**Subpart II**

**— Industrial Wastewater Treatment** 

**§98.350 Definition of source category.**  (a) This source category

consists of anaerobic processes used to treat industrial wastewater and industrial wastewater treatment sludge at facilities that perform the operations listed in this paragraph. (1) Pulp and paper manufacturing. (2) Food processing. (3) Ethanol production. (4) Petroleum refining. (b) An anaerobic process is a procedure in whi ch organic matter in wastewater, wastewater treatment sludge, or other material is degraded b y micro

- organisms in the absence of ox ygen, resulting in the generation of CO 2 and CH 4 . This source category consists of the following: anaerobic reactors, anaerob ic lagoons, anaerobic sludge digesters, and biogas destruction devices (for example, burners, boilers, turbines, flares, or other devices). (1) An anaerobic reactor is an enclosed vessel used for anaerobic wastewater treatment ( e.g., upflow anaerobic sludg e blanket, fixed film). (2) Ananaerobic sludge digester is an enclosed vessel in which wastewater treatment sludge is degraded anaerobicall y. (3) Ananaerobic lagoon is a lined or unlined earthen basin used for wastewater treatment, in which ox ygen is absent throughout the depth of the basin, except for a shallow surface zone. Anaerobic lagoons are not equipped with surface aerators. Anaerobic lagoons are classified as deep (depth more than 2 meters) or shallow (depth less than 2 meters).(c) This source cat egory does not include municipal wastewater treatment plants or separate treatment of sanitary

wastewater at industrial sites. **§98.351 Reporting threshold.**  You must report GHG emissions under this subpart if your facility meets all of the conditions unde r paragraphs (a) or (b) of this section: (a) Petroleum refineries and pulp and paper manufacturing. (1) The facility

is subject to reporting under subpart Y of this part (Petroleum Refineries) or subpart AA of this part (Pulp and Paper Manufacturing). (2) The facility

meets the requirements of either §98.2(a)(1) or (2). (3) The facility

operates an anaerobic process to treat industrial wastewater and/or industrial wastewater treatment sludge. (b) Ethanol production and food processing facilities. (1) The fa cility

performs an ethanol production or food processing operation, as defined in §98.358 of this subpart. (2) The facility

meets the requirements of §98.2(a)(2). (3) The facility

operates an anaerobic process to treat industrial wastewater and/or industri al wastewater treatment sludge. **§98.352 GHGs to report.**  (a) You must report CH 4 generation, CH 4 emissions, and CH 4 recovered from treatment of industrial wastewater at each anaerobic lagoon and anaerobic reactor. (b) You must report CH 4 emissions and CH 4 recovered from each anaerobic sludge digester. (c) You must report CH 4 emissions and CH 4 destruction resulting from each biogas collection and biogas destruction device.(d) You must report under subpart C of this part (General Stationary Fuel Combustion Sources) the emissions of CO 2 , CH 4 , and N 2 O from each stationary combustion unit associated with the biogas destruction device, if present, b y following the requirements of subpart C of this part. **§98.353 Calculating GHG emissions.**  (a) For each anaerobic reactor and anaerobic lagoon, estimate the annual mass of CH 4 generated according to the applicable requirements in paragraphs (a)(1) through (a)(2) of this section. (1) If you measure the concentration of organic material entering the anaerobic reactors or anaerobic lagoon using methods for the determination of chemical ox ygen demand (COD), then estimate annual mass of CH 4 generated using Equation II

- 1 of this section.

Where: CH 4 Gn = Annual mass CH 4 generated from the nth anaerobic wastewater treatment process

(metric tons). n = Index for processes at the facility , used in Equation II

- 7. w = Index for weekl y measurement period. Flow w = Volume of wastewater sent to an anaerobic wastewater treatment process in week w

(m 3 /week), measured as specified in §98.354(d). COD w = Average weekl y concentration of chemical ox ygen demand of wastewater entering an anaerobic wastewater treatment process (for week w)(kg/m 3 ), measured as specified in §98.354(b) and (c). B 0 = Maximum CH 4 producing potential of wastewater (kg CH 4 /kg COD), use the value 0.25.MCF = CH 4 conversion factor, based on relevant values in Table II

- 1 of this subpart.

