The Hawaiian Electric Company Inc. (HECO), under requirements of National Pollutant Discharge Elimination System (NPDES) Permit HI0000019, Section C.5, annually conducts and reports results of a monitoring program for waters receiving effluent from the Kahe Generating Station, O'ahu, Hawai'i. This data set includes daily water discharge and unadjusted intake temperature data logs collected as part of this monitoring program from 1992 to 1997 (Appendix B in annual reports). These data are filed under NODC Accession # 9900021.
National Pollutant Discharge Elimination System (NPDES) permit HI0000019 authorizes HECO to discharge waste water from the Kahe Generating Station. A provision of this permit is that HECO follow a marine monitoring program and documents marine effects of cooling-water discharge from Kahe Generating Station Units 1 through 6. Specific studies covered under this program include monitoring of temperature elevations of thermal effluents, quantities of sediment entrainment and throughput, and reef coral communities. An annual report of the data, analysis, and findings of these monitoring studies is submitted to the State Department of Health (DOH) Director and Environmental Protection Agency (EPA) Regional Administrator no later than March 1 of each year.
Since January 1, 1986, HECO has used adjusted intake water temperatures as the reference against which temperature elevations of the thermal effluent are measured. Intake temperatures are adjusted downward by 0.42 C' to determine the reference temperature. Based on over 10 years of temperature records collected at an ambient temperature control station, it was determined that intake temperatures exceeded nearshore ambient bottom temperatures by this amount. Daily records were kept of maximum, minimum, mean effluent, and mean influent temperatures. Intake and discharge temperatures were recorded continuously using a Foxboro ERB strip chart recorder and Dynatherm* resistance bulbs. Note to users: The complete 1996 Kahe Generating Station annual report is available under NODC Accession # 9900012, 'Kahe Generating Station NPDES Annual Report for 1996.doc' Resource Description: NODC Accession # 9900021
ground condition
None. NOAA and NODC would appreciate recognition as the resource from which these data were obtained in any publications and/or other representations of these data.
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HECO can be contacted directly through website
Hawaiian Electric Company Environmental Department
After 1973, HECO's Environmental Department conducted extensive NPDES marine monitoring studies to determine the conditions of the Kahe nearshore environment during the station's expansion to six generating units and the relocation of the Kahe shoreline outfall to its present offshore site (Coles and McCain, 1973; Coles and Fukuda, 1975, 1983, 1984; Environmental Department, 1976; McCain, 1977; Coles, 1979, 1980; Coles et al., 1981, 1982, 1985, 1986; Fukuda and Oda, 1987; Environmental Department, 1988, 1989, 1990, 1991, 1992, 1993 1994 and 1995). Several of these reports also document the impacts of major storms on the Kahe nearshore environment that occurred in 1980, 1982 and 1992, and the subsequent recovery of the storm-damaged areas that are influenced by power station operation. These NPDES monitoring reports were submitted to the HI State Department of Health upon completion and are herewith incorporated by reference. This investigation is a continuation of the monitoring programs documented in the referenced reports.
See the complete 1996 Kahe Generating Station annual report, available under NODC Accession # 9900012, 'Kahe Generating Station NPDES Annual Report for 1996.doc'
As mandated by NPDES. See the complete 1996 Kahe Generating Station annual report, available under NODC Accession # 9900012, 'Kahe Generating Station NPDES Annual Report for 1996.doc'
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Not applicable
Data tables of temperature values and associated information, including date, intake, temperature readings in degrees Centrigrade and Farenheit.
Download through via NODC's "Data Direct" system at the NODC homepage at www.nodc.noaa.gov or contact NODC for custom order. (When requesting data from the NODC, the desired data set may be referred to by the 7-digit number given in the RESOURCE DESCRIPTION field of this metadata record)
Contact the NODC User Services Group via phone/FAX/E-mail: nodc.services@noaa.gov
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