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Home My WebLink AboutNCS000360 DMR SW (7) a,�N scavlcrs s' DEPARTMENT OF HEALTH & HUMAN SERVICES Public Health Service National Institutes of Health National Institute of Environmental Health Sciences P.O.Box 12233 Research Triangle Park, N.C.27709 Website:www.niehs.nih.gov P-- August 12, 2015 iCM B rt Mr. Bradley Bennett, Supervisor i 8 20 NC Division of Energy, Minerals and Land Resources Stormwater Permitting Program ST®RM�A ER QUALITY 1612 Mail Service Center RMITTING Raleigh,North Carolina 27699-1612 Dear Mr. Bennett: The NIEHS previously requested renewal of NPDES Stormwater Permit NCS000360 in a letter and application package dated February 23, 2015. Additional stormwater monitoring results have been received since the renewal request and are attached for review. These results are documented in the attached tables under the Year 5, Period#2 section and in the Tier 2 report. The attached tables document all analytical,visual, and Tier 2 monitoring results for the current five-year stormwater permit term. There are no additional results pending. In addition,the NIEHS is no longer in Tier 2 status for aluminum concentrations. Please add this updated information to the previously submitted documents and let me know if you have any questions concerning the permit renewal application. Sincerely 74.4114,e1J'"q--K, William K. Steinmetz Environmental Compliance Specialist Enclosures NIEHS Analytical Monitoring Summary SAMPLING YEAR 4 PERIOD #2 - Sampling Outfall Precipitation Field pH Aluminum BOD COD Oil&Grease Total Nitrogen Total Phosphorus EPA Method 624 Date Location Period Number (inches) (pH units) EPA Method 625(SVOC)(mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg!L) (mg/L) (VOC)(mg/L) 07/15/2014 2nd 1 108 3 52 6 90 0 282 ND 35 ND 1 5 0.090 ND Bis(2-ethylhexyl)phthalate=1 7 ug/L 2 105 3.52 6 70 0 301 12 0 40 ND 0 63 0 170 ND Bis(2-ethylhexyl)phthalate=1 7 ug/L 3 104 3 52 6 90 0.789 5 4 25 ND 1 9 0 400 ND ND Stormwater Permit Benchmark Values 6-9 0.75 30 120 30 30 2 Benzene=6.7 Anthracene=.005 Toluene=.0018 Pentachlorophenol= 019 , SAMPLING YEAR 5 PERIOD #1 (UPDATED) Date Sampling Outfall Location Precipitation Field pH Aluminum BOD COD Oil&Grease Total Nitrogen Total Phosphorus EPA Method 624 EPA Method 625(SVOC)(mg/L) Period Number (inches) (pH units) (mg/L) (mg/L) (mg/L) (mg!L) (mg/L) (mg/L) (VOC)(mg/L) 02/09/2015 1st 1 108 0 62 8 20 1.000 9 2 61 ND 4 1 0 070 ND ND 2 105 0 62 7 80 0 679 8 6 54 ND 4 6 0 098 ND ND 3 104 0 62 7 80 2.130 5 0 56 ND 16 0 200 ND ND Stormwater Permit Benchmark Values 6-9 0.75 30 120 30 30 2 Benzene=6 7 Anthracene=.005 Toluene= 0018 Pentachlorophenol= 019 SAMPLING YEAR 5 PERIOD #2 Date Sampling Outfall Location Precipitation Field pH Aluminum BOD COD Oil&Grease Total Nitrogen Total Phosphorus EPA Method 624 EPA Method 625(SVOC)(mg/L) Period Number (inches) (pH units) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (VOC)(mg/L) 07/19/2015 2nd 1 108 0 29 7.90 0 501 11.0 34 ND 1.6 0.081 ND ND 2 105 0 29 7.10 0 166 5 2 47 ND 3 5 0.140 ND Diethylphthalate=3 0 ug/L 3 104 0 29 6 80 0 398 6.7 34 ND 1 4 0 073 ND Butylbenzylphthalate=3 2 ug/L Stormwater Permit Benchmark Values 6-9 . 