects to protect public health by cleaning

up pollution, including bacteria and trash, in the City's rivers, lakes, beaches and ocean, in order

to meet Federal Clean Water ACt requirements. Proposition 0 authorizes proceeds to be used for

the purchase and/or improvement of property for projects that:

protect rivers, lakes, beaches and the ocean;

conserve and protect drinking water and other water sources;

13311374.2

reduce flooding and use neighborhood parks to decrease polluted runoff; and

capture, clean up and reuse storm water.

A number of the Cir/s Proposition 0 projects use natural solutions as a strategy for

meeting its storm water runoff mandates. Natural solution projects rely heavily on a balance of

storm water runoff, plant life and oxygen to remove pollutants from storm water. runoff (the

"Natural Solution Projects"). The efficacy of these Natural Solution Projects depends on a two

year post construction establishment and stabilization period followed by a perpetual and routine

operation and maintenance protocol. The establishment and stabilization period allows for the

natural processes to be optimized by establishing the optimal balance between plant life, the

amount of runoff and the amount of oxygen, and a mechanical system to deliver the runoff at the

optimal time and amount (the "Optimization Period").

Analysis

Section l(a) ofArticle XIIIA of the California Constitution provides that the maximum

amount of any ad valorem tax on real property shall not exceed one percent. There is an

exception to the one percent limitation for bonded indebtedness for the acquisition or

improvement of real property approved by two-thirds of the voters voting on the proposition.

See Cal. Const., Art. XIIIA, § l(b)(2) (emphasis added). Similarly, the Proposition 0 ballot

information states that Proposition 0 authorizes the use of general obligation bond proceeds for

the purchase and/or improvement of property. The analysis of whether consultants and other

costs during the Optimization Period are a permitted use of Proposition 0 general obligation

bond proceeds rests on whether the Optimization Period activities can be considered an

acquisition or improvement of real property.

l33!13R2 2

After considerable research, we have been unable to find any legal authority directly on

point. However, it seems clear that the Optimization Period activities involving adjustments to

plant life, aeration and runoff flow all improve the functioning of the parcels of real property

serving as Natural Solution Projects. These activities alter the character of the parcels of land to

make them better able to perform their function in treating storm water rurioff. The American

Heritage Dictionary of the English Language defines "improve" as "1. To make or become

better. 2. To increase the productivity or value of land." Under this definition the Optimization

Period activities clearly constitute "improvement of real property."

You have informed us, and we have assumed for purposes of our analysis, that the costs

of the Optimization Period activities are properly capitalized under applicable generally accepted

accounting principles. Such accounting treatment reinforces our view that such activities add to

and increase the value of the parcels of real property that make up theN atural Solution Projects.

The Optimization Period activities are in this way distinguishable from the perpetual and routine

operation and maintenance protocol that occurs after the Optimization Period, the costs of which

are not capitalized.

Our view of these issues is buttressed by the California Debt and Investment Advisory

Commission's ("CDIAC") California Debt Issuance Primer ("CDIAC Primer"). 1 "The CDIAC

Primer indicates that "labor costs, professional fees (such as contractors, architects, real estate

appraisers, and brokers), real estate closing costs, and other costs directly connected to real

property acquisition and improvement are probably also appropriately financed from general

obligation bonds." (emphasis added) We believe the facts in our case enable a stronger

1 The CDIAC Primer is a general guide to public debt financing in California. The CDIAC Primer discusses the principal parties in a debt financing, describes the major types of debt instruments and summarizes major state constitutional provisions affecting public finance. The latest version of the CDIAC Primer is dated March 2006. Updates to the CDIAC Primer can be found at www.treasurer.ca.gov/cdiac.

13311374.2 3

conclusion. In our case, the Optimization Period activities are a vital part of the stabilization,

viability and efficacy of the Natural Solution Projects that remove pollutants from storm water

runoff. Consultants and other costs are necessary during the Optimization Period to monitor and

adjust the processes. We believe such costs are directly connected to the improvement of real

property. We conclude that payment of consultant fees and other Optimization Period costs are

permitted uses of Proposition 0 general obligation bond proceeds on the Natural Solution

Projects authorized under Proposition 0.

We did not find any legal authority that contradicts CDIAC's interpretation of what can

be considered as "improvement of real property." Absent any direct legal authority on this issue,

courts often consider agency interpretation. See Yamaha Corp. of America v. State Bd. of

Equalization, 19 Cal. 4th 1, 7 (1998) ("Yamaha"). The Yamaha court held that although courts

must independently judge the text of a statute, "an agency's interpretation is one among several

tools available to the court. Depending on the context, it may be helpful, enlightening, even

convincing." ld. at 7~8. The Yamaha court notes that judicial deference to an agency's

interpretation is situational and depends on a number of factors including the particular agency

offering the interpretation. Id. at 12. CDIAC is the primary agency involved in public debt

financing in California, created to serve as California's clearinghouse for public debt issuance

information and to assist state and local agencies with the monitoring, issuance, and management

of public debt. We believe that CDIAC's interpretation of relevant law, though not conclusive,

could be highly persuasive.

Conclusion

Payment of consultant fees and other costs during the Optimization Period of the Nat"l;lral

Solution Projects is a permitted use of Proposition 0 general obligation bond proceeds because

!33ll374.2 4

the Optimization Period activities constitute "improvement of real propert'J," authorized under

both the California Constitution and Proposition 0.

13311374.2 5

Attachment 3

Proposition 0 Projects Optimization

Project Scope and Budget

Council District:

Site Description:

Project Description:

Benefits:

Requested PropO Funding:

Total Project Cost:

South Los Angeles Wetlands Park

CD 9-Jan Perry

Project is located between 54rh and 55rh Streets and bordered by Avalon and San Pedro Boulevards. The property which was owned by the Metropolitan Transportation Authority (MTA) was purchased by the City on February 2009 for the amount $3M ($2M from Prop. 0 and $1M from Prop. K).

Project will span an entire City block, and will divert and treat storm duin flow from a 525-acre watershed area. The average daily diversion rate will be about 14,000 gallons per day. Key water elements of the pxoject include: 1) A hydrodynamic separator to remove trash, sediments, oil and grease, 2) 4.0 to 4.5 acres of wetlands to remove nutrients, metals, bacteria and other pollutants through uptake by vegetation and other wetland processes. The total wetland volume will be approximately 7.5 acre-feet.

The overall goal of the project is to aid the City in meeting water quality regulations, known as the TMDLs for Los Angeles River Watershed. Project will treat pollutants of concern typical of urban runoff, such as: bacteria, oil & grease, gasoline, suspended sedim=ts and heavy metals, all of which are components of urban runoff that ultimately are washed into receiving waters. In addition, the wetlands park will provide valuable green space and educational opporrunities through features such as a pocket park, trails and signage, wildlife viewing areas, picnic areas, historic railway elements, and the renovation of an existing historical building into a multi-use center for the community.

$16,678,202 million (includes Site Readiness)

$26,374,067, of which City is using $3.3 million grant from Proposition 50, $3.7 million fxom the Collection Systems Settlement Agreement -Supplemental Environmental Project funding from the City, $1.5 million from Proposition K, $2 million from Proposition 12, $1.3 million from Proposition 40,$200,000 USEPA Brownfields Grant, and $967,501 from MTA.

CITY OF" LOS AN!3ELES - BUREAU OF" SANITATION - WATER.SHEO PROTECTION DIVISION

PROo..i CPTIM-SOUTH !..A WETLANDS- 3_20_1 2.00CX

CJTV OF I..OS ANGEL.ES

~~IOiss SANITATION bi!P'AR.T!I.tEHT Of

PUBLIC WORKS

Status: Construction was completed in Decembex 2011.

Project Components

Diversion Structure/Pump Station

Hydrodynamic Separator

Project Optimization Summary

Frequency/ Description

Frequency: 9x per year [dry season (2) and after storm events (7)]

The submexged pumps require regular inspection and optimization during .the wet season to ensure optimal performance of both the low flow and high flow pumps. The wet well needs to be drained and the pumps and other structures should be inspected for physical damage and repaired if needed. The pumps should also be inspected during operation to ensure satisfactory performance and adjusted if needed. Inspection of the pump station should be synchronized with other optimization activities to provide adequate draining of the wet wells. Estimated electricity costs for power consumption are included in the cost.

Frequency: 9x pex year [dry season (2) and after storm events (7)}; Initial inspections 4x during first month of wet weather

After the unit (which is part of the pre-treatment system) is installed, inspections should be performed after every runoff event for the first 30 days. Inspections will be visual to ascertain the unit is functioning properly and measuring the amount of deposition that has occurred in the screen unit and depth of floatable material. Based on the behavior of the unit standard inspections can be scheduled based on projections using storm events vs. pollutant buildup. After the first 30 days, the unit should be inspected at least once every 30 days in the rainy season. Floatables and debris should be removed and the sump cleaned when the device is 85% full. At least once a year, the unit should be pumped down and the screen inspected for damage and to ensure the screen is properly attached:The screen should be power washed before inspection. Optimization requires vehicle access for removal of trash, debris, and sediment. The unit should only be cleaned when there is no flow entering the system; therefore the influent pumps will need to be shut off during optimization activities. A vacuum truck is the most effective and convenient for removing accumulated pollutants from the system via the manhole covers on the unit structure. Vacuum truck rental fee for othex project components is included in the cost.

CiTY OF" LOS ANGELES- EIUREAU OF SANITATION- WATERSHED PROTECTiON DIVISION

PRO.J 0PTJM•SOUTH LA WETLANDS- 3_20_1 2.DOCX

Landscaping (Non-Wedand)

Wedand Landscaping

Water Feature

Trash Maintenance Hole

Frequency: 4x per year for removing weeds, clearing debris, pruning staking; 1x per year for vegetation replacement

The overall landscape of the park needs to be properly optimized. Invasive species and non-native weeds shall be carefully monitored and removed once they appear on site as needed. Site landscaping will include removing weeds, pruning, clearing debris, and staking trees. .

Vegetation replacement should occur once per year. Over three years up to 25% of vegetation may require replacement with approximately 15% the first year and 5% in years two and three.

Frequency: 4x per year for removing weeds and clearing debris; 6x per year for selective pruning and cutting; 1x per year for vegetation replacement

The overall wetland area landscape needs to be properly optimized. Invasive species and non-native weeds shall be carefully monitored and removed once they appear on site as needed. Site landscaping will include removing weeds and clearing debris. During the non-nesting season, September through February, selective cutting and pruning should occur monthly to thin vegetation as needed. Thinning is necessary to ensure the inlet and outlet remain unobstructed and the general circulation of the water is unimpeded.


Frequency: 4x per year

The water feature pump will require regular inspection and optimization to ensure optimal performance, The pump should also be inspected during operation to ensure satisfactory performance. Damaged parts will be replaced as needed based on inspections. Inspection of the water feature pump should be synchronized with other optimization activities. Estimated electricity costs are negligible.

Frequency: 4x per year inspections and debris removal

Trash maintenance hole will be inspected quarterly for the first year to determine the proper cleaning cycles. It is assumed the trash maintenance hole will be cleaned four times per year. Optimization consists of removing collected debris with a vacuum truck. Vacuum truck rental cost and disposal included with hydrodynamic separator cost.

CiTY OF" LOS ANGEI..ES - BUREAU OF" SANITATICJN - WATERSHED PROTECTICJN DIVISION

PRO.J OPTRM-SOUTH LA WETI..ANOS ~ 3_20_ 1 2.DCJCX

Frequency: 39x in first year inspections for leaks then 12x per year thereafter; 1x per year irrigation system repairs

A supplemental irrigation system is necessary to establish the vegetation. During the initial year the system should be Inigation System inspected weekly for leaks and dry areas during the dry season (9 months) and monthly for the other 3 months. During

subsequent years the system should be inspected monthly.

Irrigation systems repairs will occur as needed (major repairs are anticipated to occur annually).

T otal1~yr Optimization Cost j $215,000

CITY OF" LOS ANt;JELES - BUREAU OF SANITATION - WATEI'!SHEO F'I'!OTECTlON DIVISION

PI'!O.J OPTIM~SoUTH LA WETLANDS~ 3_20_1 2.00CX

Council District:

Site Description:


Benefits:

Approved PwpO Funding:

Total Project Cost:

Status:

Mar Vista Recreation Center Stormwater BMP

CD 11 -Bill Rosendahl

Site is a City-owned park and recreation center in Pahns. The recreation center is approximately 15 acres and includes tennis courts, sidewalks, landscaped areas, and a parking lot.

Scope of work includes construction of a flow diversion facility, stormwater lift station, hydrodynamic separator, underground detention tank, disinfection facility, final effluent pump station, recirculation pump, and overflow piping at Mar Vista Park. Off-site surface runoff will be diverted from an existing storm drain in Sawtelle Boulevard to the hydrodynamic separator for removal of heavy sediments, oil, grease, and trash and then sent to an underground detention tank for beneficial use at the park.

The project will remove bacteria and other pollutants from urban runoff of the Mar Vista subwatershed, and keep them from reaching Ballona Creek and Santa Monica Bay thereby assisting the City in meeting water quality regulations, known as TMDLs. Project will also treat other pollutants of concern typical of urban runoff, such as: oil & grease, gasoline, suspended sediments and heavy metals, all of which are components of urban runoff that ultimately are washed into receiving waters. In addition, it will help in the ~ity's water conservation efforts. .

$4,556,186

$4,556,186

Project was completed in May 2010.

CITY OF LOS AN13E:LES- BUREAU OF SANITATION- WATERSHED PROTECTION DIVISION

PRO.J J:IPTIM•MAR VISTA a 3 20 1 2.00CX

CITY OF I..OS ANCEL.ES

l ~ ~ ~I SANITATION Di!P"AitTMENT Oi'

PUBLiC WORKS


Project Components Frequency/ Description


Diversion Structure and The submerged pump requires regular inspection and optimization during the wet season to ensure optimal performance.

Stonnwater Lift Station The wet well needs to be drained and the pumps and other structures should be inspected for physical damage and repaired if needed. The pump should also be inspected during operation to ensure satisfactory performance. Inspection of the lift station should be synchronized with other optimization activities to provide adequate draining of the tanks and wells. Estimated electricity costs for power consumption are included in the cost.

Frequency: 9x per year [dry season (2) and after storm events (7)]; Initial inspections 4x during first month of wet weather

After the unit (which is part of the pre-treatment system) is installed, inspections should be performed after every rur,toff event for the first 30 days. Inspections will be visual to ascertain the unit is functioning properly and measuring the amount of deposition that has occurred in the screen unit and depth of floatable materiaL Based on the behavior of the unit standard inspections can be scheduled based on projections using storm events vs. pollutant buildup. After the flrst

Hydrodynamic Separator 30 days, the unit should be inspected at least once every 30 days in the rainy season. Floatables and debris should be removed and the sump cleaned when the device is 85% full. At least once a year, the unit should be pumped down and the screen inspected for damage and to ensure the screen is properly attached. The screen should be power washed before inspection. Optimization requires vehicle access for removal of trash, debris, and sediment The unit should only be cleaned when there is no flow entering the system; therefore the influent pumps will need to be shut off during optimization activities. A vacuum truck is the most effective and convenient for removing accumulated pollutants from the system via the manhole covers on the unit structure. Vacuum truck rental fee for other project componems is included in the cost.


Underground Detention Tank Since some flue particulates will pass through the hydrodynamic separator, the underground detention tank will be monitored regularly to determine if sediment is building up. If so, the units can be cleaned by inserting su,bmersible solids-handling pumps into the access ports. It should be noted the underground systems could be considered confmed spaces and there could be additional safety requirements for entry. Vacuum truck rental and associated costs are included within hydrodynamic separator component.


