Stream sampling was eliminated due to implementation of monthly sampling by the Central Coast Water Board as part of its Coastal Confluences Ambient Monitoring Program (CCAMP); mussel sampling frequency was reduced from twice per year to an annual wet-season index period; measurements of Diazinon, Chlorpyrifos and alkylated PAHs were eliminated; measurements of the flame retardants polybrominated diphenylethers (PBDEs); non-stick coatings perfluorinated compounds (PFCs) were added; and CCLEAN effluent pollutant data began to be used for NPDES permit compliance.