0.001 = Conversion factor from kg to metric tons. (2) If you measure the concentration of organic material entering an anaerobic reactor or anaerobic lagoon using methods for the determination of 5

- day biochemical oxygen demand (BOD 5 ), then estimate annual mass of CH 4 generated using Equation II

- 2 of this section.

Where: CH 4 Gn = Annual mass of CH 4 generated from the anaerobic wastewater treatment process

(metric tons). n = Index for processes at the facility , used in Equation II

- 7. w = Index for weekl y measurement period. Flow w = Volume of wastewater sent to an anaerobic waste water treatment process in week w(m 3 /week), measured as specified in §98.354(d). BOD 5,w = Average weekly concentration of 5

- day

biochemical oxygen demand of wastewater entering an anaerobic wastewater treatment process for week w(kg/m 3 ), measured as specif ied in §98.354(b) and (c). B 0 = Maximum CH 4 producing potential of wastewater (kg CH 4 /kg BOD 5 ), use the value 0.6. MCF = CH 4 conversion factor, based on relevant values in Table II

- 1 to this subpart. 0.001 = Conversion factor from kg to metric tons. (b) Fo r each anaerobic reactor and anaerobic lagoon from which biogas is not recovered, estimate annual CH 4 emissions using Equation II

- 3 of this section.

Where:CH 4 E n = Annual mass of CH 4 emissions from the wastewater treatment process n from which

biogas is not recovered (metric tons). CH 4 Gn = Annual mass of CH 4 generated from the wastewater treatment process n, as calculated in Equation II

- 1 or II
- 2 of this section (metric tons). (c) For each anaerobic sludge digester, anaerobic reactor, or anaerobic lagoon from which some biogas is recovered, estimate the annual mass of CH 4 recovered according to the requirements in paragraphs (c)(1) and (c)(2) of this section. To estimate the annual mass of CH 4 recovered, you must continuously monitor biogas flow rate and d etermine the volume of biogas each week and the cumulative volume of biogas each ye ar that is collected and routed to a destruction device as specified in §98.354(h). If the gas flow meter is not equipped with automatic correction for temperature, pressure , or, if necessary , moisture content, you must determine these parameters as specified in paragraph (c)(2)(ii) of this section. (1) If you continuously

monitor CH 4 concentration (and if necessary , temperature, pressure, and moisture content required as spe cified in §98.354(f)) of the biogas that is collected and routed to a destruction device using a monitoring meter specificall y for CH 4 gas, as specified in §98.354(g), you must use this monitoring system and calculate the quantity of CH 4 recovered for destruction using Equation II

- 4 of this section. A fully integrated s ys tem that directl y reports CH 4 quantity

requires only

the summing of results of all monitoring periods for a given year.

Where: R n = Annual quantity

of CH 4 recovered from the nth anaerobic reactor, sludge digester, or lagoon (metric tons CH 4 /y

r) n = Index for processes at the facility , used in Equation II

- 7.M = Total number of measurement periods in a ye ar. Use M = 365 (M = 366 for leap ye ars) for daily ave raging of continuous monitoring, as provided in paragraph (c)(1)of this section. Use M = 52 for weekl y sampling, as provided in paragraph (c)(2)of this section. m = Index for measurement period. Vm = Cumulative volumetric flow for the measurement period in actual cubic feet (acf). If no biogas was recovered during a monitoring period, use zero. (KMC ) m = Moisture correction term for the measurement period, volumetric basis. = 1 when (V) m and (C CH4 ) m are measured on a dry basis or if both are measured on a wet basis. = 1 −(f H2O ) m when (V) m is measured on a wet basis and (C CH4 ) m is measured on a dry basis. = 1/[1 −(f

