HB Planning Commission Parkside 9102002

1
HB Planning CommissionParkside9/10/2002

• Robert W. Harrison, PE
• President
• Conex Systems
• 714-968-1369
• ConexSys_at_socal.rr.com

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County of Orange HCA/Environmental Health
DivisionBolsa Chica (BC)/East Garden Grove
Wintersburg Channel (EGGWC)Bacteriological
MonitoringTotal Coliform (TC), E.Coli (EC),
Enterococcus (ENT) Most Probable Number per 100
ml Sample
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Slater Pump Station

• EGGWC Water Quality
• Evidence shows high bacteriological levels
• Total Coliform
• E. Coli
• Enterococcus
• High levels of phosphates, nitrates and heavy
  metals (Bolsa Chica Restoration EIR)
• Parkside will create additional runoff which will
  add to the existing bacteriological levels
• The impact of this additional influx into the
  pump station on the bacteriological levels has
  not been, but must be defined
• The Wintersburg Channel empties into outer Bolsa
  Chica Bay and then through Huntington Harbour
  increasing pollutant levels in both
• What treatment processes will be used to reduce
  these levels?

4
Slater Pump Station

• Permits
• HB Department of Public Works (HPDPW) insists no
  permits will be required for any work on the
  Slater Pump Station
• Stated that Pumps 4 5 were installed without
  County permits
• Orange County records show that ALL inlets to
  EGGWC (C05) were properly permitted by HB David
  Webb, County of Orange 9/4/02
• Original permits (1964 1965)
• Additional pumps to the C05 channel, 3 outlet
  repairs 5 new outlets constructed (5/15/75)
• Parkside EIR (5/27/98 8/10/01)
• Orange County has responded to HB and stated
• Permits Will be Required
• Only the issue of the discharge quantity has been
  addressed
• Does not address the issue of bacteriological
  discharge

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Land History

• Wetlands Origins
• Much of the land is below sea level
• Land elevation requiring substantial fill
• 5½ to 10½ feet
• Remains of the original wetlands still exists
• Salt tolerant plants are still present
• Pickle Weed
• Wetlands validation
• Core samples would be adequate
• Validate if the anaerobic line still exists
  defining a wetlands
• Historical maps show area as a wetlands
• Original ocean inlet was through the beach south
  of Warner Avenue

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Best Land Usage

• Recommendation
• Structured wetlands Public acquisition
• Provide a filter basin for the EGGWC
• Natural treatment for water purification prior to
  entering outer Bolsa Chica Bay and Huntington
  Harbour
• Provides a buffer for flood control
• Provides additional wildlife habitat
• Working successfully for the Irvine Ranch Water
  District
• San Joaquin Wildlife Sanctuary
• Just announced that a land parcel at the El Toro
  Base is being earmarked as a structured wetlands