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Home My WebLink AboutNCS000348_Emails RE Guidance on Creosote Method for Lab Testing_20200630Georgoulias, Bethany From: Georgoulias, Bethany Sent: Tuesday, June 30, 2020 3:26 PM To: Lambe, Brian Cc: Lucas, Annette Subject: RE: [External] FW: CPI SOUTHPORT STORMWATER Permit # NCS000348 Attachments: NCDENR_DWR_WSS_LAB_PQLs.pdf Brian, Here's some guidance on this. Chris Ventaloro reminded us that he got the value (0.009) from an ECOTOX database calculation for saltwater (which won't necessarily tell you testing method), and Connie Brower tapped a former colleague in Waste Management for guidance on what method to use for testing: Method 8270 (Semi -volatile Organic Compounds analysis) Creosote is classified as U051(some kind of waste classification). The primary chemicals of concern in creosote with harmful health effects are PAHs, phenols, and cresols. Method 8270 will pick up all three types of compounds. Attached is the PQL list from the lab; the SVOA Method 8270 list of compounds is included here. I'm not sure which ones to exclude, but if the total is below the creosote benchmark, we know levels are acceptable. If the total is above the benchmark, we would need to figure out whether the levels are compounds that are not part of creosote. So, if total SVO from 8270 comes back above 0.009 mg/I, we'll need to look into it further. Hope this helps as at least a beginning point. Bg Bethany Georgoulias Environmental Engineer Stormwater Program, Division of Energy, Mineral, and Land Resources N.C. Department of Environmental Quality 919 707 3641 office bethany.georgoulias@ncdenr.gov 512 N. Salisbury Street, Raleigh, NC 27604 (location) 1612 Mail Service Center, Raleigh, NC 27699-1612 (mailing) Website: http://deq.nc.gov/about/divisions/energy-mineral-land-resources/stormwater Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties Based on the current guidance to minimize the spread of COVID-19, the Department of Environmental Quality has adjusted operations to protect the health and safety of the staff and public. Many employees are working remotely or are on staggered shifts. To accommodate these staffing changes, all DEQ office locations are limiting public access to appointments only. Please check with the appropriate staff before visiting our offices, as we may be able to handle your NC DENR DWR WSS WW/GW Chemistry Lab QA/QC Limits PQLs Dept Unit Parameter Analyte Analysis Method Aqueous Non -Aqueous Tissue QCS % Rec Spike % Rec Spike % RPD PQL QCS % Rec Spike % Rec Spike % RPD PQL QCS % Rec Spike % Rec Spike % RPD PQL Organics Pesticides Organochlorine Endosulfan Sulfate EPA 608 / SW-8468081 B 115 53-114 18 0.03 µg/L ±15 +30 30 2 µg/Kg Organics Pesticides Organochlorine Endrin EPA 608 / SW-846 8081 B ±15 56-121 21 0.03 µg/L ±15 61-139 45 2 jig/Kg Organics Pesticides Organochlorine Endrin Aldehyde EPA 608 / SW-846 8081 B ±15 26-127 25 0.03 µg/L ±15 ±30 30 2 µg/Kg Organics Pesticides Organochlorine Endrin Ketone EPA 608 / SW-846 8081 B ±15 70-130 20 0.03 µg/L ±15 ±30 30 2 µg/Kg Organics Pesticides Organochlorine Heptachlor EPA 608 / SW-846 8081 B ±15 43-120 14 0.03 µg/L ±15 59-130 31 2 µg/Kg Organics Pesticides Organochlorine Heptachlor Epoxide EPA 608 / SW-846 8081 B ±15 53-103 16 0.03 µg/L ±15 ±30 30 2 µg/Kg Organics Pesticides Organochlorine Methoxychlor EPA 608 / SW-846 8081 B ±15 47-137 24 0.03 µg/L ±15 ±30 30 2 µg/Kg Organics Pesticides Organochlorine Toxa hene EPA 608 / SW-846 8081 B ±15 ±30 20 3 µg/L ±15 ±30 20 200 Kg Organics Pesticides Or anonitro en Ametryn EPA 619 / SW-846 8141 B ±10 67-118 16 5 µg/L ±10 ±30 30 330 µ Kg Organics Pesticides Organonitro en Atraton EPA 619 / SW-846 8141 B ±10 54-140 16 5 µg/L ±10 ±30 30 330 µg/Kg Organics Pesticides Organonitro en Atrazine EPA 619 / SW-846 8141 