### Please note that some provisions of this approval are shown in **strikeout for the sole** 

**purpose of showing what provisions are not incorporated into the Massachusetts Regional**  **Haze State Implementation Plan (SIP). The provisions shown in strikeout are a part of th e**  **approval and are state enforceable.**

**This information is available in alternate format. Call Mi chelle Waters**  **- Ekanem,**  **Diversity Director ,**  **at 617 -** **292 -**  **5751. TDD# 1 -** **866 -**  **539 -** **7622 or 1 -** **617 -**  **574 -** **6868** MassDEP W eb site : www. mass.gov/dep Printed on Recycled Paper **March 14, 2012** Mr. Jairaj Gosine RE: **SAUGUS**
- Metropolitan Wheelabrator Saugus, Inc. Boston/Northeast Region 100 Salem Turnpike 310 CMR 7.08(2)

- Municipal Waste Combustors Saugus, MA 01906 Application No. MBR
-98
-ECP
-006 Transmittal No. W003302 **EM ISSION CONTROL PLAN**  **MODIFIED FINAL APPROVAL** 
Dear Mr. Gosine: The Metropolitan Boston/Northeast Regional Office (NERO) of the Department of Environmental Protection, Bureau of Waste Prevention (“MassDEP”), has reviewed your request, dated January 9, 2012 , to mo dify the Municipal Waste Com

bustor (MWC) Emission Control Plan (ECP) Final Approval issued to you by MassDEP , pursuant to 310 CMR 7.08(2), on September 28, 2007 . This request included a proposal to mo dify certain emission limits contained in your ECP Final Approval for equipment at your facility located at 100 Salem Turnpike in Saugus, Massachusetts. The purpose of 310 CMR 7.08(2) was to provide emission limitations for the control of certain designated pollutants emitted from MWCs, in accordance with the requirements contained in Sections 111(d) and 129 of the Clean Air Act. 310 CMR 7.08(2) established requirements for the following: Operating Practices [Carbon Monoxide (CO) , F lue Gas Tem

perature, Load Level], Metals [Mercury (Hg), Lead (Pb), Cadmium (Cd)] , Particulate Matter (PM), Opacity, Organic s (Dioxins/Furans), Ac id Gases [Sulfur Dioxide ( SO 2) and Hydrogen Chloride (HCl)], Nitrogen Oxides (NO x) , and Fugitive Ash Emissions. Pursuant to 310 CMR 7.08(2)(j)7 ., MassDEP has mo dified your ECP Final Approval in order to include additional NO x and Hg emission limits and to reduce the PM, Cd, and Pb emission limits contained in the original, September 28, 2007 ECP Final Approval. The NO x emission limit wa s proposed in order for the Commonwealth to meet its obligation under Section 169A of the Clean Air Act to address regional haze, as described in MassDEP’s Regional Haze State Implementation Plan. Monitoring and record keeping for this new NO x emission limit shall c ommence 180 days after issuance of this ECP Final Approval. In addition, the Hg, PM, Cd, and Pb emission limits were proposed to reflect revisions to the federal 40 CFR Part 60 , Subpart Cb Emission Guidelines for Existing Large Municipal Waste Combustors promulgated on May 1 0, 2006 and which went into effect for the subject facility on May 10, 2011 (40 CFR Part 60.39b(h))
. MassDEP has determined that your submittal is administratively and technically complete and that the proposed modifications are in conf ormance with current air pollution control engineering practices and hereby **mo difies**  **your MW** **C ECP Final**  **Approval** as listed below.

