La. Admin. Code tit. 33 § IX-1311

Current through Register Vol. 50, No. 6, June 20, 2024

Section IX-1311 - Instructions for Completing Treatment Works Treating Domestic Sewage Annual Fee Rating Worksheet

A. Facility Complexity Designation

1. Determine the specific industrial category applicable to the facility.

2. From the permit application, determine SIC codes. Also determine processes and products reported. Compare this information to LAC 33:IX.1319 to determine the applicable industrial category and the related complexity designation. When more than one category applies, select the one with the highest complexity designation. Record the SIC code applicable to the category selected in the first SIC code blank and all other reported SIC codes in the second blank. Record the SIC title.

3. Check the applicable complexity designation and record the associated points in the complexity points blank.

NOTE: Any industrial category not listed in LAC 33:IX.1319 is automatically assigned a Complexity Designation I except under the circumstances noted in LAC 33:IX.1309.L.2.

4. The SIC codes listed in the tables are not exhaustive and any questions concerning the appropriate SIC code or complexity designation for a particular facility will be decided by the administrative authority.

B. Flow Volume and Type

1. Determine the wastewater type and average discharge volume.

2. Review the permit application to determine the composition of the wastewater discharge(s). If there are multiple discharges, the composite of all discharges should be used. Compare the relative magnitudes of process wastewater, noncontact cooling water and other wastewaters with the definitions of wastewater types in Table 1 below, and select the appropriate wastewater type (select only one type).

Table 1 Types of Wastewater
Wastewaters are divided into three types based on their relative pollution potential.
Type I	Type I wastewaters are relatively uncontaminated. They include noncontact cooling water only, or mixed flows which contain at least 90 percent noncontact cooling water and not more than 1 mgd of process wastewaters.
Type II	Type II wastewaters are the most contaminated. They include process wastewater flows or any mixed wastewaters containing more than 10 percent process wastewaters or containing more than 1 mgd of process wastewaters.
Type III	Type III wastewaters include sanitary wastewater, boiler blowdown, recirculating cooling system blowdown, water treatment wastewaters and relatively uncontaminated surface run-off (contaminated surface runoff should be considered process wastewater). Any mixture of these wastewaters is considered Type III. A mixture which includes noncontact cooling water is also Type III unless the noncontact cooling water exceeds 90 percent of the flow (Type I).

3. Determine the total daily average wastewater discharge to the receiving water based upon the information supplied to the department in the permit application. If there are multiple discharges, the total of all daily average discharges should be used. Under the selected wastewater type, where applicable, answer yes or no and complete the formula.

C. Traditional Pollutants

1. Review the permit to determine if BOD, COD, TSS and/or ammonia are limited. Points should only be assigned for these four parameters if they are limited in the permit. The permit limits used to determine pollutant loads should be those limits currently in effect. Add the daily average load limit for each parameter for all discharges.

2. Check the applicable load range for BOD and/or COD and record the highest associated points in the BOD or COD points blank. In some cases, oxygen demand may be limited by some parameter other than BOD or COD [i.e., ultimate oxygen demand (UOD), total organic carbon (TOC), or total oxygen demand (TOD)]. If this is the case, check the applicable load range in the BOD criterion and record the alternate parameter used in the blank indicated.

3. Check the applicable TSS and ammonia load ranges and record the associated points. An alternate nitrogen load parameter may be used in some cases when ammonia is not limited. If another nitrogen parameter is limited in the permit, check the appropriate load range in the ammonia criterion and record the alternate parameter used in the blank indicated.

4. Sum the totals A, B, and C and record the total pollution points in the space provided.

D. Potential Public Health Points

1. Determine if the receiving water is used for a municipal water supply.

2. Review the complexity designation assigned in LAC 33:IX.1311.A. If groups I or II were assigned, check the first complexity designation blank, record 0 points in the public health points blank and go to the next instruction.

3. If a higher complexity designation (III, IV, V, or VI) was assigned, then a determination if the receiving water is used as a drinking water supply source must be made. To qualify for points under this criterion, either the receiving water to which wastewater is discharged or a water body to which the receiving water is tributary must be used as a drinking water supply source within 50 miles downstream.

4. Check the appropriate complexity designation blank and record associated points in the public health points blank.

E. Major/Minor Facility Designation

1. Determine if the facility has been designated a major facility by the administrative authority. If the answer is YES, then check the appropriate blank and assign 25 points. If the answer is NO, then proceed to the next part.

2. Determine if the permitted effluent limitations assigned were based on water quality factors in the receiving water. Check the appropriate answer and assign the points required.

F. Total Rating Points. Sum the rating points assigned to each of the six sections and record the total in the total rating points blank.

La. Admin. Code tit. 33, § IX-1311

Promulgated by the Department of Environmental Quality, Office of Water Resources, LR 11:534 (May 1985), amended LR 14:627 (September 1988), LR 18:732 (July 1992), LR 24:327 (February 1998), amended by the Office of Environmental Assessment, Environmental Planning Division, LR 26:2549 (November 2000), amended by the Office of the Secretary, Legal Affairs Division, LR 35:1493 (August 2009).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2001 et seq., and in particular Section 2014(B)