H2O ) m ] when (V) m is measured on a dry basis and (C CH4 ) m is measured on a wet basis. (f H2O ) m = Average moisture content of biogas during the measurment period, volumetric basis, (cubic feet water per cubic feet biogas). (C CH4 ) m = Average CH 4 concentration of biogas during the measurement period, (volume %). 0.0423 = Density of CH 4 lb/cf at 520 ° R or 60 °F and 1 atm. 520 °R = 520 degrees Rankine. T m = Average temperature at which flow is measured for the measurement period (°R). If the

flow rate meter automatically corrects for temperature to 520° R, replace “520° R/T m ” with “1”.P m = Average pres sure at which flow is measured for the measurement period (atm). If the flow rate meter automaticall y corrects for pressure to 1 atm, replace “P m/1” with “1”. 0.454/1,000 = Conversion factor (metric ton/lb). (2) If you do not continuously monitor CH 4 conce ntration according to paragraph (c)(1) of this section, you must determine the CH 4 concentration, temperature, pressure, and, if necessary , moisture content of the biogas that is collected and routed to a destruction device according to the requirements in paragraphs (c)(2)(i) through (c)(2)(ii) of this section and calculate the quantity of CH 4 recovered for destruction using Equation II

- 4 of this section. (i) Determine the CH 4 concentration in the biogas that is collected and routed to a destruction device in a location near or representative of the location of the gas flow meter at least once each calendar week; if onl y one measurement is made each calendar week, there must be least three day s between measurements. For a given calendar week, you are not re quired to determine CH 4 concentration if the cumulative volume of biogas for that calendar week, determined as specified in paragraph (c) of this section, is zero. (ii) If the gas flow meter is not equipped with automatic correction for temperature, pressure, or, if necessary , moisture content: (A) Determine the temperature and pressure in the biogas that is collected and routed to a destruction device in a location near or representative of the location of the gas flow meter at least once each calendar wee k; if onl y one measurement is made each calendar week, there must be at least three day s between measurements. (B) If the CH 4 concentration is determined on a dry basis and biogas flow is determined on a wet basis, or CH 4 concentration is determined on a w et basis and biogas flow is determined on a dry basis, and the flow meter does not automatically correct for moisture content, determine themoisture content in the biogas that is collected and routed to a destruction device in a location

near or represent ative of the location of the gas flow meter at least once each calendar week that the cumulative biogas flow measured as specified in §98.354(h) is greater than zero; if only one measurement is made each calendar week, there must be at least three days between measurements. (d) For each anaerobic sludge digester, anaerobic reactor, or anaerobic lagoon from which some quantity

of biogas is recovered, you must estimate both the annual mass of CH 4 that is generated, but not recovered, according to paragraph (d)(1) of this section and the annual mass of CH 4 emitted according to paragraph (d)(2) of this section. (1) Estimate the annual mass of CH 4 that is generated, but not recovered, using Equation II

5 of this section.

Where: CH 4 Ln = Leakage at the anaerobic process n (metric tons CH 4 ). n = Index for processes at the facility , used in Equation II

- 7. R n = Annual quantity

of CH 4 recovered from the nth anaerobic reactor, anaerobic lagoon, or anaerobic sludge digester, as calculated in Equation II

- 4 of this section (metric tons CH 4 ). CE = CH 4 collection efficiency of anaerobic process n, as specified in Table II

- 2 of this subpart ( decimal). (2) For each anaerobic sludge digester, anaerobic reactor, or anaerobic lagoon from which some quantity

of biogas is recovered, estimate the annual mass of CH 4 emitted using Equation II

6 of this section.Where:

CH 4 E n = Annual quantity of CH 4 e mitted from the process n from which biogas is recovered (metric tons). n = Index for processes at the facility , used in Equation II

- 7. CH 4 Ln = Leakage at the anaerobic process n, as calculated in Equation II

- 5 of this section (metric tons CH 4 ). R n = Annual quantity

of CH 4 recovered from the nth anaerobic reactor or anaerobic sludge digester, as calculated in Equation II

