173-219-320  <<  173-219-330 >>   173-219-340

WAC 173-219-330

Performance standards.

Reclaimed water performance standards. All Class A and Class B reclaimed water at a minimum must meet the technology-based performance standards listed in Table 1 and Table 2 for the class of reclaimed water generated at the facility. Compliance shall generally be measured at the end of treatment, however, the reclaimed water permit may specify alternative monitoring locations and water quality limits to ensure compliance with performance standards, and any additional use based requirements as listed in Table 3.
Table 1: Minimum Biological Oxidation Performance Standards
Biological Oxidation
Parameter1
Minimum Biological Oxidation Performance Standard
Dissolved Oxygen
Must be measurably present
BOD5
Monthly Average
Weekly Average
30 mg/L
45 mg/L
CBOD5
25mg/L
40 mg/L
TSS
30 mg/L
45 mg/L
 pH
Minimum
Maximum
6 s.u.
9 s.u.
pH (Groundwater recharge)
6.5 s.u.
8.5 s.u.
 
1 The parameter must be measured at the end of the unit process or alternative monitoring location as set in a reclaimed water permit.
Table 2: Class A and B Performance Standards
Coagulation/Filtration
Parameter1
Class A Reclaimed Water
Class B Reclaimed Water
Turbidity2
Monthly Average
Sample Maximum
Monthly Average
Sample Maximum
2 NTU
5 NTU
Not Applicable
Not Applicable
Membrane Filtration
 
Class A Reclaimed Water
Class B Reclaimed Water
Turbidity2
Monthly Average
Sample Maximum
Monthly Average
Sample Maximum
0.2 NTU
0.5 NTU
Not Applicable
Not Applicable
Disinfection
 
Class A Reclaimed Water
Class B Reclaimed Water
Total Coliform
7-Day Median
Sample Maximum
7-Day Median
Sample Maximum
2.2 MPN/100 mL or CFU/100 mL
23 MPN/mL or CFU/mL
23 MPN/mL or CFU/mL
240 MPN/mL or CFU/mL
Virus Removal
See disinfection process
standards in WAC 173-219-340
Not Applicable
Not Applicable
Denitrification3
 
Class A Reclaimed Water
Class B Reclaimed Water
Total Nitrogen
Monthly Average
Weekly Average
Monthly Average
Weekly Average
10 mg/L
15 mg/L
Not Applicable
Not Applicable
 
1 The parameter must be measured at the end of the unit process or alternative monitoring location as set in a reclaimed water permit.
 
2 Sample maximum for turbidity is the highest value for the day that lasts longer than five minutes.
 
3 Not applicable for beneficial uses 1-13 listed on Table 3: Use-Based Requirements.
[Statutory Authority: RCW 90.46.015. WSR 18-03-166 (Order 06-12), § 173-219-330, filed 1/23/18, effective 2/23/18.]
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