Document 9JnLZNjE1QjxgBdORg77G7pV

U.S. Environmental Protection Agency, Region 4 61 Forsyth Street SW, Atlanta, GA 30303 Water Compliance Inspection Report FACILITY DATA NPDES ID: SCR005480 Effective Date: 07/01/2022 Expiration Date: 06/30/2027 Facility Name: Concrete Supply Company (CSC) - Greer SIC Code: 3273 Address: 1401 Hwy 101 / Greer, SC 29651 On-Site Representative: Marion Brown, Plant Manager Highway101@concretesupplyco.com 864-605-9800 Wayne Amaker, Operations Manager Wayne.Amaker@ConcreteSupplyCo.com 704-617-4329 Responsible Official: Johnie Alexander Environmental Manager JOHNIE.ALEXANDER@CONCRETESUPPLYCO.COM 704-372-2930 INSPECTION ENTRY DATES/TIMES Entry Date/Time: 10:15am 11/21/2024 Exit Date/Time: 12:10pm 11/21/2024 NAMES OF STATE INSPECTORS N/A AREAS EVALUATED DURING INSPECTION (Check those areas evaluated) X Permit X Records X Facility Site Review X Effluent/ Receiving Waters Flow Measurement Self-Compliance Program Compliance Schedule Laboratory X Operations & Maintenance Sludge Handling/ Disposal INSPECTION SUMMARY Pretreatment X Pollution Prevention X Storm Water Combined Sewer Overflow Sanitary Sewer Overflow This was a stormwater Compliance Stormwater Evaluation Inspection (CEI) focusing on the requirements of the South Carolina General Permit for Storm Water Discharges Associated with Industrial Activities. INSPECTOR SIGNATURE CELINA RUSSO Digitally signed by CELINA RUSSO Date: 2025.01.16 09:54:51 -05'00' Celina Russo, Environmental Engineer JEREMY JUDD Digitally signed by JEREMY JUDD Date: 2025.01.16 15:19:42 -05'00' Jeremy Judd, Environmental Engineer AHMAD Digitally signed by AHMAD DROMGOOLE DROMGOOLE 08:15:53 -05'00' Date: 2025.01.17 Ahmad Dromgoole, Section Chief Waterways and Wetlands Enforcement Section Page 1 of 6 OFFICE/PHONE NUMBER USEPA Region 4/ECAD-WEB-WWES 404-562-9804 USEPA Region 4/ECAD-WEB-WWES 404-562-9505 USEPA Region 4/ECAD-WEB-WWES 404-562-9212 NPDES Industrial Stormwater Worksheet (SC) GPS Coordinates Receiving Water(s) or MS4 Site Acreage 1. FACILITY LOCATION INFORMATION Latitude 34.902 N Tributary to Abner Creek ~7 acres SIC Code Longitude Discharge to 303(d) or TMDL waters 3272 (Sector E2) -82.170 W No Weather Condition Email on NOI Johnie.Alexander@c Date of NOI oncretesupplyco.com 08/08/2022 Sunny, cool 2. STORMWATER POLLUTION PREVENTION PLAN (SWPPP) AND SUPPORTING DOCUMENTS PLAN TOPICS - Section 5 of Permit YES NO N/E SWPPP available on-site See photo DSCN3146 for SWPPP title page info. Part 5.3 X SWPPP Certification Signature/Date Part 5.1.6 Certification page was signed by Henry Batten, President, and Johnie Alexander, Environmental X Manager, in July 2024. SWPPP modified and updated to current conditions Part 5.2 Date of last amendment was 07/2024. Previous amendments were made in July 2020, March 2020, X January 2020, and March 2010. Pollution Prevention Team named in SWPPP Part 5.1.1 Environmental manager, district/area manager, and plant manager. Bullet point list of responsibilities X for each. SWPPP Appendix includes individual's names and contact info. Site Description Part 5.1.2 Facility is a concrete batch plant. Cement and fly ash are stored in silos. Admixture tanks are in a X secondary containment unit and the diesel AST is double walled and located in a dike. Sediment is controlled by the riser pipe in the pond. Site Map See photo DSCN3149. Part 5.1.2.c X Summary of potential pollutant sources / particular pollutants Part 5.1.3 Identifies various sources and their associated pollutants, which include TSS, pH, and O&G. X Description of the Control Measures Part 5.1.4 See for example photo DSCN3147-3148. Additional identified control measures include the recycle pit system and truck wash area with drying bed. All process water goes to sump at last pit to pump to X either the plant or for truck wash. Berms are used to minimize exposure. Page 2 of 6 SCHEDULE & PROCEDURES FOR: Good Housekeeping Part 5.1.5.1.a.i Includes weekly sweep checks (weekly sweeping of yard/paved areas and checking the dust X collector), cleaning the catch basin at 2/3 sump depth, and quarterly baghouse checks Preventative Maintenance Includes inspection of spill control materials and performing quarterly inspections Part 5.1.5.1.a.ii X Spill Prevention and Response Section 11 of the SWPPP; Also in