MassDEP Tier Classified Chapter 21E Oil and Hazardous Materials Release SitesEntry ID: MassGIS_GISDATA.C21E_PT
Abstract: The MassDEP Tier Classified Oil and/or Hazardous Material Sites datalayer is a statewide point dataset containing the approximate location of oil and/or hazardous material disposal sites that have been (1) reported and (2) Tier Classified under M.G.L. Chapter 21E and the Massachusetts Contingency Plan (MCP). Location types featured in this datalayer include the approximate center of a site, the ... center of a building on the property where the release occurred, the source of contamination, or the location of an on-site monitoring well. For the purposes of this document, the terms "MassDEP Tier Classified oil and/or hazardous material disposal sites" and "Tier Classified Chapter 21E sites" are synonymous and are often referred to simply as "sites". Releases of oil and/or hazardous materials are reported to the Massachusetts Department of Environmental Protection's (MassDEP) Bureau of Waste Site Cleanup (BWSC), according to procedures established in the MCP (310 CMR 40.0000). The sites mapped in this datalayer represent only a subset of the total reported Chapter 21E sites tracked by MassDEP BWSC. Chapter 21E sites that have not yet been Tier Classified are not contained in this datalayer. Under Massachusetts' Waste Site Cleanup Program, which is a largely privatized program, Tier IA classified sites and Immediate Response Actions (IRAs) at any site receive direct MassDEP oversight. Data maintained by the MassDEP regarding site location are provided to MassDEP BWSC by potentially responsible parties (PRPs) and by licensed site professionals (LSPs), who work for the PRPs. Location data is provided in a paper format (e.g., map and textual information) by PRPs and LSPs and maintained by MassDEP BWSC in individual site files. These site files are available to the public through the MassDEP's Regional Offices. Anyone wishing to view Chapter 21E site files can make arrangements with the regional offices though a Freedom of Information request. MassDEP encourages persons to review these site files when they make decisions that consider a specific site. Most of the site locations included in the MassDEP Tier Classified Oil and/or Hazardous Material Sites datalayer are interpretations of data provided by PRPs and LSPS converted to a digital format by MassDEP staff. These data have not been field-verified. In some cases where file information was inadequate or unavailable, locations were provided by MassDEP technical staff through knowledge gained in the course of their professional activities. The rules requiring notification, assessment and remediation of releases of oil and hazardous materials are codified in the Massachusetts Contingency Plan (MCP) 310 CMR 40.0000. Under the MCP and M.G.L. Chapter 21E, the PRPs are responsible for the timely assessment and cleanup of disposal sites in Massachusetts. The MassDEP BWSC is required to audit PRP response actions performed on 20% of the sites and when necessary provides direct agency oversight of cleanup efforts. If permanent cleanup is not achieved for a disposal site within a year of being reported to MassDEP, the site must be classified as Tier I or II in accordance with the MCP's numerical ranking system (NRS), outlined in 310 CMR 40.1500. The NRS is a point system based on a variety of factors, including the site's complexity, the type of contamination, and the potential for human or environmental exposure to the contamination. In addition, some sites are automatically given a Tier I classification if they pose an imminent hazard or affect public water supplies. A site's Tier Classification determines the level of MassDEP oversight. Tier I sites require a permit and Tier IA sites, considered to be the most complicated sites, require direct MassDEP BWSC oversight.
Purpose: Environmental protection, planning and analysis
SUPPLEMENTAL INFORMATION: Location data contained in this datalayer are based on MassDEP staff interpretation of information provided by PRPs and their LSPs. Point features in this datalayer should ONLY be considered as an "approximation" or "best estimate" of site locations based on the information submitted to the MassDEP BWSC. The accuracy and ... completeness of the information submitted has not been verified by MassDEP. There are other Chapter 21E sites in Massachusetts that are not contained in this datalayer. For example, this datalayer does not include (1) contaminated sites that have not been reported to MassDEP or (2) sites for which a Response Action Outcome (RAO) has been submitted to MassDEP. Furthermore, not all Tier Classified Chapter 21E sites have been located. Please refer to the Unlocated Sites List (C21E_PT_USL) for a current list of unmapped Tier Classified Chapter 21E sites. Tier Classified Chapter 21E site data are extremely temporal. Although the datalayer is updated on a regular basis, it will never be complete or up-to-date. Users should check Massdep BWSC site files (at the appropriate MassDEP Regional Office) for the most current information. MassDEP recognizes that point features are not the ideal spatial model for representing contaminated areas, especially in the case of large sites or if considerable contaminant migration has occurred. Due to the limitations of the information that PRPs and LSPs are currently required to submit to MassDEP, the spatial representation of sites as point features is currently the only realistic method for generating Tier Classified Chapter 21E site data on a statewide scale. Due to the limitations of this datalayer, the following disclaimer language will apply to any MassDEP map product containing Tier Classified 21E site data... Data Disclaimer: Point locations representing Tier Classified Chapter 21E sites in this datalayer have not been field-verified and should be considered approximate. Locations were derived through review and interpretation of paper maps and textual information contained in MassDEP BWSC site files, which are maintained in MassDEP's Regional Offices. Generally, such information was submitted to MassDEP by potentially responsible parties (PRPs) and the PRPs' licensed site professionals (LSPs). Please be advised that this datalayer is incomplete. MassDEP has been unable to locate some sites due to inadequate source material. Sites that are not yet reported or tier-classified are not mapped, nor are sites for which a Response Action Outcome (RAO) has been submitted to MassDEP. Site contamination may extend well away from the point representing a site on this map. The MassDEP BWSC site files should be reviewed for the most accurate and up-to-date information about a particular site. While the Tier Classified Chapter 21E site data shown on this map provides some useful information, the user should be aware of the data's limitations. For further information, please consult the datalayer description documentation of MassDEP Tier Classified Oil and/or Hazardous Material Sites, available on the MassGIS Web Site: http://www.mass.gov/mgis/c21e.htm . Questions regarding Tier Classified Chapter 21E site data on this map may be referred to the MassDEP GIS Program (617) 574-6856.
