Cleanup/Screening Levels For Hazardous Waste Sites
	Please note that www.cleanuplevels.com is not an official reference. These links are provided for informational purposes only. If you have a potentially impacted property or are conducting a screening for a property, please contact your local, state and/or federal agency for the most appropriate levels to use.			State Cleanup Levels
				International Cleanup Levels
		FEDERAL Guidance Documents and Values
	USEPA Regional Screening Levels (RSLs)		View	EPA RSLs
		This source is the new king of screening levels. EPA got all Regions 3, 6 and 9 together and, in 2009, came up with these. There are residential and industrial screening levels for soil, air and tap water. EPA regions still have their old screening levels on their websites but with notices to use these. The site also contains a Screening Level Calculator to assist in calculating site-specific screening levels and links to the California Human Health Screening Levels. Good job EPA!!"
	USEPA Soil Screening Guidance (SSG)		View	Soil Screening Guidance
		An older source but one of the building blocks for screening levels. This website gives you the older soil screening levels (SSLs), information on how site screening levels used to be calculated, and the general guidelines EPA used in the past for sites."		Generic SSLs
	USEPA Region 9 Preliminary Removal Goals (PRGs)		View	EPA Region 9 PRGs
		This source, called R9 PRGs for short, was the king of PRGs for years. Now EPA recommends use of the new RSLs. But we present them here for informational purposes.
	USEPA Region 6 Medium-Specific Screening Levels (MSLs)		View	EPA Region 6 MSL Page
		Also replaced by the RSLs but provided for informational purposes. Tables have toxicity info and physical parameters in addition to the soil screening levels.
	USEPA Region 4 Ecological Screening Levels (MSLs)		View	EPA Region 4 Eco Values Page
		A source for both freshwater and saltwater surface water, sediment and soil. As part of the Supplemental Guidance to RAGS: Region 4 Bulletin, Ecological Risk Assessment, originally published November 1995 and last updated November 2001.
	USEPA Region 3 Risk-Based Concentrations (RBCs)		View	EPA Region 3 RBC Tables
		Region 3 has its own table of the RSLs using the Region 3 name of Risk-Based Concentrations (RBCs) still. Also has FISH TISSUE SCREENING LEVELS; updated November 2010. TY Charles!!		Fish Tissue Levels - pdf
				Fish Tissue Levels - excel file
	USEPA RAGS: Part B, Preliminary Removal Goals (RAGS, Part B)		View	RAGS Part B - PRGs
		RAGS Part B is the holy grail of screening levels. Simple document that gives the general risk (intake) equations used in a quantitative risk assessment and the general equations for screening levels termed PRGs (just a note: people use the acronym PRGs for preliminary removal goals, preliminary remedial goals AND preliminary remediation goals....generally we are talking about the same thing). No actual soil levels but does have the original exposure default values used in EPA risk assessments and general calculations of the goals. Examines various pathways and media, though mostly for use with soil. Some of the inhalation defaults have changed since this was written, but it is still a must have for those attempting to determine their own screening levels.
	Federal Drinking Water Standards and Health Advisories		View	MCLs and MCLGs
		This has the national primary (MCLs and MCLGs) and the secondary drinking water standards. A must-have for sites with possibly contaminated groundwater.
	Risk Assessment Information System (RAIS)		View	Chemical PRG Calculator
		RAIS has PRG calculators - one for chemicals and one for radionucleides.		Rad PRG Calculator
	USEPA Soil Preliminary Remediation Levels for Radionucleides		View	PRGs for RAD Page
		This is a collection of sources of guidelines for soil levels for radionucleides in soil.
	USEPA OSWER Provisional Advisories for PFOA and PFOS		View	Provisional PFC Values
		Perfluorochemicals (PFCs) are turning up everywhere. In 2009, EPA released provisional drinking water advisories for PFOA and PFOS (TY EPA!). We are collecting benchmarks for this emerging contaminant and will update soon.
		STATE Guidance Documents And Values
	Alabama: Risk-based Corrective Action		View	ARBCA Guidance Manual
		Alabama's RBCA values are outlined in Table 2-2 of its RBCA guidance.