Chlorination Facility All components of this facility (tanks, pipes, pumps, electronic equipment, etc.) should be inspected routinely to ensure they are working properly. Operations adjustments and repairs may be needed. Bulk dry chlorine will be stored on-site in quantities as dictated by the selected chlorination system. Estimated electricity costs for power consumption and chemicals

1

are included in the cost.

Irrigation Pump Station Frequ_c=.ncy: 9x per year [dry season (2) and after stonn events (7)]

a::;ITY OF' Los ANGELES- BUREAU OF" SANITATION- WATERSHED PROTECTION DIVISION

PRO.J OPTJM•MAR VISTA· 3_20_1 2.00CX

- -- ----- I

i

The pump station will require regular inspections similar to that provided for sewage pump stations. The submerged pump : requires regular inspection and optimization during wet season to ensure optimal performance. The wet well needs to be drained and the pump and other structures should be inspected for physical damage. Damaged parts will be replaced as needed. The pump should also be inspected during operation to ensure satisfactory performance. Inspection of d1e effluent pump station should be synchronized with other optimization activities to provide adequate draining of the tanks and wells. Estimated electricity costs for power consumption are included in the cost. Vacuum truck rental for sump clearing and associated costs are included within hydrodynamic separator component.


Recirculation Pump The recirculation pump will require regular inspection and optimization to ensure optimal performance. The pump should also be inspected during operation to ensure satisfactory performance. Damaged parts will be replaced as needed based on inspections. Inspection of the recirculation pump should be synchronized with other optimization activities. Estimated electricity costs for power consumption are included in the cost.

Frequency: 9x per year [dry season (2) and after storm events (7)

Overflow Piping The inspection of the overflow piping should be synchronized with other optimization activities. Repairs and clearing blockages may be needed if unexpected blockages occur. Vacuum truck rental for clearing blockages is included within hydrodynamic separator component cost.

Frequency: 39x in flrst year for inspections; lx per year irrigation system repairs

..An irrigation system is necessary to distribute stormwater treated onsite to select locations in the park for irrigation Irrigation System purposes. During the initial year the system should be inspected weekly for leaks and dry areas during the dry season (9

months) and monthly for the other 3 months.

Irrig_ation systems repairs will occur as needed (major repairs are anticipated to occur annually).

Total1-yr Optimization Cost j $152,100 --- -- -- --·····

CiTY OF LOS ANGELES- BUREAU OF" SANITATION- WATERSHED PROTECTION DIVISION

PRO.! OPTIM·MAR VISTA· 3_20_1 2.DOCX

Council District:

Site Description:


Benefits:

Appwved Prop 0 Funding:

Westside Park Rainwater Irrigation

CD 10- Herb J. Wesson, Jr.

Project is located in a predominantly single-family neighborhood in Council District 10 at 2800 South Fairfax Avenue and includes the existing Westside Park. The Project site is approximately 4.5 acres and owned by the Los Angeles Department of Water and Power and Department of Recreation and Parks. The site contains multiple high voltage electrical facilities. As a collaborative project, UDWP will be leasing its property to the Department of Recreation and Parks.

Project will treat on-site runoff and divert off-site dry weather flow from an existing Reinforced Concrete Box (RCB) for pretreatment through a floatables screening well and lift station (pump well) at the project site. Average daily dry weather flows i.n the RCB are approximately 36,700 gallons. The dry weather flows will be distributed to portions of the turf areas via a subsurface irrigation system. Excess subsurface irrigation will flow along an impermeable liner and into a dry creek (bioretention basin). The dry creek will have under-drain piping to collect water and return it to the existing underground storm drain for release into Ballona Creek.

The project will aid the City in meeting water quality regulations, known as the TMDLs for the Ballona Creek. Project will treat pollutants of concern typical of urban runoff, such as: bacteria, oil & grease, gasoline, suspended sediments and heavy metals, all of which are components of urban runoff that ultimately are washed into receiving waters. In addition, the park will provide valuable green space and include a UPiversally accessible playground, sensory/ demonstration garden, fitness equipment, and jogging/walking paths.

$6,904,589

CITY OF" LOS ANGEI..ES - BUREAU OF" SANITATION - WATERSHED PROTECTION DIVISION

PRO.J OPTiM•WESTS!DE PARK - 3_20_ 1 Z,OOCX

CITY OF LOS ANCEI..ES

~I I ~ = SANITATION PEPAilTME.NT OF

PUBLIC WORKS

Total Project Cost:

Status:

$8,304,589 million, of which City is using $2 million grant from Proposition 50 - Santa Monica Bay Restoration Grant Program the Santa Monica Bay Restoration Commission, $900,000 from City collected Quimby fees, and $500,000 from Proposition K

Construction was completed in July 2011.




The submerged pumps require regular inspection and optimization during the wet season to ensure optimal performance

Diversion Structure/Pump of both the low flow and high flow pumps. The wet well needs to be drained and the pumps and other structures should

Station/Sluice Gate be inspected for physical damage and repaired if needed. The pumps should also be inspected during operation to ensure satisfactory performance and adjusted if needed. Inspection of the pump station and sluice gate should be synchronized with other optimization activities to provide adequate draining of the wet wells. Accumulated sediments will be removed as part of routine trash maintenance hole work. Estimated electricity costs for power consumption are included in the cost.

Frequency: 4x per year inspections and debris removal

Trash Maintenance Hole Trash maintenance hole will be inspected quarterly for the first year to determine the proper cleaning cycles. It is assumed the trash maintenance hole will be cleaned four times per year. Opti.m.i.zation consists of removing collected debris with a vacuum truck. Vacuum truck rental cost and disposal included with hydrodynamic separator cost.

Frequency: 4x per year for removing weeds, clearing debris, pruning staking; 26x per year for mowing turf; lx per year for vegetation replacement

The overall landscape of the park needs to be properly optimized. Invasive species and non-native weeds shall be carefully Landscaping monitored and removed once they appear on site as needed. Site landscaping will include removing weeds, mowing,

pruning, dearing debris, and staking trees.

Vegetation replacement should occur once per year. Over three years up to 25% of vegetation may require replacement with approximately 15% the first year and 5% in years two and three. Frequency: 39x in first year inspections for leaks then 12x per year thereafter; lx per year irrigation system repairs

.

I I

Traditional Irrigation System

A supplemental irrig-ation system is necessary to establish the vegetation and for permanent watering of turf areas.!?:~~----------~ CiTY CF'.LCS AN13EL.ES- IBUREAU CF' SANITATION- WATERSHED lF'RCTE;CTICN DIVISION

PRD.J 0PTIM-WESTSlOE PARK- 3_20_1 2.DCCX

served by the Epic System. During the initial year the system should be inspected weekly for leaks and dry areas during the dry season (9 months) and monthly for the other 3 months. During subsequent years the system should be inspected monthly.

Irrigation systems repairs will occur as needed (maior repairs are anticipated to occur annually).

Frequency: 2x per year inspections (before and after rainy season), 1x every two years clean out underdrain

Underdrain System Prior to and after the rainy season the underdrain system should be inspected and cleaned. The underdrain system may be accessed through the cleanout ports, which extend to the surface of the ground. It is estimated cleaning will occur every two years. The procedure is easily done with the use of any standard vacuum truck. All debris, organics and sediments should be transported to an approved facility for disposal in accordance with local and state requirements.

Totall~yr Optimization Cost I $138,180

CITY OF !..OS ANGELES- BUREAU OF SANITATII:JN- WATERSHED PROTECTION DIVISION

PRO.J DPTIM·WESTSIDE PARK - 3_20_ 1 2.00CX

Council District:

Site Description:


Benefits:

Requested P:ropO Funding:

Total Project Cost:

Status:

Peck Park Canyon Enhancement

CD 1 -Janice Hahn

Project is located within a 31-acre undeveloped portion of Peck Park. Peck Park is located at 560 N. Western Avenue. The park is surrounded by urban development, including a commercial center, single-family and multi-family residential units, and an elementary school.

