ILLINOIS POLLUTION CONTROL BOARD
    July 24, 2003
     
    IN THE MATTER OF: )
     
      
      
      
      
      
    )
    PETITION OF METROPOLITAN WATER ) AS 03-2
    RECLAMATION DISTRICT OF
    ) (Adjusted Standard - Land)
    GREATER CHICAGO FOR AN )
    ADJUSTED STANDARD FROM 35 ILL. )
    ADM. CODE 811, 812 AND 817 AND )
    MODIFACITON OF AS 95-4 (SLUDGE )
    APPLICATION) )
     
    OPINION AND ORDER OF THE BOARD (by G.T. Girard):
     
    This matter comes before the Board upon a petition for adjusted standard filed on
    February 11, 2003, by the petitioner, Metropolitan Water Reclamation District of Greater
    Chicago (District). The District requests an adjusted standard from 35 Ill. Adm. Code 811.204,
    811.314(c)(3), 812.313(d), 817.303 and 817.410(c)(2) and (3), which require using soil as a final
    cover at Illinois landfills. The District also requests a modification of its previously granted
    adjusted standard in I
    n re
    Petition of the Metropolitan Water Reclamation District of Greater
    Chicago for Adjusted Standard from 35 Ill. Adm. Code 811, 812, and 817 (Sludge Application),
    AS 95-4 (Aug. 24, 1995).
     
    The Board’s responsibility in this matter arises from the Environmental Protection Act
    (Act) (415 ILCS 5/1
    et seq.
    (2002)). The Board is charged to “determine, define and implement
    the environmental control standards applicable in the State of Illinois” (415 ILCS 5/5(b) (2002)),
    and to “grant . . . an adjusted standard for persons who can justify such an adjustment” (415
    ILCS 5/28/1(a) (2002)). More generally, the Board’s responsibility in this matter is based on the
    checks and balances integral to Illinois environmental governance: the Board is charged with the
    rulemaking and principal adjudicatory functions, and the Illinois Environmental Protection
    Agency (Agency) is responsible for carrying out the principal administrative duties.
     
    The Act also provides that “the Agency shall participate in [adjusted standard]
    proceedings.” 415 ILCS 5/28.1(d)(3) (2002). On April 4, 2003, the Agency filed a response to
    the petition, which the Board interprets as a recommendation. The Agency supports grant of an
    adjusted standard in part, and denial in part. On May 2, 2003, the District filed a reply to the
    Agency’s recommendation and an amended petition for adjusted standard, and waived its right to
    a hearing.
    1
    The Agency did not file a recommendation regarding the amended petition.
     
    Based upon the pleadings before it and upon review of the factors involved in the
    consideration of adjusted standards, for the reasons outlined below, the Board finds that the
    1
    The petition will be cited as “Pet. at __.” The amended petition will be cited as “Am. Pet. at
    __.” The Agency’s recommendation will be cited as “Ag. Rec. at __.” The District’s reply will
    be cited as “District Reply at __.”

     
    2
    District has met the requirements for an adjusted standard and grants relief from 35 Ill. Adm.
    Code 811.204, 811.314(c)(3), 812.313(d), 817.303 and 817.410(c)(2) and (3). The Board
    declines to modify the adjusted standard previously in AS 95-4, because the Board’s regulations
    do not provide for amending the conditions in an adjusted standard eight years after granting the
    adjusted standard.
     
    PROCEDURAL HISTORY
     
    On February 11, 2003, the District filed a petition for adjusted standard from 35 Ill. Adm.
    Code 811.204, 811.314(c)(3), 812.313(d), 817.303 and 817.410(c)(2) and (3), so that the
    District’s air-dried sludge material may be used at non-hazardous waste landfills instead of soil
    material for the top layer for final cover to support vegetation. Pet. at 1. Also on February 11,
    2003, the District filed a motion to incorporate the petition and attachments filed
    In re
    Petition of
    the Metropolitan Water Reclamation District of Greater Chicago for Adjusted Standard from 35
    Ill. Adm. Code 811, 812, and 817 (Sludge Application), AS 95-4 (Aug. 24, 1995). On March 6,
    2003, the Board granted the motion.
    2
     
     
    On April 4, 2003, the Agency filed its recommendation. The Agency recommends that
    the Board deny the petition to the extent the District seeks to use the term “biosolids” instead of
    “sludge” in the adjusted standard. Ag. Rec. at 5. The Agency is also concerned about the
    proposition that using sludge as final cover material will not result in environmental or health
    effects substantially and significantly more adverse than the effects the Board considered in
    adopting the rules of general applicability. Ag. Rec. at 5.
     
