&EPA $!•<•• Envtronm«nui Protection Solid W||i« tno DIRECTIVE NUMBER: 9480.03(85) TITLE: Technical Justification for Closure Within 30 Days of Last Receipt of Hazardous Waste APPROVAL DATE: 8-2-85 EFFECTIVE DATE: 8-2-85 ORIGINATING OFFICE: office of solid waste Q FINAL D DRAFT STATUS: [ 1 A- Pending OMB approval B- Pending AA-OSWER approval C- For review &/or comment D- In development or circulating REFERENCE (other documtnu): headquarters DIRECTIVE DIRECTIVE L ------- PARTS 264—265 TSDF TECHNICAL REQUIREMENTS DOC: 9480.03(85) Key Words: Closure, Final Cover Regulations: 40 CFR 264.221, 264.251, 264.301 Subject: Technical Justification for Closure Within 30 Days of Last Receipt of Hazardous Waste Addressee: R. Kent Anderson, Land Disposal Branch Originator: Susan Hughes, EPA Specialist, Financial and Assessment Branch Source Doc: 9480.03(85) Date: 8—2—85 Summary: This memo describes design and operating standards required to minimze the formation and migration of leachate to adjacent subsurface soil ground water or surface water. The memo also addresses reglatory provisions for waivers from the liner nd leachate collection and removal requirements; no waivers exist for the closure provisions. ------- 9480.03 (85) E- 2ig TechnicaL Justification for Closure hithin 30 Days of Last. Receipt o Easardoua Waste R. Kent árson Land Disposal Branch (W}1—565E) Susan Hughes, EPA Special is t rinancia]. and Assessment Branch (WH—562a) I was able to find very little time specific information to support the above, however the following may be helpful. - Tb. hazardoue waste reguLations are based on a two—part ‘pr.v.ntion and care system who’s overall goal is to minimize th. formation and migration of leachate to the adjacent subeurfac soil. gro ind water, or surface water. The regulatory goal of minimizing the formation and migration of Leachat. is achieved through th. design and operating standards that require the use of (I.) a lin.r that is designed and installed to prevent any migration of waste out of th. unit to the adjacent subsurface soil or ground water or surfac, water throughout the active lif, of the unit7 (2) th. installation of leachate collection and rencvsl systems and run—cc controls for waste pile, and landfills, and the removal or solidification of wastes and waste re .i4uea at closure for surface impoundments7 and (3) the place’nent of a final cover (cep) placed on top to minimize the p•rcoi t.ion of liquid.. ih -to the unit. EPA is relying prinicipally on c e final cover (cap) rather than the bottom liner to provide pcst-closure protection of ground watsr. Whit. the regulations contained provisions for waivers from. the liner a isachat. eoll•ction and removal requirements, no such provisions were allowed for the closure provisions. The reasons being that aside from ground—water protection, the final v.ra2w,. (a) prevents the bathtub effect (i.e., filling vi b 1.achat. and overilcwing)7 (b) protection of surface water\ 119r ru* —offz ant’ (c) discouragement of direct access to the waz e. I. to the July 26, 1982, Federal Register , .Voi. 47 ,\ - .43,pp 32312—32316. H —S65 z1ent.An4erson:pin:S2o6 : 382—4654:WSM:8/2/85 ------- Unrt Stat.a Office of £nvIrovrn .nijI Pyoi.ctiofl So u Waits a EtIierQ.r cy Rea ons. DIRECTIVE NUMBER: 9480.03(85) TITLE: Technical Justification for Closure Within 30 Days of Last Receipt of.Hazardous Waste APPROVAL DATE: 8285 EFFECTIVE DATE: 8285 ORIGINATING OFFICE: Office of Solid Waste FINAL O DRAFT A— Pending O approval STATUS: - [ ] B— Pending AA-OSWER approval C— For review &/or co=ent - [ ] - D— In development or circulating REFERENCE (other documants): headquarters fl ibc DIRECTIVE b(flE; CT1VE £ ------- PARTS 264—265 TSDF TECHNICAL REQUIRE NTS DCC: 9480.03(85) Key Words: Closure, Final Cover Regulations: 40 CFR 264.221, 264.251, 264.301 Subject: Technical Justification for Closure Within 30 Days of Last Receipt of Hazardous Waste Addressee: R. Kent Anderson, Land Disposal Branch Originator: Susan Hughes, EPA Specialist, Financial and Assessment Branch Source Doe: 9480.03(85) Date: 8—2—85 Summary: This memo describes design and operating standards required to rninimze the formation and migration of leachate to adjacent subsurface soil ground water or surface water. The memo also addresses reglatory provisions for waivers from the Liner and Leachate collection and removal requirements; no waivers exist for the closure provisions. ------- 9’ 8O.O3 ( 35) 2Ls T chniCa1 uitification for Closure ,ithin 30 Days of Last Receipt o azardoue Waste R. ! nt raon Land Dispo*mi. Branch (WH—565E) Susan aughes EPA Specialist linanc.ial and Assessment Branch (WH—562 ) I was able to find very little time specifLc nfor to support the above, however the following ay be helpful. The hazardous waste regulations are based on a two—part prevention and caxe system who’s overall goal La to ninim z. the formaticn and migration of Leachate to the ad)acent subeurfac. soil. grnund water, or surface water. The regulatory goal . of einin.tziziq the formation and migration of leachate is achieved through the design and operating standards that require the use of (1) a liner that. is designed and installed to prevent any migration of vsIt• out of the unit to the adjacent subsurface soil or ground water or surface water throughout the active life of the un .t; (2) tha installation of leachate collection and re val system.. and run—oa controls for waste piles and landfills, and the re val or solidification of wastes and waste residues at closure for surface impoundments; and (3) the placeaent. of a final cover (cap) placed on tap to nu nim. ze the percoi. zion of U.quids into th. unit. EP& is relying prinicipally on c.-ie final cover (cap) rather than the bottom liner to provide pcst-closure protection of gr nd water. imii.a the rsçnlationa contained provis ona for waivers fr the liner a. leachate eoll.cticn and r.oval requirements, no -s’zch pra isions were eii.owed for the closure prov sions. The reasons being that said. froa ground—water protection, the fine]. v.xaJse,. (a) prevents the bathtub effect (i .e., fLIling vi 1sechat and ov.rilowing)r (b) protection of surface water 1r rua —otf 1 an* (c) discouragement of direct access v.o the waste. W 74r J s I. to the July 24, 1982, Federal. Register , •Vol. 47 143, pp 32312—32316. WR—56SX .nt:An4e rson:pm:S2O6 : 382—4654:WSZI:8/2/85 ------- |