Newtown Creek Superfund Site Background Data Summary CAG Meeting December 16, 2015

Transcription

1 Regin 2 serving the peple f New Jersey, Newtwn Creek Superfund Site Backgrund Data Summary CAG Meeting December 16, 2015 CSTAG Meeting May 19-20, 2014 May 19,

2 Regin 2 serving the peple f New Jersey, Objectives Summarize the Phase 1 and Phase 2 data cllected t characterize backgrund cnditins. Present examples cmparing backgrund data with Newtwn Creek data fr key chemicals f cncern. 2

3 Regin 2 serving the peple f New Jersey, Definitin f Backgrund EPA Guidance defines backgrund as substances r lcatins that are nt influenced by the releases frm a site, and are usually described as naturally ccurring r anthrpgenic. Naturally Occurring -Substances present in the envirnment in frms that have bt been influenced by human activity. Anthrpgenic - Natural and human-made substances present in the envirnment as result f human activities nt specifically related t the CERCLA site in questin. EPA risk assessment guidance als prvides guidance applying backgrund cncentratin data. Risk assessment refers t these backgrund areas as reference areas 3

4 Regin 2 serving the peple f New Jersey, Definitin f Backgrund (cnt d) Backgrund Reference Area - A backgrund reference area is where samples are cllected fr cmparisn with samples frm the site. Ideally has the same physical, chemical, gelgical, and bilgical characteristics as the site being investigated Hasntbeenaffectedbyactivities atthesite 4

5 Regin 2 serving the peple f New Jersey, Backgrund Data Cllectin During the RI Phase1andPhase2backgrunddata Surface Sediment Surface water Tissue Other Prject data that can infrm characterizatin f reginal cnditins East River surface water data Existing studies f backgrund sediment (East River) 5

6 Regin 2 serving the peple f New Jersey, * Backgrund Reference Areas - * * * *Dentes backgrund areas where Phase 2 sampling was perfrmed 6

7 Regin2servingthepeplefNewJersey, Number f Backgrund Samples Medium Number f Samples Surface sediments 143 Surface water (reference areas) 31 Surface water (East River) 87 - Nte: Number f values fr individual analytes may vary. Striped bass fillet 20 Striped bass whle bdy 20 Blue crab muscle/hepatpancreas 20/20 Blue crab whle bdy 20 Mummichg whle bdy 20 Atlantic menhaden whle bdy 20 White perch fillet 5 7

8 Regin 2 serving the peple f New Jersey, Number f Backgrund Samples Cllected Surface Sediment Phase samples cllected frm 14 lcatins Phase 2 40 samples frm 4 lcatins (in blue) Gerritsen Creek Head f Bay Spring Creek Westchester Creek Steinway Creek Sheepshead Bay Mill Basin Hendrix Creek Fresh Creek Basin Cney Island Creek Flushing Creek Brklyn Navy Yard Lwer East River Thrgs Neck 8

9 Regin 2 serving the peple f New Jersey, Number f Backgrund Samples Cllected Surface Water 31 samples (Includes all depths. Des nt include East River) 87 samples (East River) Surface water cunts includes all depths sampled 9

10 Regin 2 serving the peple f New Jersey, Key Elements Shwn in Data Plts Range f variability in backgrund data Number f detected values in backgrund areas Cmparisn f backgrund data with Study Area data 10

11 Regin2servingthepeplefNewJersey, 100 Ttal PCB Cngener in Surface Sediment^ Reference Areas DK WC MC EK/EB mg/kg Distance in Miles Reference Areas nn-ind/nn-cso nn-ind/cso Ind/nn-CSO Ind/CSO ^ ^ ^ Newtwn Creek Dutch Kills Whale Creek Maspeth Creek English Kills East Branch Phase 1 Phase 2 Natinal Grid 11

12 Regin2servingthepeplefNewJersey, 1000 Ttal PAH (16) in Surface Sediment Reference Areas DK WC MC EK/EB mg/kg Distance in Miles Reference Areas nn-ind/nn-cso nn-ind/cso Ind/nn-CSO Ind/CSO ^^ ^ ^ Newtwn Creek Dutch Kills Whale Creek Maspeth Creek English Kills East Branch Phase 1 Phase 2 Natinal Grid 12

13 Regin2servingthepeplefNewJersey, Cpper in Surface Sediment DK WC MC EK/EB Reference Areas mg/kg Distance in Miles Reference Areas nn-ind/nn-cso nn-ind/cso Ind/nn-CSO Ind/CSO ^^ ^ ^ Newtwn Creek Dutch Kills Whale Creek Maspeth Creek English Kills East Branch Phase 1 Phase 2 Natinal Grid 13

14 Regin2servingthepeplefNewJersey, Ttal PAH (16) in Surface Water Reference Areas 1.00 DK WC MC micrgram/l 0.01 Gerritsn Creek (nn-ind/nn-cso) Head f Bay (Ind/nn-CSO) Distance in Miles Reference Areas Spring Creek (nn-ind/cso) Westchester Creek (Ind/CSO) East River Surface Water Sampling Newtwn Creek Dutch Kills Whale Creek Maspeth Creek English Kills East Branch 3 4 Upper Stratified Layer Middle Layer Lwer Stratified Layer Phase I 14

15 Regin2servingthepeplefNewJersey, 100 Ttal PCB Cngener in Surface Water Reference Areas DK WC MC EK/EB 10 - ng/l 1 Gerritsn Creek (nn-ind/nn-cso) Head f Bay (Ind/nn-CSO) Distance in Miles Reference Areas Spring Creek (nn-ind/cso) Westchester Creek (Ind/CSO) East River Surface Water Sampling Newtwn Creek Dutch Kills Whale Creek Maspeth Creek English Kills East Branch 3 4 Upper Stratified Layer Middle Layer Lwer Stratified Layer Phase I 15

16 Regin2servingthepeplefNewJersey, Cpper in Surface Water Reference Areas DK WC MC EK/EB micrgram/l Gerritsn Creek (nn-ind/nn-cso) Head f Bay (Ind/nn-CSO) Distance in Miles Reference Areas Spring Creek (nn-ind/cso) Westchester Creek (Ind/CSO) East River Surface Water Sampling Newtwn Creek Dutch Kills Whale Creek Maspeth Creek English Kills East Branch 3 4 Upper Stratified Layer Middle Layer Lwer Stratified Layer Phase I 16

17 Regin 2 serving the peple f New Jersey, Summary Phase 1 and Phase 2 backgrund data were cllected in accrdance with the RI/FS wrk plan EPA currently evaluating the backgrund data t determine if the data are sufficient fr the RI and risk assessments 17