    On May 2, 2003, upon receipt of the Agency’s recommendation, the District filed an
    amended petition for an adjusted standard and a reply to the Agency’s recommendation. The
    District made two changes in the amended petition. District Reply at 19. The District withdraws
    the request to use the term “biosolids” rather than “sludge.” District Reply at 2; Am. Pet. at 12-
    13. The amended petition also corrects a typographical error in the proposed order. District
    Reply at 19. The District waives hearing in this matter. No hearing has been held.
     
    ADJUSTED STANDARD PROCEDURE
     
    In both a general rulemaking and a site-specific rulemaking, the Board is required to take
    the following factors into consideration: the existing physical conditions; the character of the
    area involved, including the character of the surrounding land uses; zoning classifications; the
    nature of the receiving body of water; and the technical feasibility and economic reasonableness
    of measuring or reducing a particular type of pollution. 415 ILCS 5/27(a) (2002). The general
    procedures that govern an adjusted standard proceeding are found at Section 28.1 of the Act and
    the Board's procedural rules at 35 Ill. Adm. Code 104. Section 28.1 also requires that the
    adjusted standard procedure be consistent with Section 27(a) of the Act.
     
    2
    The incorporated petition from AS 95-4 filed on March 31, 1995, will be cited as “AS 95-4 Pet.
    at __.”

     
    3
    The District seeks an adjusted standard from rules of general applicability. In
    determining whether an adjusted standard should be granted from a rule of general applicability,
    the Board must consider, and the District has the burden to prove, the factors at Section 28.1(c) of
    the Act (415 ILCS 5/28.1(c) (2002)):
      
    1) factors relating to that petitioner are substantially and significantly
    different from the factors relied upon by the Board in adopting the general
    regulation applicable to the petitioner;
      
    2) the existence of those factors justifies an adjusted standard;
      
    3) the requested standard will not result in environmental or health effects
    substantially and significantly more adverse than the effects considered by
    the Board in adopting the rule of general applicability; and
      
    4) the adjusted standard is consistent with any applicable federal law. 35 Ill. Adm.
    Code 104.426(a) and 415 ILCS 5/28.1.
     
    FACILITY DESCRIPTION
     
      
      
    The District is located in Cook County, Illinois, and serves the city of Chicago and 124
    suburban communities. AS 95-4 Pet. at 2. On average, the District treats about 1500 million
    gallons per day (MGD) of wastewater.
    Id
    . at 3. The wastewater is processed at seven water
    reclamation plants (WRPs).
    Id
    . at 15. Processing this wastewater generates about 200,000 dry
    tons of sludge in any given year.
    Id
    . at 3, 16. Although each WRP handles its sludge differently,
    the District generally processes its sludge using the following sequence of unit operations:
     
    1. Gravity thickening
     
    2. Centrifuge thickening
     
    3. Anaerobic digestion
     
    4. Centrifuge or lagoon dewatering
     
    5. Lagoon storage
     
    6. Air-drying (
    Id.
    at 16-17).
     
    Solids processing at the District begins with the concentration of primary and secondary
    sludge in gravity concentration tanks.
    Id.
    at 17. The sludge is then anaerobically digested in
    heated (95° ± 1°F) high rate digesters for approximately 20 days, to reduce odor potential and
    destroy pathogens.
    Id.
    After anaerobic digestion, the liquid sludge (approximately 4% solids) is
    either mechanically dewatered using high speed centrifuges to approximately 25% to 30% solids
    or lagoon dewatered to produce 15% solids.
    Id.
    Both the liquid sludge and the dewatered
    centrifuge sludge is stored in lagoons to reduce its odor potential and further destroy pathogens.