Pxoject incorporates multiple Best Management Practices and Low Impact Development techniques, including: vegetated bioswales, infiltration field/basins, new stormwater catch basins with catch basin inserts, energy dissipaters, porous pavement, an infiltration strip, native landscaping, slope stabilization, channel annoring, stepped pools, trash receptacles, and mutt mitt dispensers. Other improvements not funded by Proposition 0 include 1) restoration and widening of existing trails 2) development of new trails 3) addition of pedestrian bridges to provide access over streams and 4) sign and trash bins to discourage illegal dumping and motorized vehicle use.

The overall goal of the project is to aid the City in meeting water quality regulations, known as TMDLs for the Dominguez Watershed. Project will treat pollutants of concern typical of urban runoff, such as: bacteria, oil & gtease, nutrients, gasoline, trash, suspended sediments and heavy metals, all of which are components of urban runoff that ultimately are washed into Los Angeles Harbor and San Pedro Bay. Energy dissipating BMPs will reduce the velocity of the stream resulting in reductions in erosion and sediment loading. In addition, the project will provide recreational benefits.

$6,190,000

$8,231,118, of which the City is using $2,041,118 from Proposition 50, Proposition 13, and Recreation and Trails Grant

Project was completed in May 2011.

C!TV OF !..OS AN!::!EL.ES - ISUR.EAU OF SANITATION -WATERSHED PROTECTION DIVISION

PROoJ DPTIM·PECK CANYON· 3_20_1 2.DOCX

CITV OF !..OS ANGEI..ES

.<lliiW.n I ~

I I~ ~

SANITATION DlPA.tTMEN'i" 01

PUBLIC WORKS

Project Components

Vegetated Bioswales


Frequency I Description

Frequency: 9x per year [dry season (2) and after storm events (7)] for pruning, clearing debris, and mowing; lx per year for vegetation replacement

Optimization activities should include periodic mowing (generally once per season), trimming, weed control, watering during drought conditions, reseeding of bare areas, and clearing of debris and blockage. Cuttings should be removed from the channel and disposed in a local composting facility. Accumulated sediment should also be removed manually to avoid concentrated flows in the bioswale. The application of fertilizers and pesticides should be minimal. Any damaged portions of the bioswale should be repaired and all standing water should be removed during optimization and be disposed to a sanitary sewer at an approved discharge location. Residuals must be disposed in accordance with local or State requirements. Inspections should occur nine times per year as part of pruning, clearing debris, and mowing activities. Inspections should occur before the rainy season and after periods of heavy runoff. Inspections will include observations of gullies and erosion.

Vegetation replacement should occur once per year. Over three years up to 25% of vegetation may require replacement with approximately 15% the first year arid 5% in years two and three.

C:!TY OF LOS ANGELES- BUREAU OF SANITATION- WATERSHED PROTECTION DIVISION

PRO..! OF'TiM~PECK CANYON • 3_20_1 2.0CCX

Infiltration Fields /Basins

Porous Pavement

Energy Dissipaters

Catch Basin Drain Inserts

Frequency: 9x per year [dry season (2) and after storm events (7)] for pruning, clearing debris, and mowing; lx per year for sedllnent removal; lx per year for sedllnent removal

Optimization activities should include trimming, mowing, weed contra~ watering during drought conditions, reseeding of bare areas, clearing of debris and blockage, and sedllnent removal. Cuttings should be removed from the fields/basins and disposed in a local composting facility. The application of fertilizers and pesticides should be minimal. Any damaged portions of the infiltration fields/basins should be repaired and all standing water should be removed during optimization and be disposed to a sanitary sewer at an approved discharge location. Residuals must be disposed in accordance with local or State requirements. Inspections should occur before the rainy season and after periods of heavy runoff Inspections will include observations of gullies and erosion.

Sedllnent should be removed if storage volume is decreased by 20% or more or when 6 to 12 inches have accumulated in the forebay (expected to be once per year). Sedllnent removal costs for this component also include sediment removal costs for slope stabilization/ channel armoring/ stepped pools as activities are expected to occur concurrently, see below. Basin outlets and overflows should be cleared of blockages to maintain system flow capacity.


Frequency: 4x per year (street sweeping and pressure washing)

Optimization activities for porous pavement and interlocking concrete paving blocks includes removal of organic materials (leaves) and periodic vacuuming and low-pressure washing to clear voids and extend the functional life of the materials. Street sweepers should be used with vacuums, brushes, and water.

Frequency: 4x per year inspections for damage and repairs

Routine inspections should include checks for sliding, seepage, erosion, cracks, and loose materials. If deficiencies are discovered then repairs should be performed immediately. M:inor repairs consist of fixing cracks and loose materials. Major repairs are not anticipated and are not included.

Frequency: Cleaning up to 4x per year; 2x inspections

Optimization consists of routinely removing collected trash and debris from catch basins. Each unit must be inspected and cleaned between May 1 and September 30. Optimization will vary by area: High trash generating areas 4 times/year, medium trash generating areas 4 times/year, and low trash generating areas 3 times per year. Trash and debris can be removed by vacuum truck During first year of operation covers will be inspected twice, once during the dry season and once during the wet season to determine if deanin..K_9'Cles are adequate. ·

C!TV OF" LOS ANGEL.E:6- BUREAU OF SANITATION- WATERSHE:O PROTECTION OIVISICIN

PRO..! OPTIM~PECK CANYON • 3_20_ 1 2.DOCX

Native Landscaping (includes non-Prop. 0 funded and Prop. 0 funded)

Irrigation System (NonProp. 0 funded and Prop. 0 funded)

Slope Stabilization/Channel Armoring/Stepped Pools

Mutt Mitt Dispensers


The overall landscape of the park needs to be properly optimized. Invasive species and non-native weeds shall be carefully monitored and removed once they appear on site as needed. Site landscaping will include removing weeds, pruning, dearing debris, and staking trees.


Frequency: 39x in flrst year inspections for leaks then 12x per year thereafter; 1x per year irrigation system repairs

A supplemental irrigation system is necessary to establish the vegetation. During the initial year the system should be inspected weekly for leaks and dry areas during the dry season (9 months) and monthly for the other 3 months. During subsequent years the system should be inspected monthly.


Frequency: 4x per year inspections and repairs; 1x per year sediment removal

Inspections of the slopes (including turf reinforcement mats), channel armoring, and stepped pools should occur 4 times per year on a quarterly basis. Slopes should be checked for gullies and erosion on a quarterly basis with necessary repairs conducted immediately to prevent further damage. Routine inspections of the channel armoring should occur quarterly and should include checks for sliding, seepage, erosion, cracks, and loose materials. If deficiencies are discovered then repairs should be performed immediately.

Annual sediment removal from the stream channels and stepped pools should occur. Removal should occur by hand tools and small equipment so as to not adversely impact vegetation. Removal costs are included within the costs for infiltration fields/basins as these activities are expected to occur concurrently.


Replace mutt mitts in dispensers on a quarterly basis. Assume optimized after 1 year.

CITY OF" LOS ANeEL.ES- BUREAU OF SANiTATION- WATERSHED PROTECTION DIVISION

PRCI..l OPTIM·PECK CANYON - 3_20_1 2.00CX

Filter Fabric

Erosion Control Mats

Infiltration Strip

Frequency: 4x per year inspections; lx per year repairs

Inspections of the filter fabric should occur on a quarterly basis. Repairs of the fabric should occur on an ann'ual basis or sooner if needed.

Frequency: 21x per year erosion control mat inspections; lx per year erosion control mat repairs

Inspections of the erosion control mats should occur before during and after all major storm events (estimated at 7 storm evems per year). Inspections should note any damage to the mats and gullies and erosion areas.

Erosion control mat repairs should be performed annually and involves the replacement of damaged portions of the mat. Approximately 5% of the mat area will require replacement annually.

Frequency: 7x per year inspections; lx per year turf replacements, Triennially infiltration strip replenishment; lx per year turf replacement.