	Alaska: Contaminated Sites Program		View	Table B1_Soil Levels
		Alaska distinguishes cleanup levels by zones (arctic vs non-arctic and depth). 18 AAC 75.341 has soil levels in Tables B1 and B2. Groundwater is in Table C of 18 AAC 75.345. If your chem is not listed, there are more options at the ADEC website.		Table B2_PHs in Soil
				To Table C - GW & SW Levels
	Alaska: Other Cleanup Levels		View	Screening Links
		This site has a list of the miscellaneous cleanup levels and methods for calculation under "Contaminant Screening and Establishing Cleanup Levels". Also other tech docs.
	Arizona: Soil Remediation Levels		View	AZ SRLs
		Arizona has residential and non-residential Soil Remediation Levels, per Title 18 Chapter 7. Appendix A has 2007-revised SRLS. Link to the right also has the 1997 SRLs in Appendix B. Go about 1/6 down the page to find the tables. TY MR!
	Arizona: Surface Water Levels		View	Surface Water Regulation
		Like the SRLs (soil), Arizona has new surface water standards, from 2009, buried in an admin order. We are looking for a pretty tables of the values. If you know of one, please let us know.
	Arizona: UST Standards		View	UST Tier 1 Standards
		Arizona DEQ has a tiered approach to standards. For the UST sites, there is guidance with Tier 1 Cleanup Standards in Table 6.1.2.a.
	Arkansas: EPA Region 6 Standards
		Arkansas DEQ's website states that DEQ considers EPA Region 6 MSLs as a screening tool. It is not clear if they now use the new RSLs which even Region 6 uses instead of the older MSLs.
	California: OEHHA Standards		View	PHGs
		From the CalEPA website, the Office of Environmental Health Hazard Assessment presents PHGs for water, Acute RELs for air, Chronic RELs for air. Also a link to Proposition 65; Safe Harbor Levels is included.		Acute RELs
				Chronic RELs
				Prop 65
	California: CHHSLs		View	CHHSL Guidance
		This draft has California Human Health Screening Levels (CHHSLs) for residential and industrial soil (Table 1) and even for soil gas (Table 2).
	California: Soil Screening Numbers		View	OEHHA Screening Document
		This draft OEHHA "Human-Exposure-Based Screening Numbers Developed to Aid Estimation of Cleanup Costs for Contaminated Soil" document has soil and soil gas screening numbers in Section 5 and Appendix B.
	California: San Francisco Board of Water Screening Levels		View	SF RBSLs
		Although not a state document, this is worth the look for anyone. The Application of Risk-Based Screening Levels and Decision Making To Sites With Impacted Soils And Groundwater is a Tier 1 type of document that gives not only typical soils and groundwater levels but also gives a bit more tailored groundwater standards than the MCLs. Updated May 2008.
	Colorado: Soil Evaluation Values		View	COL CSEVs
		The CDPHE published these CSEVs in July 2011. TY CA!
	Connecticut: Water Quality Standards		View	CT 2002 Water Standards
		The Department of Environmental Protection has 2002 water quality standards and is in the process of updating those in 2011.
	Connecticut: Remediation Standard Regulations (RSRs)		View	CT RSRs
		CT also has standard regulation values for soil (residential and industrial), groundwater and even surface water.
	Connecticut: Proposed Remediation Standard Regulations, Volatilization Criteria		View	Proposed Standards
		This proposed March 2003 document updates the volatilization criteria in the previous state RSRs guidance (see above). It uses more recent information and methods to supply new groundwater and soil vapor volatilization criteria to be used when determining indoor air values as well as presents revised target indoor air concentrations (Table 1). No word on finalization or revision dates. TY KB!
	Connecticut: Significant Environmental Hazard Condition Notification Thresholds		View	Table A - VOCs
		CDEP presents required reporting limits for various contaminants. Please note that these are not cleanup levels or even appropriate screening levels, but are included here for those dealing with potential releases. The levels for VOCs are in Table A, SVOCs are in Table B and inorganics are in Table C.		Table B - SVOCs
				Table C - Inorganics
	Delaware: Remediation Standards Guidance		View	DEL Guidance with Levels
		The Adobe document on this link takes a bit to load but has explanatory text which may be helpful to some. The values start on page 45.