B ±10 76-125 15 5 µg/L ±10 ±30 30 330 µg/Kg Organics Pesticides Organonitro en Prometon EPA 619 / SW-846 8141 B ±10 53-215 16 5 µg/L ±10 ±30 30 330 µg/Kg Organics Pesticides Organonitro en Prometr n EPA 619 / SW-846 8141 B ±10 70-122 16 5 µg/L ±10 ±30 30 330 µg/Kg Organics Pesticides Or anonitro en Pro azine EPA 619 / SW-846 8141 B ±10 1 77-123 19 5 µg/L ±10 ±30 30 330 µ Kg Organics Pesticides Or anonitro en Secbumeton EPA 619 / SW-846 8141 B ±10 18 5 µg/L ±10 ±30 30 330 µg/Kg Organics Pesticides Or anonitro en Simazine EPA 619 / SW-846 8141 B ±10 54-190 18 5 µg/L ±10 ±30 30 330 µg/Kg Organics Pesticides Or anonitro en Simetr n EPA 619 / SW-846 8141 B ±10 68-136 18 5 µg/L ±10 ±30 30 330 Kg Organics Pesticides Or anonitro en Terbuth lazine EPA 619 / SW-846 8141 B ±10 72-137 15 5 /L ±10 ±30 30 330 Kg Organics Pesticides Or anonitro en Terbut n Prebane EPA 619 / SW-846 8141 B ±10 71-122 16 5 /L ±10 ±30 30 330 Kg Organics Pesticides Organophosphorus Azinphos methyl EPA 614 / SW-846 8141 B ±10 76-176 20 1 µg/L ±10 ±30 30 66 kg/Kg Organics Pesticides Organophosphorus Demeton EPA 614 / SW-846 8141 B ±10 41-146 20 1 µg/L ±10 1 ±30 30 66 kg/Kg Organics Pesticides Organophosphorus Diazinon EPA 614 / SW-846 8141 B ±10 73-139 12 1 µg/L ±10 ±30 30 kg/Kg Organics Pesticides Organophosphorus Disulfoton EPA 614 / SW-846 8141 B ±10 54-130 16 1 µg/L ±10 ±30 30 kg/Kg Organics Pesticides Organophosphorus Ethion EPA 614 / SW-846 8141 B ±10 55-169 14 1 µg/L ±10 ±30 30 kg/Kg Organics Pesticides Organophosphorus Ethyl Parathion EPA 614 / SW-846 8141 B ±10 71-136 14 1 µg/L ±10 ±30 30 kg/Kg w66Vg/Kg Organics Pesticides Organophosphorus Malathion EPA 614 / SW-846 8141 B ±10 62-182 12 1 µg/L ±10 ±30 30 kg/Kg Organics Pesticides Organophosphorus Methyl Parathlon EPA 614 / SW-846 8141 B ±10 57-148 14 1 /L ±10 ±30 30 Or anics Pesticides PCBs Arochlor 1016 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 g/L 70-150 70-150 30Or anics Pesticides PCBs Arochlor 1021 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 g/L 70-150 70-150 30 Organics Pesticides PCBs Arochlor 1032 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 g/L 70-150 70-150 30 66 µg/Kg Organics Pesticides PCBs Arochlor 1042 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 µg/L 70-150 70-150 30 66 jig/Kg Organics Pesticides PCBs Arochlor 1048 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 µg/L 70-150 70-150 30 66 jig/Kg Organics Pesticides PCBs Arochlor 1054 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 µg/L 70-150 70-150 30 66 jig/Kg Organics Pesticides PCBs Arochlor 1260 EPA 608.3 / SW-846 8082 A ±15 70-150 20 1 µg/L 70-150 70-150 30 66 jig/Kg Organics Pesticides PCBs Arochlor 1262 EPA 608.3 / SW-846 8082 A +15 70-150 20 1 µg/L 70-150 70-150 30 66 µg/Kg Organics SVOA SVOA 1,2,4-Trichlorobenzene EPA 625 / SW-846 8270 D +56 1 91 27 10 µg/L +38 79 50 660 µg/Kg Organics SVOA SVOA 1,2-Dichorobenzene EPA 625 / SW-846 8270 D 16 µg/L 660 µg/Kg Organics SVOA SVOA 1,3-Dichorobenzene EPA 625 / SW-846 8270 D 1111W 10 µg/L 660 µg/Kg Organics SVOA SVOA 1,4-Dichorobenzene EPA 625 / SW-846 8270 D +52 85 19 10 µg/L +28 74 50 660 µg/Kg Organics SVOA SVOA 2,4,5-Trichlorophenol EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2,4,6-Trichlorophenol EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2,4-Dichlorophenol EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2,4-Dimethyl phenol EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2,4-Dinitrophenol EPA 625 / SW-846 8270 D 50 µg/L 1 3300 µg/Kg Organics SVOA SVOA 2,4-Dinitrotoluene EPA 625 / SW-846 8270 D +65 96 18 10 µg/L +49 89 50 660 µg/Kg Organics SVOA SVOA 2,6-Dinitrotoluene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2-Chlorophenol EPA 625 / SW-846 8270 D +53 90 23 10 µg/L +25 90 50 660 µg/Kg Organics SVOA SVOA 2-Cholornaphthalene