Page 1 of 28
**Subpart II —**  **Industrial Wastewater Treatment**
(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. § 98.350 Definition of source category.

(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 by micro

- organisms in the absence of oxygen, resulting in the generation of CO 2 and CH 4

(1) An . 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). anaerobic reactor is an enclosed vessel used for anaerobic wastewater treatment ( e.g.

(2) An , upflow anaerobic sludg e blanket, fixed film). anaerobic sludge digester is an enclosed vessel in which wastewater treatment sludge is degraded anaerobically.Page 2 of 28
(3) An anaerobic lagoon

(c) This source c ategory does not include municipal wastewater treatment plants or separate treatment of sanitary wastewater at industrial sites. is a lined or unlined earthen basin used for wastewater treatment, in which oxygen is abs ent 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).

You must report GHG emissions under this subpart if your facility meets all of the conditions und er paragraphs (a) or (b) of this section: § 98.351 Reporting threshold.

(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
.Page 3 of 28 (1) The facility 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 indus trial wastewater treatment sludge.

(a) You must report CH § 98.352 GHGs to report.

4 generation, CH 4 emissions, and CH 4

(b) You must report CH recovered from treatment of industrial wastewater at each anaerobic lagoon and anaerobic reactor.

4 emissions and CH 4

(c) You must report CH recovered from each anaerobic sludge digester.

4 emissions and CH 4

(d) You must report under subpart C of this part (General Stationary Fuel Combusti on Sources) the emissions of CO destruction resulting from each biogas collection and biogas destruction device.

2 , CH 4 , and N 2 O from each stationary combustion unit associated with the biogas destruction device, if present, by following the requirements of subpart C of this part.

(a) For each anaerob ic reactor and anaerobic lagoon, estimate the annual mass of CH § 98.353 Calculating GHG emissions.

4 generated according to thePage 4 of 28 applicable requirements in paragraphs (a)(1) through (a)(2) of this section. (1) If you measure the concentration of organic material entering the anaerobic reactor s or anaerobic lagoon using methods for the determination of chemical oxygen demand (COD), then estimate annual mass of CH 4

(Eq. II

- 1) generated using Equation II

– 1 of this section.

Where:
CH 4 G n = Annual mass CH 4

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

– 7. generated from the nth anaerobic wastewater treatment process (metric tons).

w = Index for weekly measurement period. Flow w = Volume of wastewater sent to an anaerobic wastewater treatment process in week w (m 3

COD /week), measur ed as specified in §98.354(d).

w = Average weekly concentration of chemical oxygen demand of wastewater entering an anaerobic wastewater treatment process (for week w)(kg/m 3

B ), measured as specified in §98.354(b) and (c).
0 = Maximum CH 4 producing pote ntial of wastewater (kg CH 4 MCF = CH /kg COD), use the value 0.25.

4 0.001 = Conversion factor from kg to metric tons. conversion factor, based on relevant values in Table II

– 1 of this subpart.
(2) If you measure the concentration of organic material enterin g an anaerobic reactor or anaerobic lagoon using methodsPage 5 of 28
for the determination of 5

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

(Eq. II

- 2) generated using Equation II

– 2 of this section.

Where:
CH 4 G n = Annual mass of CH 4 `

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

– 7. genera ted from the anaerobic wastewater treatment process (metric tons).

w = Index for weekly measurement period. Flow w = Volume of wastewater sent to an anaerobic wastewater treatment process in we ek w(m 3

BOD /week), measured as specified in §98.354(d).
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

B ), measured as specified in §98.354(b) and (c).

0 = Maximum CH 4 producing potential of wastewater (kg CH 4 /kg BOD 5 MCF = CH ), use the value 0.6.

4 0.001 = Conversion factor from kg to metric tons. conversion factor, based on relevant values in Table II

– 1 to this subpart.

(b) For each anaerobic reactor and anaerobic lagoon from which biogas is not recovered, estimate annual CH 4

(Eq. II

- 3)2 emissions using Equation II

– 3 of this section.

Where:Page 6 of 28
CH 4 E n = Annual mass of CH 4

CH emissions from the wastewater treatment process n from which biogas is not recovere d (metric tons).

4 G n = Annual mass of CH 4

(c) For each anaerobic sludge digester, anaerobic reactor, or anaerobic lagoon from which s ome biogas is recovered, estimate the annual mass of CH generated from the wastewater treatment process n, as calculated in Equation II

– 1 or II

– 2 of this section (metric tons).