     
    4
    Id.
    The sludge stored in lagoons is air-dried on asphalt-paved drying beds, using a mechanical
    agitation process to accelerate drying and further reduce pathogens.
    Id
    . All air-dried sludge has
    a high solids content of about 60%, is soil-like in appearance, low in pathogens and high in plant
    nutrients.
    Id
    .
     
    The District ultimately utilizes the majority of its sludge as a fertilizer, soil amendment,
    or soil substitute.
    Id
    . at 17. After years of planning, the following are the options which the
    District has chosen for final disposition of its sludge product:
     
    1. Sludge application to land in Fulton County, Illinois.
     
    2. Sludge application to land at the Hanover Park water reclamation plant, Hanover
    Park, Illinois.
     
    3. Landscaping at District WRPs.
     
    4. Distribution to large-scale
    users for landscaping purposes (
    e.g.
    , Underwriters
    Laboratories, Worth Park District, Russell Road Interchange for the Tollway
    Commission.
     
    5. Final protective layer for landfills.
     
    6. Daily cover for landfills (
    Id.
    at 17-18).
     
    REQUESTED RELIEF
     
    The District offers the following language for the requested adjusted standard:
     
    1. This adjusted standard applies only to the air-dried sludge product
    generated by the Metropolitan Water Reclamation District of
    Greater Chicago (District).
     
    2. District sludge that complies with the conditions in paragraph 3
    below is approved as an alternative to the soil material standard at
    the inert waste, the putrescible (MSWLF) and chemical waste
    landfills, or the steel and foundry industry potentially usable and
    low risk waste classes of landfills regulated at 35 Ill. Adm. Code
    810-815 and 817, for application as the final protective layer, as
    the final cover. The sections where the soil material standard is
    used are 35 Ill. Adm. Code 811.204, 811.314(c)(3), 812.313(d),
    817.303 and 817.410(c)(2) and (c)(3).
     
    3. When providing sludge for the applications enumerated in
    paragraph 2, the District shall provide air-dried sludge as described
    in its petition for an adjusted standard (AS95-4) and in its motion

     
    5
    for modification and processing in accordance with the following
    conditions:
     
    a. Anaerobic digestion:
    i. at 35 to 55 degrees Celsius, except when a digester
    temperature, lowered temporarily due to digester
    feedings, might occasionally and briefly fluctuate
    below the minimum, and
     
    ii. for a minimum of 15 days or longer with digestion
    temperatures and times (i.e., “Values for the mean
    cell residence time and temperature shall be
    between 15 days at 35 to 55 degrees Celsius and 60
    days at 20 degrees Celsius”) managed so as to
    ensure that the District’s anaerobically digested
    product is consistent with the USEPA’s pathogen
    treatment requirements for a Class B sludge; (40
    CFR Part 503, Appendix B(A)(3)); and
     
    b. Storage in lagoons for a minimum of one and half years
    after the final addition of sludge; and
     
    c. Air-drying for a minimum of 4 weeks, or as necessary to
    achieve a solids content of 60 percent.
     
    4. When providing sludge for the applications enumerated in
    paragraph 2, the District shall limit the sludge provided to amounts
    that are sufficient for a final depth of three feet as compacted using
    normal landscaping practices.
     
    5. The District will report to the Agency the start up, discontinuance,
    and quality of sludge deliveries to each facility.
     
    6. District sludge when used in compliance with this adjusted
    standard, is not a waste. Am. Pet. at 12-13.
     
    REGULATORY FRAMEWORK
      
     
    The District seeks and adjusted standard from 35 Ill. Adm. Code 811.204, 811.314(c)(3),
    812.313(d), 817.303 and 817.410(c)(2) and (3).
     
    Section 811.204 provides:
     
    Final Cover
     

     
    6
    A minimum of 0.91 meter (three feet) of soil material that will support vegetation
    which prevents or minimizes erosion shall be applied over all disturbed areas.
    Where no vegetation is required for the intended postclosure land use, the
    requirements of Section 811.205(b) will not apply; however, the final surface
    shall still be designed to prevent or minimize erosion.
     
