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HomeMy WebLinkAboutNC0090166_Fact Sheet_20230420 (2) NCDEQ/DWR/NPDES FACT SHEET - NPDES PERMIT DEVELOPMENT NEW NPDES Permit NCO090166 Joe R. Corporon, P.G., Expedited Permitting and Compliance Unit updated 20A r2023 Table 1 --Facility Information—Private Ownership Applicant/ CH MF BTH III / Charlotte LoSo LLC [LoSo] Facility Name Press Club Cleaners Brownfields Property Applicant Address 4509 Creedmoor Road,Raleigh Suite 308 28609 Applicant/ Sean Allen, LoSo Development Mgr. Facility Contact [sallen@TCR.com] 425-301-3806 Facility Address 3305 and 3309 South Boulevard,Charlotte Project Location Mecklenburg County Heart& Hickman,PC [H&H] Authorized 2923 South Tryon Street, Suite 100,Charlotte Consultant/ Haley Martin,P.G., Senior Project Geologist EAA Preparer Phone: 704- 526-2045. CELL: 704-506-8107 Email: Haley Martin [hmartin@harthickman.com] H&H concludes that a discharge to surface-water is the most viable discharge EAA Cost alternative because"...others [studied] are"not allowable or feasible." H&H Analyses presents no present value cost for alternatives judged"not feasible/allowable." EAA approved by DWR 09Mar2023. [see below, 6.01 Treatment CH MIT BTH III/Charlotte LoSo,LLC(Attn: Robert Brooks) Operator [rbrooks@tcr.com] Permitted Flow Permittee anticipates a flow rate a proposed discharge at flow rate of 0.075 GPD (MGD) (based on similar local discharges); groundwater recovery is limited by system components at— 100 gpm or 0.144 MGD. Type of Waste Treated Groundwater(excavation dewatering) WET testing Acute 48-hr,Monthly[TAA6C] -monitor only Facility Class Physical/Chemical PC/NC County Mecklenburg Facility Status NEW Regional Office MRO Stream Characteristics Receiving Stream UT to Little Hope Creek Stream C Classification Stream Segment 11-137-8-3 Drainage basin Catawba River Basin Summer 7Q10 — Subbasin 03-08-34 (cfs) Winter 7Q 10 (cfs) — Use Supporting No 30Q2 (cfs) — 303(d)Listed? Yes [2018]: DO; Fecal Coliform; Turbidity; copper Average Flow(cfs) — State Grid G15NE Instream Waste IWC= 100 Charlotte East Concentration [discharge to storm-sewer USGS Topo Quad (See site maps#1 and#2) (IWC) % inlet="zero-flow"conditions] Fact Sheet NEW NPDES Permit NCO090166 Press Club Cleaners-Brownfields Property,Charlotte Page 1 of 9 1.0 PROJECT DESCRIPTION Scope of Work: The Applicant anticipates that excavations installed during Site redevelopment (construction of multiple new storm water sewer lines)will intersect the groundwater table (see application cover letter). They propose to complete excavations within 30 days. They are applying for: • direct discharge to surface waters • a proposed discharge at flow rate of 0.075 GPD (base on similar local discharges) • groundwater recovery is limited by extraction-system components at approximately 100 gpm or 0.144 MGD. The permitted flow rate limit of 0.075 MGD, not to exceed, is based on moderating potential impacts to the receiving stream, and on potential groundwater recovery observed at similar local facilities. Treated effluent is approved to discharge to an existing stormsewer inlet by Charlotte- Mecklenburg Stormwater Services (letter dated June 6, 2022). This stormsewer inlet, hereby designated Outfall 001: • Outfall 001 — Storm sewer LAT/LONG= 35°, 11', 39.5"N/ 80°, 52', 05.4"W. • Effluent reaches Little Hope Creek, LAT/LONG= 35°, 1 l' 32.8"N/ 80°, 51', 57.0"W. 2,0 TREATMENT SYSTEM • equalization tank[—6, 900-gallon] • bag filter unit [rated @ 100 gpm] • three (3) each GAC filter with sample ports [reactivated liquid phase, 55- gal drum]. effective time contact range for VOCs= 10 to 15 min • they propose to dispose VOC-saturated filters (offsite)on a weekly basis. 2.0 BACKGROUND Brownfields Project: The facility was previously occupied by a dry cleaner from at least the late 1960s until the mid- 2010s. Historical, dry-cleaning operations resulted in environmental media impacts, and the Site is currently managed under the purview of the North Carolina Department of Environmental Quality(DEQ),Dry-Cleaning Solvent Cleanup Act DSCA Program (ID DC600090). The Applicant is purchasing the Site, having anticipated a closing date of 14Sep2022 (past due). They plan to redevelop the Site by constructing a multi-story residential apartment building. They have elected to enter the Site into the DEQ Brownfields Program to address environmental issues (Brownfields Project Number 25101-21-060). 