4 recovered according to the requirements in paragraphs (c)(1) and (c)(2) of this section. To estimate the annual mass of CH 4

(1) If you continuously monitor CH recovered, you must continuously monitor biogas flow rate and determine the volume of biogas each week and the cumulative volume of biogas each year 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 nec essary, moisture content, you must determine these parameters as specified in paragraph (c)(2)(ii) of this section.

4 concentration (and if necessary, temperature, pressure, and moisture content required as specified in §9 8.354(f)) of the biogas that is collected and routed to a destruction device using a monitoring meter specifically 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 usin g Equation II

– 4 of this section. A fully integrated system that directly reports CH 4 quantityPage 7 of 28 requires only the summing of results of all monitoring periods for a given year.

(Eq. II

- 4) Where:

R n = Annual quantity of CH 4 recovered from the nth anaerobic reactor, sludge digester, or lagoon (metric tons CH 4 n = Index for processes at the facility, used in Equation II

– 7. /yr)

M = Total number of measurement periods in a year. Use M = 365 (M = 366 for leap years) for daily averaging of continuous monitoring, as provided in paragraph (c)(1)of this section. Use M = 52 for weekly sampling, as provided in paragraph (c)(2)of this section.
m = Index for measurement period. V m

(K = Cumulative volumetric flow for the measurement period in actual cubic feet (acf). If no b iogas was recovered during a monitoring period, use zero.

MC ) m

= 1 when (V) = Moisture correction term for the measurement period, volumetric basis.

m and (C CH4 ) m

= 1 −(f are measured on a dry basis or if both are measured on a wet basis.
H2O ) m when (V) m is measured on a wet basis and (C CH4 ) m

= 1/[1 −(f is measured on a dry basis.
H2O ) m ] when (V) m is measured on a dry basis and (C CH4 ) m (f is measured on a wet basis.
H2O ) m
(C = Average moisture content of biogas during the measurment p eriod, volumetric basis , (cubic feet water per cubic feet biogas).
CH4 ) m = Average CH 4 concentration of biogas during the measurement period, (volume %).Page 8 of 28
0.0423 = Density of CH 4 520 °R = 520 degrees Rankine. lb/cf at 520 °R or 60 °F and 1 atm.

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
P ” with “1”.

m = Average pressure at which flow is measured for the measurement period (atm). If the flow rate mete r automatically corrects for pressure to 1 atm, replace “P m 0.454/1,000 = Conversion factor (metric ton/lb). /1” with “1”.

(2) If you do not continuously monitor CH 4 concentration according to paragraph (c)(1) of this section, you must determine the CH 4 co ncentration, 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 o f CH 4

(i) Determine the CH recovered for destruction using Equation II

– 4 of this section.

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 only one measurement is made each calendar week, there must be least three days between measurements. For a given calendar week, you are not required to determine CH 4 concentration if the cumulative volume of biogasPage 9 of 28
for that cal endar 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 week; if only one measurement is made each calendar week, there must be at least three d ays 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 wet basis and biogas flow is determined on a dry basis, and the flow meter does not

au tomatically correct for moisture content, determine the moisture content 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 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.Page 10 of 28 (d) For each anaerobic sludge digester, anaerobic reactor,

or anae robic 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

(1) Estimate the annual mass of CH emitted according to paragraph (d)(2) of this section.

4

(Eq. II

- 5) that is generated, but not recovered, using Equation II

– 5 of this section.

Where:
CH 4 L n = Leakage at the anaerobic process n (metric tons CH 4 n = Index for processes at the facility, use d 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

(Eq. II

- 6) emitted using Equation
II
– 6 of this se ction.Page 11 of 28
Where:
CH 4 E n = Annual quantity of CH 4

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

– 7. emitted from the process n from which biogas is recovered (metric tons).

CH 4 L n = 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

f dest ruction efficiency (lesser of manufacturer's specified destruction efficiency and 0.99). If the biogas is transported off

- site for destruction, use DE = 1.
Dest_1 = Fraction of hours the primary destruction device was operating ( calculated as the annual hours when the destruction device was operating hours/ divided by the annual operating hours in of the year). biogas recovery system . If the biogas is transported off

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

2 = Back

- up destruction device CH 4

f destruction efficiency (lesser of manufacturer's specified destruction efficiency and 0.99).
Dest_2 = Fraction of hours the back

- up destruction device was operating ( calculated as the annual hours when the destruction device was operating hours / divided by the annual operating hours in of the year). biogas recovery system . (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 whichPage 12 of 28
some b iogas is recovered (calculated in Equation II

– 6) using Equation II

– 7 of this section.

