Oklahoma Administrative Code › Title 252 - Department of Environmental Quality › Chapter 656 - Water Pollution Control Facility Construction Standards › Subchapter 3 - Permit Procedures › Section 252:656-3-4 - Engineering report

Current through Vol. 41, No. 20, July 1, 2024
(a) Applicants
				shall submit to DEQ two (2) copies of the engineering report for proposed new
				construction or modifications to sewage collection systems, or treatment works
				at least thirty (30) days prior to the submittal of plans and specifications.
				Applicants shall also submit a letter in which the applicant endorses the
				contents of each engineering report submitted to DEQ. For line extension and
				lift station construction, the submission of an Engineering Report Form,
				developed by DEQ, signed and sealed by an engineer licensed by the State of
				Oklahoma, may be submitted to meet the requirements of the necessary
				engineering report, unless a full engineering report is required by DEQ.
				Engineering reports shall include:
(1)
Volume and strength of sewage flow.
Establish the existing and
				anticipated design average and design peak flows and waste load for the
				existing and ultimate conditions. Include the basis for projecting initial
				current and/or future dry and wet weather flows and waste load for the
				existing, or initial, service area, and the anticipated future service area.
				For discharging facilities, the report must demonstrate that the proposed
				project complies with the design flow in the 208 Plan and other applicable
				OPDES permit limits.
(2)
Existing system.
Describe the existing system, including the need
				for the project related to health and safety, system operations and
				maintenance, and population growth. Issues that must be addressed include, but
				are not limited to, suitability of existing facilities for continued use,
				adequacy of water supply, history of compliance with state and federal
				requirements, and comparison of existing treatment units with state and federal
				design requirements.
(3)
Project description and alternatives.
The report must contain a
				description of the alternatives that were considered to meet the identified
				need. Provide a service area and project site maps showing the existing and
				proposed systems. The information must describe legal and natural boundaries,
				major obstacles, elevations, and any other information necessary to properly
				evaluate the project. Describe the proposed project and, where two or more
				solutions exist, discuss the alternatives including cost analysis and discuss
				the reasons for selecting the one recommended. For each alternative considered,
				the report must provide the following:
(A)
Description.
A description of the collection system, pumping
				systems, treatment, and discharge facilities associated with each alternative
				as applicable.
(B)
Design
				criteria.
The design parameters used for evaluation purposes.
(C)
Schematic.
A schematic
				diagram(s) of all existing and proposed treatment processes.
(D)
Land requirements.
The
				identification of sites and easements that will be used and whether the sites:
(i) are currently owned or leased by the
				applicant, or
(ii) will be acquired
				or leased by the applicant.
(E)
Construction problems.
A
				discussion of concerns such as subsurface rock, high water table, limited
				access, or other conditions that may affect the cost of construction or the
				operation of the facility.
(F)
Advantages and disadvantages.
A description of the ability of each
				alternative to meet the owner's needs, address violations cited in any
				enforcement orders, satisfy public and environmental concerns, and comply with
				regulatory requirements. The report must demonstrate the compatibility of each
				alternative with existing, comprehensive, and area-wide development plans.
				Provide a short description of environmental impacts that may preclude any
				alternatives.
(G)
Selected
				alternative.
A complete description of the proposed project based on the
				general description presented in the evaluation of alternatives. The report
				must show that the proposed project will comply with all the requirements of
				this Chapter. At a minimum, the following information must be included:
(i)
Treatment.
A description of
				the processes, including biosolids management, in detail and the identification
				of the location of the plant and the site of any discharges; a status of
				compliance with the 208 Plan, and if applicable, include current revisions with
				copy of DEQ approval letter, if approved in the current 208 Plan.
(ii)
Pumping stations.
The size,
				type, location and any special power requirements, including provisions for
				emergency operations, of all pumping stations.
(iii)
Collection system layout.
Identify general location of line improvements, including: lengths, sizes and
				key components.
(iv)
Calculations.
Provide supporting calculations in sufficient detail
				to demonstrate compliance with DEQ design requirements to assure adequate
				capacity for the collection and treatment system as a whole to transport and
				treat the wastewater or reclaimed water. For collection system projects, the
				submittal must include a map with a list of manholes and pipes and the
				associated characteristics, such as elevation of inverts, pipe diameter, pipe
				segment length, and other information necessary to evaluate the project. The
				report must provide assurance that the receiving collection and treatment
				systems have adequate capacity.
(4)
Construction sequence.
A
				description of the sequence of construction and steps needed to maintain
				compliance during construction. If the project is not to be completed in one
				sequence, then provide details of the phases.
(5)
Site.
Describe the
				topography, soils, geologic conditions, depth to bedrock, groundwater level,
				floodway or floodplain considerations, and other pertinent site information.
				The project must be constructed on the site consistent with approved plans.
				Include 6 months of data on the groundwater level. Provide soil boring
				information pursuant to OAC
				252:656-11-3(a)
				for projects that include lagoons or other non-industrial
				impoundments.
(6)
Water
				supply.
Identify surface water intakes within five (5) miles of the
				discharge and known public and private water wells within three hundred feet
				(300').
(7)
Receiving
				stream.
Identify the receiving stream and its wasteload requirements
				according to the Water Quality sections of OAC 252:606 and Oklahoma's Water
				Quality Management Plan (208 Plan).
(8)
Disposition of biosolids.
Discuss the available alternatives for biosolids reuse and/or disposal (OAC
				252:606 and OAC 252:515). Submit a sludge management or sludge disposition plan
				to DEQ for approval. All biosolids that will be land applied and/or disposed in
				a landfill must comply, at a minimum, with the Class B pathogen reduction
				requirements contained at 40 CFR, Part 503 , adopted by reference at OAC
				252:606.
(9)
Industrial
				wastes.
Discuss the characteristics and volume of anticipated industrial
				wastes.
(10)
Collection
				system.
Describe the area to be served by existing and proposed sewers.
				Sewer capacities must be designed for the estimated ultimate population that
				will be served. Similarly, consideration must be given to the maximum
				anticipated loadings from institutions, industrial parks and other similarly
				situated facilities.
(11)
Financing.
Provide itemized cost estimates to build, operate and
				maintain the proposed project including, but not limited to:
(A) development, construction, land and
				rights-of-way, legal services, engineering services, contingencies,
				refinancing, and any other factors associated with the proposed
				project;
(B) discuss financing
				methods;
(C) provide information
				regarding rate structures, annual operating and maintenance (O&M) cost,
				tabulation of users by monthly usage categories and revenue received for the
				last three fiscal years; and
(D)
				give status of existing debts and required reserve accounts. Include a schedule
				of short-lived assets and a recommended annual reserve deposit to fund
				replacement of short-lived assets such as pumps, paint and small
				equipment.
(12)
Enforcement orders.
Discuss all applicable enforcement orders,
				including the violations cited in the orders and how the project will eliminate
				said violations.
(13)
Conclusions and Recommendations.
Provide any additional findings
				and recommendations that must be considered in development of the project. This
				must include:
(A) recommendations for a
				specific course of action to be undertaken;
(B) any special studies to be
				developed;
(C) highlight the need
				for special coordination, include a recommended plan of action to expedite
				project development, etc.
(14)
Project Schedule.
The
				report must propose a schedule to:
(A) obtain
				funds to complete the proposed project;
(B) submit construction plans,
				specifications, and permit application(s);
(C) start construction;
(D) complete construction, and
(E) attain compliance with applicable OPDES
				discharge permits.