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Section 1
1.10 EPA Mode
Page 22
EPA Mode
The selection of the EPA application allows the analyzer to be operated
compliant with the requirements of the EPA regulation (Part IV- Environmental
Protection Agency/40 CFR Parts 9, 141 & 142). TOC
mg/L of the incoming raw water source. TOC
mg/L of the processed (distributed) water. The removal percentage (REM%)
is calculated as follows:
(
TOC
TOC
–
1
×
------------------------------------------ -
REM%
=
100
TOC
1
Where TOC
is measured a period of at least the retention time earlier than
1
the measurement of TOC
the analyzer goes offline. Only the last Stream 2 TOC value is recorded for the
REM% calculation, however the analyzer records a history of the Stream 1
TOC values.
The pass or fail criteria is based on the manually entered incoming water
alkalinity value and the analyzed incoming source water TOC concentration
(TOC
). A pass/fail can be determined and shown on the normal operating
1
screen according to the value of the required removal percentage. The
following table details how the pass/fail criteria is established from the entered
alkalinity (as mg/L C) and the two TOC readings.
Table 1 Establishing the Pass/Fail Criteria
Source Water TOC mg/L (Stream 1)
>2.0 – 4.0
>4.0 – 8.0
>8.0
Table 2 Hardware Requirements
4195-1010-EPA
CRS
4195-1020-EPA
CRS
4195-1030-EPA
CRS
4195-3010-EPA
SS
4195-3020-EPA
SS
4195-3030-EPA
SS
is the TOC concentration in
2
)
2
. The TOC data points are retained at the time that
2
Source Water Alkalinity
0--60
Removal %
35
45
50
5 mg/L, 1 UV, 2 STREAM
10 mg/L, 1 UV, 2 STREAM
25 mg/L, 1 UV, 2 STREAM
5 mg/L, 1 UV, 2 STREAM
10 mg/L, 1 UV, 2 STREAM
25 mg/L, 1 UV, 2 STREAM
is TOC concentration in
1
> 60 – 120
>120
Removal %
Removal %
25
15
35
25
40
30
UVTOCIntroduction.fm
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