CURRENTNESS REFERENCE: publication date
SPATIAL DATA ORGANIZATION INFORMATION
Direct Spatial Reference: Vector
SDTS Point and Vector Object Type: Entity point
Point and Vector Object Count: 2368
SPATIAL REFERENCE INFORMATION - PLANAR
Grid Coordinate System Name: State Plane Coordinate System 1983
SPCS Zone Identifier: 2001
Standard Parallel: 41.716667
Standard Parallel: 42.683333
Longitude of Central Meridian: -71.500000
Latitude of Projection Origin: 41.000000
False Easting: 200000.000000
False Northing: 750000.000000
Planar Coordinate Encoding Method: coordinate pair
Abscissa Resolution: 0.000032
Ordinate Resolution: 0.000032
Planar Distance Units: meters
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: North American Datum of 1983
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
DATA SET CREDIT: This data was developed and is maintained by the Massachusetts Department of Environmental Protection (DEP) GIS Program in cooperation with the DEP Bureau of Waste Site Cleanup (BWSC).
NATIVE: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 188.8.131.520
(Click for Interactive Map)
Data Set Citation
Dataset Originator/Creator: MA Department of Environmental Protection
Dataset Title: MassDEP Tier Classified Chapter 21E Oil and Hazardous Materials Release Sites
Dataset Release Date: 2007-12-01
Data Presentation Form: vector digital dataOnline Resource: Server=env-fp-phoenix; Service=esri_sde; User=gisdata; Version=SDE....
Start Date: 2007-12-01
Vertical Resolution: 1.000000
ISO Topic Category
Quality COMPLETENESS REPORT: Location data contained in this datalayer are based on DEP staff interpretation of information provided to the Department by PRPs and their LSPs. Point features in this datalayer should ONLY be considered as an approximation or best estimate of release site locations based on the information submitted to the DEP BWSC. The accuracy and completeness of the information submitted ... has not been verified by the DEP.
There are other Chapter 21E sites in Massachusetts that are not contained in this datalayer. For example, this datalayer does not include (1) contaminated sites that have not been reported to the DEP or (2) sites for which a Response Action Outcome (RAO) has been submitted to the DEP. Furthermore, not all Tier Classified Chapter 21E sites have been located. Please refer to the Unlocated Sites List C21E_PT_USL for a current list of unmapped Tier Classified Chapter 21E sites.
Tier Classified Chapter 21E site data are extremely temporal. Although the datalayer will be updated on a periodic basis, it will never be complete or up-to-date. Users should check BWSC site files (at the appropriate DEP Regional Office) for the most current information.
The DEP recognizes that point features are not the ideal spatial model for representing contaminated areas, especially in the case of large sites or if considerable contaminant migration has occurred. Due to the limitations of the information that PRPs and LSPs are currently required to submit to the DEP, the spatial representation of sites as point features is currently the only realistic method for generating Tier Classified Chapter 21E site data on a statewide scale.
HORIZONTAL POSITIONAL ACCURACY REPORT: Most DEP Chapter 21e release site locations are estimated to be within +/-100 feet (30.5m), and the coarsest estimated horizontal accuracy for this data is +/-1,000 feet (305m). Location accuracy estimates for release sites are provided in the L_ACC_EST column of the related Location Documentation Table (C21E_PT_LDT).
VERTICAL POSITIONAL ACCURACY REPORT: Not Applicable
Access Constraints ACCESS CONSTRAINTS: None
DISTRIBUTION LIABILITY: Please see the "PURCHASE AGREEMENT FOR DIGITAL DATA PROVIDED BY THE MASSACHUSETTS EXECUTIVE OFFICE OF ENVIRONMENTAL AFFAIRS", online at http://www.state.ma.us/mgis/puragree.htm.
CUSTOM ORDER PROCESS: Please contact MassGIS with questions regarding alternative methods of receiving data.
Use Constraints USE CONSTRAINTS: None
Technical Prerequisites: MassGIS' data may be used in many standard GIS software products. See each software's vendor for technical prerequisites.
Data Set Progress
Distribution Size: 0.094
Fees: See Use Constraints.
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: (617) 574-6856
Email: aaron.richer at state.ma.us
1 Winter Street Suite 500
Province or State: MA
Postal Code: 02108
Creation and Review Dates
DIF Creation Date: 2007-12-27
Last DIF Revision Date: 2009-03-25