    Section 811.314(c)(3) provides:
     
    Standards for the Final Protective Layer
     
    1) The final protective layer shall cover the entire low permeability layer.
     
    2) The thickness of the final protective layer shall be sufficient to protect the
    low permeability layer from freezing and minimize root penetration of
    the low permeability layer, but shall not be less than 0.91 meter (3 feet).
     
    3) The final protective layer shall consist of soil material capable of
    supporting vegetation.
     
    4) The final protective layer shall be placed as soon as possible after
    placement of the low permeability layer to prevent desiccation, cracking,
    freezing or other damage to the low permeability layer.
     
    Section 812.313(d) provides:
     
    The permit application shall contain documentation for the final cover system to
    demonstrate compliance with 35 Ill. Adm. Code 811.314, including:
    * * *
    d) A description of final protective cover, including a description of the soil
    and the depth necessary to maintain the proposed land use of the area;
    * * *
    Section 817.303 provides:
     
    Final Cover
     
    Unless otherwise specified in a permit or other written Agency approval, a
    minimum of 0.46 meters (1.5 feet) of soil material that will support vegetation
    which prevents or minimizes erosion shall be applied over all disturbed areas.
     
    Section 817.410(c)(2) and (3) provide:
     
    c) Standards for the final protective layer:
    * * *
    2) The thickness of the final protective layer shall be sufficient to
    protect the low permeability layer from freezing and minimize root

     
    7
    penetration of the low permeability layer, but shall not be less than
    0.46 meter (1.5 feet).
     
    3) The final protective layer shall consist of soil material capable of
    supporting vegetation.
    * * *
    PREVIOUSLY GRANTED AS 95-4
     
    On August 24, 1995, the Board granted the District an adjusted standard from 35 Ill.
    Adm. Code 811.204, 811. 314(c)(3), 812.313(d), 817.303, and 817.410(c)(2) and (3).
    In re
    Petition of the Metropolitan Water Reclamation District of Greater Chicago for Adjusted
    Standard from 35 Ill. Adm. Code 811, 812, and 817 (Sludge Application), AS 95-4 (Aug. 24,
    1995). The relief granted in AS 95-4 was conditioned upon the sludge being processed in
    accordance with certain conditions set forth in the Board’s order. Am. Pet. at 3. The conditions
    included “anaerobic digestion at 95° ± 1°F for a minimum of 15 days or longer, as necessary to
    ensure that the District’s air-dried sludge product will meet the United States Environmental
    Protection Agency’s Part 503 (40 C.F.R. §503) pathogen requirements for a Class B sludge;
    storage in lagoons for a minimum of one and a half years after the final addition of sludge; and
    air drying for a minimum of four weeks, or as necessary to achieve a solids content of 60%.”
    Am. Pet. at 3.
     
    The District requests another adjusted standard because upon reviewing AS 95-4, the
    District realized that the anaerobic digestion temperature requirements of 95° ± 1 °F in the
    Board’s opinion and order in AS 95-4 may not always be met at the District’s WRPs that
    produce sewage sludge used under AS 95-4. Am. Pet. at 3-4. Therefore, the District requests
    another adjusted standard that modifies the current specifications for anaerobic digestions of
    sludge in AS 95-4, so that the specifications are consistent with the Class B pathogen
    requirements of the Part 503 Sewage Sludge regulations. Am. Pet. at 8. Specifically, the District
    notes that the current wording of AS 95-4 does not consider the temperature fluctuations that
    sometimes occur, but that these types of fluctuations are implicitly accepted by the USEPA in the
    Part 503 Sewage Sludge regulations (40 C.F.R. §503). Am Pet. at 7.
     
    The District would prefer if the Board would modify the adjusted standard in AS 95-4,
    rather than have an entirely new adjusted standard with a different docket number. District
    Reply. at 3. However, as the District notes, the Board’s rules do not provide for a method to
    amend an adjusted standard eight years after the adjusted standard was granted. District Reply at
    3. Therefore, rather than modify the previously granted adjusted standard in AS 95-4, the Board
    will grant an entirely new adjusted standard.
     