- 4 of this section (metric tons CH 4 ). DE 1 = Primary

destruction device CH 4 destruction efficiency (lesser of manufacturer's specified destr uction efficiency

and 0.99). If the biogas is transported off

- site for destruction, use DE = 1. f Dest_1 = Fraction of hours the primary destruction device was operating calculated as the annual hours when the destruction device was operating divided by the annual operating hours of the biogas recovery

s ystem. I f the biogas is transported off

- site for destruction, use f Dest = 1. DE 2 = Back

- up destruction device CH 4 destruction efficiency (lesser of manufacturer's specified destruction efficiency

and 0.99). f Dest_2 = Fraction of hours the back

- up destruction device was operating calculated as the annual hours when the destruction device was operating divided by the annual operating hours of the biogas recovery

s ystem.(e) Estimate the total mass of CH 4 emitted from all anaerobic processes from which biogas

is not recovered (calculated in Eq. II

- 3) and all anaerobic processes from which some biogas is recovered (calculated in Equation II

- 6) using Equation II

- 7 of this section.

Where: CH 4 E T = Annual mass CH 4 em itted from all anaerobic processes at the facility (metric tons). n = Index for processes at the facility
. CH 4 E n = Annual mass of CH 4 emissions from process n (metric tons). j = Total number of processes from which methane is emitted. **§98.354 Monitoring**  **and QA/QC requirements.** (a) For calendar year 2011 monitoring, the facility may submit a request to the Administrator to use one or more best available monitoring methods as listed in §98.3(d)(1)(i) through (iv). The request must be submitted no later than October 12, 2010 and must contain the information in §98.3(d)(2)(ii). To obtain approval, the request must demonstrate to the Administrator's satisfaction that it is not reasonably feasible to acquire, install, and operate a required piece of monitoring e quipment by January 1, 2011. The use of best available monitoring methods will not be approved beyond December 31, 2011. (b) You must determine the concentration of organic material in wastewater treated anaerobicall y using anal ytical methods for COD or BOD 5 specified in 40 CFR 136.3 Table 1B. For the purpose of determining concentrations of wastewater influent to the anaerobic wastewater treatment process, samples may be diluted to the concentration range of the approved method, but the calculated concentration of the undiluted wastewater must be used for calculations and reporting required b y this subpart.(c) You must collect samples representing wastewater influent to the anaerobic wastewater

treatment process, following all preliminary and primary

tre atment steps ( e.g., after grit removal, primary clarification, oil

- water separation, dissolved air flotation, or similar solids and oil separation processes). You must collect and anal yze samples for COD or BOD 5 concentration at least once each calendar week that the anaerobic wastewater treatment process is operating; if only one measurement is made each calendar week, there must be at least three day s between measurements. You must collect a sample that represents the average COD or BOD 5 concentration of the waste stream over a 24

- hour sampling period. You must collect a minimum of four sample aliquots per 24

- hour period and composite the aliquots for analy sis. Collect a flow

- proportional composite sample (eithe r constant time interval between samples with sample volume proportional to stream flow, or constant sample volume with time interval between samples proportional to stream flow). Follow sampling procedures and techniques presented in Chapter 5, Sampling, of the “NPDES Compliance Inspection Manual,” (incorporated by reference, see §98.7) or Section 7.1.3, Sample Collection Methods, of the “U.S. EPA NPDES Permit Writers' Manual,” (incorporated b y reference, see §98.7). (d) You must measure the flowrate of wa stewater entering anaerobic wastewater treatment process at least once each calendar week that the process is operating; if only one measurement is made each calendar week, there must be at least three day s between measurements. You must measure the flowrate for the 24

- hour period for which you collect samples anal yz ed for COD or BOD 5 concentration. The flow measurement location must correspond to the location used to collect samples analyzed for COD or BOD 5 concentration. You must measure the flowrate usin g one of the methods specified in paragraphs (d)(1) through (d)(5) of this section or as specified b y the manufacturer.(1) ASME MFC

- 3M
- 2004 Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and

Venturi (incorporated b y reference, see §98.7). (2) A SME MFC
- 5M
- 1985 (Reaffirmed 1994) Measurement of Liquid Flow in Closed Conduits Using Transit

- Time Ultrasonic Flowmeters (incorporated b y reference, see §98.7). (3) ASME MFC