In Table 2 of the ECP Final Approval, a) Include an Oxides of Nitrogen (NO x) limit of 185 ppm by volume at 7% O 2 dry basis, 30
- day rolling average ; and, b) Reduce the Particulate Matter (PM) limit from 27 milligrams per dry standard cubic meter (mg/dscm) at 7% O 2 to 25 mg/dscm at 7% O 2 ; and, c) Reduce the Cadmium (Cd) limit from 0.040 mg/dscm at 7% O 2 to 0.035 mg/dscm at 7% O 2 ; and, d) Reduce the Lead (Pb) limit from 0.440 mg/dscm at 7% O 2 to 0.400 mg/dscm at 7% O 2 ; and, e) Replace the Mercury (Hg) limit of 0.080 mg/dscm at 7% O 2 (during any single quarterly com pliance test) with a Hg limit of 0.050 mg/dscm or 15% of the potential emission concentration (85% reduction by weight) and not to exceed 0.080 mg/d scm at 7% O 2 , whichever is less stringent (during any single quarterly compliance test). In the first sentence of

T able 2, Note 4 , delete the phrase “Based on the current NOx limit of 20 5 ppm by volume at 7% O 2 dry basis ,”. Furthermore, add Notes 6 and 7 to Table 2. As such, MassDEP replace s Pages 4 and 5 of your September 28, 2007 ECP Final Approval with the two (2) pages attached hereto
. All other requirements as contained in your Septem ber 28, 2007 ECP Final Approval shall remain in full force and effect. MassDEP issued a Proposed Modification to your ECP Final Approval on January 25, 2012. Pursuant to 310 CMR 7.08(2)(j)7., public notice of this proposed modified ECP Final Approval was published in accordance with M.G.L. c. 30A in the Lynn Daily

Item on F ebruary 3 , 2012 and in the Saugus Advertiser on February 9, 2012 , followed by a 30
- day public comment period
. As such, the public comment period ended on March 12, 2012. During the pub lic comment period, no comments were received. MassDEP has determined that the filing of an Environmental Notification Form (ENF) with the Secretary of Energy & Environmental Affairs, for air quality control purposes, was not required prior to this action by MassDEP. Notwithstanding this determination, the Massachusetts Environmental Policy Act (MEPA) and Regulation 301 CMR 11.00 Section 11.04, provide certain "Fail Safe Provisions" which allow the Secretary to require the filing of an ENF and/or Environmental Im

pact Report at a later time. The facility submitted an ENF on February 2, 1998 solely because the project could have triggered the review threshold for financing by a public agency [310 CMR 11.24(4)(a)1.]. On March 13, 1998, the Executive Office of Environmental Affairs issued a Certificate allowing for the emission control project to proceed without the need to prepare an Environmental Impact Report. The Certificate stated, “the project will have significant air quality benefits; other environmental impacts should prove minor; and the review of the ENF has served adequately to disclose impacts/benefits and mitigation.” Please be advised that this Approval does not negate the responsibility of the facility to comply with this or any other applicable federal, state, or local regulations now or in the future. Nor does this Approval imply compliance with any applicable federal, state or local regulations now or in the future. Should you have any questions concerning this Approval, please contact Cosmo B uttaro by telephone at (978) 694
- 3281, or in writing at the following address: Department of Environmental Protection (MassDEP), 205B Lowell Street, Wilmington, Massachusetts 01887.Sincerely,

Cosmo Buttaro James E. Belsky Environmental Engineer Permit Chief Bureau of Waste Prevention
cc: Tow

n Hall, 298 Central Street, Saugus, MA 01906 Board of Health, Town Hall, Saugus, MA 01906 Fire Headquarters, 27 Hamilton Street, Saugus, MA 01906 Metropolitan Area Planning Council, 60 Temple Place, Boston, MA 02111 United States Environmental Protection Agency (USEPA)

– New England Regional Office, 5 Post Office Square, Suite 100, Mail Code OEP05
-2, Boston, Massachusetts 02109
- 3912 , Attn: Manager

– Air Permits Program MassDEP/Boston: Yi Tian (E

-Copy) MassDEP/NERO: Marc Altobelli (E

-Copy & Hard Copy), Mary Persky (Hard Copy), Cosmo Buttaro**APPLICABLE REQUIREMENTS**

A. EMISSION LIMITS AND RESTRICTIONS The facility is subject to the emission limits/restrictions as contained in Table 2 below: **Table 2 +** EU# RESTRICTION/