(Eq. II

- 7) Where:
CH 4 E T = Annual mass CH 4

n = Index for processes at the facility. emitted from all anaerobic processes at the facility (metric tons).

CH 4 E n = Annual m ass of CH 4 j = Total number of processes from which methane is emitted. emissions from process n (metric tons).

(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 t o the Administrator's satisfaction that it is not reasonably feasible to acquire, install, and operate a required piece of monitoring equipment by January 1, 2011. The use of best available monitoring methods will not be approved beyond December 31, 2011. § 98.354 Monitoring and QA/QC requirements.Page 13 of 28 (b) You must determine the concentration of organic material in wastewater treated anaerobically using analytical methods for COD or BOD 5

(c) You must coll ect samples representing wastewater influent to the anaerobic wastewater treatment process, following all preliminary and primary treatment steps ( e.g., after grit removal, primary clarification, oil

- water separation, dissolved air flotation, or similar s olids and oil separation processes). You must collect and analyze samples for COD or BOD specified in 40 CFR 136.3 Table 1B. For the purpose of determining concentrations of wastewater influent to the anaero bic 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 by this subpart.

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 days 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 analysis. Collect a flow

- proportional composite sample (either constant time interval between samples with sample volume proportional to stream flow, or constant samplePage 14 of 28 volume with time interval between samples proportional to s tream 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 by reference, see §98.7). (d) You must measure the flowrate of wastewater 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 days between measurements. You must measure the flowrate for the 24

- hour period for which you collect samples analyzed for COD or BOD 5 concentration. The flow measurement location must correspond to the location used to c ollect samples analyzed for COD or BOD 5

(1) ASME MFC

– 3M

– 2004 Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi (incorporated by reference,

see §98.7). concentration. You must measure the flowrate using one of the methods specified in paragraphs (d)(1) through (d)(5) of this section or as specified by the manufacturer.

(2) ASME MFC

– 5M

– 1985 (Reaffirmed 1994) Measurement of Liquid Flow in Closed Conduits Using Transit

- Time Ultrasonic Flowmeters (incorporated by reference, see §98.7).Page 15 of 28
(3) AS ME MFC

– 16

– 2007 Measurement of Liquid Flow in Closed Conduits with Electromagnetic Flowmeters (incorporated by 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 by reference, see §98.7). (5) ASTM D5614

– 94 (Reapproved 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 biennially (every 2 years) or at the minimum frequency specified by the manufacturer. Wastewater flow measurement devices must be calibrated using the procedures specified by the device manufacturer. (f) For each anaerobic process (such as anaerobic reactor, sludge digester, or lagoon) from which biogas is recovered, you must make the measurements or determinations specified in
parag raphs (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.Page 16 of 28 (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 representative of the location of the gas flow meter. You must determine CH 4

(3) As specified in §98.353(c) and paragraph (h) of this section, you must determine temperature, pressure, and moisture content as necessary to accurately determine the biogas flow rate and CH concentration either continuously or intermittently. If you determine the concentration interm ittently, you must determine the concentration at least once each calendar week that the cumulative biogas flow measured as specified in paragraph (h) of this section is greater than zero, with at least three days between measurements.

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 measured on a dry basis and the CH 4
(g) For each anaerobic process (such as an anaerobic reactor, sludge digester, or lagoon) fr om which biogas is concentration is measured on a wet basis.Page 17 of 28 recovered, operate, maintain, and calibrate a gas composition monitor capable of measuring the concentration of CH 4

(1) Method 18 at 40 CFR part 60, appendix A

– 6. in the recovered biogas using one of the methods specified in paragraphs (g)(1) through (g)(6) of this section or as spec ified by the manufacturer.

