Stormwater treatment apparatus and method

A method for purification and separation of a liquid, the method comprising:

• inputting the liquid into a receptacle through an inlet opening;
• interrupting the flow of the liquid around at least one inlet baffle after the inlet opening;
• communicating the liquid through an active pool to an outlet opening, the outlet opening smaller than the inlet opening;
• interrupting the flow of the liquid around at least one outlet baffle before the outlet opening;
• settling sediments from the flow in the active pool into at least one permanent pool, said permanent pool gravitationally below the active pool;
• and
• trapping materials heavier than water using at least one modular mid section of the receptacle, wherein the at least one mid section is in fluid communication with the inlet opening and the outlet opening and includes at least one baffle, the trapping of materials heavier than water being accomplished via the reduction of the rate of flow with the at least one baffle.

A method for purification and separation of a liquid, the method comprising:

• inputting the liquid into a receptacle through an inlet opening;
• communicating the liquid through an active pool to an outlet opening, the outlet opening defining a permanent pool level;
• reducing the flow rate of the liquid by directing said liquid around at least one inlet baffle after the inlet opening;
• reducing the flow of the liquid by directing said liquid around at least one outlet baffle before the outlet opening;
• and,
• settling sediments from the flow in the active pool into at least one inactive pool formed by at least a first pair of inactive pool baffles, each of said pair of inactive pool baffles extending upward from a bottom of said receptacle, but not above said permanent pool level, said inactive pool gravitationally below the active pool.