EPA 625 / SW-846 8270 D 10 µg/L 10 µg/Kg Organics SVOA SVOA 2-Methylnaphthalene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2-Methylphenol EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 2-Nitroaniline EPA 625 / SW-846 8270 D 10 µg/L 3300 µg/Kg Organics SVOA SVOA 2-Nitrophenol EPA 625 / SW-846 8270 D 10 µg/L 1 660 µg/Kg Organics SVOA SVOA 3,3'-Dicholorobenzidine EPA 625 / SW-846 8270 D 30 µg/L 1300 µg/Kg Organics SVOA SVOA 3-Nitroaniline EPA 625 / SW-846 8270 D 50 µg/L 3300 µg/Kg Organics SVOA SVOA 4,6-Dinitro-2-Methylphenol EPA 625 / SW-846 8270 D 50 µg/L 3300 µg/Kg Organics SVOA SVOA 4-Bromophenyl phenyl ether EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 4-Chloro-3-Methylphenol EPA 625 / SW-846 8270 D +60 90 18 20 µg/L +38 92 33 660 µg/Kg Organics SVOA SVGA 4-Chloroaniline EPA 625 / SW-946 8270 D 10 µg/L 1300 µg/Kg Organics SVOA SVOA 4-Chlorophenyl phenyl ether EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA 4-Methylphenol EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg 7/9/2019 NC DENR DWR WSS WW/GW Chemistry Lab QA/QC Limits PQLs Dept Unit Parameter Analyte Analysis Method Aqueous Non -Aqueous Tissue QCS % Rec Spike % Rec Spike % RPD PQL QCS % Rec Spike % Rec Spike % RPD PQL QCS % Rec Spike % Rec Spike % RPD PQL Organics SVOA SVOA 4-Nitroaniline EPA 625 / SW-846 8270 D 50 µg/L 3300 µg/Kg Organics SVOA SVGA 4-Nitrophenol EPA 625 / SW-846 8270 D +13 57 30 50 µg/L +30 114 47 3300 µg/Kg Organics SVOA SVOA Acenaphthene EPA 625 / SW-846 8270 D +56 93 16 10 µg/L +31 92 19 660 µg/Kg Organics SVOA SVOA Acenaphthylene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Aniline EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Anthracene EPA 625 / SW-846 8270 D 10 µg/L 10 µg/Kg Organics SVOA SVOA Benzo(a)anthracene EPA 625 / SW-846 8270 D 10 µg/L 10 µg/Kg Organics SVOA SVOA Benzo(a)pyrene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Benzo(k)fluroanthene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Benzo(g,h,i)perylene EPA 625 / SW-846 8270 D 15 µg/L 660 µg/Kg Organics SVOA SVOA Benzo(k)fluoranthene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Benzoic acid EPA 625 / SW-846 8270 D 50 µg/L 3300 jig/Kg Organics SVOA SVOA Benzyl alcohol EPA 625 / SW-846 8270 D 30 µg/L 1 1300 jig/Kg Organics SVOA SVOA Bis(2-chlorethyl)ether EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Bis(2-chloroethoxy)methane EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Bis(2-chloroisopropyl)ether EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Bis(2-ethylhexyl)phtha late EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Butylbenzyl phthalate EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Chrysene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Dibenzo(a,h)anthracene EPA 625 / SW-846 8270 D 15 µg/L 660 µg/Kg Organics SVOA SVOA Dibenzofuran EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Diethyl phthalate EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Dimethyl phthalate EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Di-n-butyl phthalate EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Di-n-octyl phthalate EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Fluoranthene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Fluorene EPA 625 / SW-846 8270 D 12 µg/L 660 µg/Kg Organics SVOA SVOA Hexachlorobutadiene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Hexachlorocyclopentadiene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Hexachloroethane EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Hexachorobenzene (HCB) EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Indeno(1,2,3-cd)-Pyrene EPA 625 / SW-846 8270 D 15 µg/L 660 µg/Kg Organics SVOA SVOA Isophorone EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Naphthalene EPA 625 / SW-846 8270 D 10 µg/L 1 660 µg/Kg Organics SVOA SVOA Nitrobenzene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA N-Nitrosodiphenylamine EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA N-Nitrosodipropylamine EPA 625 / SW-846 8270 D +58 100 20 10 µg/L +41 85 38 660 µg/Kg Organics SVOA SVOA Pentachlorophenol EPA 625 / SW-846 8270 D +47 102 28 30 µg/L +17 108 47 3300 µg/Kg Organics SVOA SVOA Phenanthrene EPA 625 / SW-846 8270 D 10 µg/L 660 µg/Kg Organics SVOA SVOA Phenol EPA 625 / SW-846 8270 D +25 46 22 10 µg/L +26 90 35 660 µg/Kg Organics SVGA SVOA P rene EPA 625 / SW-846 8270 D +56 109 21 10 L +35 97 36 Organics SVOA TPH TPH - DRO SW-846 8015 C +30 124 40 0.5 mg/L 1 +43 134 40 10 mg/Kg Organics VOA 1,4-dioxane 1,4-dioxane EPA 624 / SW-846 8260 B +30 +30 20 1 /L Organics VOA TPH TPH-GRO SW-846 8015 C +20 +20 540 0.20 mg/L +20 +20 <40 6 mg/kg Organics VOA VOA 1,1 Dichloroethane EPA 624 / SW-846 8260 B +30 +30 20 1 µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,1,1,2-Tetrachloroethane EPA 624 / SW-946 8260 B +30 +30 20 1µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,1,1-Trichloroethane EPA 624 / SW-946 8260 B +30 +30 20 1µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,1,2,2-Tetrachloroethane EPA 624 / SW-846 8260 B +30 +30 20 5 µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,1,2-Trichloroethane EPA 624 / SW-946 8260 B +30 +30 20 1µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,1-Dichloroethene EPA 624 / SW-846 8260 B +30 +30 20 1 µg/L 1 +30 +30 20 10 µg/Kg Organics VOA VOA 1,1-Dichloropropene EPA 624 / SW-946 8260 B +30 +30 20 1µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,2,3-Trichlorobenzene EPA 624 / SW-846 8260 B +30 +30 20 1 µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,2,3-Trichloropropane EPA 624 / SW-946 8260 B +30 +30 20 1µg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,2,4-Trichlorobenzene EPA 624 / SW-846 8260 B +30 +30 20 1 WE +30 +30 20 10 µg/Kg Organics VOA VOA 1,2,4-Trimethyl benzene EPA 624 / SW-846 8260 B +30 +30 20 1µ E +30 +30 20 10 µg/Kg Organics VOA VOA 1,2-Dibromo-3-Chloropropane EPA 624 / SW-846 8260 B +30 +30 20 2 WE +30 +30 20 10 µg/Kg Organics VOA VOA 1,2-Dibromoethane EPA 624 / SW-846 8260 B +30 +30 20 1WE +30 +30 20 9µg/Kg Organics VOA VOA 1,2-Dichlorobenzene EPA 624 / SW-846 8260 B +30 +30 20 1 WE +30 +30 20 10 µg/Kg Organics VOA VOA 1,2-Dichloroethane EPA 624 / SW-946 8260 B +30 +30 20 lµg/L +30 +30 20 10 µg/Kg Organics VOA VOA 1,2-Dichloropropane EPA 624 / SW-846 8260 B +30 +30 20 1 µg/L +30 +30 20 10 µg/Kg 7/9/2019 requests by phone or email. We appreciate your patience as we continue to serve the public during this challenging time. From: Lambe, Brian Sent: Monday, June 29, 2020 4:32 PM To: Georgoulias, Bethany <bethany.georgoulias@ncdenr.gov> Subject: FW: [External] FW: CPI SOUTHPORT STORMWATER Permit # NCS000348 CPI and I have been wrestling around with what to do with the Creosote requirement. They, we, don't know what to test for. I asked Lauren for clarification, you were copied, she gave me a parameter number and a benchmark. The parameter really didn't tell the lab what to test for. The benchmark is 0.009mg/L of WHAT? My reading lead me to testing for PAH's, but I don't know. What do you think? Brian Lambe Environmental Specialist 910-796-7313 919-268-1678 cell State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources 127 Cardinal Drive Extension I Wilmington, NC 28405 910 796 7215 T 1910 350 2004 F I http://portal.ncdennorc web/Ir/ From: Joshua Jones [mailto:iniones@capitalpower.com] Sent: Monday, June 29, 2020 4:01 PM To: Lambe, Brian <brian.lambe@ncdenr.gov> Cc: Ginny Grace <vgrace@capitalpower.com>; Francis Hayward <FHayward@capitalpower.com>; Joshua Jones <Inlones@caPita 1power.com> Subject: [External] FW: CPI SOUTHPORT STORMWATER Permit # NCS000348 External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to report.spam@nc.gov Brian, FYI... See proposed analytical method for creosote, below. This is from our lab. We understand this is an approved method. Are you ok with this? Thanks, Josh Jones From: Ray Porter <Rav@environmentalchemists.com> Sent: Monday, June 29, 2020 3:51 PM To: Joshua Jones <jnlones@caPita 1power.com> Subject: RE: CPI SOUTHPORT STORMWATER Permit # NCS000348 Notice: External Email. Please do not click links, open attachments, or take any other action on this email unless you recognize the source of this email and know the content is safe. Josh, After reviewing the attachments you sent and your storm water permit, I make the following analytical suggestions for the measurement of creosote in your storm water. 1) The term creosote is not specific in the target list required. Creosote is defined in some chemistry sources as "an oily mixture of phenolic compounds. 2) The phenolic compounds I have seen referred to as creosote are three phenols: 2-Methylphenol, 3- Methylphenol and 4-Methylphenol. These are all phenolic and aromatic chemicals. There are other phenolic and aromatic compounds however, 3) We were discussing PAHs also or polynuclear aromatic hydrocarbons. I do not know if the permit writer's intention was to include these instead or in addition to the phenols. Phenols and PAHs, while both are aromatic as both contain benzene rings, are different classes of compounds. 4) Method EPA 625 is a method for measuring both phenols and PAHs in waste water. Phenols are referred to as acids as they extract into methylene chloride from water under acidic conditions. BN, or base neutrals, are extracted under basic conditions. I think the permit writer's intention is analyze for the methylphenols listed in bullet 1. However, clarification for DWQ may be needed to make sure other analytes such as PAHs are required. Ray Porter 910-392-0223 From: Joshua Jones <jnjones@capitalpower.com> Sent: Friday, June 26, 2020 12:08 PM To: Tammy Duran <tammv@environmentalchemists.com>; Bonnie Sanders <bonnie@environ mentalchemists.com>; Ray Porter <Rav@environmentalchemists.com> Cc: Francis Hayward <FHayward@capitalpower.com>; Ginny Grace <vgrace@capitalpower.com>; Joshua Jones <jnlones@caPita Ipower.com> Subject: CPI SOUTHPORT STORMWATER Permit # NCS000348 Please see attachment and read the below, said correspondence with our state inspector, Brian Lambe. Starting in July we will have to submit results for Creosote. We will need for you to provide us with the sample collection bottles, early next week. Please let us know if there is any additional information that you may need from us. Thank you, Josh Jones Subject: RE: [External] RE: CPI SOUTHPORT STORMWATER SDO (NCS000348) Notice: External Email. Please do not click links, open attachments, or take any other action on this email unless you recognize the source of this email and know the content is safe. The best I can figure for the creosote testing is to test for PAHs. You will need to consult with the lab for which methods to use. The parameter that should be used for creosote is 39140. The benchmark is 0.009 mg/L. I attached some fun reading on the subject. https://www.atsdr.cdc.gov/ToxProfiles/TP.asp?id=66&tid=18#bookmarkll Brian Lambe Environmental Specialist 910-796-7313 919-268-1678 cell State of North Carolina I Environmental Quality I Energy, Mineral and Land Resources 127 Cardinal Drive Extension I Wilmington, NC 28405 910 796 7215 T 1910 350 2004 F I htto: oortal.ncdenr.orgiweb ilri This email message, including any attachments, is for the intended recipient(s) only, and contains confidential and proprietary information. Unauthorized distribution, copying or disclosure is strictly prohibited. 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