SPCC; schedule = immediately Part 5.1.5.1.a.iii X Employee training Part 5.1.5.1.a.iv / 2.1.2.9 X To be completed annually for both spills and general awareness of SWPPP topics Benchmark Monitoring Part 5.1.5.2 / 6.1.7 Includes 15-minute holding time for reading pH. SWPPP also contained a section on impaired waters X monitoring and SC DES water quality reports for receiving waters. Schedule & Procedures for ROUTINE Inspections Part 5.1.5.2.e Routine inspections are to be done quarterly, which is consistent with permit requirements X Schedule & Procedures for QUARTERLY VISUAL Inspections Part 4.2.1 Quarterly visual assessments of discharge are to be done once each calendar quarter and the X sample shall be collected within 30 minutes of discharge. Schedule & Procedures for ANNUAL COMPREHENSIVE Inspections Shall be completed annually, which is consistent with permit requirements. Part 4.3.1 X Ready-Mix Certification Part 8.E.3 A non-stormwater discharge assessment and certification log was completed annually from 2015 through 07/2023. X 3. SITE DESCRIPTION AND SWPPP Facility is a ready-mix concrete batch plant. Facility maintains a weir system shown in photo DSCN3172 as well as a twopond retention system on the eastern side of the property. Facility has two permitted outfalls. Outfall #1 is the outlet of the second/lower pond, which is shown in photo DSCN3156. Outfall #2 discharges runoff from the northern portion of the site into the roadside drainage ditch along Old Woodruff Road. RECORD REVIEW Representative on-site NOI Submitted to DES 4. RECORD REVIEW Records available onsite or "readily available" a. Most recent NOI b. Acknowledgement letter from SC c. Permit Records of incidents with spills, leaks, pollutant releases Including: dates and description of incident and the corrective actions Page 3 of 6 YES NO N/E X Part 5.4 X Part 5.4 X Part 5.4.d X A log is completed annually for 2021 through 2024. Facility reports no significant spills. Records of employee training Part 5.4.e Training material, which included both SWPPP and SPCC information, was included as well. X Rosters with employee signatures for training 10/7/2024, 06/17/2024, 02/09/2023, and 10/12/2022. Records of ROUTINE quarterly inspections Records from present back through 2020 were retained onsite. Part 5.4.f X Records of QUARTERLY VISUAL Assessments (Collected in first 30 min of discharge; 0.1-inch storm; 72 hrs min from last rain) Part 5.4.f 06/01/2023 - reported no discharge for Outfall #1; assessment completed for Outfall #2 on 06/21/23. A benchmark sample for Outfall #2 was also collected on this date. 11/06/2023 - reported no discharge for Outfalls #1 and 2 X 01/29/2024 - reported no discharge for Outfalls #1 and 2 06/10/2024 - reported no discharge for Outfalls #1 and 2 Permit 4.2.1 states that, once each quarter for the entire permit term, permittees must collect a stormwater sample from each outfall and conduct a visual assessment. Records of ANNUAL Comprehensive inspections Part 5.4.f Completed on 07/05/2023, 05/2022, and dating back through 2019. Reports were all signed and certified. See for example photo DSCN3150, which shows the first page of the 2023 inspection X report. Annual comprehensive inspections are done by the Environmental Manager. Records of Benchmark Sampling Part 5.4/6 Dating back through 2020. Sampling data forms with pH calibration were also included. The sampling log for 11/21/2023 reported no flow through either outfall following a 0.5-inch rain event. Permit Part 6.1.6 states that the permittee must monitor on a quarterly basis at least once in each X calendar quarter (January 1 - March 31; April 1 - June 30; July 1 - September 30; and October 1 - December 31). Permit Part 6 defines monitoring as the collection and analysis of a stormwater sample during a measurable storm event. Documentation of any corrective actions (including triggering event) Part 5.4.h A corrective action list, generated from the 2019 and 2020 annual comprehensive inspections, X tracked on which dates the necessary corrective actions, identified during the inspection, were completed. 