La. Admin. Code tit. 51 § XII-113

Current through Register Vol. 50, No. 11, November 20, 2024

Section XII-113 - Engineers Report

A. The engineer's report for water supply system improvements shall, where applicable, present the following information.

1. General information, including:

a. description of the existing water works and sewerage facilities;

b. identification of the municipality or area served;

c. name and mailing address of the owner or official custodian; and

d. imprint of professional engineer's seal or conformance with engineering registration requirements of the Louisiana Professional Engineering and Land Surveying Board.

2. Extent of water supply system, including:

a. description of the nature and extent of the area to be served;

b. provisions for extending the water supply system to include additional areas;

c. appraisal of the future requirements for service, including existing and potential industrial, commercial, institutional, and other water supply needs.

3. Justification of the Project. Where two or more solutions exist for providing public water system facilities, each of which is feasible and practicable, discuss the alternatives. Give reasons for selecting the one recommended, including financial considerations, operational requirements, operator qualifications, reliability, and water quality considerations.

4. Soil, groundwater conditions, and foundation problems, including a description of:

a. the character of the soil through which water mains are to be laid;

b. foundation conditions prevailing at sites of proposed structures;

c. the approximate elevation of ground water in relation to subsurface structures.

5. Water use data, including:

a. a description of the population trends as indicated by available records, and the estimated population which will be served by the proposed water supply system or expanded system 20 years in the future in 5 year intervals or over the useful life of critical structures and/or equipment;

b. present water consumption and the projected average and maximum daily demands, including fire flow demand (Subchapter C);

c. present and/or estimated yield of the sources of supply;

d. unusual occurrences;

e. current percent of unaccounted water for the system and the estimated reduction of unaccounted for water after project completion if applicable, i.e., project is to replace aged water mains, leaking storage, or other improvements that will result in reduced water loss.

6. Flow requirements, including:

a. hydraulic analyses based on flow demands and pressure requirements (see §237 A)

b. fire flows, when fire protection is provided, meeting the recommendations of the Insurance Services Office or other similar agency for the service area involved.

7. Description of the proposed source or sources of water supply to be developed, the reasons for their selection, and provide information as follows:

a. Surface water sources, including:

i. hydrological data, stream flow and weather records;

ii. safe yield, including all factors that may affect it;

iii. maximum flood flow, together with approval for safety features of the spillway and dam from the state health officer;

iv. description of the watershed, noting any existing or potential sources of contamination (such as highways, railroads, chemical facilities, land/water use activities, etc.) which may affect water quality;

v. summarized quality of the raw water with special reference to fluctuations in quality, changing meteorological conditions, etc.

vi. source water protection issues or measures, including erosion and siltation control structures that need to be considered or implemented.

b. Groundwater sources, including:

i. sites considered;

ii. advantages of the site selected;

iii. elevations with respect to surroundings;

iv. probable character of formations through which the source is to be developed;

v. geologic conditions affecting the site, such as anticipated interference between proposed and existing wells;

vi. summary of source exploration, test well depth, and method of construction; placement of liners or screen; test pumping rates and their duration; water levels and specific yield; water quality;

viii. sources of possible contamination such as sewers and sewage treatment/disposal facilities, highways, railroads, landfills, outcroppings of consolidated waterbearing formations, chemical facilities, waste disposal wells, agricultural uses, etc.;

ix. wellhead protection measures being considered (see §169 of this Part).

8. Proposed treatment processes, including:

a. a summary establishing the adequacy of proposed processes and unit parameters for the treatment of the specific water under consideration. Bench scale test, pilot studies, or demonstrations may be required to establish adequacy for some water quality standards.

b. Alternative methods of water treatment and chemical use should be considered as a means of reducing waste handling and disposal problems.

9. Sewerage System Available. Describe the existing sewerage system and sewage treatment works, with special reference to their relationship to existing or proposed water supply system structures which may affect the operation of the water supply system, or which may affect the quality of the supply.

10. Waste disposal, including:

a. Discuss the various wastes from the water treatment plant, their volume, proposed treatment and points of discharge.

b. If discharging to a sanitary sewerage system, verify that the system, including any lift stations, is capable of handling the flow to the sewage treatment works and that the treatment works is capable and will accept the additional loading.

11. Automation, including:

a. supporting data justifying automatic equipment, including the servicing and operator training to be provided.

b. Manual override must be provided for any automatic controls.

c. Highly sophisticated automation may put proper maintenance beyond the capability of the plant operator, leading to equipment breakdowns or expensive servicing. Adequate funding shall be assured for maintenance of automatic equipment.

12. Project sites, including:

a. discussion of the various sites considered and advantages of the recommended ones;

b. the proximity of residences, industries, and other establishments;

c. any potential sources of pollution that may influence the quality of the supply or interfere with effective operation of the water supply system, such as sewage absorption systems, septic tanks, privies, cesspools, sink holes, sanitary landfills, refuse and garbage dumps, etc.

13. Financing, including:

a. estimated cost of integral parts of the system, broken down by dollar amount or percentages for source development, storage, distribution mains, pumping, transmission mains, treatment, and planning (including all soft costs);

b. detailed estimated annual cost of operation;

c. proposed methods to finance both capital charges and operating expenses.

d. Summarize planning for future needs and services.

La. Admin. Code tit. 51, § XII-113

Promulgated by the Department of Health, Office of Public Health, LR 44298 (2/1/2018), effective 8/1/2018.

AUTHORITY NOTE: Promulgated in accordance with the provisions of R.S. 40:4.A.(8), 40:4.13.D.(1)(2) and 40:5.A.(2)(3)(5)(6)(7)(17).