	Florida: Soil Cleanup Target Levels		View	Table 2 - Soil Target Levels
		This Adobe document presents Contaminated Cleanup Target Levels for Florida (62-777) for soil in Table 2 and GW in Table 1. Also including page with links on guidance.		Table 1 - GW Target Levels
				Guidance Links
	Hawaii: Environmental Action Levels		View	EAL Main Page
		Hawaii Department of Health has EAL guidance which appears to build upon EPA RSLs and includes a variety of "end-use" levels for multiple media in their 2009 EAL guiance, Evaluation of Environmental Hazards at Sites with Contaminated Soil and Groundwater. EALs are presented in the Volume 1 document, in more detail in Appendix 1of the Volume 2 document, and also an excel sheet. In Vol 2-App 1: Tables A and B have soil levels, Table C has GW, soil gas, and indoor air levels based on vapor intrusion, Table D has GW and surface water levels, Table E for leaching, and, really interesting, are Tables F and G which present "gross contamination" action levels for soils and GW that may be impacted, isolated or otherwise just not typically accesed. HDOH also put out dioxin levels in June 2010 and cool "category" arsenic levels in October 2010.  TY RB!		Vol 1 Tables - pdf
				Vol 2 Appendix 1 Tables - pdf
				EAL 2009 Tables - Excel
				June 2010 Dioxin Levels
				Oct 2010 Arsenic Levels
	Idaho: Risk Evaluation Manual		View	Software and Initial DTLs
		Idaho is a state that once used company-developed software (was available for $17.95) similar to that which is required to buy in other states for hundreds of dollars. Beginning July 2004, it has developed a new approach, the REM, to address sites in the state. The approach includes FREE software (applause - see Editor's Note) to calculate risk-based target levels in addition to Initial Default Target Levels (IDTLs). The manual and software are free after a simple registration.
	Illinois: Risk-Based Cleanup Objectives		View	IL Title 35 TACO
		The Illinois Pollution Control Board has a tiered approach to corrective action objectives (with the cool name of TACO) as laid out in Title 35, Subtitle G, Chapter I, subchapter F of the Administrative Code. Title 35 also has standards for air and groundwater.		For Chems not in TACO
	Indiana: Risk Integrated System of Closure (RISC)		View	RISC Technical Guide
		The RISC Technical Guide, Appendix 1, updated in 2006, has the default Closure Tables and contains residential and industrial soil levels.
	Iowa: Statewide Standards for Soil and Groundwater		View	IA Statewide Standards
		Iowa's Land Recycling Program has standards for soil specific to residential, non-residential and restricted access land uses. Values are also flexible to differing depths (<2 ft., 2-10 ft., and > 10 ft.).
	Kansas: Risk-Based Standards		View	RSK 2010 Standards
		KDHE released the Risk-based Standards (RSK) Manual in 2003 for contaminated sites in Kansas. This is a tiered approach to addressing sites in a consistent manner. Updated in 2010.
	Kentucky: Petroleum Cleanup Standards		View	KY Petroleum Standards
		Petroleum Cleanup Section has values for BTEX, Total PAH, TPH, lead and Total Metals in Table B.
	Louisiana: Risk Evaluation/Corrective Action Program (RECAP)		View	Table 1 Screening Levels
		The Dept. of Environmental Quality's RECAP program has set minimum screening standards for soils and groundwater (Table 1). The DEQ also allows site management options (MO) in which higher levels for some sites may be allowed (Table 2).		Tables 2&3 - MO Standards
	Maine: Remedial Action Guidelines for Contaminated Soils		View	RAGS Levels in Excel
		This is from the DEP. Has actual values for soil and groundwater. Soil levels are also scenario-specific (even has a trespasser value).
	Maine: Maximum Exposure Guidelines (MEGs)		View	Maine 2011 MEGs
		These MEGs are for Maine's drinking water. Updated 2011.
	Maine: Oil Cleanup Guidelines		View	Oil Guidance with Tables
		Remediation Guidelines for Petroleum Contaminated Sites in Maine are risk-based guidelines for petroleum contaminated sites. Has tables of values.
	Maine: Ambient Air Levels		View	Maine Ambient Air Levels
		Maine Center for Disease Control’s Risk-based guidelines for ambient air. Referenced on DEP site so assumed DEP-approved.
	Maryland: Generic Numeric Cleanup Standards for Groundwater and Soil		View	MD Cleanup Guidance
		These standards were updated in June 2008. Table 1 has standards for soil and groundwater. Table 2 has standards for TPH.