0.75 30 120 30 30 2 Benzene=6.7 Anthracene=.005 Toluene=.0018 Pentachlorophenol=.019 NIEHS Stormwater Visual Monitoring Summary Year 1/Period 1 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 02/28/2011 0.62 A-Dock 101 Light Brown None 2 2 3 No No Yes South Lot 101 Light Brown None 2 1 1 No No Yes North Lot 101 Light Tan/Clay None 2 2 2 No No Yes F-Module 101 Light Tan None 2 1 1 No No No 103 103 Light Brown None 3 2 2 No No No 104 104 Light Brown None 2 1 2 No No No 105 108 Light Brown None 2 2 1 _ No No No 108 108 Light Brown None 2 2 2 No No No Year 1/Period 2 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 08/27/2011 0.54 A-Dock 101 Light Brown None 2 2 1 1 No No Yes South Lot 101 Light Brown None 2 1 2 No No No North Lot 101 Very Light Brown None 1 1 2 No No _ No F-Module 101 Light Brown None 2 1 1 No No No 103 103 Light Brown None 2 4 3 Yes No Yes Contained leaf litter&grass clippings 104 104 Clear None 1 1 1 1 No No No _ 105 108 Light Clay None 2 1 2 No No No 108 108 Light Brown None 2 1 1 No No No Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 11/04/20111 1.43 1 108 1 108 1 Light Gray 1 None 1 2 1 1 I 2 1 No 1 No 1 No ,I Year 2/Period 1 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 12/21/2011 0.25 A-Dock 101 Light Brown None 2 1 2 No No No South Lot 101 Very Light Brown None 2 1 1 No No No North Lot 101 Light Brown None 2 2 2 No Yes Yes Minor sheen/sediment deposition F-Module 101 Light Brown None 3 2 2 No No No 103 103 Very Light Brown None 1 1 1 No No No 104 104 Very Light Brown None 1 1 1 No No No 105 108 Light Brown None 2 1 2 No No No 108 108 Light Brown None 1 2 2 No No No NIEHS Stormwater Visual Monitoring Summary Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 01/27/20121 0.22 1 108 1 108 1 Light Clay 1 None 1 2 1 2 _ 2 1 No I No 1 No I Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 02/16/20121 0.25 1 108 1 108 1 Light Clay 1 None 1 3 1 2 I 2 1 No 1 No 1 No Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 04/04/20121 0.62 1 108 1 108 1 Light Clay 1 None 1 2 1 1 I 2 1 No 1 No 1 No Year 2/Period 2 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 04/26/2012 0.13 A-Dock 101 Light Clay None 1 1 1 No No No South Lot 101 Light Clay None 1 1 1 ' No No No North Lot 101 Medium Clay None 3 1 1 No No No F-Module 101 Medium Clay None 3 1 1 No No No 103 103 Light Clay None 2 1 1 No No No 104 104 ' Clear None 1 1 1 No No No 105 108 Light Clay None 3 1 2 Yes No No Foam caused by splashing 108 108 Light Clay None 2 2 2 No No No Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 05/09/20121 0.47 1 108 1 108 1 Light Gray 1 None 1 2 1 2 I 3 1 No 1 No 1 No Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 06/11/20121 1.06 1 .108 1 108 1 Light Brown 1 None 1 2 1 I s, 2 1 No 1 No 1 No j Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 07/20/20121 0.14 1 108 1 108 1 Light Brown 1 None X 2 1 1 I 1 1 No 1 No 1 No NIEHS Stormwater Visual Monitoring Summary Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 09/06/20121 0.55 1 108 1 108 1 Dark Brown 1 None 1 2 1 1 I 3 1 No 1 No 1 No I Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 11/13/20121 0.12 1 108 1 108 1 Very Light Gray 1 None 1 2 1 1 I 2 1 No 1 No 1 No I Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 12/12/20121 0 42 1 108 1 108 1 Light Clay 1 None 1 1 1 2 I 2 1 No 1 No 1 No I Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 12/20/20121 0.35 1 108 1 108 1 Light Clay 1 None 1 1 1 2 I 1 1 No 1 No 1 No I Year 3/Period 1 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 02/07/2013! 0.87 A-Dock 101 Clear None 1 1 1 No No No South Lot 101 Clear None 1 1 1 No No No North Lot 101 Clear - None 1 1 1 No No No F-Module 101 Clear None 1 1 1 No No No 103 103 Clear None 1 1 1 No No No 104 104 Clear None 1 1 1 No No No 105 108 Light Clay None 2 1 1 No No No 108 108 Light Clay None 2 1 1 No No No Year 3/Period 2 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 06/26/2013 0.27 A-Dock 101 Very Light Clay None 1 1 1 No No No South Lot 101 Light Clay None 2 1 1 No No No North Lot 101 Light Clay None 2 1 1 No No No F-Module 101 Light Clay None 2 1 1 No No No 103 103 Very Light Clay None 2 1 1 No No No 104 104 Clear None 1 2 1 No No No 105 . 