- 16
- 2007 Measurement of L iquid Flow in Closed Conduits with Electromagnetic Flowmet ers (incorporated b y reference, see §98.7). (4) ASTM D1941

- 91 (Reapproved 2007) Standard Test Method for Open Channel Flow Measurement of Water with the Parshall Flume, approved June 15, 2007, (incorporated b y reference, see §98.7). (5) ASTM D5614

- 94 (Reap proved 2008) Standard Test Method for Open Channel Flow Measurement of Water with Broad

- Crested Weirs, approved October 1, 2008, (incorporated by reference, see §98.7). (e) All wastewater flow measurement devices must be calibrated prior to the first year of reporting and recalibrated either bienniall y (every 2 years) or at the minimum frequency specified b y the manufacturer. Wastewater flow measurement devices must be calibrated using the procedures specified by the device manufacturer. (f) For each anaero bic process (such as anaerobic reactor, sludge digester, or lagoon) from which biogas is recovered, you must make the measurements or determinations specified in paragraphs (f)(1) through (f)(3) of this section. (1) You must continuously measure the biogas flow rate as specified in paragraph (h) of this section and determine the cumulative volume of biogas recovered. (2) You must determine the CH 4 concentration of the recovered biogas as specified in paragraph (g) of this section at a location near or repre sentative of the location of the gas flowmeter. You must determine CH 4 concentration either continuously or intermittently . If you determine the concentration intermittently, you must determine the concentration at least once each calendar week that the c umulative biogas flow measured as specified in paragraph (h) of this section is greater than zero, with at least three day s between measurements. (3) As specified in §98.353(c) and paragraph (h) of this section, you must determine temperature, pressure, an d moisture content as necessary to accuratel y determine the biogas flow rate and CH 4 concentration. You must determine temperature and pressure if the gas flow meter or gas composition monitor do not automatically correct for temperature or pressure. You must measure moisture content of the recovered biogas if the biogas flow rate is measured on a wet basis and the CH 4 concentration is measured on a dry basis. You must also measure the moisture content of the recovered biogas if the biogas flow rate is meas ured on a dry basis and the CH 4 concentration is measured on a wet basis. (g) For each anaerobic process (such as an anaerobic reactor, sludge digester, or lagoon) from which biogas is recovered, operate, maintain, and calibrate a gas composition monitor
c apable of measuring the concentration of CH 4 in the recovered biogas using one of the methods specified in paragraphs (g)(1) through (g)(6) of this section or as specified by the manufacturer. (1) Method 18 at 40 CFR part 60, appendix A

- 6. (2) ASTM D1945

- 0 3, Standard Test Method for Analy sis of Natural Gas by Gas Chromatograph y (incorporated b y reference, see §98.7). (3) ASTM D1946

- 90 (Reapproved 2006), Standard Practice for Anal ys is of Reformed Gas by Gas Chromatograph y (incorporated b y reference, see §98. 7). (4) GPA Standard 2261

- 00, Analy sis for Natural Gas and Similar Gaseous Mixtures by Gas Chromatograph y (incorporated b y reference, see §98.7).(5) ASTM UOP539

- 97 Refinery Gas Anal ys is by

Gas Chromatograph y (incorporated b y reference, see §98.7). (6) As an alternative to the gas chromatography methods provided in paragraphs (g)(1) through (g)(5) of this section, you may use total gaseous organic concentration analyzers and calculate the CH 4 concentration following the requirements in paragraphs (g)(6)(i) through (g)(6)(iii) of this section. (i) Use Method 25A or 25B at 40 CFR part 60, appendix A

- 7 to determine total gaseous organic concentration. You must calibrate the instrument with CH 4 and determine the total gaseous organic concentration as carbon (or as CH 4 ; K=1 in Equation 25A