3.0 RECEIVING-STREAM EVALUATION Little Hope Creek is a tributary of Little Sugar Creek. By association, these are currently classified C waterbodies located within the Catawba River Basin. Little Sugar Creek is listed by the Division as impaired[2018 North Carolina 303 (d) List]. Total maximum daily loads (TMDLs) for Little Sugar Creek have been developed for dissolved oxygen(approved February 1996), fecal coliform (approved March 2002), and Turbidity approved February 2005). Fact Sheet NEW NPDES Permit NCO090166 Press Club Cleaners-Brownfields Property,Charlotte Page 2 of 9 Established total maximum daily loads (TMDLs) include: • Fecal Coliform • Turbidity limit [< 50 NTU]. • Dissolved Oxygen [daily average not< 5 mg/L; instantaneous value not<4 mg/L during 7Q10 stream-flow conditions. • The EAA evaluated surface-waters for potentially impacted species identifying impaired waters 6.5 miles downstream. They conclude that there would be no impact. • The EAA evaluated surface-waters for potentially impacted species identifying impaired waters 6.5 miles downstream. They conclude that there would be no impact. In accord with statewide NPDES permitting guidance, any discharge to a storm-sewer inlet is deemed zero flow [7Q10 and 30Q2 =0.0 cfs] and therefore may afford no dilution to the effluent [15A NCAC 0213.0206 (d)]. 4.0 DWR EVALUATION of PROPOSED DISCHARGE Contaminants of Concern (COCs). The Division considered lists of COCs summarized in the EPA application as site-assessment data"believed to be present," and in Table 1, Summary of Groundwater Analytical Data]. Samples for analysis were collected from groundwater monitoring wells MW-I, MW-2, MW-3, MW-4 (see APP Site Map Figure 2). Considering additional analytes "believed to be present,"DWR has added Monthly monitoring for analytical suites as a spot-check for organic compounds as: • Total Purgeable Organic Compounds, EPA 624.1 • Base-Neutral Acids (Semi-Volatile Organics), EPA Method 625.1 • Total PAHs, EPA Method 8270 Table 2—Applicant's Summary- Groundwater Analytical Data Tab I SUWMM of Orton*~AnYyacal om Pwr CMD Mown MewMMMo Prop«y Chrlaft Noah Cropna HiN.Inn Na TCR-0W fr1yM L..Oc 2 WW3 M'A'I Su1r�Wsr 7l SMrtoYro 7MgM DM O.f2CJ11 17AO00 ON11q'2 4.1,17 170fl70 0!Sn7l77 0v2!L11 12NN70 06'17/27 !Slt 1112{OUPI 04/2d1! t2,C6`l0 obt/?2 „ntY!i 6a00 20W"' CNn/nm 12 1 0 0.20 J 2. 11 11 J B7 l 70 7 000'1i 1.2-0.ra0. 0— 3 n 165 _t ] 20 N p0" f ..dd COJ10.Mr 0 771 a. 1!" M."Iwi Yl ta-I WOE I 0 33 J 20 0 12.. TMOdar.W 1IM In in 2.310 0.70 331, at u W a 7 11 I-adwowwwo 17 In 2 1 t o 3 3a co7J 10 to' Baum 1.2 at 15. M3 100 710a0- faOmM 0a731 G0 , 2 031 , Cn!vnwm lT�! owj 73 21 o50J t0 CC'm S3I'" C,'_tt— lwtl 0351 t5 152"" K#_ 0 012'" Selen.�n 0 1I J 0 OM3 J 20 5 S!Aw 20 00!i"• Fact Sheet NEW NPDES Permit NC0090166 Press Club Cleaners-Brownfields Property,Charlotte Page 3 of 9 5.0 ESTABLISHING COMPLIANCE & PERMIT LIMITS The Applicant proposes to discharge to an established storm-sewer inlet adjacent SE to the site on Morehead Drive. Because this outfall discharges to a storm-sewer inlet, the Division will assume zero flow receiving-stream conditions offering no dilution,per NPDES permitting guidance statewide. Permit limits reflect Contaminants of Concern (COCs) based on analytes "known to be present" [See EPA Application form 2D]. • If an analyte has an established surface water quality standard, DWR has applied this standard as the permit limit, both as acute and chronic [see section A. (1)]. • DWR recommends Weekly monitoring for these organic and inorganic analytes considering a continuous flow (see permit Section A. (1.)]. • Metals in dissolved fraction require effluent monitoring for Total Hardness to established compliance with EPA guidelines [see below, 9.0]. Reasonable Potential Analyses (RPAs) -- Current databases do not include treated effluent but reflect site-assessment data from monitoring wells and soil borings only. Therefore, no RPA was conducted for this evaluation. Soil and groundwater analyses were reviewed to provide potential COCs. Permit Table A. (1) includes a footnote allowing the Permittee to petition DWR to alter parameters and/or monitoring frequency, as future data may warrant [see permit section A. (1.)]