    ARGUMENT
     
    Substantially Different Factors
     
    The District argues that using the District’s air-dried sludge was never discussed in the
    landfill regulatory proceeding. AS 95-4 Pet. at 55. The District concludes that the factors
    relating to the use of District sludge are substantially and significantly different from those relied

     
    8
    on in relation to the soil requirement.
    Id.
    at 55. The District also notes that until recently, the
    District was uncertain how ongoing state and federal regulatory proceedings addressing the
    management of landfills generally, and specifically sludge, would affect the District’s sludge
    management program regarding landfill cover application.
    Id
    . at 56.
     
    The Agency’s recommendation does not address whether the factors relating to the
    District are substantially and significantly different from the factors relied upon by the Board in
    adopting the general regulation applicable to the to the District.
     
    Justification
     
    The District argues that no effort that the District would make will result in the
    compliance with the regulatory requirement to use soil material.
    Id
    . at 24. The District also
    contends that the District’s petition shows that the District has a long-time investment in
    innovative technologies to put sludge to productive uses.
    Id.
    at 56. The District states that losing
    the beneficial productive use of air-dried sludge would be both environmentally and
    economically significant.
    Id
    . at 56.
      
    The Agency’s recommendation does not address the District’s comments regarding
    justification, except to say that the Agency does not take issue with the District’s statement that
    the regulations of general applicability do not specify a level of justification required to qualify
    for an adjusted standard. Ag. Rec. at 4.
     
    Environmental Effect
     
    The District states that the adjusted standard petition has shown that not only are there no
    substantially or significantly more adverse environmental or health effects, but in some respects,
    the effects under the adjusted standard are superior to those effects considered by the Board
    when the Board established the use of soil material for the final protective layer and intermediate
    cover in the landfill regulations. AS 95-4 Pet. at 57. The District contends that the sludge
    produced by the District is of consistent quality, can be worked like soil, contains fertilizer for
    encouraging speedy vegetative growth, and can protect the low permeability layer in the final
    cover from freezing.
    Id
    . at 57.
     
    The Agency responds that that the Agency's Bureau of Water has observed elevated
    levels of ammonia in the storm water runoff at Land and Lakes #3 landfill, which has received
    sludge from the District. Ag. Rec. at 2. The Agency does not believe that elevated ammonia
    levels in storm water runoff is characteristic of soil material, and may reflect an environmental
    concern regarding the use of air-dried sludge. Ag. Rec. at 3.
     
    The Agency also states that it is unclear whether AS 95-4 adequately addressed the
    quantitative and qualitative impact on ammonia from the sludge when sludge is used as final
    cover on landfills. Ag. Rec. at 4. The Agency believes additional monitoring and reporting
    should be required by the landfills using the sludge as final cover under this adjusted standard.
    Ag. Rec. at 4. The Agency further states that the elevated levels of ammonia may show that
    using sludge instead of soil as the final cover may result in environmental or health effects

     
    9
    substantially and significantly more adverse than the effects considered by the Board in adopting
    the rules of general applicability. Ag. Rec. at 4.
     
    In its reply, the District argues that the water runoff issue was thoroughly addressed to the
    Board’s satisfaction in AS 95-4. District Reply at 5. The District argues that Land and Lakes #3
    was never supplied with the District’s sludge from AS 95-4. District Reply at 5. The District
    also contends that any unsuitable sludge shipped to Land and Lakes #3 may have been
    improperly accumulated or held in an area that lacked adequate drainage, runoff, and erosion
    controls. District Reply at 5.
     
    The District notes that in support of its petition in AS 95-4, the District noted the
    following:
     
    1) No adverse impact on surface water and groundwater quality was observed at a
    site in Fulton County where the District had been applying sludge for over 22
    years.
     
    2) After monitoring the groundwater quality for 10 years at 103rd and Doty
    Municipal Solid Waste Landfill where 225 acres were covered with a top layer of
    District sludge, the water quality had not changed significantly.
     
