ICIS-AIR MN0000002705301255

TILLER CORP - MAPLE GROVE MINING & PROCESSING FACILITY, Maple Grove, MN: Clean Air Act compliance record, inspections, violations, penalties

OperatingOperating status
Synthetic minor sourceEmissions classification
No Violation IdentifiedCurrent violation status, as filed
3Compliance evaluations since January 1, 2017
0High-priority violations since January 1, 2017
0Formal enforcement actions since January 1, 2017

TILLER CORP - MAPLE GROVE MINING & PROCESSING FACILITY is on EPA’s ICIS-AIR register at 77TH AVE N, Maple Grove in Hennepin County, Minnesota: operating status operating, emissions classification synthetic minor source, current violation status “No Violation Identified”. Hennepin County is on EPA’s Green Book list of areas that do not meet a national air quality standard.

What stands out

The newest of the 9 events on file is a compliance evaluation dated September 22, 2025.
Its events on file run from June 14, 2018 through September 22, 2025.
All 3 of its compliance evaluations on file are full compliance evaluations.
The register holds 390 air-emissions sources in Hennepin County, Minnesota.

Every line is computed by formula from the record’s stored figures; nothing is estimated.

Identity

Facility as filed	TILLER CORP - MAPLE GROVE MINING & PROCESSING FACILITY
ICIS-AIR ID	MN0000002705301255
EPA facility registry ID	110070106671
Operating status	Operating
Emissions classification	Synthetic minor source
Current violation status (HPV field)	No Violation Identified
Address	77TH AVE N, Maple Grove, MN 55369
County	Hennepin County
In a nonattainment county	Yes (EPA Green Book)
Industry (NAICS)	Mining and quarrying (NAICS 2123)
EPA region	05

Programs and pollutants

The program, pollutant and Title V files are not loaded: what this page covers.

Compliance evaluations

3Evaluations since January 1, 2017
3Full compliance evaluations

Date	What EPA recorded	Agency	Programs
September 22, 2025	FCE On-Site	State	Federally-Enforceable State Operating Permit - Non Title V; 40 CFR Part 63 Area Sources; MACT Standards (40 CFR Part 63); New Source Performance Standards; New Source Review Permit Requirements
April 20, 2022	FCE On-Site	State	Federally-Enforceable State Operating Permit - Non Title V; 40 CFR Part 63 Area Sources; New Source Performance Standards; New Source Review Permit Requirements
August 15, 2019	FCE On-Site	State	Federally-Enforceable State Operating Permit - Non Title V; 40 CFR Part 63 Area Sources; New Source Performance Standards; New Source Review Permit Requirements

Violations

1Violation determinations since January 1, 2017
0Of them high-priority

What high-priority and federally reportable violations mean.

Date	What EPA recorded	Agency	Programs
August 15, 2019	Earliest FRV determination	State	State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards

Enforcement and penalties

0 of the formal enforcement actions carry a penalty filed above zero. How a penalty is shown.

Informal enforcement

Date	What EPA recorded	Agency
January 30, 2020	Warning Letter	State

Stack tests

4Stack tests since January 1, 2017
0Recorded as failed

Date	What EPA recorded	Agency
June 6, 2024	Pass	State
June 8, 2021	Pass	State
June 25, 2018	Pass	State
June 14, 2018	Pass	State

Watch TILLER CORP - MAPLE GROVE MINING & PROCESSING FACILITY

Privacy

Free from EPA: Detailed Facility Report, ECHO Notify (registry ID 110070106671).

Other air sources in Minnesota beside TILLER CORP - MAPLE GROVE MINING & PROCESSING FACILITY

EPA ICIS-AIR download, loaded September 14, 2026.