Document 5LZObBKp55R59gd6GYjQMJMkN

EPA REGION 10 Enforcement and Compliance Assurance Division INSPECTION REPORT Inspection Entry Date/Time Inspection Exit Date/Time Weather Media Statute(s)/Program(s) Type of Inspection 12/18/2024 08:28 AM (PT) Announced: No 12/18/2024 11:45 AM (PT) Access: Granted 50F, Overcast Water Clean Water Act, NPDES, Stormwater - Industrial Compliance Evaluation Inspection Permittee Name Site Name Site Physical Address City, State, Zip Code County Facility GPS Coordinates Mailing Address City, State, Zip Code Granite Excavation Kuna Mora Pit aka Blacks Creek Pit East Kuna Mora Road Kuna, Idaho 83634 Ada 43.468100, -116.166400 23 Warm Lake Highway Cascade, Idaho 83611 FRS ID Permit Number SIC IDT7827185999 IDR05J10R 1442 (Construction sand & gravel mining) Lead Inspector: RAYMOND ANDREWS Date: 2025.02.10 09:14:09 -08'00' Digitally signed by RAYMOND ANDREWS Raymond Andrews EPA Region 10 andrews.raymond@epa.gov (206) 553-4252 Supervisor Review: Contreras, Peter Peter Contreras EPA Region 10 Digitally signed by Contreras, Peter Date: 2025.02.10 12:15:14 -08'00' contreras.peter@epa.gov (206) 553-6708 Granite Excavation Permit # IDR05J10R SECTION I - Opening Conference I arrived at the Granite Excavation site ("Site"), located at East Kuna Mora Road, Kuna, Idaho, at 8:28 AM on 12/18/2024 for an unannounced inspection. I presented my credentials to Jack Nygaard, Syman Consultant, and informed him I was there to conduct an inspection to determine compliance with the Clean Water Act (CWA) and the site's National Pollutant Discharge Elimination System (NPDES) Multi-Sector General Permit (MSGP) For Stormwater Discharges Associated with Industrial Activity, permit # IDR05J10R. This report is based on information supplied by Mr. Jack Nygaard, my direct observations, and records and reports maintained by the permittee. In addition, information gathered prior to or after the Inspection from a review of EPA, State, and/or public records may be included in this report. Granite Excavation shares the site with Lurre Construction (IDR05J10O) and they use the same consultant, Syman Company, to manage stormwater. Granite Excavation operates from the upper portion of the Site. Syman specializes in providing stormwater compliance solutions for various industries and produced a single Stormwater Pollution Prevention Plan (SWPPP) for the site which encompasses both Granite's and Lurre's activities. In addition to writing the site's SWPPP, Syman maintains the Best Management Practices (BMPs), conducts routine site inspections, and conducts sampling. Attendees Organization Attendee Name Title Present in Present in Opening Conf. Closing Conf. EPA Region 10 Raymond Andrews Lead Inspector Yes Yes Syman Erosion & Jack Nygaard MSGP Project Yes Yes Sediment Control Manager Granite Excavation Michelle Valona SWPPP Inspector Yes Yes Site Information Responsible Official? Dusty Hibbard, Vice President; Michelle Brewer, SWPPP Inspector Type of Operation Mineral Mining and Processing Is property owned? The property is leased from the Idaho Department of Land. Size of Site? The total size of the site is approximately 110 acres. Years in Operation? Granite Excavation started operations around February 1, 2023. Number of Employees? The site has three to five employees. Hours/Days of Operations? The site is operational 7AM - 5 PM, Monday through Friday. Some weekends are worked during peak construction season. Industrial activities exposed to stormwater? The site excavates raw material, crushes it, then sorts and loads it for shipping. Type of materials Construction aggregates, loaders, bulldozers, excavators, dump trucks, and/or vehicles stored crushers, and power sorters are all stored outside. outdoors? Number of Outfalls? The site has two outfalls, Outfall 001 and Outfall 002. The site does not have any inlets or drains. Sampling locations? The site's discharges are sampled at Outfall 001 and Outfall 002. 