1	HB City Council Parkside 10/21/2002 Robert W. Harrison, PE President, Conex Systems Amigos de Bolsa Chica
2	Slater Pump Station Areas of Concern Flow volume Flow volume will increase substantially Equipment additions & upgrades required Increased maintenance fees in later years Simulation Study Concentrated on flow volume Attempt to show a reduction in flood plain Showed reduction not dependent on Parkside development Validity dependent on Accuracy of the model Accuracy of the input data Has the Planning Department Staff validated the model? How? Bacteriological discharge Not addressed
3	County of Orange HCA/Environmental Health Division Bolsa Chica (BC)/East Garden Grove Wintersburg Channel (EGGWC) Bacteriological Monitoring Total Coliform (TC), E.Coli (EC), Enterococcus (ENT) Most Probable Number (MPN) per 100 ml Sample
4	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 What treatment processes will be used to reduce these levels? The Wintersburg Channel empties into outer Bolsa Chica Bay and then through Huntington Harbour increasing pollutant levels in both
5	Land History Wetlands Origins Historical maps show area as a wetlands Original ocean inlet was through the beach south of Warner Avenue Much of the land is below sea level Land elevation requires substantial fill 5½ to 10½ feet Remains of the original wetlands still exists Salt tolerant plants are still present Pickle Weed Wetlands validation Validate if the anaerobic line still exists defining a wetlands Core samples are required, but never allowed to be taken
6	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