| |
USEPA UVDGM |
DVGW |
| Who is permitted to carry out the UV system validation? |
Anyone who can prove that the validation protocol outlined in the UVDGM has been followed |
Only a DVGW certified facility |
| What is the result of the validation procedure? |
A detailed report proving the UVDGM protocol has been followed |
Certification of the validated UV system |
| What UV dose is required to achieve validation? |
As much as is required to inactivate a given pathogen by a specified log reduction. (see the section on UV Lamp Characteristics Comparison) |
40mj/cm2 RED. This is based on the principal that almost all common water-borne pathogens will experience at least a 4-log reduction at this dose. DVGW don't care about the pathogen or the log reduction, they believe a UV dose of 40mj/cm2 is enough to inactivate most "bugs" by 4 log, and so they only require the UV system to deliver this dose. |
