Okla. Admin. Code tit. 252, ch. 628, app A - IPR SOURCE WATER BENCHMARKS

Parameter	IPR Benchmark (µg/L unless otherwise noted)
1. GENERAL BENCHMARKS
CBOD5	5.0 mg/L daily maximum
Flow	Monitor continuously
PH	6.5 to 9.0 standard units
TOC	Monitor daily
TSS	5.0 mg/L daily maximum
Turbidity	Turbidity shall not exceed the following: * 2 NTU daily average; * 5 NTU > 5% of the daily maximum per month; or * 10 NTU daily maximum.
TRC or TRO	No measureable amount (<0.1 mg/L) daily maximum
2. PATHOGEN BENCHMARKS
Pathogens	Disinfection from secondary treated effluent to end of pipe discharge shall achieve: (1) 5-log removal or inactivation of adenovirus type 15; (2) 5-log removal or inactivation of Salmonella typhimurium; (3) 3-log removal or inactivation of Cryptosporidium oocysts; and (4) 3-log removal or inactivation of Giardia lamblia cysts.
Total coliform	No measurable amount (<2 per 100 milliliters)
3. PRIMARY BENCHMARKS
3.1 Non-Conservative STibstances
3.1.1 Disinfection Byproducts
Bromate	10
Chlorine Dioxide {as CIO2)	800
Haloacetic acids (HAAS)	60
Total Trihalomethanes (TTHMs)	80
3.1.2 Nutrients
Nitrate (as N)	10 mg/L
Nitrite (as N)	1 mg/L
3.2 Conservative Substances
3.2.1 Metals and Inorganics
Antimony	6
Arsenic	10
Barium	2,000
Beryllium	4
Chromium, Total	100
Fluoride	4,000
Selenium	50
Thallium	2
3.2.2 Organlcs
Benzene	5
Benzo{a)pyrene (PAHs)	0.2
Carbofuran	40
Carbon Tetrachloride	5
Chlorobenzene	100
1, 2-Dibromo-3-chloropropane (DBCP)	0.2
o-Dichlorobenzene	600
p-Dichlorobenzene	75
1, 2-Dichloroethane	5
1,1-Dichloroethylene	7
cis-1, 2-Dichloroethylene	70
trans-1, 2-Dichloroethylene	100
Dichloromethane	5
1, 2-Dichloropropane	5
Di(2 -ethyIhexy1)adipate	400
Di(2 -ethylhexyl)phthalate	6
Ethylbenzene	700
Ethylene Dibromide	0.05
Hexachlorocyclopentadiene	50
Pentachlorophenol	1
Styrene	100
Tetrachloroethylene	5
Toluene	1, 000
1, 2, 4-Trichlorobenzene	70
1, 1, 1-Trichloroethane	200
1, 1, 2-Trichloroethane	5
Trichloroethylene	5
Vinyl Chloride	2
Xylenes (Total)	10,000
3.2.3 Pesticides
Alachlor	2
Atrazine	3
2, 4-D	70
Dalapon	200
Dinoseb	7
Diquat	20
Endothall	100
Glyphosate	700
Heptachlor Epoxide	0.2
Lindane	0.2
Oxamyl (Vydate)	200
Picloram	500
Simazine	4
Toxaphene	3
2, 4, 5-TP (Silvex)	50
3.2.4 Radionuclides
Alpha particles	15 pCi/L
Beta particles and photon emitters	4 millirems per year
Radium 22 6 and Radium 22 8 (combined)	5 pCi/L
Uranium	30
4. IPR BENCHMARKS FOR ADDITIONAL CONSERVATIVE PARAMETERS
Chlorides	Calculated1
Sulfates	Calculated1
Total Dissolved Solids (TDS)	Calculated1
Aluminum	Calculated1 (2002)
Iron	Calculated1 (3002)
Manganese	Calculated1 (502)
5. IPR BENCHMARKS FOR NUTRIENTS
Total Nitrogen	8 mg/L monthly average; 12 mg/L daily maximum
Total Phosphorus	0.2 mg/L monthly average; 0.3 mg/L daily maximum
6. OTHER IPR BENCHMARKS
Foaming Agents	500

¹Effluent limitations shall be calculated in accordance with OAC 252:628-3-6.

²EPA recommendation for drinking water.

Notes

Okla. Admin. Code tit. 252, ch. 628, app A

Adopted by Oklahoma Register, Volume 35, Issue 24, September 4, 2018, eff. 9/15/2018