5. FIELD EVALUATION & PLAN IMPLEMENTATION Pollutant Sources Loading/Unloading Area Note location, quantitative description, design issue, O&M deficiencies, and pollutants offsite Everything enters and leaves via truck. After filling at the batch plant (at the location shown in photo DSCN3173), concrete trucks drive past the front entrance and exit at the back of the site (at the driveway by Outfall #2). Outdoor Storage Concrete forms are used for excess concrete. Blocks are either sold or used onsite if needed. The block storage area is shown in photo DSCN3151. Aggregate is stored in three-sided bins in the yard. Cement and fly ash are stored in silos at the plant. Page 4 of 6 Outdoor Manufacturing/ Processing Operations A front-end loader loads aggregate into the hopper. Trucks are loaded at the batch plant at the location shown in photo DSCN3173. Concrete is mixed in the truck drums. Treatment/Waste Storage/Disposal Areas Returned concrete is dumped at the catchment shown in photo DSCN3164, which also receives runoff from the slump rack/truck wash station (photos DSCN3171 and DSCN3166). This catchment drains into the weir system (photo DSCN3165 and photo DSCN3172). Water from this weir system is recycled into concrete when the mix specifications allow for it. Slurry/solids from the truck wash catchment are removed as needed to maintain storage capacity and brought to the drying pad (photo DSCN3163). Solids are cleaned out and placed in the rubble pile (photo DSCN3162). The concrete rubble is picked up and hauled offsite. Facility has a series of two retention ponds at Outfall #1. The first/upper pond is shown in photo DSCN3155. There are two gravel berms at the pond's entrance (photo DSCN3154). A sump pumps water from this pond for reuse as shown in photo DSCN3161. Water from the first pond discharges to the second pond either via the riser pipe or the rock-lined overflow spillway in photo DSCN3160. An overview of the second pond is shown in photo DSCN3156. This pond discharges via the pipes in photo DSCN3159, which discharge to Outfall #1 (photo DSCN3157) and continuing in the direction shown in photo DSCN3158. Sediment & Erosion Controls (BMPs) Haybales were installed at Outfall #2 (photo DSCN3170). Haybales were in good condition during the inspection. A rock berm was in place at the entrance of the upper pond (photo DSCN3154). The auxiliary spillway of the upper pond was lined with rock (photo DSCN3160). Facility sweeps weekly and fills out a weekly sweeping log in the SWPPP. Spills / Leaks Handling / Good Housekeeping Facility maintains a 10,000-gallon double-walled AST for diesel fuel (photo DSCN3152; spill kit materials are kept in the red buckets). No vehicle maintenance is done onsite. A tote of DEF was located near the truck wash area. Buckets of form release (see photo DSCN3131) were closed but stored outside. Steel fibers were stored next to the diesel fuel tank. The packaging was opened, and the steel fibers were exposed to rainwater (see also photo DSCN3152). An empty drum was located behind the aggregate bins. Facility personnel indicated that it would be moved/disposed of by the end of the day. Admixtures are stored outside as shown in photo DSCN3174. The secondary containment unit was not holding water. Facility personnel stated that the containment unit is released via the valve only if there is no sheen in the held water. Facility conducts weekly sweeping and maintains a log in the SWPPP. A wet sweep is done once per month. Page 5 of 6 6. OUTFALL, STORMWATER DISCHARGE & RECEIVING WATER OBSERVATIONS OUTFALL, STORMWATER, DISCHARGE, & RECEIVING WATER Number & location of stormwater discharge(s)/outfall(s) consistent with SWP3 YES NO DESCRIPTION SWPPP identifies two outfalls (photos DSCN and DSCN, respectively). The drainage area for Outfall #1 includes the batch X plant/silos, truck wash area, and oils fuels. Outfall #1 is the outlet of the second pond. Outfall #2's drainage area, located near the rear entrance, includes the driveway and raw material storage area. Evidence of off-site accumulation of pollutants observed in receiving water X None observed. Non-stormwater discharge observed X None observed. Exit interview conducted with: Mr. Wayne Amaker Preliminary findings discussed during the exit interview included: - Empty drum behind the aggregate storage area should be properly disposed. - Buckets of form release were stored outdoors. - Report will be sent via email in ~60 days Photo Log is attached. Page 6 of 6