OPERATING PRACTICES POLLUTANT EMISSION LIMIT/STANDARD **5** APPLICABLE REGULATION AND/OR APPROVAL NUMBER EU1, EU2 PM Control Device Inlet

Temperature: < 17  C (30  F) above maximum demonstrated PM control device inlet temperature, calculated in 4
-hour block arithmetic averages, measured during the most recent dioxin/furan compliance test in which compliance is achieved **3** 310 CMR 7.08(2)(f)2.
SO 2 < 29 ppm by volume at 7% O 2 dry basis or 75%

reduction by weight or volume, whichever is less stringent (24

-hour geometric mean) 40 CFR 60.33b(a) 310 CMR 7.08(2)(f)2
. PM < 25 mg/dscm at 7% O 2 **1 , 6** 

NO x < 205 ppm by volume at 7% O2 dry basis

(24

-hour daily arithmetic average) 310 CMR 7.08(2)(f)3.
< 185 ppm by volume at 7% O2 dry basis (30

-day rolling average) **7** 40 CFR Part 51.308(e)

**+ Table 2 Notes:** 

**3** No person subject to 310 CMR 7.08(2) shall: 1. cause, suffer, allow or permit a municipal waste combustor unit to operate at a load level (based on steam flow) greater than 110 percent of the maximum demonstrated municipal waste combustor unit load calculated in 4
-hour block arithmetic averages, measured during the most recent dioxin/furan compliance test in which compliance is achieved; and 2. cause, suffer, allow or permit a municipal waste combustor unit to operate at a temperature, measured at the PM control device inlet, exceeding 17  C (30  F) above the maximum demonstrated PM control devic e temperature, calculated in 4
-hour block arithmetic averages, measured during the most recent dioxin/furan compliance test in which compliance is achieved. During any

nine

-month dioxin/furan compliance test and the 2 weeks preceding each nine

month dioxin/furan compliance test, municipal waste combustor unit load limit and PM control device temperature limitations are not applicable. Municipal waste combustor unit load limit and PM control device temperature limitations may be waived, if prior approval is granted by MassDEP, for the purposes of evaluating systemperformance, testing new technology or control technologies, diagnostic testing, or related activities for the purpose of improving facility performance provided that there is an improvement in controlling air pollution, or advancing the state

- of

-the

-art for controlling facility emissions.
**5** Emission limits/standards in Tab le 2 and under 310 CMR 7.08 apply a t all times except during periods of start-up, shutdown or malfunction as defined in 40 CFR Part 60, Subpart Eb, 60.58b, as amended. **6** The 310 CMR 7.08 (2)(f)2. limits of 27 mg/dscm at 7% O 2 are less restrictive than the listed Table 2 emission limits of 25 mg/dscm at 7% O2 for PM, respectively (40 CFR 60.33b(a)). **7** Monitoring and record keeping for the NO x limit of 185 ppm by volume at 7% O 2 dry basis (30

-day rolling average) shall commence 180 days after issuance of this ECP Final Approval. NO x Continuous Emissions Monitoring Systems installed and operated in accordance with 310 CMR 7.08(2)(g) shall be used to demonstrate compliance with said limit. Record keeping, including the 30
-day rolling averages, shall be in accordance with 310 CMR 7.08(2)(h), as applicable. Reporting, including deviations from said limit, shall be in accordance with 310 CMR 7.08(2)(i).
**+ Table 2 Key:** 

EU# = Emission Unit Number mg/dscm = milligram per dry standard cubic meter ng/dscm = nanogram per dry standard cubic meter ppm = parts per million Cd = Cadmium Pb = Lead HCl = Hydrogen Chloride Dioxin/Furan = tetra

- through octa

- chlorinated dibenzo

-p - dioxins and dibenzofurans PM = Particulate Matter SO2 = Sulfur Dioxide CO = Carbon Monoxide NOx = Nitrogen Oxides Hg = Mercury NH3 = Ammonia O2 = Oxygen % = percent