	Massachusetts: Massachusetts Contingency Plan (MCP)		View	Table 1-GW Standards
		This plan provides soil standards for different combinations of soil (and groundwater) categories as presented here. The MA DEP also has a great list of acronyms for those totally confused by the alphabet soup of site cleanup.		Method 1 S-1 Standards
				Method 1 S-2 Standards
				Method 1 S-3 Standards
				Method 2 Standards
				Method 3 UCLs
	Michigan: Part 201/213 Cleanup Levels		View	Part 201/213 Levels
		Administrative Rule Part 201 provides Generic Cleanup Criteria for soil and groundwater for differing situations (direct exposure, protection of groundwater, inhalation, etc.). Also has the toxicity information for those who calculate their own in the Rule 752 table.  Rule Part 213 addressed risk-based screening levels for Tanks. The link to right takes you to a page that has the combined levels - Attachment 1, Tables 1 - 4.
	Minnesota: Soil Reference Values (SRVs)		View	MN SRVs
		The Voluntary Investigation and Cleanup Program (VCP) has draft guidance documents available. Appendix C presents the draft Tier 1 and Tier 2 SRVs for this program.
	Mississippi: Target Remediation Goals (TRGs)		View	MS TRGs
		The MS DEQ has developed risk evaluation procedures for voluntary cleanup and redevelopment of Brownfields. The guidance and Target Remediation Goals (TRGs) are in the link to the right. We have also included cleanup levels for underground storage tanks.		MS UST Levels
	Missouri: MRBCA Default Target Levels and RBTLs		View	MRBCA Levels Page
		Missouri Risk-Based Corrective Action (MRBCA) guidance provides a policy for remediation decisions at contaminated sites. Appendices have screening levels for sites including Default Target Levels, Tier 1 RBTLs, Building Surface levels, and Background levels in the Appendices. Go to bottom of page for links.
	Missouri: MRBCA For Tank Sites		View	MRBCA Tanks Guidance
		Missouri Risk-Based Corrective Action (MRBCA) for Tanks guidance provides a policy for remediation decisions at Tank sites. First link takes you to the main page for the guidance. Second link is to the soil type dependent Tier 1 risk-based target levels for Tank sites.		Tanks Tier 1 RBTLs
	Montana: Risk-Based Screening Levels (RBSLs)		View	MT UST Levels
		These Montana DEQ RBCA-based levels are for petroleum releases. There are RBSLs for differing depths to groundwater and land uses. The first link takes you to the list of Tier 1 tables including Table 1 (surface soil RBSLs), Table 2 (subsurface soil RBSLs), Table 3 (groundwater RBSLs) and Appendix C (master table of soil levels - recommended).
	Montana: Voluntary Cleanup and Redevelopment Act		View	MT VCRA Guidance
		The Montana VCRA allows cleanup to published and/or determined levels following a hierarchy presented in the 2002 Application Guide beginning on page 15. The hierarchy includes using RBSLs for petroleum releases (above), EPA Region 9 SSL values for migration of groundwater (cleach), EPA Region 9 PRGs for soil and air, background, Washington State and DOE levels for sediment, state's abandoned mine cleanup values (could not find online), and site-specific determined cleanup levels. This program has flexibility but readers are advised to read the guide (Section 5). Some numbers provided.		MT Vapor Level Calculator
				MT SW & GW Levels
				MT Background Soil Levels
	Nebraska: Risk-based Screening Levels		View	NE Tanks RBCA Guidance
		The Nebraska DEQ Leaking Underground Storage Tanks program has risk-based screening levels (RBSLs) starting on page 65 for petroleum-related constituents.
	New Hampshire: Risk Characterization and Management Policy		View	RCMP document
		This is the NHDES' Risk Characterization and Management Policy has values for groundwater and soil. The document also has some background levels for metals in NH. Be sure to use the 04/2001 revised values. Takes time to open this one. TY Denise!
	New Jersey: Soil Cleanup Criteria		View	NJ Soil Criteria
		This is the NJ DEP Site Remediation Program's soil cleanup criteria. Includes residential and industrial levels, as well as protection of groundwater levels.
