Pretreatment Requirements

Presently there are no EPA pretreatment standards for the oil and gas extraction (oilfield) point source category. The EPA pretreatment standards for discharge from existing and new petroleum refining facilities to publicly owned treatment works include 100 mg/L each for oil and grease (O&G) and ammonia (as N). For new facilities a total chromium concentration of 1 mg/L for the cooling tower discharge part of the refinery effluent is also required (40 CPR Part 419).

In addition to meeting the EPA pretreatment standards, indirect dischargers are required to meet individual municipal pretreatment limits. Publicly owned treatment works establish limits

Table 13 Effluent Standards for Five Subcategories of the Petroleum Refining Point Source Category

Effluent limitation (daily average for 30 consecutive days, in lbs/1000 bbl _of feedstock)_

Table 13 Effluent Standards for Five Subcategories of the Petroleum Refining Point Source Category

Effluent limitation (daily average for 30 consecutive days, in lbs/1000 bbl _of feedstock)_

Parameters

Topping

Cracking

Petroleum

Lube

Integrated

BPT

NS

BPT

NS

BPT

NS

BPT

NS

BPT

NS

bod5

4.25

2.2

5.5

3.1

6.5

4.1

9.1

6.5

10.2

7.8

TSS

3.6

1.9

4.4

2.5

5.25

3.3

8.0

5.3

8.4

6.3

COD

31.3

11.2

38.4

21.0

38.4

24.0

66.0

45.0

70.0

54.0

O&G

1.3

0.70

1.6

0.3

2.1

1.3

3.0

2.0

3.2

2.4

Phenolic

0.027

0.16

0.036

0.020

0.0425

0.027

0.065

0.043

0.068

0.051

compounds

Ammonia as N

0.45

0.45

3.0

3.0

3.8

3.8

3.8

3.8

3.8

3.8

Sulfide

0.024

0.012

0.029

0.017

0.035

0.022

0.053

0.035

0.056

0.042

Total

0.071

0.037

0.088

0.049

0.107

0.068

0.160

0.105

0.17

0.13

chromium

Hexavalent

0.0044

0.0025

0.0056

0.0032

0.0072

0.0044

0.160

0.0072

0.011

0.008

chromium

Note: pH (within the range of 6.0 to 9.0); BPT incorporates BAT and BCT; BPT, best practicable control technology; NS, new source performance standards; BOD, biochemical oxygen demand; TSS, total suspended solids; COD, chemical oxygen demand; O&G, oil and grease; BAT, best available technology economically achievable; BCT, best conventional pollutant control technology.

Source: From Ref. 40 CFR, Part 419, 1988.

Note: pH (within the range of 6.0 to 9.0); BPT incorporates BAT and BCT; BPT, best practicable control technology; NS, new source performance standards; BOD, biochemical oxygen demand; TSS, total suspended solids; COD, chemical oxygen demand; O&G, oil and grease; BAT, best available technology economically achievable; BCT, best conventional pollutant control technology.

Source: From Ref. 40 CFR, Part 419, 1988.

to control pollutants that could be deleterious to conventional biological treatment systems or that could cause the municipality to violate receiving water standards. Table 14 shows the industrial effluent limits established by the City of San Jose, CA (San Jose Municipal Code, 1988). This city has also adopted an effluent toxicity requirement for industrial dischargers using the public sewer. Discharges are not to exceed a median threshold limit of 50%.

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