Septic Systems for Small Shops & Offices




The drawing package contains 53 construction drawings of 13 septic system designs for eight different
commercial sites. This module includes official tables for estimating daily sewage volumes for different
types of non-residential operations. We explain how to add a washroom to a farm outbuilding, how to
repair a commercial system, adding a home business to a residential septic system, designing a septic
system for a coffee shop, a rural business office, and more. We include the charts and the explanation
of how to use them to calculate sewage volumes for small businesses on septic systems, including rates
for employees, customers, and commercial water‐consuming activities.