SITE INFORMATION AND CORRESPONDENCE_1992

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Detroleum Contaminated Soil -2- 15 ,Auaust 1986 • DHS Nillina to grant variance so that the soil may be managed as non-nazardous, (see 8 October 1985 letter from Bill Ouan. Alternative 7ecnnoiogy aria Policy Deveiopment Section, attached). May be classified as designated waste depending on site-specific determination of threat to water quality. • Biological treatment required to degrade heavier fractions. • Management Options include landfarminq + aeration (air-strippinq), use as road base, landfilling (Class ! or Class 11), or use in foundation -laverfor Ciass . 11 landfill %,na/ cover. Landfarming and aeration methods must orevent contaminants from entering surface waters. ._eadea Ga=_o!in? - • Contains organic lead compounds, ethylene dibromide (EDB) or ethylene :ichloride, BTX, and Other petroleum hydrocarbons. • Organic !e3a compounds it concentrations greater than 17 mg/kq -ose a safety nazard to workers and cause waste to be classified as hazar-aous' by DHS. Jther volatile compounds such as EDB can also pose hazards to worker=_ • Class i disposal required if organic lead exceeds 13 mgg/kg; Class 11 or Class I disposal, landfarminq, or aeration if below 13 mglkg. Landfarminq and aeration methods must prevent contaminants from entering surface waters. Diesel Fuel and Unleaded Gasoline - • Contains BTX and other petroleum hydrocarbons. • DH5 usually does not require management as hazardous waste. Classified as liesignated waste' if determined to pose a threat to water quality gt t116 site 0r P5ch3r0e • Management options, if determined to be 'designated waste', include Landfarming, aeration, in-place soil venting and biodegradation, and landfilling, Landfarming and aeration methods must prevent contaminants from enterinq surface waters. Landfilling would require Class II or Class I containment and is the least preferable option due to limited landfill space. Legal and Other Constraints: Certain legal and practical constraints may limit the available management Options. • Jn-s/te !andfarmind and aeration may begiven a variance from Subcnapter 15 under 5 2511 (4). Once soil is removed from the immediate site of the spill or release, no exemption is permissible. Off-sitelandfarmina and/or aeration must comply with requirements of a Class 11 land treatment .snit unless it can be shown that the soil does not pose a threat to water quality at the _site Of,oroo0sed tr-eatme0t • Reuse of contaminated soils may be given a variance from Subchapter 15 .ender 5 251 1(,h). Care should be taken that the reuse does not amount to disposal and does not threaten water quality.