All that area east of a line commencing at the intersection of the Albany-Schenectady county line and Old State Road (Parkers Corners Road); thence easterly along Old State Road to Dunnsville Road; thence southerly along Dunnsville Road to the Altamont village line; thence counterclockwise along the Altamont village line to Route 156 (Altamont Road); thence southeasterly along Route 156 to Picard Road; thence southeasterly along Picard Road to Route 85A; thence southerly along Route 85A to Route 85; thence southerly and easterly along Route 85 to Route 43; thence southeasterly along Route 43 to Clarksville South Road; thence southerly along Clarksville South Road to Bennett Hill Road; thence southeasterly along Bennett Hill Road to Tarrytown Road; thence southeasterly along Tarrytown Road to Cedar Grove Road; thence southeasterly along Cedar Grove Road to Blodget Road; thence southerly along Blodget Road to Route 143; thence easterly along Route 143 to New Baltimore-Aquetuck Road; thence southeasterly along New Baltimore-Aquetuck Road to the Albany-Greene county line; except those areas delineated as Level III.