(2) ASTM D1945

– 03, Standard Test Method for Analysis of Natural Gas by Gas Chromatography (incorporated by reference,

see §98.7). (3) ASTM D1946

– 90 (Reapproved 2006), Standard Practi ce for Analysis of Reformed Gas by Gas Chromatography (incorporated by reference, see §98.7). (4) GPA Standard 2261

– 00, Analysis for Natural Gas and Similar Gaseous Mixtures by Gas Chromatography (incorporated by reference, see §98.7). (5) ASTM UOP539

– 97 R efinery Gas Analysis by Gas Chromatography (incorporated by 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 analyze rs and calculate the CH 4
(i) Use Method 25A or 25B at 40 CFR part 60, appendix A

– 7 to determine total gaseous organic concentration. You must concentration following the requirements in paragraphs (g)(6)(i) through (g)(6)(iii) of this section.Page 18 of 28
calibrate th e instrument with CH 4 and determine the total gaseous organic concentration as carbon (or as CH 4

(ii) Determine a non

- methane organic carbon correction factor at the routine sampling lo cation no less frequently than once a reporting year following the requirements in paragraphs (g)(6)(ii)(A) through (g)(6)(ii)(C) of this section. ; K=1 in Equation 25A

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

– 7).

(A) Take a minimum of three grab samples of the biogas with a minimum of 20 minutes between samples and deter mine the methane composition of the biogas using one of the methods specified in paragraphs (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, determi ne 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 avera ge total gaseous organic concentration of the samples analyzed according to paragraphs (g)(6)(ii)(A) and (g)(6)(ii)(B) of this section, respectively, and calculate the non

- methane organic carbon correction factor as the ratio of the average methane concent ration to the average total gaseousPage 19 of 28 organic concentration. If the ratio exceeds 1, use 1 for the

non - methane organic carbon correction factor. (iii) Calculate the CH 4

(Eq. II

- 8) concentration as specified in Equation II

– 8 of this section.

Where:
C CH 4 = Methane (CH 4

f ) concentration in the biogas (volume %) for use in Equation II

– 4 of this subpart.

NMOC

C = Non
- methane organic carbon correction factor from the most recent determination of the non

methane organic carbon correction factor as specified in parag raph (g)(6)(ii) of this section (unitless).

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 by the manufacturer. Recalibrate each gas flow meter either biennially (every 2 years) or at the minimum frequency specified by the manufacturer. Except as provided in §98.353(c)(2)(iii),Page 20 of 28 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 by reference,

see §98.7). (2) ASME MFC

– 4M

– 1986 (Reaffirmed 1997), Measurement of Gas Flow by Turbine Meters (incorporated by reference, see §98.7). (3) ASME MFC

– 6M

– 1998, Measurement of Fluid Flow in Pipes Using Vortex Flowmeters (incorporated by reference, see §98.7). (4) ASME MFC

– 7M

– 1 987 (Reaffirmed 1992), Measurement of Gas Flow by Means of Critical Flow Venturi Nozzles (incorporated by reference, see (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 biogas composition. §98.7).

(6) ASME MFC

– 14M

– 2003 Measurement of Fluid Flow Using Small Bore Precision Orifice Meters (incorporated by reference, see §98.7). (7) AS ME MFC

– 18M

– 2001 Measurement of Fluid Flow using Variable Area Meters (incorporated by reference, see (8) Method 2A or 2D at 40 CFR part 60, appendix A

– 1. §98.7).

(i) All temperature, pressure, and, moisture content monitors required as specified in paragra ph (f) of this sectionPage 21 of 28 must be calibrated using the procedures and frequencies where specified by the device manufacturer, if not specified use an industry accepted or industry standard practice. (j) All equipment (temperature, pressure, and moisture conte nt monitors and gas flow meters and gas composition monitors) must be maintained as specified by 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 concentratio n, wastewater flow rate, biogas flow rate, biogas composition, temperature, pressure, and moisture content. These procedures include, but are not limited to, calibration of gas flow meters, and other measurement devices. The estimated accuracy of measureme nts made with these devices must also be recorded, and the technical basis for these estimates must be documented.

A complete record of all measured parameters used in the GHG emissions calculations is requi red. Therefore, whenever a quality

- assured value of a required parameter is unavailable ( § 98.355 Procedures for estimating missing data.

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 calcul ations, according to the following requirements in paragraphs (a) through (c) of this section:Page 22 of 28 (a) For each missing weekly value of COD or BOD 5

(b) For each missing value of the CH or wastewater flow entering an anaerobic wastewater treatment process, the substitute data value must be the ari thmetic average of the quality

- assured values of those parameters for the week immediately preceding and the week immediately following the missing data incident.

