§ 51.028 EXCESSIVE CONCENTRATIONS OF CERTAIN DISCHARGES.
   (A)   Discharges from each separate discharge of a user, as measured under the provisions of this chapter, shall not contain in excess of the following concentrations based upon a 24-hour composite sample. Multiple industrial wastewater discharges from a permitted facility may be combined in a flow weighted manner to determine compliance with the following limitations for a 24-hour composite sample.
   (B)   Discharges from Amoco’s Wood River Facility, as measured under the provisions of this section, shall not contain in excess of the following concentrations based on a 24-hour composite sample. A portion of the discharge from Amoco Petroleum Additives Company is subject to National Categorical Pretreatment Standards for Organic Chemicals, Plastics, and Synthetic Fibers (OCPSF), discharge limitations of which are located in 40 C.F.R. part 414. The following limitations apply to Amoco’s Wood River Facility’s dedicated piping to the influent of the Parshall Flume before entering the process pump station.
Pollutant
Maximum Concentration (mg/l)
Pollutant
Maximum Concentration (mg/l)
Aluminum
15.0
Arsenic
0.1
Barium
4.0
Benzene
0.5
Cadmium
0.03
Chromium (total)
2.0
Chromium, hexavalent
0.2
Copper
0.6
Cyanide
0.1
Fluoride
30.0
Iron (total)
6.5
Lead
0.2
Manganese
5.0
Mercury
0.0005
Nickel
1.0
Oils (hexane soluble or equivalent)
75.0
pH (permissible range, no averaging)
5.0—90.0
Phenols
   Summer (May—October)
50.00
   Winter (November—April)
25.00
Selenium
1.0
Silver
0.2
Zinc
1.0
 
   (C)   Discharges from Amoco Oil Company, as measured under the provisions of this section, shall not contain in excess of the following loadings (in pounds per day) based on a 24-hour composite sample and the average daily flowrate. Also, the concentration shall not exceed the concentration listed at any time. The following limitations apply to Amoco Oil’s discharge point to the POTW, before entering the aeration tank.
Pollutant
Max. Avg. Conc., mg/l
Maximum Load, lb/d
Pollutant
Max. Avg. Conc., mg/l
Maximum Load, lb/d
Aluminum
15.0
55.0
Arsenic
0.5
1.83
Barium
4.0
14.7
Benzene
15.0
55.0
Cadmium
0.03
0.110
Chromium (total)
2.0
7.34
Chromium (hexavalent)
0.2
0.734
Copper
0.6
2.20
Cyanide
0.1
0.367
Ethylbenzene
15.0
55.0
Fluoride
30.0
110.0
Iron (total)
30.0
110.0
Lead
0.2
0.734
Manganese
2.0
7.34
Mercury
0.0005
0.00183
Naphthalene
7.0
25.7
Nickel
0.5
1.83
Oils (hexane soluble or equivalent)
100.0
366.0
pH (permissible range, no averaging)
5.0 - 9.0
Phenols
 
 
   Summer (May—October)
50.0
183.0
   Winter (November—April)
25.0
92.0
Selenium
1.0
3.67
Silver
0.2
0.734
Tetrachloroethane
9.0
33.0
Toluene
40.0
147.0
Zinc
0.6
2.20
2,4-Dimethylphenol
9.0
33.0
 
   (D)   Discharge limitations for other industrial users will be determined by the city upon receipt of a request for an industrial wastewater discharge permit application.
(Prior Code, § 51.038) (Ord. 88-9, passed 9-20-1988; Ord. 91-7, passed 9-3-1991) Penalty, see § 51.999