Santa Clara River Chloride Santa Clara River Chloride Reduction - - PowerPoint PPT Presentation

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Santa Clara River Chloride Santa Clara River Chloride Reduction - - PowerPoint PPT Presentation

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Santa Clara River Chloride Santa Clara River Chloride Reduction Ordinance of 2008 Reduction Ordinance of 2008 O O verview and Lessons Learned verview and Lessons Learned Brian Louie Technical Services Department Los Angeles

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March 24, 2010

Santa Clara River Chloride Santa Clara River Chloride Reduction Ordinance of 2008 Reduction Ordinance of 2008 “ “O Overview and Lessons Learned

verview and Lessons Learned” ”

Brian Louie Technical Services Department Los Angeles County Sanitation Districts

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Presentation Overview Presentation Overview

  • Background on Chloride Issues in Santa Clarita
  • Path to local control of automatic water softeners
  • Water quality improvements achieved
  • Lessons Learned
  • Questions

Prospective AWS ban (SB1006) 1999-2003 Public outreach & rebates 2004 - Current Measure “S” (SB475) 2006 - Current

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L A C S D

County Sanitation Districts of County Sanitation Districts of Los Angeles County Los Angeles County

Santa Clarita Valley Sanitation District

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Santa Clarita Valley Sanitation District Santa Clarita Valley Sanitation District

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Reach 3 Reach 4A Reach 4B Reach 5 Reach 6

Santa Paula Fillmore Piru

Reach 7

Santa Clarita Valley

FILLMORE WRP

Santa Clara River Watershed Santa Clara River Watershed

2002 – Regional Board adopts TMDL standard of 100 mg/l

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20 MGD Microfiltration and Reverse Osmosis at Saugus and

Valencia WRPs

43-mile brine line & 3-mile ocean outfall through Ventura County

Total Present Worth Cost: ~$500 Million

Required Facilities to Meet Standard Required Facilities to Meet Standard

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Upper Santa Clara River Chloride Upper Santa Clara River Chloride Total Maximum Daily Load Total Maximum Daily Load

100 mg/L

SWP Cl as high as 140 ppm SWP Cl as high as 95 ppm

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Local Control for AWS Local Control for AWS (SB1006) (SB1006)

1999 - SB 1006 amended HSC Section 116786 Residential AWS control of new installations after

January 1, 2003 if: – local agency not in compliance – AWS control is only available means of achieving compliance – non-residential saline discharges limited “to the extent technologically and economically feasible”

Agency must characterize sources of chloride in an

independent study

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Chloride Loading Above Water Supply Based on Time of Day

0.2 0.4 0.6 0.8 1 1.2 1.4

1969 1979 1989 1995 1999/2000 2000/2001 Chloride Loading, pounds per household

Daytime Nighttime SRWS Prohibition is Invalidated, 1997

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55 Gallon Drum Brine Collection Tank Sample Point No. 3 (SRWS Brine Waste) Brine @ >10,000 ppm Loading >1 ppd for an “efficient” AWS

Brine Capture Line 2002 SCVJSS Chloride Source Report

AWS Test Study at Saugus WRP

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Chloride from running 1 AWS per day is equivalent to:

Washing Hands

19,000 times per day

Running Dishwasher

800 loads per day

Washing Hair

5,000 times per day

Cleaning Toilet

40 times per day

Automatic Water Softeners Automatic Water Softeners

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Sources of Chloride in Recycled Water Sources of Chloride in Recycled Water

Disinfection 10% Automatic Water Softeners 30% Residential, Commercial, Industrial 20% Water Supply 40%

  • AWS loading at 8,700 ppd
  • Source Report independently reviewed by NWRI
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  • 2003

SCVSD Bans Prospective AWS

  • 2004

SCVSD Begins Public Outreach

  • 2005

SCVSD Begins Phase I AWS Rebate

Local Control for AWS Local Control for AWS

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Local Control for AWS Local Control for AWS (SB 475) (SB 475)

2006 - SB 475 amended HSC Section 116786 specific to

Santa Clarita Valley issues

Residential AWS control of existing installations in SCV

after January 1, 2009 if: – Substantiate findings related to need for, timeliness, cost-effectiveness, and alternatives to ordinance – “Reasonable Value” rebates provided to residents before and after the effective date of ordinance – Ordinance is approved by majority vote of community

  • Voter materials must include cost difference of advanced

treatment with and without AWS removals

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Phase II Rebate Program Phase II Rebate Program

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Local Control for AWS Local Control for AWS (2008 Ordinance) (2008 Ordinance)

– 2008 Ordinance Findings (Required by SB 475)

  • Necessary and cost-effective means to achieve compliance

– Alternatives to ordinance – Cost effectiveness/timeliness of alternatives vs. ordinance – Reduction in chloride levels from voluntary rebate program – Projected reduction in chloride levels from ordinance

  • Non-residential saline discharges limited “to the extent

technologically and economically feasible”

  • Portable exchange softening capacity is available in Los

Angeles County

  • Avoid or significantly reduces costs of advanced treatment to

comply with TMDL

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  • 2008

Sanitation District Adopts New Ordinance Banning Existing AWS

Santa Clara River Chloride Reduction Ordinance of 2008

Local Control for AWS Local Control for AWS (2008 Ordinance) (2008 Ordinance)

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  • 2008

SCVSD Adopts New Ordinance Banning Existing AWS

  • 2008

SCVSD Puts Ballot Measure “S”

  • n November 2008 General Election

Local Control for AWS Local Control for AWS (2008 Ordinance) (2008 Ordinance)

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MEASURE MEASURE “ “S S” ”

  • 63% voted Yes
  • Effective January 1, 2009
  • Requires removal of all

AWS by June 30, 2009

  • 75% RV rebate eligibility

remains

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Automatic Water Softeners Automatic Water Softeners SCVSD Source Control SCVSD Source Control -

  • Results

Results

AWS Public Outreach Program AWS Removed

Phase I & II Rebate Program Removals(To Date) 5,900 AWS Rental Units Removal (To Date) 800

TOTAL AWS REMOVALS 6,700 ESTIMATED REMAINING AWS 300

  • More than 50% removals occurred after Nov-08
  • $2.4 million in rebates issued to community to date
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100 mg/L

Recycled Water Quality Recycled Water Quality Improvements from Source Control Improvements from Source Control

AWS Bans Overturned (1997)

SWP Cl as high as 140 ppm SWP Cl as high as 95 ppm

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Lessons Learned Lessons Learned

– Source characterization is key, but costly

  • Higher AWS efficiencies do not guarantee aggregate load

reductions to community sewer system

– Administrative hurdles to enact ordinances were very burdensome and costly

  • SB 1006 requirements (non-compliance; independent study)
  • SB 475 requirements (pursuing legislation; referendum process)

– Voluntary program with higher rebate picked off the “low hanging fruit” but not enough

  • Phase I rebates largely ineffective

– Mandatory removals via Measure S were still needed – Source control is superior to advanced treatment – Public outreach needs to be wary of changing messages as project conditions evolve

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Questions? Questions?

Brian Louie Los Angeles County Sanitation Districts (562) 908-4288, ext. 2802 blouie@lacsd.org