Document XO5p577GxaeyO3d63BMD1ZO8J

MEMORANDUM SUBJECT: CLEAN AIR ACT INSPECTION REPORT Michigan Paving & Materials Co., Lansing, Michigan FROM: Brianna Fenzl, Environmental Engineer AECAB (IL/IN) THRU: Nathan Frank, Section Supervisor AECAB (IL/IN) TO: File BASIC INFORMATION Facility Name: Michigan Paving & Materials Co. Facility Location: 16777 Wood Rd, Lansing, Michigan Date of Inspection: May 16, 2024 EPA Inspector(s): 1. Brianna Fenzl, Environmental Engineer 2. Aileen Drum, Physical Scientist Other Attendees: 1. Norm Holm, Commercial Manager 2. Sue Hanf, Environmental Engineer 3. Brooks Cozert, Plant Operator Contact Email Address: shanf@mipmc.com Purpose of Inspection: To determine compliance with the Clean Air Act and Michigan Department of Environment, Great Lakes, and Energy (EGLE) Permit-to-Install Facility Type: Hot Mix Asphalt Plant Regulations Central to Inspection: EGLE Permit-to-Install Facility Name: Michigan Paving & Materials Co. Facility Location: 16777 Wood Rd, Lansing, Michigan Date of Inspection: May 16, 2024 Arrival Time: 10:30 AM Departure Time: 12:49 PM Inspection Type: Unannounced Inspection Announced Inspection OPENING CONFERENCE Presented Credentials Stated authority and purpose of inspection Provided Small Business Resource Information Sheet: Provided via email post-inspection Small Business Resource Information Sheet not provided. Reason: Provided CBI warning to facility The following information was obtained verbally from Michigan Paving & Materials, Co. (MPM) unless otherwise noted. Process Description: MPM is an asphalt manufacturing site that is permitted to operate 24/7, but typically operates 8-10 hours each day with approximately 20 employees. Raw materials include gravel, sand, liquid asphalt, and recycled asphalt millings. Sand, gravel, and recycled asphalt millings are brought in by trucks and stored in piles in the facility yard. Liquid asphalt and cement are stored in tanks. There is a line of feed hoppers that hold aggregates separated by particle size and property. The amount of each aggregate is variable in each mix, and dependent on the use that type of asphalt is made for. Feed hoppers run at a fixed rate, depending on how much of each aggregate is needed. Shakers and screen decks are used to screen-out larger pieces that are not meant to go into the mix. The aggregate for the mix is brought by belt to a drum where it is dried. The dry aggregate travels down the drum and liquid asphalt is injected. A bucket elevator carries the hot mix asphalt (HMA) to a drag conveyor and then to a silo for storage. At each silo, there is a blue smoke control unit at each silo to control PM and "haze" from silo filling. There are 10 silos, each with a capacity of 300 tons of HMA. There is a knockout box that leads to a baghouse where the pressure drop is monitored daily. If the pressure drop is out of range, production is slowed until it is brought back between 2 and 8" WC. A black light test, where black light powder is injected, is done at the baghouse annually to check bag efficiency. MPM has a fugitive dust plan where gravel roads are sprayed with chloride 2-3 times a year and paved roads are swept 1-2 times a week. Staff Interview: Production has been steady for the last five years. MPM operates under a throughput limit in their permit. MPM tracks their emissions in their internal air log that are based on tons of HMA produced. Facility Name: Michigan Paving & Materials Co. Facility Location: 16777 Wood Rd, Lansing, Michigan Date of Inspection: May 16, 2024 Emission factors are either from EGLE, AP-42 Vol. 1: Section 11.1 Hot Mix Asphalt Plant, and/or a stack test conducted in 2007. TOUR INFORMATION EPA Toured the Facility: Yes Data Collected and Observations: EPA observed the stockpiles and feed hoppers first. Then observed the aggregates mixed transferred into the drum to be dried. EPA observed the baghouse, baghouse stack, and liquid asphalt tanks. EPA went into the control room and read the pressure drop at the baghouse to be 3.4" WC. Photos and/or Videos: were taken during the inspection and are listed in Appendix A. Field Measurements: were not taken during this inspection. RECORDS REVIEW 1. Asphalt Process Diagram 2. AP-42 Vol. 1: Section 11.1 Hot Mix Asphalt Plant CLOSING CONFERENCE Provided U.S. EPA point of contact to the facility Requested documents: Internal Air Log from January 2021-Present 2007 Stack test Annual Emissions Reports from 2021-Present Baghouse design and capacity Original permit application for the baghouse DIGITAL SIGNATURES BRIANNA Digitally signed by BRIANNA FENZL Report Author: ____F__E_N_Z__L_______2_0:2_9_:03_-_05_'0_0' _________ Date: 2024.07.15 Section Supervisor: NATHAN Digitally signed by NATHAN FRANK FRANK Date: 2024.07.15 22:29:53 -05'00' __________________________________ Facility Name: Michigan Paving & Materials Co. Facility Location: 16777 Wood Rd, Lansing, Michigan Date of Inspection: May 16, 2024 APPENDICES 1. Appendix A: Digital Image Log and Digital Video Log Facility Name: Michigan Paving & Materials Co. Facility Location: 16777 Wood Rd, Lansing, Michigan Date of Inspection: May 16, 2024 APPENDIX A: DIGITAL IMAGE LOG AND DIGITAL VIDEO LOG Inspector Name: Aileen Drum Archival Record Location: AECAB Library > Enf_MichiganPavingSpartanAsphalt_MI_24 > Enf_MichiganPavingSpartanAsphalt_MI_24_Inspection > Photos Image Number File Name Date and Time (incl. Description of Image Time zone and DST) P5160003.JPG 5/16/24 MPM Plant 1 12:15 PM CST P5160004.JPG 5/16/24 MPM Plant, duplicate 2 12:15 PM CST P5160005.JPG 5/16/24 HMA storage silos and baghouse 3 12:34 PM CST stack P5160006.JPG 5/16/24 HMA storage silos, baghouse 4 12:36 PM CST stack, and liquid asphalt tanks