Oklahoma Administrative Code
Title 252 - Department of Environmental Quality
Chapter 628 - Indirect Potable Reuse for Surface Water Augmentation
Appendix 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