4

(c) If, for a particular parameter, no quality

- assured data are available prior to the missing data i ncident, 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 year, you may use the last quality

- assured valu e obtained “before” the missing data period for the missing data substitution. You must document and keep records of the procedures you use for all such estimates. content or biogas flow rates, the substitute data value must be the arithmetic average of the quality

- assured values of that parameter immediately preceding and immediately following the missing data incident.

In addition to the information required by §98.3(c), e ach annual report must contain the following information for each wastewater treatment system. § 98.356 Data reporting requirements.Page 23 of 28 (a) A description or diagram of the industrial wastewater treatment system, identifying the processes used to treat industrial wastewater and industrial wastewat er treatment sludge. Indicate how the processes are related to each other and identify the anaerobic processes. Provide a unique identifier for each anaerobic process, indicate the average depth in meters of each anaerobic lagoon, and indicate whether biog as generated by each anaerobic process is recovered. The anaerobic processes must be identified as: (1) Anaerobic reactor. (2) Anaerobic deep lagoon (depth more than 2 meters). (3) Anaerobic shallow lagoon (depth less than 2 meters). (4) Anaerobic sludge d igester. (b) For each anaerobic wastewater treatment process (reactor, deep lagoon, or shallow lagoon) you must report: (1) Weekly average COD or BOD 5

(2) Volume of wastewater entering each anaerobic wastewater treatment process for each week the anaerobic process was operated. concentration of wastewater entering each anaerobic wastewater treatment process, for each week the anaer obic 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.Page 24 of 28 (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

(c) For each anaerobic wastewater treatment process from which biogas is not recovered, you must report the annual CH generated by each anaerobic wastewater treatment process, calculated usi ng Equation II

– 1 or
II
– 2 of this subpart.

4

(d) For each anaerobic wastewater tr eatment process and anaerobic sludge digester from which some biogas is recovered, you must report: emissions, calculated using Equation II

– 3 of this subpart.

(1) Annual quantity of CH 4
(2) Total weekly volumetric biogas flow for each week (up to 52 weeks/year) that biogas is collected for destruction. recovered from the anaerobic process calculated using Equation II

– 4 of this subpart.

(3) Weekly average CH 4
(4) Weekly average biogas temperature for each week at which flow is measured for biogas collected for destruction, or statement that temperature is incorporated into monitoring equipment internal calculations. concentration for each week that biogas is collected for destruction.

(5) Whether flow was measured on a wet or dry basis, whether CH 4 concentration was measured on a wet or dry basis, andPage 25 of 28 if required for Equation II

– 4 of this subpart, weekly 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) Weekly ave rage 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
(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

annu al 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). collection efficiency (CE) used in Equation II

– 5 of this subpart.

(9) For each anaerobic process from which som e biogas is recovered, you must report the annual CH 4

(e) The total mass of CH emissions, as calculated by Equation II

– 6 of this subpart.

4 emitted from all anaerobic processes from which biogas is not recovered (calculated inPage 26 of 28 Equation II

– 3 of this subpart) 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.

In addition to the information required by §98.3(g), you must r etain the calibration records for all monitoring equipment, including the method or manufacturer's specification used for calibration. § 98.357 Records that must be retained.

Except as provided below, all terms used in this subpart have the same meaning given in the CAA and subpart A of this part. § 98.358 Definitions.

Biogas means the combination of CO 2, CH 4 , and other gases produced by the biological breakdown of organic matter in the absence of oxygen. Ethanol production means an operation that produces ethanol from the fermentation of sugar, starch, grain, or cellulosic biomass feedstocks, or the production of ethanol synthetically from petrochemical feedstocks, such as ethylene 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 FoodPage 27 of 28 Manufacturing). For information on NAICS codes, see http://www.census.gov/eos/www/naics/
. Industrial wastewater means wate r 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 prod uct. Examples of industrial wastewater include, but are not limited to, paper mill white water, wastewater from equipment cleaning, wastewater from air pollution control devices, rinse water, contaminated stormwater, and contaminated cooling water. Industr ial wastewater treatment sludge means solid or semi

solid material resulting from the treatment of industrial wastewater, including but not limited to biosolids, screenings, grit, scum, and settled solids. Wastewater treatment system

**Table II –**  **1 to Subpart II —**  **Emission Fac tors**  means the collection o f 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.

**Factors Default**  **value Units**  B 0 0.25

— for facilities monitoring COD Kg CH 4 /kg CODPage 28 of 28

**Table II –**  **1 to Subpart II —**  **Emission Fac tors** 

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

— anaerobic reactor 5 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