Wastewater Treatment Plant Background Wastewater Background May 2004

Wastewater Treatment Plant Background Wastewater Background May 2004 5/27/2004 CITY OF GALT public works Slide #1

Wastewater Treatment Plant Background Outline • • 5/27/2004 1983 WWTP 1991 WWTP 1995 -1999 History 2000 -2003 History 2003 -2004 History Unmet Needs for 1991 WWTP Upgrades to 1991 WWTP CITY OF GALT public works Slide #2

Wastewater Treatment Plant Background 1983 WWTP • Secondary Treatment – – Comminutor (Grinder) Aeration Basin Oxidation Ponds Chlorine Injection • Treatment Capacity of 0. 83 MGD • Adequate Disposal Capacity of 0. 83 MGD in Summer • Winter Season Discharge to Laguna Creek 5/27/2004 CITY OF GALT public works Slide #3

Wastewater Treatment Plant Background 1991 WWTP • Secondary Treatment – – – • • Headworks Oxidation Ditches Secondary Clarifiers Chlorine Contact Chamber Return Sludge and Waste Sludge (Lagoon) Treatment Capacity 3. 0 MGD Winter Season Discharge to Laguna Creek Inadequate Land Disposal Capacity for 3. 0 MGD Bond for $9. 77 M 5/27/2004 CITY OF GALT public works Slide #4

Wastewater Treatment Plant Background 1995 -1999 History • 1996 – Land Capacity Reached • 7/97 – City Receives New NPDES Permit (No Major Changes Compared to 1991 NPDES Permit) • 1998 – 30 acres of Sludge Injection Field Converted to Irrigation and Brought On-Line • 7/99 – Inspection by Regional Board; No Violations 5/27/2004 CITY OF GALT public works Slide #5

Wastewater Treatment Plant Background 2000 -2003 History • 7/00 – Started New Master Plan for Existing WWTP • 7/00 – City Received NOV from Regional Board – Cited Lack of Disposal Capacity – All Other Violations Resolved • 6/01 – City Received NOV from Regional Board – Cited Lack of Disposal Capacity – All Other Violations Resolved • 7/01 – Direction by Council to Acquire Additional Land • 7/01 – Began Evaluation of Parcels for Acquisition 5/27/2004 CITY OF GALT public works Slide #6

Wastewater Treatment Plant Background 2000 -2003 History (con’t) • 11/01 – Submitted Report of Waste Discharge for New NPDES Permit • 2/02 – Presented Offers to Roman Catholic Bishop and Twin Cities Business Park • 4/02 – Offers Rejected • 6/02 – Began Condemnation of RCB Property • 9/02 – Judge Dismisses Condemnation • 1/03 – City Receives Building Moratorium • 3/03 – Council Decides Against Condemnation and Leases RCB Property • 3/03 – Regional Board Rescinds Building Moratorium Upon Signed Lease 5/27/2004 CITY OF GALT public works Slide #7

Wastewater Treatment Plant Background 2003 -2004 History • 1/03 and 12/03 – City Receives First Tentative NPDES Permit and Second Tentative NPDES Permit • 1/04 – Regional Board Adopts NPDES Permit (Major Changes Compared to 1997 NPDES Permit) • 3/04 – City Appeals Many Provisions of New Permit • 4/04 – Stay Denied: New NPDES Permit Takes Effect • 4/04 – New NPDES Permit Limits Storage Capacity of Reservoir (Summer Capacity Reduced by 2 Years) • 5/04 – City Begins Evaluation of Land for Additional Disposal Capacity 5/27/2004 CITY OF GALT public works Slide #8

Wastewater Treatment Plant Background Unmet Needs for 1991 WWTP • No Grit Removal • Inadequate Land Disposal Capacity • Existing Control Building Not Connected to New Plant • Clay-lined Auxiliary Basin Serving as Bypass 5/27/2004 CITY OF GALT public works Slide #9

Wastewater Treatment Plant Background Upgrades to 1991 WWTP • Additional 210 Acres Added • Control Building “Plumbed” Into New Plant • Lift Station Constructed (for Control Building and Return from Auxiliary Basin) • Pipe from Headworks “Stubbed Out” for Connection to Auxiliary Basin • Lining of Auxiliary Basin Planned for FY 2005 5/27/2004 CITY OF GALT public works Slide #10

Wastewater Treatment Plant Background Summary • Secondary Treatment Plant 3. 0 MGD • Still Owe on Construction Bond • Onerous NPDES Permit Requiring Advance Treatment Pending Appeal • Shortage of Land for Dry Season Disposal • Lease for 180 Acres until 2008 (extend 2010) 5/27/2004 CITY OF GALT public works Slide #11