Selecione números com mais de 4 casas decimais

DECLARE @tbl TABLE (val float)
INSERT INTO @tbl SELECT 1234.567
INSERT INTO @tbl SELECT 1234.5678
INSERT INTO @tbl SELECT -1234.5678
INSERT INTO @tbl SELECT 1234.56789

SELECT *
from @tbl
where (((val*10000) - CONVERT(INT,(val*10000))) <> 0)