Seven times per year the inflltration trench will be inspected to ensure drainage of the facility is occurring within 72 hours. Infiltration trenches require extensive ongoing work to ensure effectiveness. In most circumstances their life expectancy is 8 to 19 years. Accumulated debris must be periodically cleaned from the surface to allow flows to infiltrate. If trenches become ineffective, they should be replaced or reworked immediately. It is assumed by the third year the gravel and filter fabric will become clogged and need replacement. Rock or gravel should be removed and washed of accumulated sediment or replaced with clean rock (California EPA, 2001). If the trench takes more than 72 hours to drain, then the rock .fill should be removed and all dimensions of the trench should be increased by 2 inches to provide a fresh surface for infiltration (CASQA, California Stormwater Quality Association BMP Handbook, 2003).

Turf should be replaced annually. Assumed 2.5% of turf will be washed out annually. Mowing not included as assumed additional turf area is negligible considering turf is already mowed in the park.

Totall-yr Optimization Cost I $164,300

CiTY OF' LOS ANGELES - BUREAU OF' SANITATION - WATERSHED PROTECTION OiVISION

PRO..! 0PTIM-PECK CANYON- 3_20_1 2.DOCX

Hansen Dam Wetlands Restoration

Council District: CD 7 - Richard Alarcon

Site Project is in the vicinity of Parking Lot #2 at the Hansen Dam Recreational Area, Description: south of the intersection of Osborne Street and North Dronfield Avenue. The

site is bordered by Hansen Lake to the east, Hansen Dam Golf Course and Hansen Dam to the south, and commercial and residential land uses to the north and west. The property is owned by the US Army Corps of Engineers and is leased by the City of Los Department of Parks and Recreation.

Project Desc:riprion:

Benefits:

Requested PropO Funding:

Total Project

Project will treat first flush onsite and offsite runoff from a 133-acre subwatershed area. Subwatershed includes residential and commercial land uses, parking lots, roads, and developed and undeveloped parkland. Subwatershed area flows enter the Hansen Lake riparian wetlands. Key water elements of the project include: 1) infiltration basins 2) bioswales. The north infiltration basin will treat 1. 72 acre-feet and the south infiltration basin will treat 1.12 acre-feet. Basin inlets will utilize trash racks to reduce trash in the basins. Wate:r exceeding the designed first flush will continue to flow down the existing channels. Bioswales will provide for pre-treatment of runoff from Parking Lot #2 prior to conveying the water to the south infiltration basin.

The overall goal of the project is to aid the City in meeting water quality regulations, known as the Tl\IDLs for Los Angeles Rive:r Watershed. Project will treat pollutants of concern typical of urban runoff, such as: bacteria, oil & grease, gasoline, suspended sediments and heavy metals, all of which are components of urban runoff that ultimately are washed into receiving waters. The project will reduce pollution entering the Hansen Lake riparian wetlands that provide habitat for the federally-listed endangered least Bell's vireo. In addition, other benefits include habitat enhancement through removal of invasive species and planting of native vegetation, and improving recreational value.

$2,220,702

$2,517,702 of which Mountains Resource Conservation Agency received

CITY OF i..OS ANGELES- BUREAU OF' SANITATION- WATERSHED PROTECTION DIVISION

PRC.J OPTIM·HANSEN DAM - 3_.20_1 .2,0CCX

CITY Of LOS ANGELES

.<*""c. I ~ 1-= ~

SANITATION OEPA.RTMEM"f OF

PUBLIC WORKS

Cost: $297,000 from Caltrans for design

Stams: Construction was completed in February 2012.

Project Components

Native Landscaping (in addition to seedmixes in bioswales and infiltration basins)

Infiltration Basins


Frequency I Description


The overall landscape of the park needs to be properly optimized. Invasive species and non-native weeds shall be carefully monitored and removed once they appear on site as needed. Site landscaping will include removing weeds, pruning, clearing debris, and staking trees.


Frequency: 9x per year [dry season (2) and after storm events (7)] for pruning, clearing debris, and inspections; 1x per year for sediment removal; 1x per year for vegetation replacement

Optimization activities should include pruning, weed control, reseeding of bare areas, clearing of debris and blockage, and sediment removal. Cuttings should be removed from the basins and disposed in a local compos ring facility. The application of fertilizers and pesticides should be minimal. Any damaged portions of the infiltration basins should be repaired and all standing water should be removed during optimization and be disposed to a sanitary sewer at an approved discharge location. Residuals must be disposed in accordance with local or State requirements. Inspections should occur before the rainy season and after periods of heavy runoff. Inspections will include spillways, outlets and inlets. Observations of gullies and erosion will be noted.

Sediment should be removed from the forebays once per year. Sediment removal costs for this component also include sediment removal costs from the bioswales as the activities are expected to occur concurrently. Basin outlets and overflows should be cleared of blockages to maintain system flow capacity. Sediment removal from the non-forebay areas of the infiltration basins is not anticipated during the optimization period.


CGTV OF" LOS ANGELES- BUREAU Of" SANITATION- WATERSHED PROTECTION DIVISION

PRO.J OPTJM-HANSEN DAM • ::1_20_1 2.DOCX

Bioswales

Trash Racks

Irrigation System

Erosion Control Blanket

Frequency: 9x per year [dry season (2) and after storm events (7)] for pruning, clearing debris, and inspections; lx per year for vegetation replacement

Optimization activities should include periodic pruning, trimming, weed controL reseeding of bare areas, clearing of debris and blockage, and sediment removal (see infiltration basins). Cuttings should be removed from the channel and disposed in a local compos ring facility. Accumulated sediment should also be removed manually to avoid concentrated flows in the bioswale. Sediment removal costs are included in the infiltration basin optimization costs. The application of fertilizers and pesticides should be minimaL Any damaged portions of the bioswale should be repaired and all standing water should be removed during optimization and be disposed to a sanitary sewer at an approved discharge location. Residuals must be disposed in accordance with local or State requirements. Inspections should occur before the rainy season and after periods of heavy runoff. Inspections will include observations of gullies and erosion.

Vegetation replacement should occur once per year. Over three years up to 25% of vegetation may require replacep1ent with approximatelY_ 15% the first year and 5% in years two and three.

Frequency: 26x per year inspections and 16x per year debris removal

Inspections of the trash racks should occur before during and after all major storm events (estimated at 7 storm events per year) and at a minimum once per month. Inspections should include volume of accumulated debris and note any blockages.

Frequency: 39x in first year inspections for leaks then 12x per year thereafter; lx per year irrigation system repairs



Frequency: 21x per year erosion control blanket inspections; 1x per year erosion control blanket repairs

Inspections of the erosion control blankets should occur before during and after all major storm events (estimated at 7 storm events per year). Inspections should note any damage to the mats and gullies and erosion areas.

Erosion control blanket repairs should be performed annually and involves the replacement of damaged portio:o.s of the mat. Approxinlately 5% of the blanket area will require replacement annually.

Totall-yr Optimization Cost I $151,830

C!TY OF' Lea ANil!E:I..ES - BUREAU OF" SANITAT!CN - WATERSHED PROTECTICN DIVISION

PRO.J CPTJM•HANSEN DAM· :3_20_1 2.0CCX

Council District:

Site Description:


Benefits:

Approved Prop 0 Funding:

Total Project Cost:

Status:

Grand Avenue. Stormwate:r BMP

CD 11 - Bill Rosendahl

This project targets an area of a high-density residential and commercial corridor in Venice, which is considered a "hot spot" in the Santa Monica watershed. By removing pollutants from urban and stormwater runoff, the tree wells will assist the City in meeting the Santa Monica Bay Beaches Bacteria TMDL.

Scope of work included installing (7) tree wells in the area bounded by Abbot Kinney Blvd, Venice Blvd, and Riviera Ave. The tree wells will treat all dry weather flow and a portion of wet weather runoff from a 7-acre drainage area. Pollutants that will be removed include bacteria, sediments, merals, nutrients, and organics.

