Version: 1.0

• Aerated tank and Surface impoundment modules
  • Two sediment compartments (unconsolidated and consolidated) to better account for sediment compaction and chemical stratification
  • BOD consumption and biomass generation temperature-dependent
• Surface impoundment module
  • Added time dependent solution for batch and plug-flow units to account for varying aeration and residence time
• Human risk module
  • Replaced module with computationally more efficient version
• Modified software to function with different operating systems (MS-Windows 9x/NT/2000)
• Extensive system-wide testing and quality controls
  • Internal testing
  • Independent testing
• Completed peer review of modules

Version: 0.98r Beta

• Modified ELP2 processor (file ELP2.EXE) to correct error when aggregating risks across pathways.

Version: 0.98

• Reporting of additive risk and additive hazard quotient pathways.

Version: 0.95

• Changed file GRF/ER.DIC to add labels to Ecological Risk output
• Changed program executable EcoRisk5.exe to a version that reports labels
• Changed program executable Elpl1.exe to a version that reads additional labels
• Changed file HWIRCP.DLL to report ChemFractNeutral
• Changed program executable Vadose.exe to stop use of aerobic biodegradation rates
• Changed program executable ExamsIO.exe for file creation for EXAMS
• Changed program executable Aquifer1.exe to implement a lowbound on reporting
• Changed data base betav25r.mdb (note name difference, was betav24.mdb):
  • AquDoFract in the Aquifer data group located in the National data table was set to true in the logical value column
  • AquDoHetero in the Aquifer data group located in the National data table was set to true in the logical value column
• Included link to full model system documentation world wide web (WWW) site

Version: 0.90

• First release through CEAM: Wednesday, 27 October 1999.