[Code of Federal Regulations]
[Title 33, Volume 2]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 33CFR159.121]

[Page 529]
 
                TITLE 33--NAVIGATION AND NAVIGABLE WATERS
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 159--MARINE SANITATION DEVICES--Table of Contents
 
              Subpart C--Design, Construction, and Testing
 
Sec. 159.121  Sewage processing test.

    (a) The device must process human sewage in the manner for which it 
is designed when tested in accordance with this section. There must be 
no sewage or sewage-treating chemicals remaining on surfaces or in 
crevices that could come in contact with a person using the device or 
servicing the device in accordance with the instructions supplied under 
Sec. 159.57(b)(7).
    (b) During the test the device must be operated and maintained in 
accordance with the manufacturer's instructions. Any initial start-up 
time specified by the manufacturer must be allowed before test periods 
begin. For 1 hour of each 8-hour test period, the device must be tilted 
to the maximum angles specified by the manufacturer under Sec.Sec. 
159.55 and 159.57.
    (c) Except for devices described in paragraph (d) of this section, 
the devices must process and discharge or store human sewage over at 
least an 8-consecutive hour period on at least 10 days within a 20-day 
period. The device must receive human sewage consisting of fecal matter, 
urine, and toilet paper in a ratio of four urinations to one defecation 
with at least one defecation per person per day. Devices must be tested 
at their average rate of capacity as specified in Sec. 159.57. In 
addition, during three periods of each day the system must process 
sewage at the peak capacity for the period of time it is rated at peak 
capacity.
    (d) A device that processes and discharges continuously between 
individual use periods or a large device, as determined by the Coast 
Guard, must process and discharge sewage over at least 10-consecutive 
days at the average daily capacity specified by the manufacturer. During 
three periods of each day the system must process sewage at the peak 
capacity for the period of time it is rated at peak capacity. The sewage 
for this test must be fresh, domestic sewage to which primary sludge has 
been added, as necessary, to create a test sewage with a minimum of 500 
milligrams of suspended solids per liter.

[CGD 73-83, 40 FR 4624, Jan. 30, 1975, as amended by USCG-2002-12471, 67 
FR 41333, June 18, 2002]