b) Record the septage volume discharged to the plant.
These records are important for reviewing historical septage
flows projecting future flows and for estimating the discharge
fee to the hauler.
c) Take a grab sample of each truck load and analyze
it, or refrigerate the sample for possible future analyses.
d) Supervise the hauler's activities during the
discharge to the receiving facilities.
Sampling. A sample should be taken from each load
of septage discharged to the plant. The purpose for the sampling
is to allow for immediate analysis of the septage if the waste is
suspect; to discourage the discharge of unacceptable waste by
openly displaying to the hauler that the septage is monitored;
and to establish a trend analysis of septage characteristics by
periodically analyzing samples.
In most cases, the sample would not need to be analyzed
immediately. It can be refrigerated for a period equal to the
detention time through the treatment plant. In some cases,
however, especially where effluent discharge limits are very
stringent, a pH test, toxicity screen, and microscopic
examination to confirm the presence of biological activity should
be performed on each load.
records related to the discharge and treatment of septage should
a) The origin of the septage, including the name,
address, and contact for the owner of the septic tank that was
The volume of each load
c) The results of any analyses performed on the
septage and a summary of any unusual septage characteristics
d) The name of the hauling company and driver, permit
number (if applicable), and time of arrival.
Modes of Septage Treatment. Because of the
similarities in the characteristics of septage and domestic
wastewater, the same treatment processes can be used to treat
both wastes. The septage can be added to the liquid stream,