Parent Layer: UMBC

Name: UMBC2024PennsyDrPassiveSW- Passive

Display Field: Project

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: 12 passive samplers made of polyethylene sheets were deployed in various locations along the stretch of LBC that runs parallel to Pennsy Drive in Hyattsville, MD. The samplers are placed in a metal mesh envelope which is attached to a u-post to secure the sampler to the location site. The samplers were positioned to sample the overlying water in the creek. Nine samplers were deployed in LBC, and three samplers were deployed in smaller tributaries that feed into LBC, to identify areas of elevated PCB concentrations in the surface water. Only surface water passive samplers were deployed (i.e., no porewater samplers were deployed in this project). The samplers were deployed on April 17th, 2024 and retrieved on June 18th, 2024, for a total deployment time of 62 days. The samplers were taken back to the Ghosh lab at UMBC where PCBs were extracted from the passive samplers with hexane, treated with copper to remove sulfur from the samples, and run through a silica gel column to remove organic compounds that interfere with PCB detection on the analytical machinery. The samples were run on a Agilent 6890N Gas Chromatograph with electron capture detection for quantification and data analysis. The measurements were converted to freely dissolved water concentrations using the sample concentration, the partition coefficient between water and the sampler, and corrected for non-equilibrium using Performance Reference Compounds (PRCs) pre-loaded on the passive samplers. Standard Operating Procedure (SOP) developed by the Ghosh lab are available for each of these sample preparation and analytical methods.

Service Item Id: 4182d67f89014565bf2aa1415fbd3ba5

Copyright Text: Ben Marino, Upal Ghosh, Nathalie Lombard, Yu Ting, Jasmine Ives, and Eswar Chandra. Technical Memorandum: Source Tracking of PCB Contamination in Lower Beaverdam Creek. Department of Chemical, Biochemical, and Environmental Engineering University of Maryland, Baltimore County. December 6, 2024

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: -8559983.489
YMin: 4711376.310199998
XMax: -8558752.2955
YMax: 4712649.9454
Spatial Reference: 102100  (3857)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: TotPCBs
Min. Value: 0.78
ClassBreakInfos:
• Class Maximum Value: 1.78
  Label: 0.780000 - 1.780000
  Description: N/A
  Symbol:
  Style: esriSMSCircle
  Color: [0, 168, 132, 255]
  Size: 6.0
  Angle: 0.0
  XOffset: 0
  YOffset: 0
  Outline:
  [0, 0, 0, 255] Width: 0
• Class Maximum Value: 4.96
  Label: 1.780001 - 4.960000
  Description: N/A
  Symbol:
  Style: esriSMSCircle
  Color: [255, 255, 0, 255]
  Size: 6.0
  Angle: 0.0
  XOffset: 0
  YOffset: 0
  Outline:
  [0, 0, 0, 255] Width: 0
• Class Maximum Value: 15.08
  Label: 4.960001 - 15.080000
  Description: N/A
  Symbol:
  Style: esriSMSCircle
  Color: [255, 0, 0, 255]
  Size: 6.0
  Angle: 0.0
  XOffset: 0
  YOffset: 0
  Outline:
  [0, 0, 0, 255] Width: 0
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Project ( type: esriFieldTypeString, alias: Project, length: 8000 )
• LocationID ( type: esriFieldTypeString, alias: LocationID, length: 8000 )
• Lat ( type: esriFieldTypeDouble, alias: Lat )
• Lon ( type: esriFieldTypeDouble, alias: Lon )
• Matrix ( type: esriFieldTypeString, alias: Matrix, length: 8000 )
• Analyte ( type: esriFieldTypeString, alias: Analyte, length: 8000 )
• TotPCBs ( type: esriFieldTypeDouble, alias: TotPCBs )
• Units ( type: esriFieldTypeString, alias: Units, length: 8000 )
• Notes ( type: esriFieldTypeString, alias: Notes, length: 8000 )
• CollectDate ( type: esriFieldTypeString, alias: CollectionDate, length: 255 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata