^3^2. Interim Guidelines for the Remediation of Petroleum Contamination at Operating Retail and Private Fuel Outlets in Ontario Report of the Petroleum Contaminated Soils Working Group January 20, 1992 (Revised March 5, 1992) Hazardous Contaminants Branch Ontario Ministry of the Environment APPENDIX C: Membership ofthe Petroleum Contaminated Soils Working Group RichardAucoin (Chair) FrankCrossley EnvironmentalToxicologist Senior Hydrogeologist Standards Development Section SoutheastRegion Hazardous Contaminants Branch Ontario Ministryofthe En\ironment Ontario Ministryofthe Environment KingstonRegional Office 135St. ClairAve.W., 133DaltonAve., Kingston Toronto, Ontario M4V 1P5 Ontario K7L4X6 Lynn CalderStarr Lynn Kergan Advisor, HydrogeologyandSoils Senior Environmental Officer Shell Canada ProductsLimited West Central Region L500 Don Mills Rd., Ontario Ministryofthe Environment Don Mills, Ontario M3B 3K4 Hamilton Regional Office 119 KingSt.W., 12th Floor Hamilton, Ontario L8N 3Z9 Christopher Hay Supervisor,Site Remediation Esso Petroleum Canada Inc., GaylcSooChan P.O. Box4006,Terminal A Coordinator, Groundwater Quality Toronto, Ontario M5W 2J8 DrinkingWaterSection Water Resources Branch Ontario Ministryofthe Environment Michael Osborne 1 St. ClairAve.W., 3rd Floor Hydrogeologist, Environmental Toronto, Ontario M4V 1K6 Retail Support Petro-Canada Ltd. 5140 YongeSt.,Suile 200 Al Kuja North York, Ontario M2N6L6 Coordinator,Terrestrial Standards Environmental Regulation Support Unit PhytotoxicologySection Darryl Hogg Air Resources Branch District Officer -Toronto East Ontario Ministryofthe Environment Central Region 880 BaySt., 3rd Floor Ontario Ministryofthe Environment Toronto, Ontario M5S 1Z8 7 Overlea Blvd., 4th Floor Toronto, Ontario M4H 1A8 IvyJung (secretary) Assistant Environmental Scientist John Gerdels HazardousContaminants Branch Standards Engineer Ontario Ministryofthe Environment Fuels Safety Branch 135St. ClairAve.W., Ontario Ministry of Consumer and Commercial Toronto, Ontario M4V 1P5 Relations 3300 Bloor St.W., 4th Floor, Etobicoke, Oittario M8X 2X4 CONTENTS 1.0 Purpose 2 2.0 Background and Approach 2 3.0 Constituents of Petroleum Products 3 4.0 Indicator Compounds 3 5.0 Review of Other Jurisdictions Criteria 5 5.1 Canada 5 5.2 United States .6 6.0 Selection of Soils Criteria for Ontario and Rationale 7 6.1 Site Sensitivity 7 6.2 Soil Remediation Criteria 9 6.3 Rationale for Soils Criteria 9 7.0 Groundwater 10 . 8.0 Minimum Generic Guidelines 11 9.0 Site Specific Risk Assessments 11 1Ô.0 Site Investigation Requirements 11 10.1 Information Requirements 12 10.2 Use of Combustible Vapour Measurements 13 11.0 Additional Guidelines 13 12.0 Feedback .' 13 APPENDICES Appendix A: Soil and Groundwater Criteria Used in Selected Jurisdictions •• . 14 Appendix B: Typical Hydraulic Conductivities of Subsurface Materials 27 Appendix C: Membership Of the Petroleum Contaminated Soils Working Group 28 Z 36ed 201-SllV IntérimGuidelinesforPetroicuniConiaminatedSilcs,page2 1.0 Purposie Thepurposeoftheseguidelinesistoprovide interimclean-upcriteria forsitescontaminated by petroleum products (primarily gasoline, diesel, and fuel and waste oils) released from underground storage tanks (USTs) or lines/pumps at commercial sites. The guidelines specifically refer to on-site contamination at operating retail and private fuel outlets (excluding refineries and petrochemical plants) where no change in land use is intended. 2.0 Background and Approach On-site inspection and remediationofspills, leaks,andreleasesofpetroleumproductsisthe responsibility of the Fuels Safety Branch of the Ministry of Consumer and Commercial Relations (MCCR). Under a working agreement, the Ministry of the Environment (MOE), provides MCCR with advice and recommendations with respect to on-site aswell as off-site remediation where its primary responsibility lies. Currently in Ontario clean-up criteria are applied on a somewhat ad hoc basis and there is an urgent need for consistent guideHnes throughout the various regions of the province. Accordingly, in October of 1991, a meeting was organized by R. Hore (Director, NE Region, MOE) and I. Wile (Director, Hazardous Contaminants Branch, MOE) which included representatives of the Canadian Petroleum Products Institute (CPPI) and other Ministry staff. It was agreed that a Working Group composed of representatives from CPPI and Ministry branches and regions be established to examine what options were available with respect to development of new or adoption of existing guidelines. It was envisaged that the interim guidelines would be valid until other Ministr\'initiatives, inparticular the MaterialsPolicyCommittee,woulddevelopandprovide more long-term soils criteria. Given the urgent need for guidelines and their propo.sed interim nature, it was not felt to be practical to develop new criteria but rather the approach would involve examining existing criteria of other jurisdictions to see if they could in some way be adopted for use in Ontario. The approach used by the Working Group to select interim guidelines involved a number of specific tasks: • A review of the constituents of petroleum products in Ontario. • A review and selection of the most appropriate indicator compounds. • An examination of current practices in Ontario. • An examination of the protocols and criteria used in other jurisdictions to manage petroleum contaminated soils and their rationale. • Selection and recommendation of the most practical option for Ontario by January, 1992. InterimGuidelinesforPetroleumContaminatedSites,page3 3.0 Constituents ofPetroleum Products in Ontario Gasolineanddieselfuels arecomplexmixtures ofhydrocarbonswith dieselcontainingmore of the heavier hydrocarbons. Both fuels may contain up to 50% aromatics with the remainderprimarily composed ofparaffins, napthenes, and olefins. The most important of these aromaticsfrom atoxicological pointofviewarebelieved tobe the BTEXcompounds: benzene, toluene, ethylbenzene, and xylenes which together may constitute up to 30% by weight. Of additional concern are phenols, PAHs such as napthalene, and numerous additivessuchasMMT(methylcyclopentadienylmanganesetricarbonyl)andMTBE(methyl- tert-butyl ether). The latter additive has received considerable regulatory interest in the United States and has just recently been introduced into some Ontario fuels. Information on the nature and proportions ofmost additives is not available for proprietaryreasons. An analysis of several Ontario gasolines by the Alberta Research Council in 1989 (conducted for CPPI) revealed the following proportions of BTEX components: Table 1: BTEX Composition of Gasoline