- 1 of Method 25A at 40 CFR part 60, appendix A

- 7). (ii) Determine a non

- methane organic carbon correction factor at the routine sampling location no less frequently than once a reporting year following the requirements in paragra phs (g)(6)(ii)(A) through (g)(6)(ii)(C) of this section. (A) Take a minimum of three grab samples of the biogas with a minimum of 20 minutes between samples and determine the methane composition of the biogas using one of the methods specified in paragraph s (g)(1) through (g)(5) of this section. (B) As soon as practical after each grab sample is collected and prior to the collection of a subsequent grab sample, determine the total gaseous organic concentration of the biogas using either Method 25A or 25B at 40 CFR part 60, appendix A

- 7 as specified in paragraph (g)(6)(i) of this section. (C) Determine the arithmetic average methane concentration and the arithmetic average total gaseous organic concentration of the samples anal yz ed according to paragraphs (g) (6)(ii)(A) and (g)(6)(ii)(B) of this section, respectively , and calculate the non

- methane organiccarbon correction factor as the ratio of the average methane concentration to the average total

gaseous organic concentration. If the ratio exceeds 1, use 1 f or the non

- methane organic carbon correction factor. (iii) Calculate the CH 4 concentration as specified in Equation II

- 8 of this section.

Where: C CH4 = Methane (CH 4 ) concentration in the biogas (volume %) for use in Equation II

- 4 of this

subpart. f NMOC = Non
- methane organic carbon correction factor from the most recent determination of the
non - methane organic carbon correction factor as specified in paragraph (g)(6)(ii) of this section (unitless). C TGOC = Total gaseous organic carbon concentration measured using Method 25A or 25B at 40 CFR part 60, appendix A

- 7 during routine monitoring of the biogas (volume %). (h) For each anaerobic process (such as an anaerobic reactor, sludge digester, or lagoon) from which biogas is recovered, install, operate, maintain, and calibrate a gas flow meter capable of continuously

measuring the volumetric flow rate of the recovered biogas using one of the methods specified in paragraphs (h)(1) through (h)(8) of this section or as specified b y the manufacturer. Recalibrate each gas flow meter either bienniall y (every 2 years) or at the minimum frequency

specified by

the manufacturer. Except as provided in §98.353(c)(2)(iii), each gas flow meter must be capable of correcting for the temperature and pressure and, if necessary , moisture content. (1) ASME MFC

- 3M
- 2004, Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi (incorporated b y reference, see §98.7).(2) ASME MFC

- 4M
- 1986 (Reaffirmed 1997), Measurement of Gas Flow by Turbine Meters (incorporated b y refere nce, see §98.7). (3) ASME MFC

- 6M
- 1998, Measurement of Fluid Flow in Pipes Using Vortex Flowmeters (incorporated b y reference, see §98.7). (4) ASME MFC

- 7M
- 1987 (Reaffirmed 1992), Measurement of Gas Flow by Means of Critical Flow Venturi Nozzles (incorporate d by reference, see §98.7). (5) ASME MFC

- 11M
- 2006 Measurement of Fluid Flow by Means of Coriolis Mass Flowmeters (incorporated by reference, see §98.7). The mass flow must be corrected to volumetric flow based on the measured temperature, pressure, and bio gas composition. (6) ASME MFC

- 14M
- 2003 Measurement of Fluid Flow Using Small Bore Precision Orifice Meters (incorporated b y reference, see §98.7). (7) ASME MFC

- 18M
- 2001 Measurement of Fluid Flow using Variable Area Meters (incorporated b y reference, see §9 8.7). (8) Method 2A or 2D at 40 CFR part 60, appendix A

- 1. (i) All temperature, pressure, and, moisture content monitors required as specified in paragraph (f) of this section must be calibrated using the procedures and frequencies where specified b y the d evice manufacturer, if not specified use an industry accepted or industry standard practice. (j) All equipment (temperature, pressure, and moisture content monitors and gas flow meters and gas composition monitors) must be maintained as specified b y the manufacturer. (k) If applicable, the owner or operator must document the procedures used to ensure the accuracy of measurements of COD or BOD 5 concentration, wastewater flow rate, biogas flow rate, biogas composition, temperature, pressure, and moisture cont ent. These procedures include,but are not limited to, calibration of gas flow meters, and other measurement devices. The

estimated accuracy

of measurements made with these devices must also be recorded, and the technical basis for these estimates must be documented. **§98.355 Procedures for estimating missing data.**  A complete record of all measured parameters used in the GHG emissions calculations is required. Therefore, whenever a quality