2 of 5 Granite Excavation Permit # IDR05J10R Personnel conducting Jack Nygaard, the Syman Consultant, conducts inspections and sampling. inspections/sampling? How often does the Mr. Nygaard conducts quarterly sampling. site conduct sampling? Does the site analyze water samples inhouse? All water samples are analyzed by a contract lab. What is the contract lab's contact information? Analytical Laboratories, Inc. 1804 N 33 Road Boise, Idaho 83703 (208) 342-5515 Receiving Water? The receiving water is Tenmile Creek which is a 3rd order stream below Blacks Creek Reservoir. Describe stormwater's Stormwater flows downslope, from north to south in the southern portion of flow path across the the property. It flows from south to north at the northern portion of the site. property. BMPs/Stormwater Treatment? The facility uses available topsoil from clearing and grubbing to create topsoil berms at the facility's limits of disturbance to prevent stormwater discharges from leaving the facility. Overburden is stockpiled on the south end of the project limits, since the southern portion of the site receives heavy stormwater flows from up slope. The subgrade material is very porous, and stormwater infiltrates into the ground or evaporates. Other BMPs include secondary containments for fuel storage, which are double walled tanks. SECTION II - Observations No observations were made that constitute an Area of Concern. SECTION III - Records Review Records may not be in sequential order. Record: SWPPP Ref #: RA1-RR-006 Reviewed By: Raymond Andrews AOC: Yes Reviewed Date: 01/24/2025 Post inspection, I reviewed the Site's Stormwater Pollution Prevention Plan (SWPPP) with a preparation date of July 7, 2022. Syman, LLC is the consultant that created the SWPPP. Syman also does all the inspections and sampling required by the permit. Syman is the consultant for both Lurre Construction (IDR05J10O) and Granite Excavation (IDR05J10R) which share the site. Since it is a single site, Syman prepared one SWPPP that covers activities of each entity on the site. The SWPPP has entries specific to each operational entity as it applies, but a majority of the SWPPP addresses the site as a whole. The only areas of concern I found with the SWPPP are missing elements of the Site Map. The SWPPP map is required to use arrows to show the direction of stormwater flow. While the map does have arrows, there is nothing on the map, or in the Legend, explaining what the arrows represent. The Site Map showed the location of the two outfalls on the site, but it did not show the location of the sampling points. If the outfalls are the sampling points, the map should indicate that is the case. 3 of 5 Record: DMR Reports Ref #: RA1-RR-005 Reviewed By: Raymond Andrews Granite Excavation Permit # IDR05J10R AOC: No Reviewed Date: 01/24/2025 Post inspection, I reviewed Discharge Monitoring Reports (DMRs) from 4Q 2023 through 3Q 2024. I did not note any areas of concern. Record: Other - Site Routine Inspection Reports AOC: No Ref #: RA1-RR-004 Reviewed By: Raymond Andrews Reviewed Date: 01/24/2025 Post inspection, I reviewed the Site's Routine Inspection Reports from 1Q 2023 through 4Q 2024. I did not note any areas of concern. Record: Other - Site Annual Reports AOC: No Ref #: RA1-RR-003 Reviewed By: Raymond Andrews Reviewed Date: 12/13/2024 Post inspection, I reviewed two of the Site's Annual Reports. The Site became active in 4Q 2022. I reviewed Annual Reports for reporting years 2022 and 2023. I did not note any areas of concern. Record: Notice of Intent AOC: No Ref #: RA1-RR-002 Reviewed By: Raymond Andrews Reviewed Date: 12/13/2024 Prior to the inspection, I reviewed the site's Notice of Intent (NOI) to discharge, dated September 22, 2022. I did not note any areas of