The project will help protect the water and beaches of Santa Monica Bay, and thus the well-being of its visitors. Inilltrating water at the tree wells will contribute towards reducing downstream flooding and the amount of pollutants that would otherwise be washed off to the ocean.

$1,075,927

$1,075,927

Construction was completed in July 2009.

CITY CF Lee ANGELES- BUREAU OF SANITATION- WATERSHED PROTECTION DIVISION

Pl'aO.J OPTIM·GRAND AVENUE· 3_20_1 2.00CX

CJTY OF I..OS ANCEL.ES

~I I ~ = SANITATION b£.P.A:il'ftJEN'r 01

PUBUC WORKS



Frequency: 2x per year tree wells, 1x per year (major tree care); 2x per year tree inspections.

Optimization for each tree will be done twice a year; once at the beginning of the wet season to prepare the device for rain events and ensure it will work properly, and once at the end of the wet season to remove any trash and debris that may have been captured during rain events and ensure the device will work properly during the cb:y season. The accumulation of debris and sediment can be removed with simple biannual practices. If toxic substances should ever build to levels that may cause harm to the

Tree Wells (Filterra receiving water or wildlife, the media and plants can easily be replaced. The life expectancy of the devices is not a major concern

Stormwater Bioretention since the devices are made of concrete and the tree grates are galvanized steel. Optimization of each tree well includes: 1)

Filtration System) Inspection of Filterra and surrounding area, 2) Removal of tree grate and erosion control stones, 3) Removal of debris, trash and mulch, 4) Mulch replacement, and 5) Clean area around Filterra.

Major tree care consisting of pruning and staking will occur once per year.

Tree inspections consisting of evaluating the health of the trees will occur two times per year.

Total1-yr Optimization Cost I $26,820 '--···· ---···

CITY OF' Lea ANI:OIELE5 - BUREAU CF' SANITATION - WATERSHED PROTECTION DIVISION

PRO..! OPTIM·GRAND AVENUE- 3_20_1 2.00CX

_!

Council District:

Site Description:


Benefits:

Approved Pwp OFo.mding:

Total Project Cost:

Status:

Imperial Highway Sunken Median Stormwater BMP

CD 11 -Bill Rosendahl

Project was constructed along approximately 1 mile of Imperial Highway, from Pershing Dr. to California St. which receives an untreated runoff from a drainage area of approximately 7.5 acres. This project is located within a predominantly high-density residential area and also is a major transportation corridor within the Dockweiler Beach watershed with an Average Daily Traffic (AD1) Count of 32,000.

Runoff from 7.5 acres, mostly roadway, will be captured and treated by the following a 200-foot grass swale, a 250-foot long x 7-feet deep infiltration trench, native vegetation in the median along the full length of the project, and local regrading to reduce pending at Main Street Runoff will be directed toward the highway median for treatment through a grass swale, and subsequently, an infiltration trench. The grass swale consists of native grasses and will pretreat runoff prior to infiltration. In addition, new trees will be planted along the edges of the swale at spacing intervals similar to that of the Trees to the Sea. The infiltration trench will consist of a permeable soil layer over a high void RainStore3 subsurface storage system (or equal). When the infiltration trench reaches capacity, excess runoff will enter the existing inlet downstream. Native vegetation will be planted along the median to help stabilize the existing sandy soils.

The project will remove oil and grease, suspended solids, metals, and gasoline that would otherwise pollute Doclrnreiler Beach and the ocean. Completion of this project will improve water quality, preserve marine habitat and recreational uses of Santa Monica Bay, and protect the health and safety of beachgoers.

$2,723,403

$2,723,403

Construction was completed in July 2010. Water pending at the Main Street median was resolved in March 2011.

CITY OF LOS ANGELES- 181UREAU OF SANITATION- WATERSHED PROTECTION DIVISION

PRO..! CiF'TIM•IMPERIAL HWY • 3_20_1 2.COCX

CITY Of LOS ANGELES

;<'~!!Jc; I ~~ 1=-~

SANITATION D-2PAI1Tt.AENT 0!1'

PUBLIC WORKS

Project Components

Bioswale

Native Landscaping (in addition to bioswale)

Irrigation System

Infiltration Trench



Frequency: 9x per year [dry season (2) and after storm events (7)] for p!l.l111ng, clearing debris, and mowing; lx per year for vegetation replacement

Optimization activities should include periodic mowing (generally once per season), trimming, weed control, watering during drought conditions, reseeding of bare areas, and clearing of debris and blockage. Cuttings should be removed from the channel and disposed in a local composting facility. Accumulated sediment should also be removed manually to avoid concentrated flows in the bioswale. The application of fertilizers and pesticides should be minimal. Any damaged portions of the bioswale should be repaired and all standing water should be removed during optimization and be disposed to a sanitary sewer at an approved discharge location. Residuals must be disposed in accordance with local or State requirements. Inspections should occur nine times per year as part of pruning, clearing debris, and mowing activities. Inspections should occur before the rainy season and after periods of heavy runoff Inspections will include observations of gullies and erosion.


Frequency: 4x per year for removing weeds, clearing debris, pruning, and staking trees; lx per year for vegetation replacement

The overall landscape of the Imperial Highway median area needs to be properly optimized. Invasive species and non-native weeds shall be carefully monitored and removed once they appear on site as needed. Site landscaping optimization will include removing weeds, clearing debris, pruning, and staking trees.

Vegetation replacement should occur once per year. Over three years up to 25% of vegetation may require replacement with approximately 15% the first year and 5% in years two and three. Frequency: 39x in first year inspections for leaks then 12x per year thereafter; 1x per year irrigation system repairs



Frequency: 7x per year inspections; lx gravel and filter replacement in 3•d Year

Seven times per year the infiltration trench will be inspected to ensure drainage of the facility is occurring within 72 hours. Infiltration trenches require extensive ongoing work to ensure effectiveness. In most circumstances their life expectancy is 8 to 19 years. Accumulated debris must be periodically cleaned from the surface to allow flows to infiltrate. If trenches become

C!TV OF LOS ANGELES- BUREAU OF' SANITATION - WATERSHED PROTECTION DIVISION

PRO..! OPTJM•IMPERIAL HWY • 3_20_1 2.DOCX

ineffective, they should be replaced or reworked innnediately. It is assumed by the third year the gravel and filter fabric will become clogged and need replacement. Rock or gravel should be removed and washed of accumulated sediment or replaced with clean rock (California EPA, 2001 ). If the trench takes more than 72 hours to drain, then the rock fill should be removed and all dimensions of the trench should be increased by 2 inches to provide a fresh surface for infiltration (CASQA

1 California

Stormwater Quality Association BN.D? Handbook, 2003).

~~-···

CITY OF LOS ANGEI..ES- BUREAU OF SANITATION- WATERSHED PROTECTION DIVISION

PRD.J CF'TIM·9MPERIAL HWY- 3_20_1 2.DOCX

Totall~yr Optimization Cost $115,200

Council District:

Site Description:


Westminster Dog Park Stormwater BMP


Site is a City-owned park located in Venice. The park is approximately 2 acres and includes a dog park, sidewalks, landscaped areas, and a parking lot.

Scope of work illcludes c~nstruction of a vegetated swale with a shallow underdrain system and a modular constructed wetland [(StormTreat Unit (STU)]. The vegetated swale will capture pet waste and other pollutants in the park's runoff. The vegetation will remove pollutants by root uptake and will also slow the water to promote infiltration. The shallow underdtain system will collect the infiltrated water and carry it to the STU. The STU wetland will act as a bioremediation filter, removing more pollutants through f.tltration, absorption and biochemical reactions. The treated water will be discharged from the STU to an existing catch basin and to the storm drain system.

Benefits: The project will help the City comply with federal mandates to reduce bacteria levels in stormwater runoff. The new landscaped features will improve water quality and enhance the park for park users and the neighborhood.

Approved Prop $1,438,755 0 Funding:

Total Project $1,438,755 Cost:

Status: Construction was completed in February 2010.