108 Clear None 2 2 1 No No No 108 108 Clear None 2 2 1 No No No NIEHS Stormwater Visual Monitoring Summary Year 4/Period 1 Date Rainfall Outfall Building Color Odor, Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 11/26/2013 1.48 A-Dock 101 Light Gray None • 1 1 2 No No No South Lot 101 Light Brown None 2 1 2 No No No North Lot 101 Light Brown`" None 1 1 3 No No No F-Module 101 Light Gray None 2 2 2 No No No 103 103 Clear None 1 4 4 No- No No Leaf Litter 104 104 Clear None 1 1 2 No No No 105 108 Light Brown None 2 - 1 1 No No No 108 108 Light Brown None 2 2 2 No No No Year 4/Period 2 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 07/15/2014 3.52 A-Dock 101 Light Brown None 2 2 1 No No No South Lot 101 Light Brown None 2 1 1 No No No North Lot 101 Light Orange None 3 1 2 No No No F-Module 101 Light Orange None 2 1 1 No No No 103 103 Flooded/Overgrown-No Access 104 104 Very Light Brown None 2 1 _ 1 No No No 105 108 Very Light Brown None 2 1 1 No No No 108 108 Light Brown None 2 1 1 No No No Year 5/Period 1 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 02/09/2015 0 62 A-Dock 101 Light Brown None 2 1 2 No No No South Lot 101 Light Gray None 1 1 1 No No No North Lot 101 Light Orange None 2 1 2 No No Yes F-Module 101 Light Orange None 3 1 2 No No No 103 103 Light Gray None 2 1 2 No No No 104 104 Light Brown None 2 2 1 No No No 105 108 Light Brown None 2 1 1 No No No 108 108 Light Brown None 2 2 2 Yes No No NIEHS Stormwater Visual Monitoring Summary Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 04/30/20151 0.98 1 104 1 104 1 Brown 1 None 1 3 1 2 I 3 1 No 1 No 1 No I Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 0509/20151 0.22 1 104 1 104 1 Light Orange 1 None 1 2 1 1 I 1 1 No 1 No 1 No Tier 2 Visual Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 06/01/20151 0.15 1 104 1 104 1 Light Orange 1 None 1 1 1 1 I 1 1 No 1 No 1 No . I Year 5/Period 2 Date Rainfall Outfall Building Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen Erosion/Deposition Other Indicators 07/19/2015 0.29 A-Dock 101 Light Gray None 2 2 2 No No No South Lot 101 Light Orange None 2 2 2 No No No North Lot ' 101 Light Orange None 2 1 1 No No Yes F-Module 101 Light Orange . None 2 1 1 No No No 103 103 Light Gray None 2 1 2 No No No 104 104 Clear None 1 1 1 No No No 105 108 Light Orange None 2 1 2 No No No 108 108 Light Orange None 2 1 2 No No No NIEHS Tier Tier 2 Monitoring Tier Two Monthly Sampling (Outfall #1) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier Two Response (mg/L) (mg/L) 11/4/2011 Building 108 Outfall Aluminum 1.600 0 75 Steinmetz November Monthly Sample Building 108 Sluiceway Aluminum 2.210 0.75 , Steinmetz Tier Two Response Building 108 Parking Lot Aluminum 0.210 0.75 Steinmetz Tier Two Response 12/21/2011 Building 108 Outfall Aluminum 0.472 0 75 Steinmetz December Monthly Sample(collected as semiannual) 01/27/2012 Building 108 Outfall Aluminum 0.690 0 75 Steinmetz January Monthly Sample 02/16/2012 Building 108 Outfall Aluminum 0.795 0.75 Steinmetz February Monthly Sample 04/04/2012 Building 108 Outfall Aluminum 0.580 0 75 Steinmetz March Monthly Sample(collected in April) 04/26/2012 Building 108 Outfall Aluminum 0.643 0 75 Steinmetz April Monthly Sample(collected with semianual samples) 05/09/2012 Building 108 Outfall Aluminum 2.070 0 75 Steinmetz May Monthly Sample 06/11/2012 Building 108 Outfall Aluminum 1.030 0.75 Steinmetz June Monthly Sample(Storm drain filter installed) 07/20/2012 Building 108 Outfall Aluminum 1.580 0.75 Steinmetz July Monthly Sample(Storm drain filter installed) 09/06/2012 Building 108 Outfall Aluminum 1.520 0.75 Steinmetz August Monthly Sample(collected in September)(Filter removed) 11/13/2012 Building 108 Outfall Aluminum 0.255 0 75 - _ . Steinmetz September Monthly Sample(Collected in November) 12/12/2012 Building 108 Outfall Aluminum 0.102 0 75 Steinmetz October Monthly Sample(Collected in December) 12/20/2012 