concern. Record: Other - ICIS Benchmark Report AOC: No Ref #: RA1-RR-001 Reviewed By: Raymond Andrews Reviewed Date: 12/13/2024 Prior to the inspection, I reviewed a benchmark report generated from EPA's Integrated Compliance Information System (ISCIS) database. The report was provided by Jason Rodrigues and retrieved from the database on December 11, 2024. The report covered the four quarters of 2024. The report showed the site did not report any benchmark exceedances for the year. SECTION IV - Sampling Activities No sampling was conducted. SECTION V - Areas of Concern Areas of Concern may not be in sequential order. The presentation of Area(s) of Concern does not constitute a formal compliance determination or violation. AOC Reference #: RA1-RR-006 Records Review: SWPPP Permit Requirement Part 6.2.2.3 of the Permit states the SWPPP must provide a map showing, in part, "c. Directions of stormwater flow (use arrows), including flows with a significant potential to cause soil erosion...i. Locations of all stormwater monitoring points..." AOC: There is nothing on the map explaining what the arrows represent. The Site Map did not show the location of the sampling points. SECTION VI - Closing Conference I held a closing conference with Site personnel at 11:45 AM (PT) on 12/18/2024 for the inspection. During the closing conference, I discussed my observations and Areas of Concern identified during the inspection. Observations and Areas of Concern have not yet been evaluated for a formal compliance determination. 4 of 5 SECTION VII - List of Appendices 1. Photo Log Granite Excavation Permit # IDR05J10R 5 of 5 APPENDIX 1: Photo Log Berm IMG-202412180941444144138914.jpg 12/18/2024 09:41 AM No CBI No PII Photographer: Raymond Andrews 43.46518186, -116.16541577 Active Site Perimeter Berm, Vegetated Buffer Zone, and Bark Wattle Delineating the Outer Boundary of the Site. Berm IMG-202412180941474147130497.jpg 12/18/2024 09:41 AM No CBI No PII Photographer: Raymond Andrews 43.46518186, -116.16541577 Active Site Perimeter Berm along Access Road, photo 1 Berm IMG-202412180941514151135534.jpg 12/18/2024 09:41 AM No CBI No PII Photographer: Raymond Andrews 43.46518064, -116.16541726 Active Site Perimeter Berm along Access Road, photo 2 Conveyor 12/18/2024 09:43 AM (MT) No CBI 43.46518064, -116.16541726 Conveyor piling sand No PII IMG-20241218094312431287636.jpg Photographer: Raymond Andrews Upper Site 12/18/2024 09:46 AM No CBI 43.46568059, -116.16733332 Site bounded by Hills, photo 1 No PII IMG-20241218094642464293212.jpg Photographer: Raymond Andrews Upper Site 12/18/2024 09:46 AM No CBI 43.46568059, -116.16733332 Site bounded by Hills, photo 2 No PII IMG-20241218094651465193241.jpg Photographer: Raymond Andrews Upper Site 12/18/2024 09:46 AM No CBI 43.46568059, -116.16733332 Site bounded by Hills, photo 3 No PII IMG-20241218094658465897554.jpg Photographer: Raymond Andrews Bark Wattle Perimeter Outer Site Boundary 12/18/2024 09:54 AM No CBI No PII 43.46568059, -116.16733332 Bark wattle acting as limit of active site, photo 1 IMG-202412180954485448148815.jpg Photographer: Raymond Andrews Outer Site Boundary 12/18/2024 09:54 AM No CBI No PII 43.46568059, -116.16733332 Bark wattle acting as limit of active site, photo 2 IMG-202412180954505450137977.jpg Photographer: Raymond Andrews Outer Site Boundary IMG-202412180956455645101834.jpg 12/18/2024 09:56 AM No CBI No PII Photographer: Raymond Andrews 43.46568059, -116.16733332 Active Site Perimeter Berm along Access Road, photo 3 Site Entrance Sign 12/18/2024 10:08 AM No CBI No PII 43.46568059, -116.16733332 Site Entrance Sign with SWPPP, Photo 1 IMG-2024121810081381383215.jpg Photographer: Raymond Andrews Site Entrance Sign 12/18/2024 10:08 AM No CBI No PII 43.46568059, -116.16733332 Site Entrance Sign with SWPPP, Photo 2 IMG-2024121810083883866724.jpg Photographer: Raymond Andrews