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AmbientAirPlanAppendixDModification 9/19/2016 APPENDIX D Site Selection for DRR Monitoring Near the Lhoist – Montevallo, Alabama Location

Site Selection for DRR Monitoring Near the Lhoist ... · Site Selection for DRR Monitoring Near the Lhoist – Montevallo, Alabama Location The site chosen to meet the Data Requirements

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Page 1: Site Selection for DRR Monitoring Near the Lhoist ... · Site Selection for DRR Monitoring Near the Lhoist – Montevallo, Alabama Location The site chosen to meet the Data Requirements

AmbientAirPlanAppendixDModification  9/19/2016 

  

APPENDIX D

Site Selection for DRR Monitoring Near the Lhoist – Montevallo, Alabama Location

   

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AmbientAirPlanAppendixDModification  9/19/2016 

  

Site Selection for DRR Monitoring Near the Lhoist – Montevallo, Alabama Location

The  site  chosen  to meet  the Data Requirements Rule  for  the affected  facility,  Lhoist – Montevallo  is 

described below.  Included is a site description and the report of modelling used to support the placement 

of the monitor.  The site selected is near the main facility entrance along Highway 25 to the northwest of 

the plant.  The site will be referred to as Hwy25‐west.  This site is in Shelby County in the Birmingham‐

Hoover MSA. 

The ADEM Air Division  has  reviewed modeling  associated with  the  Lhoist‐Montevallo  facility  for  the 

placement of a SO2 monitor to support compliance with the 1‐hour SO2 NAAQS.  The modeling followed 

recommendations  outlined  in  EPA’s Modeling  Technical  Assistance  Document  (TAD).   The  ADEM  Air 

Division agrees that the modeling was performed consistent with the TAD.  

In addition, staff from the Air Division, the Air Assessment Unit, and US EPA Region 4 visited the facility to 

determine if the proposed site would meet 40 CFR 58, Appendix E probe siting criteria.   ADEM found that 

there  are  no  obstructions  or  other  influences  that  will  keep  the  site  from  meeting  Appendix  E 

requirements for probe siting. 

According  to  Appendix  D  and  the  TAD  the  monitor  will  be  classified  as  middle  scale  since  it  is 

approximately 200 meters from the source and the objective will be Highest Concentration.   

The monitor will  be  operated  by  a  Lhoist  contactor  as  part  of  the ADEM  Primary Quality Assurance 

Organization (PQAO) following the ADEM QAPP.  The ADEM QAPP is being modified to include industry 

monitoring and specifically for this DRR monitor.  The QAPP will be submitted to US EPA Region 4 – SESD 

to be approved prior to the start monitoring.  Lhoist specific SOPs will be submitted for ADEM and EPA 

approval no later than 6 months after the start of monitoring.  Monitoring and data submittal will meet 

the quality assurance requirements of 40CFR58 A.  A reference or equivalent method will be used monitor 

sulfur dioxide as required by 40 CFR 58, Appendix C.  The monitor will continuously measure sulfur dioxide 

in the ambient air and will report 1‐hour averages and 5‐minute averages to EPA’s Air Quality System 

(AQS) database. 

In summary, the proposed site and monitoring activities will meet the requirements of 40 CFR part 58, 

Appendices A, B, C, D and E with the monitoring objective of Highest Concentration. 

 

   

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AmbientAirPlanAppendixDModification  9/19/2016 

  

 Lhoist North America of Alabama, LLC > Montevallo Plant       01‐117‐9001 7444 State Hwy 25                Latitude:  33.0928 Calera, Alabama 35040                Longitude:  ‐86.8072 Shelby County 

 

AERIAL PHOTOGRAPH  ¼ mile radius     

 

Pollutant  Scale 

Type  

Monitoring Objective/CBSA 

Meth

od 

Schedule 

NAAQS 

Proposed Start Date 

Comment 

SO2  M  S  Highest Concentration – SO2 DRR / Birmingham‐Hoover MSA 

P  C  Y  1/1/2017   

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AmbientAirPlanAppendixDModification  9/19/2016 

  

 

                    Proposed Monitor Location Facing North                        Proposed Monitor Location Facing South  

          Proposed Monitor Location Facing East               Proposed Monitor Location Facing East  

      Proposed Site Monitoring Specifications 

Monitor  Height of inlet 

Distance of inlet from supporting structure 

Distance of probe or inlet from trees 

Distance of probe or inlet from dripline of trees 

Distance of probe or monitor from roadway  

Type of ground cover around site 

Probe material 

Bell Housing Material 

SO2  ~4m  >1m  >50m  >50m  >20m  Grass and pavement 

Teflon  Teflon 

P= pulsed fluorescent monitor S= SLAMS C= Continuous Operation M= Middle Scale  

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