Building 108 Outfall Aluminum 0.198 0.75 Steinmetz November Monthly Sample(Collected in December) Tier One Reporting (Outfall #1) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier One Response 2/7/2013 Building 108 Outfall Aluminum 0.894 mg/L 0.75 mg/L 3/1/2013 Steinmetz Possible Cause: Excess sand in the stormwater conveyance system from treating icy roads Selected Action: Collected soil&sand samples on 06/29/2011 Results from 06/29/2011 samples indicate that sand used to treat icy roads contains aluminum Preventative Measures: Assure that sand is only applied to roads when needed to treat actual icy conditions Also,remove roadside sediment buildup along the Power Alley curb as needed Tier One Reporting (Outfall #2) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier One Response 2/7/2013 Building 105 Outfall Aluminum 0.954 mglL 0.75 mgIL 3/1/2013 Steinmetz Possible Cause: Residual sand in the Building 102 contractor parking lot from treating icy roads Selected Action: Collected soil&sand samples on 06/29/2011 Results from 06/29/2011 samples indicate that sand used to treat icy roads contains aluminum Preventative Measures: Assure that sand is only applied to roads when needed to treat actual icv conditions • NIEHS Tier 1 Tier 2 Monitoring Tier One Reporting (Outfall #3) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier One Response 7/15/2014 Building 104 Outfall Aluminum 0.789 mgIL 0.75 mg/L 8/8/2014 Steinmetz Possible Cause: Soil erosion from very heavy rainfall event(3 52") Selected Action: Collected soil&sand samples on 06/29/2011 Results from 06/29/2011 samples indicate that area soils contain aluminum Preventative Measures: Verified that sediment is not building up in the stormwater conveyance system upstream from the sampling point Aluminum levels above the benchmark at this outfall are considered to be an isolated event Tier One Reporting (Outfall #1) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier One Response 2/9/2015 Building 108 Outfall Aluminum 1.000 mg►L 0.75 mg/L 3/6/2015 Steinmetz Possible Cause: Excess sand in the stormwater conveyance system from treating icy roads Selected Action: Collected soil&sand samples on 06/29/2011 Results from 06/29/2011 samples indicate that sand used to treat icy roads contains aluminum Preventative Measures: Assure that sand is only applied to roads when needed to treat actual icy conditions Also,remove roadside sediment buildup along the Power Alley curb as needed Tier Two Reporting (Outfall #3) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier Two Response 2/9/2015 Building 104 Outfall Aluminum 2.13 mglL 0.15 mg/L 3/6/2015 Steinmetz Possible Cause: Excess sand in the stormwater conveyance system from treating icy roads 'Selected Action: Begin monthly samples for aluminum in April 2015 Consider study of downstream aluminum levels April sample above benchmark uoi I ofZU 10-Keinspectea curosiae ana roaa surfaces upstream from me rimming I U4 outran Very little sand and sediment remains upstream of this outfall Street cleaning is not required at this time May sample below benchmark• - June sample below benchmark July sample below benchmark 07/19/2015-Monthly sampling ends after three consecutive samples less than benchmark NIEHS Tier I Tier 2 Rik nitoring Tier Two Monthly Sampling (Outfall #3) Sample Date Location Parameter Result Benchmark Inspection Date Inspector Tier Two Response (mgIL) (mg/L) 4/30/2015 Building 104 Outfall Aluminum 5.090 0.75 Steinmetz April Monthly Sample 5/19/2015 Building 104 Outfall Aluminum 0.496 0 75 Steinmetz May Monthly Sample 6/1/2015 Building 104 Outfall Aluminum 0.670 0.75 Steinmetz June Monthly Sample 7/19/2015 Building 104 Outfall Aluminum 0.398 0.75 Steinmetz July Monthly Sample(Monthly monitoring no longer required)