CiTY OF" Lea .AN!OIELES- BUREAU CF SANITATION- WATERsHEO F'RCTECT!ON DIVISION

PRO.! OPTIM·WESTMINSTER • 3_20_1 .2.DOCX

CITY OF LOS ANGELES .

bl!iJ'"c I ~ I~ ~~

SANITATION DEPAR7M:EHT OF

PUBLIC WORKS

Project Com_E_onents

Vegetated Bioswales

Irrigation System

Storm Treat Unit



Frequency: 9x per year [dry season (2) and after storm events (7)] for pruning, clearing debris, and wereds; lx: per year for vegetation replacement

Optimization activities should include periodic pruning, trimming, weed controL watering during drought conditions, reseeding of bare areas, and clearing of debris and blockage. Cuttings should be removed from the channel and disposed in a local composting facility. Accumulated sediment should also be removed manually to avoid concentrated flows in the bioswale. The application of fertilizers and pesticides should be minimal. Any damaged portions of the bioswale should be repaired and all standing water should be removed during optimization and be disposed to a sanitary sewer at an approved discharge location. Residuals must be disposed in accordance with local or State requirements. Inspections should occur nine times per year as part of pruning, clearing debris, and mowing activities. Inspections should occur before the rainy season and after periods of heavy runoff. Inspections will include observations of gullies and erosion.


Vegetation replacement and vegetation replacement labor included in landscaping.

Frequency: 39x in first year inspections for leaks then 12x per year thereafter; lx per year irrigation system repairs

A supplemental irrigation system is necessary to maintain vegetation. During the initial year the system should be inspected weekly for leaks arid dry areas during the dry season (9 months) and monthly for the other 3 months. During subsequent years the system should be inspected monthly.

Irrigation _systems repairs will occur as needed (~ajor repairs are anticipated to occur annually).

Frequency: 2x per year debris removal, flow rate adjustments, and hose repair (before and after rainy season); 4x per year initial year sediment inspections; Every 2 years sediment removal

Large debris removal (such as trash and vegetation) should be removed from around the unit twice per year. Dead growth of vegetation in the wetland and vegetation replacement is included within the bioswale component.

Flow water adjustments should occur twice per year using the outlet control valve. Flow rate should be measured at discharge location using a timed-volume measurement

Hoses associated with sk.inuners should be inspected twice per year and replaced if necessary. Open sediment chamber cover and visually inspect skinuners to ensure flexible hoses are undamaged and tightly connected to the skimmer bulkhead.

CITY OF LOS ANt:IEL.£6- BUREAU OF SANITATION- WATERSHED PROTECTION DIVISION

JFI'RO.J CPTJM~WESTMINSTER ~ 3_20_ 1 2.DOCX

In the initial year of operation sediment in the sediment chambers should be measured to determine the rate of accumulation. After five .inches of sediment has accumulated the sediment should be removed (estimated to occur two years after operation). Sediment should be removed with a standard vacuum truck Clea.nout ports should be inspected upstream and downstream from the unit and accumulated debris and secliments should be removed at the same time. All debris, trash, organics, and sediments should be transported to an approved facility for disposal in accordance with local and state requirements.

Includes vacuum truck rental for underdra.in system component

Frequency: 2x per year (before and after ra.iny season), 1x every two years dean out underdra.in

Prior to and after the rainy season the underdra.in system should be inspected and cleaned. The underdrain system may be accessed Underdrain System through the cleanout ports, which extend to the surface of the ground. It is estimated cleaning will occur every two years at the same

time as the Storm Treat Unit. The procedure is easily done with the use of any standard vacuum truck All debris, organics and sediments should be transported to an approved facility for disposal in accordance with local and state requirements. All costs associated with sediment removal are included in the Storm Treat Unit component costs.

Totall-yr Optimization Cost j $42,750

CITY OF LOS ANGELES- BUREAU OF" SANITATION- WATERSHEO PROTECTION O!VISJON

PRO..! 0PTIM-WESTMINSTER - 3_20_ l 2.00CX

Council District:

Site Description:


Benefits:

Approved Pwp 0 Fwt1ding:

T ota!. Project Cost:

Status:

Oros Green Street

CD 13 - Eric Garcetti

Project is located in the Elysian Valley neighborhood of northeast Los Angeles, California, along Oms Street between Blake Avenue and the Los Angeles River. Steelhead Park lies at the northeast end of Oros Street and is owned and managed by the Mountains Recreation and Conservation Authority. Project itself was constructed on LA City property, within the 1 0' parkway easement that extends from the street curb to the private property line, and also underneath Steelhead Park on land under MRCA jurisdiction.

Project will treat runoff from 2.3 acres and 17 residential lots. Project is intended to capture both wet weather and dry weather runoff from private residencies, and clean it through a series of soil filtration and vegetative bioretention areas or "Stormwater Gardens" before it reaches the Los Angeles River. Five curb side "Stormwater Gardens" were constructed in the street parkway and a large infiltration gallery beneath Steelhead Park.

The project will remove oil and grease, suspended solids, metals, and bacteria. In addition, project will help meet the requited Tl\IIDLs for Reach 3 of the Los Angeles River as well as the future upcoming bacteria Tl\IIDL fm this section of the Los Angeles River.

$386,000 originally but then reduced to $197,600

$784,251

Construction was completed in August 2007.

CITY I:JF LOS ANGELES- 6UREAU !:IF' SANITATION- WATERSHED F'RI:lTEC::TI!:JN DIVISION

PRO..! OPTIM~Om::u:lS GREET STREET • :3_20_ 1 2.DI:JCX

CITY OF L.OS ANCELES

~I I ~ ~ SANITATION DEPAR-Tii.I:ENT Of

PUBLIC WORKS

' Project Optimization Summary


Frequency: 1x per year (major tree care); 1x pe.r year tree .replacement

Stormwater Gardens and Park Major tree care consisting of pruning and staking will occur once per year. ·

Tree replacement is estimated at one tree per year.

Frequency: Cleaning up to 4x per year; 2x per year inspections (1" year only)

Catch Basin Inserts Optimization consists of .routinely removing collected trash and debris from catch basins. Each unit must be inspected and cleaned between May 1 and September 30. Optimization will vary by area: High trash generating areas 4 times/year, medium trash generating areas 4 times/year, and low trash generating areas 3 riines per year. Trash and debris can be removed by vacuum truck. During first year of operation covers will be inspected twice, once during the dry season and once during the wet season to determine if cleaning cycles are adequate.

Frequency: Cleaning up to 4x per year; 2x per year inspections (1st year only)

Driveway Trenches and Trash Optimization consists of routinely cleaning driveway grates and removing collected trash and debris from trash collection Collection Inserts inserts in trenches. Trash and debris can be removed by vacuum truck. During first year of operation inspections will occur

twice, once during the dry season and once during the wet season to determine if cleaning cycles are adequate. Vacuum truck rental cost is included within catch basin inserts cost.

Frequency: 2x per year inspections; 2x per year clean out of drain system

Twice per year the infiltration gallery will be inspected to ensure drainage of the facility is occurring within 72 hours. Infiltration galleries require extensive ongoing work to ensure effectiveness. In most circumstances their life expectancy is 8 to 19 years. If galleries become ineffective, they should be replaced or reworked immediately. Rock or gravel should be

Infiltration Gallery .removed and washed of accumulated sediment or .replaced with clean rock (California EPA, 2001 ). If the gallery takes more than 72 hours to drain, then the rock fill should be removed and all dimensions of the gallery should be increased by 2 inches to provide a fresh surface for infiltration (CASQA, California Stormwater Quality Association BMP Handbook, 2003).

Twice per year the two drain clean outs conveying water to the infiltration gallery should be cleaned using a vacuum truck to remove accumulated sediment and other materials.