	New Mexico: Soil Screening Levels (SSLs)		View	NM Guidance Page
		The NM Environmental Department's 2000 Soil Screening Guidelines used to include screening levels for residential, industrial and construction land uses/receptors. The state's link to the 2006 guidance does not work. The first link is to the guidance page. NM also uses EPA Region 6 MSLs. Also including link to October 2006 TPH benchmarks.		TPH Benchmarks
				Region 6 MSLs
	New York: Soil Cleanup Objectives and Water Standards		View	NY Soil Cleanup Objectives
		Part 703 contains surface water and groundwater standards. Subpart 375-6 has Remedial Program Soil Cleanup Objectives for soil, protection of groundwater, and protection of ecological endpoints.		NY Water Standards
	North Carolina: Screening Levels for Inactive Sites		View	NC SRG Levels for Soil
		In August 2010, NCDE's Inactive Hazardous Sites Branch released giudance for Registered Environmental Consultant Program which presents guidance on overseeing sites including screening levels in Appendix D. For Soil Remediation Goals (SRGs); modifications to the values can be made. For groundwater, levels are in the original regulation 15A NCAC and in Interim Maximum Allowable Concentrations (IMACs) document. For upgradient sediment, use soil SRGs. For downgradient, use EPA Region 4 Eco levels. Also has residential and industrial Vapor Intrusion screening levels. Note: Levels may be change in the next year; for latest levels, go to NC's Superfund Page.		NC 15A NCAC GW Levels
				NC Interim GW IMAC Levels
				EPA Region 4 Eco Values Page
				NC Residential VI Levels
				NC Industrial VI Levels
				NC's Superfund Page
	North Dakota: Cleanup Action Level Guidelines for Gasoline and Other Petroleum Hydrocarbons		View	ND UST Levels
		These are released by the North Dakota Department of Health. Gives a benzene and TPH value for soils.
	Ohio: Uses EPA RSLs		View	OH Memo on Using EPA RSLs
		The Ohio EPA has stated that EPA RSLs can be used for carcinogens and 1/10 the EPA RSL for noncarcinogens (excluding lead) for Ohio EPA, DERR Remedial Response Program and Federal Facilities Section sites.
	Oregon: Risk-Based Concentrations		View	RBDM Table
		Oregon’s Department of Environmental Quality published RBCs to go with its Risk-Based Decision Making (RBDM) for the Remediation of Petroleum-Contaminated Sites. Kudos to OR for offering levels that address vapor intrusion into buildings.
	Pennsylvania: Medium Specific Concentrations (MSCs)		View	PA Health Standards
		The Department of Environmental Protection has new MSCs for soil and groundwater released in January 2011. Also, has ecological values and defaults for calculating lead values. The link takes you to a list of tables (excel or pdf) for all the "Statewide Health Standards". TY Mark!
	Rhode Island: Metals Background Levels		View	RI Background Metals
		An older document with background levels for metals in Rhode Island.
	South Carolina: Risk-Based Corrective Action for Tanks		View	SC Tanks RBCA Guidance
		South Carolina has the May 2001 Risk-based Corrective Action for Petroleum Releases guidance. Levels are in Appendix B.
	South Dakota: Look-Up Tables		View	SD Lookup Tables
		The SD Department of Environment & Natural Resources has look-up tables including a table for BTEX, naphthalene and MTBK in surface soils and GW in near proximity to PVC lines.
	Tennessee: Cleanup Criteria for Petroleum Contaminated Sites		View	TN-RBCA Levels in Excel
		At the end of 2004, the Division implemented a new Risk Based Corrective Action (TN-RBCA) Process for UST sites. Levels are in the linked excel file.
	Texas: Protective Concentration Levels (PCLs)		View	TX PCLs
		The TRRP Tier 1 protective concentration levels (PCLs) are the default cleanup standards in the Texas Risk Reduction Program. Updated regularly.
	Utah: Screening Levels for UST Sites		View	UT 2005 Screening Levels
		Cleanup screening level information BTEX and TPH in soil and groundwater samples dated November 1, 2005; became effective May 15, 2006 (updated 5/16/2006). TY Mark!
	Utah: RCLs for UST Sites		View	UT 1990 Memo and RCLs
		This memo includes the 1990 document showing Utah's guidelines for the older Recommended Soil Cleanup Levels (RCLs) related to Underground Storage Tanks. Presents levels for TPH and BTEX. Numbers are for gasoline constituents and a little hard to find: go to the end of the document to Tables 10 thru 12.
	Virginia: Voluntary Remediation Program Risk Assessment Guidance		View	VA Tables
		Virginia's Department of Environmental Quality has a tiered procedure similar to other states. They have Excel tables with information on toxicity, exposure factors, etc. to use in your calculations. They also have tables for soil levels (residential - vrp25.xls, industrial - vrp29.xls), groundwater values, and some surface water info. Link is to the complete list of tables.
