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Home My WebLink AboutNCG030130_Tier Response_20200129Zahid Khan, Regional Engineer - Mooresville Regional Office Energy, Mineral, and Land Resources NC Department of Environmental Quality 610 East Center Avenue, Suite 301 Mooresville, NC 28115 Subject: Daimler Trucks North America — Gastonia Facility Relief Request for Stormwater Outfall 001- COC NCG030130 Shield Project No. 1140099-08 Dear Mr. Khan, Daimler Trucks North America — Gastonia (the facility) maintains coverage under General Permit No. NCG030000 to discharge stormwater under the National Pollutant Discharge Elimination System for facilities primarily engaged in Metal Fabrication, effective November 1, 2018 (the General Permit) through Certificate of Coverage NCG030130. Monitoring results at Outfall 001 have triggered monthly monitoring for exceedances of the Copper and pH benchmarks. These exceedances obligated the facility to follow the Tier 2 and Tier 3 response outlined in Part II, Section B of the General Permit. As part of the tiered response, Shield has been working with the facility to achieve benchmarks at Outfall 001. Since May of 2014, the facility initiated the following response actions in an effort to achieve benchmark concentrations for Copper: • Construction of a cover shed area for scrap metal roll -off containers. Installed concrete pads for empty roll -off containers, empty totes, and covered wastewater sludge roll -off container area. • Construction of a new roadway connecting Fairview Road to facility on the northwest corner of the property that included additional erosion control system along the new roadway. • Increased sweeping frequency (2 times a week) of all parking and paved surfaces. • Implemented monthly stormwater inspections of roll -off containers. • Instituted area 5S map of outside materials storage areas with shared responsibilities between all 3 shifts. • Implemented vendor inspection of roil -off containers, with agreement for vendor repair prior to leaving the facility. • Implemented the use of a microbial floor cleaner (for use on oily spills and leaks from truck traffic and forklifts) that turns hydrocarbons into carbon dioxide and water. • Portions of the facility's ballast stone roof have been replaced with new vinyl material. DTNA — Gastonia Facility Relief Request for Stormwater Outfall 001 - COC NCG030130 January 23, 2020 Shield Project No. 1140099-08 Page 2 These activities are in addition to the facility's ongoing use of other best management practices: • Use and maintenance of retention ponds; • Use of natural filtration and vegetation where available; • Installation and maintenance of rip -rap lined channels; • Containment dikes for bulk storage and loading/unloading areas; • Double walled bulk storage tanks; • Controlled air emissions; and • Preventative actions such as maintenance, inspections, employee education, limiting outdoor manufacturing operations, installation of drain barriers/inlet protection in high