    3) Additionally, a study by J.B. Farrell,
    et al.
    concluded that the addition of sludge to
    landfills improved the leachate quality. District Reply at 7.
     
    The District argues that the same facts that the Board found persuasive in AS 95-4 regarding the
    effects of sludge as a top layer still exist today. District Reply at 8.
     
    Additionally, the District argues that the Agency did not establish a correlation between
    ammonia levels at the Land and Lakes landfills and unsuitable District Sludge. District Reply at
    12. The District further contends that to the District’s knowledge, sewage sludge was not used as
    a final cover and was co-disposed because sewage sludge typically did not meet the lagoon aging
    and drying requirements in AS 95-4. District Reply at 14. Additionally, the District asserts that
    the Agency statement that the District sewage sludge used as a final vegetative cover was the
    source of ammonia nitrogen in landfill runoff is inaccurate. District Reply at 14.
     
    Regarding the Agency’s recommendation that additional monitoring and reporting should
    be required by the landfills using the sludge as final cover under this adjusted standard, the
    District responds that such a requirement would be overly burdensome and will present a severe
    impediment to the cost effective recycling of a valuable product. District Reply at 15. The
    District also responds that under the current regulatory structure, the Agency has a sufficient
    opportunity to review the use of sludge in the final protective layers at Illinois landfills before it
    is delivered. District Reply at 16.

     
    10
     
      
      
    Consistency with Federal Law
     
    The District argues the petition for adjusted standard is consistent with the Part 503
    Sewage Sludge Regulations and the USEPA’s subsequent revisions. Am. Pet. at 14. The
    District further states that the consistency of the proposed standard with existing federal law is
    the same as that described in the petition for AS 95-4. Am. Pet. at 14. Additionally, the
    requested adjusted standard is consistent with the USEPA’s guidance document and site-specific
    certification for the process to further reduce pathogens (PFRP) granted by USEPA, Region V.
    Am. Pet. at 14.
     
    The Agency agrees that the consistency of the proposed standard with existing federal
    law is the same as that described in the petition for AS 95-4. Ag. Rec. at 4. However, the
    Agency is uncertain about the relevance regarding the consistency of the proposed adjusted
    standard with federal regulations that do no apply to solid waste landfills, and with USEPA
    guidance documents. Ag. Rec. at 5.
     
    FINDINGS
     
    Based on its review of the record in this matter, and the showings requisite for grant of an
    adjusted standard, the Board finds that grant of an adjusted standard in the instant case is
    warranted.
     
    Substantially Different Factors
     
    The Board first finds that the District has established that the Board did not consider the
    use of sludge as final cover in the adopting the regulations of general applicability. Thus, the
    Board finds that the factors surrounding this are substantially and significantly different from
    those considered by the Board in adopting the rules of general applicability.
     
    Justification
     
     
    The Board finds that the District has demonstrated the use of sludge is beneficial and
    cost-efficient. Therefore, the Board finds that the factors relating to the adjusted standard
    request justify an adjusted standard.
     
    Environmental Effect
     
      
    The only contested issue in this proceeding is whether granting the adjusted standard
    would result in substantially or significantly more harmful health and environmental effects. The
    Board finds that the District has adequately refuted the Agency’s concerns that using sludge as
    final cover instead of soil may lead to elevated levels of ammonia. The Agency based its
    allegation on one landfill, Land and Lakes Landfill #3, having elevated levels of ammonia in
    storm water runoff and having received District sludge. The District responded that Land and
    Lake Landfill #3 never received District sludge from AS 95-4. Additionally, the District
    previously provided information in AS 95-4 that showed that water quality at both a site in

     
    11
    Fulton County and at 103rd and Doty Municipal Solid Waste Landfill, had not changed
    significantly after years of applying sludge.
     
    Additionally, the Board declines to order additional monitoring and reporting at the sites
    that receive District sludge. The Agency did not refute the District’s evidence that sludge has
    been safely used, and therefore ordering additional monitoring and reporting is not justified.
     
    The Board is persuaded that the use of sludge will not result in substantially or
    significantly more harmful health and environmental effects than were considered in adopting
    the rule of general applicability.
     
