Composite Method

Note: EPA no longer updates this information, but it may be useful as a reference or resource.

This web site provides query access to over 200 million monitoring records originally reported to EPA via the Legacy STORET System.

Code	Description	Name
C	Samples collected continuously	Continuous
G	Samples are collected as a grab. The number comprising the sample may or may not be reported. If the number comprising the sample is reported the number will be stored in the Composite Grab Number column of the Sample table.	Grab
B	Samples are not collected continuously or as a grab. STORET used this code for replicate samples.	None of the above