risk areas, construction material review, and vendor inspection of roll -off containers. As shown in the attached charts, these comprehensive response actions, along with the change in benchmark concentrations in the November 2018 General Permit, have collectively led the facility closer to meeting the benchmarks. Monitoring since January 2019 (Period 1 of the November 2018 General Permit) has shown only two (2) benchmark exceedances at Outfall 001: • seasonal pH, August 2019 (pH = 9.3) • copper, June 2019 (Cu = 0.012 mg/L) On behalf of the Gastonia facility, Shield is requesting regulatory relief under Part II, Section B of the General Permit for the Gastonia facility for the remainder of the General Permit term. Specifically, the Gastonia facility requests a release from the continued monthly monitoring and response actions under Tiers 2 and 3 for Copper and pH at Outfall 001. We look forward to hearing from you and moving this relief request forward. Sincerely, SHIELD ENGINEERING, INC. Melinda M. Greene Senior Engineer ATTACHMENTS cc: James Moore, Assistant Regional Engineer Robert L. Griffin, P President/CEO � ■ � , � : � * * . _ . « z . z � 2 � ■ � - , ; � , * . ■ ' ■ . � ■ . _ _ ® ■ _ . ■ ■ � . �■ � � . � . : . . « - . : . . ® _ ® # , � + ?. � # \ 9 . � z w ; � - ; � _ � -. ■ » ■ y ® � 2 ■ : - # # � _ � _ - • - � # - ■ _ � ■ _ � ■ _ � k - � _ • � � ■ � ■ . _ _ � . _ � � . _ � _ ' ' � ? � � ` � . : ~ � � % � Ems G 0 0 6r.1 aqW a,10 A/ nb 6r -.Ifa4 8r �aq� a�ON �r 4shsn b v� � a�ON b Discharge Characteristics to be Tested GASTONIA FACILITY Non -polar Oil Total & Grease / pH Suspended TPH EPA°pper, Total Recoverable Lead, Total Zinc, Total Total Toxic Solids (mg/L) Method 1664 (mg /L) Recoverable Recoverable Organics Sample Date Outfall (SGT-HEM) (mg/L) (mg/L) (mg/L) (TTO) (m L ) Annual 1st Period LIMIT SDO 6.9 300 15 0.007 0.030 (May 2013) 001 6 35 0.067 1 ►nnual end Period SDO <4.8 0.091 0.0015 0.049 NA* arember 2013) 001 8.6 198 <5.0 F 0.0262 0.0078 0.258 <0.05 NO FLOW 7.39 11.3 <5.0 0.0229 <0.005 0.0547 0,00041 NO FLOW NO FLOW NO FLOW NO FLOW NO FLOW NO FLOW NO FLOW 7.62 63.7 <5.0 0.0147 <0.005 0.0416 0.00018 NO FLOW piny cu.t4) �Q1 ' 2 9.33.3 <5.0 0.0294 Monthly (August $®O <0.005 0.0158 NA* 2014) 001 s.s 20.7 <5.0 0.018 <0.005 0.016 <0.0005 Monthly SDO (September 2014) 001 8.8 17.3 Monthly ' SDO <5.0 0.021 <0.005 0.015 <0.0005 (October, 2014) 001 NO FLOW Monthly SDO (November 2014) 001 74 8•2 Monthly SDO <5.0 <0.005 <0.005 0.126 <0.0005 (December 2014) 001 NO FLOW Monthly SDO (lanuary2015) 901 8.4 18.3 <5.0 0.015 <0.005 0.027 <0.0005 Non -polar Oil GASTONIA FACILITY Total & Grease / Copper, Total Lead, Total Zinc, Total Total Toxic pH Suspended TPH EPA Recoverable Recoverable Recoverable Organics Solids (mg/L) Method 1664 (mg/L) (mg/L) (mg/L) (TTO) (mg/L) (SGT-HEM) (mg/L) Sample Date Outfall LIMIT ' 6-9 100 15 0.007 0.030 0.067 1 Monthly SDO 6.9 81.6 <5.0 0.030 <0.005 0.072 <0.0005 (February 2015) ODZ Monthly (March SDO 8.2 4.6 <5.0 0.085 <0.005 0.057 <0.0005 2015) 001 