EPA/600/2-76/006Design and Testing of a Prototype Automatic Sewer Sampling System (EPA/600/2/76/006) March 1976
A brief review of the characteristics of storm and combined sewer flows is given, followed by a discussion of the requirements for equipment to sample them, noting features that are desirable in such equipment and problem areas. The prototype sampler is described from an installation and operation viewpoint, and the results of preliminary field testing are discussed. The device was also tested under controlled laboratory conditions and found to be capable of gathering reasonably representative samples (i.e., within 10%) over a fairly wide range of flow characteristics.
You will need Adobe Reader to view some of the files on this page.
See EPA's PDF page.