Tota11-year Optimization Cost J $36,860

CITY OF" !..OS ANGELES- BUREAU OF" SANITATION- WATEF<!SHEO PF<!OTE:CTJON DIVISION

PRO..! 0PTJM•0ROS GREET STREET • 3_20_1 2.00CX

Council District:

Site Description:


Benefits:

Approved Prop 0 Funding:

Penmar Water Quality Improvement Proposition 0 Project


Site is located at the Penmar Golf, Penmar Rec. & Park, and Marine Park The City ofLos Angeles and the City of Santa Monica are working together to implement this regional project which combines water quality improvement and Stormwater reuse for phase II. This project has an area of approximately 90 acres and is owned and operated by the City of Los Angeles RAP and City of Santa Monica.

This projeCt will divert storm flows from the Rose A venue storm drain to a storage reservoir and then release or pump the flow from the reservoir at a regulated rate to the sanitary sewer system. Storm flows within the design capacity of the system will be completely diverted to the wastewater treatment system. Dry weather flo.w from the storm drain will also be diverted and pumped directly to the sanitary sewer from the pump station wet welL This project configuration will allow the City to develop various Best Management Practices (B:tvfPs) in the future to manage the stormwater quality and potentially use the water for reclamation. Phase II, will address the use, and potential disinfection, of the runoff collected under Phase I.

The project will remove bacteria and other pollutants from urban runoff and keep them from reaching the Santa Monica Bay, thereby assisting the City in meeting water quality regulations for the Santa .Monica Bay Watershed, known as TMDLs. Project will also treat other pollutants of concern typical of urban runoff, such as: oil & grease, gasoline, suspended sediments and heavy metals, all of which are components of urban runoff that ultimately are washed into receiving waters. In addition, it will help in the City's water conservation efforts.

$20,7 54,800 for Phase I and $2,830,200 for Phase II

. CITY Of LOS ANGELES

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SANITATION DE:PAilTt..:lli:tiT Of

PUB:LIC WORKS

Total Project Cost:

$20,754,800 for Phase I and $2,830,200 for Phase II

Starns: Phase I is 1n Construction and Phase II is in Design




Diversion Structure and The submerged ptunp requires regula.r inspection and optimization during the wet season to ensure optimal performance.

Stormwater Lift/Pump Station The wet well needs to be drained and the pumps and other structures should be inspected for physical damage and repaired if needed. The pump should also be inspected during operation to ensure satisfactory performance. Inspection of the lift and ptunp station should be synchronized with other optimization activities to provide adequate dralnln.g of the tanks and wells. Estimated electricity costs for power consumption are included in the cost


Underground Detention Tank Since some fine particulates will pass through the hydrodynamic separator, the underground detention tank will be monitored regularly to determine if sediment is building up. If so, the units can be cleaned by inserting submersible solids-handling ptunps into the access ports. It should be noted the underground systems could be considered confined spaces and there could be additional safety requirements for entry. Vacuum truck rental and associated costs are included within hydrod_y_namic separator component.


Chlorination Facility All components of this facility (tanks, pipes, pumps, electronic equipment, etc.) should be inspected routinely to ensure they are working properly. Operations adjustments and repairs may be needed. Bulk dry chlorine will be stored on-site in quantities as dictated by the selected chlorination system. Estimated electricity costs for power consumption and chemicals are included in the cost.


The ptunp station will require regular inspections similar to that provided for sewage pump stations. The submerged pump requires regular inspection and optimization during wet season to ensure optimal performance. The wet well needs to be

Irrigation Pump Station drained and the ptunp and other structures should be inspected for physical damage. Damaged parts will be replaced as needed. The pump should also be inspected during operation to ensure satisfactory performance. Inspection of the effluent pump station should be synchronized with other optimization activities to provide adequate draining of the tanks and wells. Estimated electricity costs for power consumption are included in the cost. Vacuum truck rental for sump clearing and associated costs are included within hydrodynamic separator component.

Recirculation Pump Frequency: 9x per year [dry season (2) and after storm events (7)]

The recirculation pump will require regular inspection and optimization to ensure optimal performance. The pump should also be inspected during operation to ensure satisfactory performance. Damaged parts will be replaced as needed based on inspections. Inspection of the recirculation pump should be synchronized 'With other optimization activities. Estimated electricity costs for power consumption are included in the cost

Frequency: 39x in first year for inspections; lx per year irrigation system repairs

An irrigation system is necessary to distribute stormwater treated onsite to select locations in the park for irrigation Irrigation System purposes. During the initial year the system should be inspected weekly for leaks and dry areas during the dry season (9

months) and monthly for the other 3 months.


Total1-yr Optimization Cost I $237,500

Council District:

Site Description:


Benefits:

Approved Prop OFundmg:

Total Project Cost:

Status:

Catch Basin Opening Screen Covers and Inserts, Phase 1-3

CDs 1-15 (citywide)

Project sites are located throughout the City in the Ballona Creek and Los Angeles River watersheds. Phase I sites are located in high trash generation areas (>14 cubic feet of trash per acre). Phase II sites are located in medium trash generation areas (5 to 14 cubic feet of trash per acre)"

Project will install catch basin inserts and opening screen covers to prevent trash from entering stormdrains. Catch basin inserts are coarse screens installed within catch basins before the outlet pipe. During large storm events (> 10 year flow) the insert has an overflow device to preventing flooding. Catch basin opening screen covers are screens installed in the catch basins at the gutter. Covers prevent trash from entering the catch basin during dry weather events and small wet weather events (<0.25 inches). Phase I, involves the installation of approximately 7,620 inserts and 6,000 covers. Phase II, involves installation of approximately 6,400 covers. No catch basin inserts were installed during Phase II. Retrofit of approximately 24,219 catch basins with opening screen covers and 2,000 inserts. Includes City-owned catch basins not covered in Phases I, II as well, as all State and County catch basins within the City.

The overall goal of the project is to aid the City in meeting water quality regulations, known as TMDLs, for trash in the Ballona Creek and Los Angeles River Watersheds. Preventing trash from entering water the stormdrains and subsequently local water bodies protects public health, enhances receiving waters, preserves aquatic and marine habitat, and unproves visual aesthetics of water bodies. A secondary benefit of this project is a reduction of flooding during storm events associated with trash clogging stormdrains.

$14,909,000 for Phase I, $9,400,000 for Phase II and $44,500,000 for Phase III

$14,909,000 for Phase I, $9,400,000 for Phase II and $44, 500,000 for Phase III

Phase I and II were completed. Phase HI is at the end of construction.

CITY OF L.OS ANGELES"

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SANITATION O~ll'ARTtA:ENT OF

PUBLIC WORKS


Pwject Components Frequency I Description

Optimization will consist of field evaluating the existing retrofitted locations, approximately 10,000 CBs, to assess device performance to maintain "full capture" designation by the Regional Water Quality Control Board. Retaining such as a designation is important to meet Trash TMDL compliance milestones now and into the future. Those CBs having an insert and determined

Catch Basin Drain Inserts not to have met the requirements of "full capture" would need to be adjusted or appropriate means employed to regain the designation once more. The shown annual optimization cost is based on the assumption that 2% of the installations would require a response. Failure to appropriately addressed those installation failing to maintain a "full capture" designation exposes the City to significant financial liabilities for non-compliance

Optimization will consist of field assessment of the existing Citywide installations of CB opening covers, approximately 40,000 CBs, to assess device performance to maintain "partial capture" designation by the Regional Water Quility Control Board. The Regional Water Quality Control Board has acknowledged the City's screen installations as having a performance effectiveness of

Catch Basin Opening 86%. The City on an annual basis needs to ensure that the opening covers are fully operational. Those CBs having an opening Screen Covers screen cover that fail to meet the established performance effectiveness would need to be adjusted or appropriate means employed

to bring to full functionality. The shown optimization cost is based on the assumption that of 5% of the installations would require a response. Failure to appropriately address those installations failing to maintain a "partial capture" designation exposes the City to significant financial liabilities for non-compliance.

Totall-year Optimization Cost I $217,800 --··-·····-··

TRANSM!TTAL - Los Angelesclkrep.lacity.org/onlinedocs/2011/11-0575-S1_rpt_cao_10-25-12.pdf ·...

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