Title: PowerPoint Presentation WPDFinancial
1Trash TMDL Implementation Plan
Shahram Kharaghani Program Manager
February 28, 2005
2Los Angeles River /Ballona Creek Trash TMDL
- The 303(d) list identified the Los Angeles River
and Ballona Creek as being impaired due to trash. - A consent decree, signed on March 22, 1999,
requires TMDLs be adopted within 13 years. - Two TMDLs for these watersheds became effective
in August 2002.
3Los Angeles River /Ballona Creek Trash TMDL
- Established Waste Load Allocation (WLA) using
data from CDS unit in Calabasas - Assumed constant rate of trash generation per
land use within LA County - Allows collection of baseline data to refine
default Waste Load Allocation - Baseline monitoring
- Compliance with WLA calculated on a three-year
running average - Compliance monitoring schedule with a numeric
target of zero trash in Year 2013
4Los Angeles River /Ballona Creek Trash TMDL
Suggested Compliance Strategies
- End-Of-Pipe Full Capture Structural Controls, or
- install full capture devices progressively
throughout the watershed until all of the outlets
to the Los Angeles River system are covered. - Partial Capture Control Systems and/or
- Institutional Controls
5Los Angeles River /Ballona Creek Trash TMDL
End-of-Pipe Full CaptureStructural Controls
- Strict Compliance With Zero Trash Limit
- Traps all particles retained by a 5mm mesh screen
- Treatment capacity for a 1 year, 1 hour storm
event (0.6 in/hr rainfall intensity) - Considered in full compliance
- Potential Devices Meeting Strict Compliance
- CDS Units
- Fresh Creek Netting System
Continuous Deflection Separator (CDS) Unit
Trash Trap
6Los Angeles River /Ballona Creek Trash TMDL
Partial Capture Control Systems and
Institutional Controls
- Not Considered In Full Compliance
- Will Need Combination Of BMPs
- Catch Basin Inserts
- Catch Basin Opening Covers
- Public Outreach
- Enforcement
- Others
Catch Basin Opening Cover and Insert Unit
7City of Los Angeles Proposal- Trash TMDL
- Provide for Mixed Structural BMPs, e.g. Full and
Partial Capture Systems, and Institutional
Controls
8City of Los Angeles Proposal
Full/partial control systems institutional
controls
- STRUCTURAL MEASURES
- Full Capture Devices (CDS)
- Catch Basin Inserts
- Catch Basin Opening Covers
- End-of-Pipe Baskets
- INSTITUTIONAL MEASURES
- City Programs and Partnerships
- Public Outreach
- Business Outreach
- Enforcement
9City of Los Angeles Proposal
Full/partial control systems institutional
controls
STRUCTURAL MEASURES Full Capture Devices
- Install up to 40 Full Capture Units at Key
Locations - Design Criteria Limits Its Implementation as an
Option - Potential flooding concerns upstream of the
installed unit - Difficult to retrofit on existing storm drain
system
Continuous Deflection Separator (CDS) Unit
10City of Los Angeles Proposal
Full/partial control systems institutional
controls
STRUCTURAL MEASURES
Catch Basin Opening Covers
- Install 34,000 Units
- Ease of Installation Can Retrofit On Existing
Catch Basins - Inexpensive to Retrofit
- Prevent Trash From Entering Catch Basins
- Used In Combination With Catch Basin Inserts
- Potential for Ponding/Flooding
Catch Basin Opening Cover
11City of Los Angeles Proposal
Full/partial control systems institutional
controls
STRUCTURAL MEASURES
Catch Basin Inserts
- Install 34,000 Units
- Used In Combination With Catch Basin Opening
Covers To Remove other Pollutants - Easy to Install and Retrofit
- OM Labor Intensive
Catch Basin Insert Unit
12City of Los Angeles Proposal
Full/partial control systems institutional
controls
STRUCTURAL MEASURES
End-Of-Pipe Baskets
- Install up to 50 Units at Key Locations
- Prevent Trash from Entering Channels
- Inexpensive to Retrofit
- Potential Flooding Concerns Upstream of the
Installed Unit
End-of-Pipe Basket Unit
13City of Los Angeles Proposal
Full/partial control systems institutional
controls
- INSTITUTIONAL MEASURES
- City Programs and Partnerships
- Public Outreach
- Business Outreach
- Enforcement
14Implementation Cost for Trash TMDL
- End-Of-Pipe Full Capture Structural Controls
- Strict compliance with Trash TMDL Documents
- Full/Partial Control Systems Institutional
Controls - City of Los Angeles Proposal
15Implementation Cost for Trash TMDL Full Capture
Control Systems
16Implementation Cost for Trash TMDL Full Capture
Control Systems
17Implementation Cost for Trash TMDL Full Capture
Control Systems
18Implementation Cost for Trash TMDL Full Capture
Control Systems
19Implementation Cost for Trash TMDL - City of LA
Proposal Full Partial Capture Control Systems
BMP
CAPITAL
O M
CAPITAL LABOR
TOTAL/10 YEARS
TOTAL/YEAR
34,000 _at_ 1,000
40 _at_ 500,000
50 _at_ 10,000
34,000 _at_ 1,000
20 Trash TMDL Cost Summary
- End-Of-Pipe Full Capture Structural Controls
(Trash TMDL Document) - Strict compliance - 1.1 billion over 10 years
- Full/Partial Control Systems Institutional
Controls (City of Los Angeles Proposal) - 119 million over 10 years
21CITY STRATEGY OF MEETING THE FIRST COMPLIANCE
MILESTONE
- 20 Trash reduction by September 2006
- Conducted a study to identify the high trash
generation areas within the City - The study categorized the areas
- High (more than 14 cubic feet/acre)
- Medium (5-14 cubic feet/acre)
- Low (less than 5 cubic feet/acre)
- The study identified 10,000 Catch Basins to be
retrofitted with inserts
22HIGH TRASH GENERATION AREAS WITHIN THE CITY OF
LOS ANGELES
23CITY STRATEGY OF MEETING THE FIRST COMPLIANCE
MILESTONE
- Schedule of implementation
- 10,000 Catch Basin inserts and 6,000 CB opening
covers will be installed through three contracts
in 2005 and 2006
TOTAL PROJECT COST
CAPITAL STATUS
COMPLETION DATE
PROJECT NAME
NO. UNITS
Deep Catch Basin Insert Contract
Bids Received on Jan 19, 2005
7,000
9.41 million
Sept 2006
Bid Package will go to GSD in August 2005
Shallow Catch Basin Insert Contract
3,000
3.42 million
Sept 2006
Bid Package will go to GSD in May 2005
Catch Basin Opening Covers
Sept 2006
6,000
4.10 million
24LAWSUITS
- Two Lawsuits were filed by the City on State
Federal levels - The City challenged two key elements of trash
TMDLs - Full Capture Device Definition
- A full capture device is any device or system
that traps all particles retained by a 5 mm mesh
screen and has a design treatment capacity of not
less than the peak flow resulting from a
one-year, one-hour storm (determined to to be 0.6
inch per hour for the Los Angeles River
watershed, and assumed to be similar for the
Ballona Creek watershed). - A Reopener clause
25LAWSUITS (continued)
- Successfully negotiated the dismissal of the two
lawsuits - More flexible Full Capture Device Definition
- Any single device or series of devices that
traps all particles retained by a 5 mm mesh
screen and has a design treatment capacity of not
less than the peak flow rate (Q) resulting from a
one-year, one-hour storm in the sub-drainage area
is considered a full trash capture system. - Stronger Reopener clause was adopted
26CONCLUSIONS
- Compliance with TMDL is best suited through
adaptive management approach - Working collaboratively with Regional Board and
Environmental Organizations led to positive
results