	Washington: CLARC Search Engine		View	CLARC Engine
		The Cleanup Levels and Risk Calculation (CLARC) tool is a searchable database developed and maintained by the Washington State Department of Ecology (Ecology). Enter in the chemical and parameters and it generates the screening level. GO to GUIDANCE at top of page and click the media of interest.		Metals Background Levels
	Washington: WAC Soil Cleanup Levels		View	Table 740-1 Unrestricted Soils
		Here are links to the WAC cleanup levels for soil and groundwater at unrestricted land use sites (Table 740-1) and industrial land use sites (Table 720-1).		Table 720-1 Industrial Soil
	Washington: Site-specific Levels for Former Dupont Works		View	DuPont Site SRLs
		From the "Human Health and Ecological Risk Assessment for the Former DuPont Works Site", this is Appendix E – Soil Cleanup Level and Remediation Level Calculations. These are for this site only but can provide an example for project managers.
	West Virginia: Voluntary Remediation Levels			Table 60-3B
		The WV Voluntary Remediation Rule presents soil, groundwater, and leaching levels in Table 60-3B (end of linked document). Looking for link to Redevelopment Act's tiered approach levels, formerly Appendix C-1.
	Wisconsin: Remediation Levels		View	NR746 Document
		The WI DNR has some regulations with actual remediation values in Chapter NR746. For residual petroleum in soils, see Tables 1 and 2 of 746.06, available in the full NR746 document in pdf form or in the online outline which seems to have a couple more values listed.  For generic soil levels, see NR720.09(4). For groundwater standards, see Tables 1 and 2 of the NR140 document (pdf or outline). For guidance on conducting site-specific standards, see NR720.		746.06 Screening Criteria
				NR 720 - Soil Levels
				NR 140 - GW Levels
	Wyoming: Cleanup Levels Under the Voluntary Remediation Program		View	Combined Cleanup Table
		The Voluntary Remediation Program has a combined (soil, groundwater, leaching) levels table. Fact Sheet #12 has TPH levels for soil and groundwater. Also, hierarchy on GW levels is presented in Fact Sheet #13.		TPH Cleanup Levels
				Fact Sheet on GW Levels
		INTERNATIONAL Guidance Documents And Values
	Australia: Health-Based Guidelines		View	Australia HILs
		Health-based soil investigation levels (HILs) are included in Appendix 1 of this guidance document; go to end of each substance paragraph.
	Canada: Canada-Wide Standards		View	Canada-Wide Standards
		Canada-wide Standards (CWSs) are intergovernmental qualitative or quantitative standards, guidelines, objectives and criteria for protecting the environment and reducing risks to human health.
	Canada: Canada-Wide Standards for Petroleum Hydrocarbons in Soil		View	CWSs for PHC
		Canada-wide Standards (CWSs) for petroleum hydrocarbons in soil.
	Netherlands: Dutch Intervention Values		View	Dutch Values
		The Dutch Intervention Values are widely used throughout Europe. Was initially known as the "ABC List" but now modified to the New Dutch List. Presented in Here is the Annex A of the 2009 Soil Remediation Circular: "Target Values, Soil Remediation Intervention Values and Indicative Levels for Serious Contamination".
	UK: CLEA Values and Software		View	CLEA Docs and SGVs
		Contaminated Land Exposure Assessment (CLEA) presents the CLEA model, software, Health Criteria Values (TOX reports) and the Soil Guideline Values (SGVs). This replaces the older ICRCL values as available. SGVs are at the bottom of the page.		CLEA Software
	UK: ICRCL Values		View	ICRCL Values
		The Interdepartmental Committee on the Redevelopment of Contaminated Land (ICRCL) published the Guidance Note 59/83 in 1983 and updated in 1987(2nd edition). It set out a number of Trigger Values (threshold and action concentrations) for contaminants in soil including ten metals, cyanides, sulphates, PAHs and phenols. Outdated by the CLEA numbers now.
	UK: Kelly Indices - Gasworks Values		View	Kelly Indices
		Kelly Indices (Former GLC) Guidelines for Contaminated Soils is specifically developed for gasworks sites in London.
		Other Stuff
	GO	EPA Soil Screening Guidance's Attachment C: Radiological Chemical Specific Parameters.
	GO	ATSDR's obtained values for drinking water and air. They also have their own dose levels termed Minimum Risk Levels (MRLs).
	GO	Integrated Risk Information System (IRIS): This is the ultimate source for all your toxicity value needs (well most of them).
	GO	Environmental Health Information.
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