Chapter 10: On-Site Wastewater Treatment. 1  community or private drinking water supplies are not threatened; 2  direct human exposure is not possible; 3  waste is inaccessible to vectors, insects, rodents, or other possible carriers; 4  all environmental laws and regulations are complied with; and. 5  odor or aesthetic nuisances are not created.
The last major use of the comma, semicolon, and period hierarchy is in Erlang (1986), where commas separate expressions; semicolons separate clauses, both for control flow and for function clauses; and periods terminate statements, such as function definitions or module attributes, not the entire program.
In each of these examples, a period could be used instead of the semicolon, though the effect of balance might be diminished. Also, because in each case the two clauses are short and contain no other marks of punctuation, a comma might replace the semicolon.