- assured value of a required parameter is unavailable ( e.g., if a meter malfunctions during unit operation or if a required sample is not taken), a substitute data value for the missing parameter must be used in the calculations, according to the following requirements in paragraphs (a) through (c) of this section: (a) For each missing weekly value of COD or BOD 5 or wastewater flow entering an anaerobic wastewater treatment process, the substitute data value must be the arithmetic average of the quality

- assured values of those parameters for the week immediately pre ceding and the week immediatel y following the missing data incident. (b) For each missing value of the CH 4 content or biogas flow rates, the substitute data value must be the arithmetic average of the quality- assured values of that parameter immediatel y preceding and immediately following the missing data incident. (c) If, for a particular parameter, no quality- assured data are available prior to the missing data incident, the substitute data value must be the first quality

- assured value obtained after the missing data period. If, for a particular parameter, the “after” value is not obtained by the end of the reporting ye ar, you may use the last quality- assured value obtained “before” the missing data period for the missing data substitution. You must docume nt and keep records of the procedures yo u use for all such estimates. **§98.356 Data reporting requirements.** In addition to the information required b y §98.3(c), each annual report must contain the

following information for each wastewater treatment sy stem. (a) Id entify

the anaerobic processes used in the industrial wastewater treatment sy stem to treat industrial wastewater and industrial wastewater treatment sludge, provide a unique identifier for each anaerobic process, indicate the average depth in meters of each anaerobic lagoon, and indicate whether biogas generated b y each anaerobic process is recovered. Provide a description or diagram of the industrial wastewater treatment s ys tem, identifying the processes used , i ndicat ing how the processes are related to each other , and p roviding a unique identifier for each anaerobic process
. Each anaerobic processes must be identified as one of the following : (1) Anaerobic reactor. (2) Anaerobic deep lagoon (depth more than 2 meters). (3) Anaerobic sh allow lagoon (depth less than 2 meters). (4) Anaerobic sludge digester. (b) For each anaerobic wastewater treatment process (reactor, deep lagoon, or shallow lagoon) yo u must report: (1) Weekl y average COD or BOD 5 concentration of wastewater entering each anaerobic wastewater treatment process, for each week the anaerobic process was operated. (2) Volume of wastewater entering each anaerobic wastewater treatment process for each week the anaerobic process was operated. (3) Maximum CH 4 production potential ( B 0 ) used as an input to Equation II

- 1 or II
- 2 of this subpart, from Table II
- 1 to this subpart. (4) Methane conversion factor (MCF) used as an input to Equation II

- 1 or II
- 2 of this subpart, from Table II
- 1 to this subpart.(5) Annual mass of CH 4 generated by each anaerobic wastewater treatment process, calculated using Equation II

- 1 or II
- 2 of this subpart. (6) If the facility performs an ethanol production processing operation as defined in §98.358 of this subpart, you must indicate if the facility uses a wet milling process or a dry milling process. (c) For each anaerobic wastewater treatment process from which biogas is not recovered, yo u must report the annual CH 4 emissions, calculated using Equation II

- 3 of this subpart. (d) For each anaerobic wastewat er treatment process and anaerobic sludge digester from which some biogas is recovered, you must report: (1) Annual quantity of CH 4 recovered from the anaerobic process calculated using Equation II
- 4 of this subpart. (2) Total weekly

volumetric biogas flow for each week (up to 52 weeks/ye ar) that biogas is collected for destruction. (3) Weekl y average CH 4 concentration for each week that biogas is collected for destruction. (4) Weekl y average biogas temperature for each week at which flow is measured for bi ogas collected for destruction, or statement that temperature is incorporated into monitoring equipment internal calculations. (5) Whether flow was measured on a wet or dry basis, whether CH 4 concentration was measured on a wet or dry basis, and if require d for Equation II