    Consistency with Federal Law
     
    The Board finds, as the District suggests, that granting an adjusted standard is consistent
    with federal law.
     
    SUMMARY
     
    For the reasons detailed above, the Board grants the District an adjusted standard from 35
    Ill. Adm. Code 811.204, 811.314(c)(3), 812.313(d), 817.303 and 817.410(c)(2) and (3).
     
    This opinion constitutes the Board’s findings of fact and conclusions of law.
     
    ORDER
     
    The Board grants an adjusted standard to the Metropolitan Water Reclamation District of
    Greater Chicago from 35 Ill. Adm. Code 811.204, 811.314(c)(3), 812.313(d), 817.303 and
    817.410(c)(2) and (3) subject to the following conditions:
     
    1. This adjusted standard applies only to the air-dried sludge product
    generated by the Metropolitan Water Reclamation District of Greater
    Chicago (District).
     
    2. District sludge that complies with the conditions in paragraph 3 below is
    approved as an alternative to the soil material standard at the inert waste,
    the putrescible (MSWLF) and chemical waste landfills, or the steel and
    foundry industry potentially usable and low risk waste classes of landfills
    regulated at 35 Ill. Adm. Code 810-815 and 817, for application as the
    final protective layer, as the final cover. The sections where the soil
    material standard is used are 35 Ill. Adm. Code 811.204, 811.314(c)(3),
    812.313(d), 817.303 and 817.410(c)(2) and (c)(3).
     
    3. When providing sludge for the applications enumerated in paragraph 2,
    the District shall provide air-dried sludge as described in its petition for an
    adjusted standard in AS 03-2 and processed in accordance with the
    following conditions:

     
    12
     
    a. Anaerobic digestion:
    j. at 35 to 55 degrees Celsius, except when a digester
    temperature, lowered temporarily due to digester feedings,
    might occasionally and briefly fluctuate below the
    minimum, and
     
    ii. for a minimum of 15 days or longer with digestion
    temperatures and times (i.e., “Values for the mean cell
    residence time and temperature shall be between 15 days at
    35 to 55 degrees Celsius and 60 days at 20 degrees
    Celsius”) managed so as to ensure that the District’s
    anaerobically digested product is consistent with the
    USEPA’s pathogen treatment requirements for a Class B
    sludge; (40 C.F.R. §503, Appendix B(A)(3)); and
     
    b. Storage in lagoons for a minimum of one and half years after the
    final addition of sludge; and
     
    c. Air-drying for a minimum of 4 weeks, or as necessary to achieve a
    solids content of 60 percent.
     
    4. When providing sludge for the applications enumerated in paragraph 2,
    the District shall limit the sludge provided to amounts that are sufficient
    for a final depth of three feet as compacted using normal landscaping
    practices.
     
    5. The District will report to the Agency the start up, discontinuance, and
    quality of sludge deliveries to each facility.
     
    6. District sludge when used in compliance with this adjusted standard, is not
    a waste.
     
    IT IS SO ORDERED.
     
    Section 41(a) of the Environmental Protection Act provides that final Board orders may
    be appealed directly to the Illinois Appellate Court within 35 days after the Board serves the
    order. 415 ILCS 5/41(a) (2002);
    see also
    35 Ill. Adm. Code 101.300(d)(2), 101.906, 102.706.
    Illinois Supreme Court Rule 335 establishes filing requirements that apply when the Illinois
    Appellate Court, by statute, directly reviews administrative orders. 172 Ill. 2d R. 335. The
    Board’s procedural rules provide that motions for the Board to reconsider or modify its final
    orders may be filed with the Board within 35 days after the order is received. 35 Ill. Adm. Code
    101.520;
    see also
    35 Ill. Adm. Code 101.902, 102.700, 102.702.

     
    13
     
     
    I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, hereby certify that the
    Board adopted the above opinion and order on July 24, 2003, by a vote of 6-0.
     
     
      
      
      
      
      
      
     
    Dorothy M. Gunn, Clerk
    Illinois Pollution Control Board
     
     
     

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