Semi -Annual 1st "Period : SDO 8.4 9 <5.0 0.036 <0.005 0.035 <0.0005 (Apri12015j 60i NO FLOW 2015j ; 001 Monthly (June SDO 9.1 14.2 <5.0 0.0211 <0.005 0.026 <0.0005 2015j 001 `Monthly (July:: SDO NO FLOW 2015j 001 Monthly (August " SDI 9.4 28.0 <5.0 0.028 <0.005 0.029 <0.0005 8.4 16.0 <5.0 0.009 <0.005 0.031 <0.0005 (September 2015) 001 Monthly SDf3 8.5 18.4 <5.0 0.027 <0.005 0.024 <0.0005 (October 2015) 0 Monthly SDO 8.3 14.0 <5.0 0.016 <0.005 0.040 <0.0005 (November 2015) 001 Semi -Annual 26d Period - SDO . 8.6 16.0 <5.0 0.009 <0.005 0.027 <0.0005 (December 2015) 001 Monthly -Spo 8.1 32.0 <5.0 <0.005 <0.005 0.025 <0.0005 (January 2016) 001 Monthly ; - SDO� 8.3 37.7 <5.0 0.0147 <0.005 0.061 <0.0005 (February 2016) Qd1 No Qualifying Event Non -polar Oil GASTONIA FACILITY Total & Grease / Copper, Total Lead, Total Zinc, Total Total Toxic pH Suspended TPH EPA Recoverable Recoverable Recoverable Organics Solids (mg/L) Method 1664 (mg/L) (mg/L) (mg/L) (TTO) (mg/L) (SGT-HEM) (mg/L) Sample Date Outfall LIMIT 6-9 100 15 0.007 0.030 0.067 1 SDO Monthly, (May 2026) 8.5 15.5 2.7 0.0121 <0.005 0.0191 <0.4873 No Qualifying Event 9.1 46 <5.0 0.0141 <0.005 0.0268 <0.486 9.1 30.4 <5.0 0.0155 <0.005 0.0196 <0.0487 "' NO DISCHARGE 2016} 001 Monthly (December SDO 2016) Ott 7.2 20.7 <5.0 0.0121 <0.005 0.0282 <0.4873 Monthly: .. (January SDO No Qualifying Event 2017} 001 Monthly_ -(February S�Q 2017} = 8.6 24.3 <5.0 0.0066 <0.005 0.0208 <0.4873 001 Monthly „ (March - SDO No Qualifying Event 2017} 001 Monthly (April Suci 9.0 122 <5.0 0.0235 0.0081 0.0961 <0.4873 No Qualifying Event 2017} ' 001 _ 8.7 28 <5.0 0.011 <0.005 0.0111 <0.4873 Monthly SDO (September 2017) No Qualifying Event 001 Non -polar Oil GASTONIA FACILITY Total & Grease / Copper, Total Lead, Total Zinc, Total Total Toxic pH Suspended TPH EPA Recoverable Recoverable Recoverable Organics Solids (mg/L) Method 1664 (mg/L) (mg/L) (mg/L) (TTO) (mg/L) (SGT-HEM) (mg/L) Sample Date Outfall LIMIT 6-9 100 15 1 0.007 0.030 10.067 i Monthly (November SDO No Qualifying Event 2018) �� Monthly (December $DO 8.42 17 <1.5 0.0037 0.0005 0.036 0.21 2018) ' 001 Monthly (January SDO 8.91 14 1.5 0.0071 0.0016 0.036 <0.210 2019) >01 Monthly " (February SDOW 8.99 6 <5.0 0.0034 0.00044 0.024 <0.19704 2019) 001 Monthly (March SDO 8.22 33 <5.0 0.0055 0.00094 0.034 <0.79476 2019) OQ1 Monthly (April SOO, 8.6 18 1.8 0.010 0.0087 0.022 <0.20344 2019) $O Monthly (May 2019) " No Qualifying Event 001 Monthly (June 2019) 1 - 8.6 26 4.4 0.012 0.00077 0.036 <0.20364 001 SD_0 Monthly '(July 2019) ; - 8.7 24 <5.0 0.0085 0.00083 0.023 <0.76024 _ 001 • Monthly (August SDO 9.3 17 <5.0 0.0077 0.00031 0.0083 <0.19704 001 No Qualifying Event 7.12 16 <5.0 0.0068 0.0011 0.024 <0.198017 6.75 10 <5.4 0.0031 0.00049 0.021 <0.19704 6-9 100 15 0.010 0.075 1 0.126 1 Non -polar Oil & Grease / Total Copper, Total Lead, Total Zinc, Total Total Toxic pH Suspended TPH EPARecoverable Recoverable Recoverable Organics Solids (mg/L) Method 1664 (mg/L) (mg/L) (mg/L) (TTO) (mg/L) (SGT-HEM) (mg/L)