Step 1: Determine CTcalc/CTrequired for each sequence.
Step 2: Add the CTcalc/CTrequired values together.
Step 3: If the sum of successive CTcalc/CTrequired values is greater than or equal to 1.0, the Giardia lamblia inactivation requirement has been achieved.
LRVDIT = LOG10 (Qp /(VCF x Qbreach)).
Where:
LRVDIT = the sensitivity of the direct integrity test;
Qp = total design filtrate flow from the membrane unit;
Qbreach = flow of water from an integrity breach associated with the smallest integrity test response that can be reliably measured; and
VCF = volumetric concentration factor. The volumetric concentration factor is the ratio of the suspended solids concentration on the high pressure side of the membrane relative to that in the feed water.
LRVDIT = LOG10(Cf)-LOG10(Cp).
Where:
LRVDIT = the sensitivity of the direct integrity test;
Cf = the typical feed concentration of the marker used in the test; and
Cp = the filtrate concentration of the marker from an integral membrane unit.
Number of People Served by the Water System - Number of Standard Monitoring Sites
>100,000 - 100
10,001 to 100,000 - 60
3,301 to 10,000 - 40
501 to 3,300 - 20
101 to 500 - 10
[LESS THAN EQUAL TO]100 - 5
Number of People Served by the Water System - Number of Reduced Monitoring Sites
>100,000 - 50
10,001 to 100,000 - 30
3,301 to 10,000 - 20
501 to 3,300 - 10
101 to 500 - 5
[LESS THAN EQUAL TO]100 - 5
Number of people served by the water system - Number of sample locations
>100,000 - 25
10,001-100,000 - 10
3,301 to 10,000 - 3
501 to 3,300 - 2
101 to 500 - 1
<100 - 1
Number of People Served by the Water System - Reduced Number of Sample Sites
>100,000 - 10
10,001-100,000 - 7
3,301 to 10,000 - 3
501 to 3,300 - 2
101 to 500 - 1
<100 - 1
Or. Admin. Code § 333-061-0036
To view attachments referenced in rule text, click here to view rule.
Statutory/Other Authority: ORS 448.131
Statutes/Other Implemented: ORS 448.131, 448.150 & 448.273