. Whole Effluent Toxicity(WET) Testing -- This facility applies granular activated carbon (GAC) filters as a final treatment to polish its effluent before discharge. DWR has therefore applied WET testing as Acute 48-hr,Monthly(unlimited), "Monitor and Report" [TAA6C] considering that GAC-polished effluent may likely render the discharge devoid of nutrients (too clean)to support aquatic test species [see A. (1.)]. 6.0 PERMISSIONS & ENGINEERING ALTERNATIVES ANALYSIS (EAA) The Applicant documents permission for a discharge to local stormsewer from Charlotte Water and Sewer Authority. As required of all new discharges, the Applicant presented an Engineering Alternatives Analysis (EAA) as: Ground surface/subsurface applications • spray/drip irrigation, • infiltration galleries • wastewater reuse • injection wells After considering the above, the Applicant judged these discharge alternatives "not feasible//not feasible,"because suitable land is not available, and therefore they did not evaluate present value costs. The EAA further evaluated surface-waters for potentially impacted species identifying impaired waters 6.5 miles downstream. They conclude there would be no impact. Fact Sheet NEW NPDES Permit NC0090166 Press Club Cleaners-Brownfields Property,Charlotte Page 4 of 9 7.0 PROPOSED SCHEDULE OF ISSUANCE Draft Permit to Public Notice: 14Mar2023 (est.) Permit Scheduled to Issue: 21 Apr2023 (est.) Effective Date 01 Jun2023 (est.) 8.0 NPDES DIVISION CONTACT If you have questions a ut ny of above information, or on the attached permit, please email Joe R. Corporon, P.G. Uoe.corporon@nc enr ov]. NAME: DATE: 20APR2023 Joe . Corporon, G J 9.0 EPA METALS EVALUATION— for TOTAL HARDNESS NPDES Implementation of Instream Dissolved Metals Standards —Freshwater Standards The NC 2007-2015 Water Quality Standard(WQS) Triennial Review was approved by the NC Environmental Management Commission(EMC) on November 13, 2014. The US EPA subsequently approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as approved. Table 3. NC Dissolved Metals Water Quality Standards/A uatic Life Protection Parameter Acute FW, µg/l Chronic FW, µg/l Acute SW, µg/l Chronic SW, µg/1 (Dissolved) (Dissolved) (Dissolved) (Dissolved) Arsenic 340 150 69 36 Beryllium 65 6.5 --- --- Cadmium Calculation Calculation 40 8.8 Chromium III Calculation Calculation --- --- Chromium VI 16 11 1100 50 Copper Calculation Calculation 4.8 3.1 Lead Calculation Calculation 210 8.1 Nickel Calculation Calculation 74 8.2 Silver Calculation 0.06 1.9 0.1 Zinc Calculation Calculation 90 81 Table 3 Notes: 1. FW=Freshwater, SW= Saltwater 2. rmarcmuMtM=Hardness dependent standard Fact Sheet NEW NPDES Permit NC0090166 Press Club Cleaners-Brownfields Property,Charlotte Page 5 of 9 3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life standards for Mercury and selenium are still expressed as Total Recoverable Metals due to bioaccumulative concerns (as are all human health standards for all metals). It is still necessary to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC 2B.0200 (e.g., arsenic at 10 µg/l for human health protection; cyanide at 5 µg/L and fluoride at 1.8 mg/L for aquatic life protection). Table 3. Dissolved Freshwater Standards for Hardness-Dependent Metals The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A NCAC 02B .0211 Subparagraph (11)(d) Metal NC Dissolved Standard, /l Cadmium,Acute WER*{1.136672-[ln hardness](0.041838)) e^{0.9151 [In hardness]-3.14851 Cadmium,Acute Trout waters WER*{1.136672-[ln hardness](0.041838){ e^{0.9151[ln hardness]-3.6236{ Cadmium,Chronic WER*{1.101672-[ln hardness](0.041838)1 e^{0.7998[ln hardness]-4.445 11 Chromium III,Acute WER*0.316 e^{0.8190[ln hardness]+3.7256{ Chromium III,Chronic WER*0.860 e^{0.8190[ln hardness]+0.6848{ Copper,Acute WER*0.960 e^{0.9422[ln hardness]-1.700) Copper,Chronic WER*0.960 e^{0.8545[ln hardness]-1.702) Lead,Acute WER*{1.46203-[ln hardness](0.145712)) •e All.273[In hardness]-1.4601 Lead,Chronic WER*{1.46203-[ln hardness](0.145712)} • eAll.273[In hardness]-4.705} Nickel,Acute WER*0.998 e^{0.8460[ln hardness]+2.255) Nickel,Chronic WER*0.997 e^{0.8460[ln hardness]+0.0584} Silver,Acute WER*0.85 •e All.72[ln hardness]-6.59} Silver,Chronic Not applicable Zinc,Acute WER*0.978 e^{0.8473[In hardness]+0.8 841 Zinc,Chronic WER*0.986 e^{0.8473[ln hardness]+0.884} General Information on the Reasonable Potential Analysis (RPA) The RPA process itself did not change as the result of the new metals standards. However, application of the dissolved and hardness-dependent standards requires additional consideration in order to establish the numeric standard for each metal of concern of each individual discharge. The hardness-based standards require some knowledge of the effluent and instream(upstream) hardness and so must be calculated case-by-case for each discharge. Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The discharge-specific standards must be converted to the equivalent total values for use in the RPA calculations. We will generally rely on default translator values developed for each metal (more on that below),but it is also possible to consider case-specific translators developed in accordance with established methodology. RPA Permitting Guidance/WOBELs for Hardness-Dependent Metals -Freshwater Fact Sheet NEW NPDES Permit NCO090166 Press Club Cleaners-Brownfields Property,Charlotte Page 6 of 9 The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern,based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable standards and the critical low-flow values for the receiving stream. If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If monitoring for a particular pollutant indicates that the pollutant is not present(i.e. consistently below detection level), then the Division may remove the monitoring requirement in the reissued permit. 1. To perform a RPA on the Freshwater hardness-dependent metals the Permit Writer compiles the following information: • Critical low flow of the receiving stream, 7Q10 (the spreadsheet automatically calculates the 1 Q 10 using the formula 1 Q 10 =0.843 (s7Q 10, cfs) 0.993 • Effluent hardness and upstream hardness, site-specific data is preferred • Permitted flow • Receiving stream classification 2. In order to establish the numeric standard for each hardness-dependent metal of concern and for each individual discharge, the Permit Writer must first determine what effluent and instream (upstream)hardness values to use in the equations. The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any hardness data and contacts the Permittee to see if any additional data is available for instream hardness values,upstream of the discharge. If no hardness data is available, the permit writer may choose to do an initial evaluation using a default hardness of 25 mg/L (CaCO3 or(Ca+Mg)). Minimum and maximum limits on the hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively. If the use of a default hardness value results in a hardness-dependent metal showing reasonable potential, the permit writer contacts the Permittee and requests 5 site-specific effluent and upstream hardness samples over a period of one week. The RPA is rerun using the new data. The overall hardness value used in the water quality calculations is calculated as follows: Combined Hardness (chronic)_ (Permitted Flow,cfs *Avg.Effluent Hardness,mg/L)xs7Q10, cfs *Avg.Upstream Hardness,mg/L) (Permitted Flow, cfs+s7Q10,cfs) The Combined Hardness for acute is the same but the calculation uses the 1Q10 flow. 3. The permit writer converts the numeric standard for each metal of concern to a total recoverable metal, using the EPA Default Partition Coefficients (DPCs) or site-specific translators, if any have been developed using federally approved methodology. Fact Sheet NEW NPDES Permit NC0090166 Press Club Cleaners-Brownfields Property,Charlotte Page 7 of 9 EPA default partition coefficients or the"Fraction Dissolved"converts the value for dissolved metal at laboratory conditions to total recoverable metal at in-stream ambient conditions. This factor is calculated using the linear partition coefficients found in The Metals Translator: Guidance for Calculating a Total Recoverable Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996)and the equation: Cdiss - 1 Ctotal 1 + { [Kpo] [SS(l+a)] [10-1] } Where: ss=in-stream suspended solids concentration [mg/1],minimum of 10 mg/L used, and Kpo and a=constants that express the equilibrium relationship between dissolved and adsorbed forms of metals. A list of constants used for each hardness- dependent metal can also be found in the RPA program under a sheet labeled DPCs. 4. The numeric standard for each metal of concern is divided by the default partition coefficient(or site-specific translator) to obtain a Total Recoverable Metal at ambient conditions. In some cases, where an EPA default partition coefficient translator does not exist(ie. silver), the dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is dissolved to the same extent as it was during EPA's criteria development for metals. For more information on conversion factors see the June, 1996 EPA Translator Guidance Document. 