N.H. Code Admin. R. Env-Wq 707.03

Current through Register No. 25, June 20, 2024

Section Env-Wq 707.03 - Basis of Design Report: Existing Facilities

For existing facilities, the basis of design report shall include a description or analysis of:

(a) Existing facilities, including:

(1) Condition of existing facilities, including:

a.Adequacy of current facilities;

b.Suitability for continued use;

c.Conveyance, treatment, storage and disposal capabilities;

d.Existing capacity of each component;

e.Analysis of overall current energy consumption; and

f.Reference an asset management program, if applicable;

(2) Location maps of existing facilities;

(3) Schematic process layout of all existing facilities;

(4) Summary of recurring compliance issues; and

(5) History of major system components, including:

a.Operational history;

b.Renovations; and

c.Expansions;

(b) Current financial status of existing facilities, including:

(1) Current rate schedules;

(2) Annual operation and maintenance costs with a breakout of current energy costs;

(3) Other capital improvement programs;

(4) Tabulation of users by monthly usage categories for the most recent fiscal year; and

(5) Status of existing debts and required reserve accounts;

(c) Water, energy, or waste audits and outcomes thereof, if applicable;

(d) Existing and projected flow;

(e) Flow composition, waste strength and peaking factors based on historical records, if records exist;

(f) If no records exist, domestic waste strength and peaking factors based on:

(1) An average daily per capita contribution of 0.20 pounds of TSS and 0.17 pounds of BOD₅, if garbage grinders are not prevalent in the area;

(2) An average daily per capita contribution of 0.25 pounds of TSS and 0.22 pounds of BOD₅, if garbage grinders are prevalent in the area;

(3) An average daily per capita contribution of 0.04 pounds of total nitrogen;

(4) An average daily per capita contribution of 0.006 pounds of total phosphorous; and

(5) Not less than 70 gallons of flow per capita per day nor more than 100 gallons of flow per capita per day;

(g) For process-related upgrades to existing WWTPs, or where sampling of the future influent wastewater stream is possible, the sampling results for the following influent wastewater parameters from plant records for the previous 2 years or, if such data is not available, from sampling designed by the engineer to produce representative results:

(1) Biochemical Oxygen Demand (BOD₅);

(2) Total Suspended Solids (TSS);

(3) pH;

(4) Temperature;

(5) Total Kjeldahl Nitrogen (TKN);

(6) Alkalinity;

(7) Chemical Oxygen Demand (COD), as applicable; and

(8) Total Phosphorous, as applicable;

(h) Industrial wastes, if present, quantified and characterized as follows:

(1) Use an industry-by-industry chemical analysis from existing pretreatment programs including conventional pollutants (BOD₅ and TSS), nutrients, pH, and non-conventional parameters potentially present in the waste stream; or

(2) In the absence of existing pretreatment programs, full waste characterization shall be performed; and

(i) Septage receiving and treatment capacity, based on:

(1) The septage volume and characterization expected to be received during the planning period of the WWTP;

(2) Septage strength of 6,500 mg/L BOD₅, 12,900 mg/L TSS, 590 mg/L total Kjeldahl nitrogen (TKN), and 210 mg/L total phosphorous, if specific data is not available; and

(3) Appropriate peaking factors to account for seasonal variations in septage quantities from the specific service area.

N.H. Code Admin. R. Env-Wq 707.03

(See Revision Note at chapter heading for Env-Wq 700) #8590, eff 3-25-06

Amended byVolume XXXIV Number 46, Filed November 13, 2014, Proposed by #10693, Effective 10/15/2014, Expires10/15/2024.