- 4 of this subpart, weekl y average moisture content for each week at which flow is measured for biogas collected for destruction, or statement that moisture content is incorporated into monitoring equipment internal calculations.(6) Weekl y average biogas pressure for each week at which flow is measured for biogas

collected for destruction, or statement that pressure is incorporated into monitoring equipment internal calculations. (7) CH 4 collection efficiency (CE) used in Equation II

- 5 of this subpart. (8) Whether destruction occurs at the facility or off

- site. If destruction occurs at the facility , also report whether a back

- up destruction device is present at the facility , the annual operating hours for the primary

destruction device, the annual operating hours for the back

- up destruction device (if present), the destruction efficiency for the primary

destruction device, and the destruction efficiency

for the back

- up destruction device (if present). (9) For each anaerobic process from whic h some biogas is recovered, you must report the annual CH 4 emissions, as calculated b y Equation II

- 6 of this subpart. (e) The total mass of CH 4 emitted from all anaerobic processes from which biogas is not recovered (calculated in Equation II

- 3 of this sub part) and from all anaerobic processes from which some biogas is recovered (calculated in Equation II

- 6 of this subpart) using Equation II

- 7 of this subpart. **§98.357 Records that must be retained.**  In addition to the information required b y §98.3(g), you must retain the calibration records for all monitoring equipment, including the method or manufacturer's specification used for calibration. **§98.358 Definitions.**  Except as provided below, all terms used in this subpart have the same meaning given in the CAA and subpart A of this part.Biogas means the combination of CO 2 , CH 4 , and other gases produced b y the biological

breakdown of organic matter in the absence of oxygen. Dry milling means the process in which shelled corn is milled by dry process, without an initial steeping step. Ethanol production means an operation that produces ethanol from the fermentation of sugar, starch, grain, or cellulosic biomass feedstocks, or the production of ethanol sy ntheticall y from petrochemical feedstocks, such as ethyl e ne or other chemicals. Food processing means an operation used to manufacture or process meat, poultry , fruits, and/or vegetables as defined under NAICS 3116 (Meat Product Manufacturing) or NAICS 3114 (Fruit and Vegetable Preserving and Specialty Food Manu facturing). For information on NAICS codes, see http://www.census.gov/eos/www/naics/. Industrial wastewater means water containing wastes from an industrial process. Industrial wastewater includes water which comes into direct contact with or results from the storage, production, or use of any raw material, intermediate product, finished product, by

- product, or waste product. Examples of industrial wastewater include, but are not limited to, paper mill white water, wastewater from equipment cleaning, wastew ater from air pollution control devices, rinse water, contaminated stormwater, and contaminated cooling water. Industrial wastewater treatment sludge means solid or semi

- solid material resulting from the treatment of industrial wastewater, including but no t limited to biosolids, screenings, grit, scum, and settled solids. Wastewater treatment system means the collection of all processes that treat or remove pollutants and contaminants, such as soluble organic matter, suspended solids, pathogenic organisms, and chemicals from wastewater prior to its reuse or discharge from the facility
.Wet milling means the process in which shelled corn is steeped in a dilute solution of

sulfurous acid (sulfur dioxide dissolved in water) prior to further processing. Weekly average means the sum of all values measured in a calendar week divided by the number of measurements.
**Table II -**  **1 to Subpart II of Part 98**

**— Em**  **ission Factors Factors**  **Default value Units**  B 0— for facilities monitoring COD 0.25 Kg CH 4 /kg COD B 0— for facilities monitoring BOD 5 0.60 Kg CH 4 /kg BOD 5 MCF

—anaerobic reactor 0.8 Fraction. MCF

—anaerobic deep lagoon (depth more than 2 m) 0.8 Fraction. MCF

—anaerobic shallow lagoon (depth less than 2 m) 0.2 Fraction. **Table II -**  **2 to Subpart II**

**— Collection Efficiencies of**  **Anaerobic Processes Anaerobic process type**  **Cover type Methane collection**  **efficiency** Covered anaerobic lagoon (biogas capture) Bank to bank, impermeable 0.975 Modular, impermeable 0.70 Anaerobic sludge digester; anaerobic reactor Enclosed Vessel 0.99