5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration (permit limits) for each pollutant using the following equation: Ca= (s7Q10+ Qw) (Cwgs)-s7Q10) (Cb) QW Where: Ca=allowable effluent concentration (µg/L or mg/L) Cwqs =NC Water Quality Standard or federal criteria(µg/L or mg/L) Cb=background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L) Qw=permitted effluent flow(cfs, match s7Q10) s7Q10= summer low flow used to protect aquatic life from chronic toxicity and human health through the consumption of water, fish, and shellfish from noncarcinogens (cfs) * Discussions are on-going with EPA on how best to address background concentrations Flows other than s7Q 10 may be incorporated as applicable: IQ 10 =used in the equation to protect aquatic life from acute toxicity QA=used in the equation to protect human health through the consumption of water, fish, and shellfish from carcinogens 30Q2 =used in the equation to protect aesthetic quality Fact Sheet NEW NPDES Permit NCO090166 Press Club Cleaners-Brownfields Property,Charlotte Page 8 of 9 6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern. Data entered must have been taken within four and one-half years prior to the date of the permit application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper concentration of each pollutant. The Predicted Max concentrations are compared to the Total allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds the acute or chronic Total allowable concentrations, the discharge is considered to show reasonable potential to violate the water quality standard, and a permit limit (Total allowable concentration) is included in the permit in accordance with the U.S. EPA Technical Support Document for Water Quality-Based Toxics Control published in 1991. 7. When appropriate,permit writers develop facility specific compliance schedules in accordance with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on 40 CFR 122.47 Compliance Schedule Requirements. 8. The Total Chromium NC WQS was removed and replaced with trivalent chromium and hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data results may be used as a conservative surrogate in cases where there are no analytical results based on chromium III or VI. In these cases, the projected maximum concentration (95th%) for total chromium will be compared against water quality standards for chromium III and chromium VI. 9. Effluent hardness sampling and instream hardness sampling,upstream of the discharge, are inserted into all permits with facilities monitoring for hardness-dependent metals to ensure the accuracy of the permit limits and to build a more robust hardness dataset. 10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included: Table 4 Parameter Value Comments (Data Source Average Effluent Hardness (mg/L) TBD [Total as, CaCO3 or(Ca+Mg)] Average Upstream Hardness (mg/L) TBD [Total as, CaCO3 or(Ca+Mg)] 7Q 10 summer 0.0 cfs Discharge to storm sewer IQIO 0.0 cfs " Permitted Flow (MGD) 0.075 Outfall 001 (per permit) Fact Sheet NEW NPDES Permit NCO090166 Press Club Cleaners-Brownfields Property,Charlotte Page 9 of 9 Press Club Cleaners -Brownfields NCO090166 /NEW Public Notice Blurb: 14Mar2023 CH MF BTH III - Charlotte LoSo LLC applied for NPDES surface discharge (permit NC0090166) of treated excavation dewatering from its facility, Press Club Cleaners Brownfields, 3305 South Boulevard, Charlotte, Mecklenburg County. The following parameters are water- quality limited: Total Lead, Total Barium,Acetone, BTEX,Naphthalene, Methyl Chloride, 1,2 dichloroethane, Chloroform, and 1,2 dichlorobenzene. This discharge my affect future wasteload allocations to the receiving stream. Press Club Cleaners -Brownfields NCO090166 /NEW Public Notice Blurb: 14Mar2023 CH MF BTH III - Charlotte LoSo LLC applied for NPDES surface discharge (permit NC0090166) of treated excavation dewatering from its facility, Press Club Cleaners Brownfields, 3305 South Boulevard, Charlotte, Mecklenburg County. The following parameters are water- quality limited: Total Lead, Total Barium,Acetone, BTEX,Naphthalene, Methyl Chloride, 1,2 dichloroethane, Chloroform, and 1,2 dichlorobenzene. This discharge my affect future wasteload allocations to the receiving stream.