SITE INFORMATION AND CORRESPONDENCE 1991-1992

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1 yy -Elul (7-1-91 Edition) Environmental Protection Agency §761.125 graphs (c)(2)(i) (iii) At the option of the responsible option pose special concerns at that n. Conformance Party, low-contact, indoor, nonimper- site. That is, the Regional Administra- xds under para- vious surfaces will be cleaned either to for would not permit encapsulation if ,) of this section 10 µg/100 Cm' or to 100 µg/100 cm' he/she determined that if the encap. '} )stcleanup saw- and encapsulated- The Regional Ad- sulation failed the failure would create :3'• ler y 761.130. At ministrator, however, retains the au- an imminent hazard at the site. r electrical sub- thority to disallow the encapsulation (v) Soil -contaminated by the spill `1 to another use, option for a particular spill situation will be decontaminated to 10 ppm '.leaned up to the upon finding that the uncertainties as- PCBs by weight provided that soil is •. requirements sociated with that option pose special excavated to a minimum depth of 10 J of this section. concerns at that site. That is, the Re- inches. The excavated soil will be re- solid surfaces gional Administrator would not permit placed with clean soil, i.e., containing non-impervious) encapsulation if he/she determined less than 1 ppm PCBs, and the spill PCB cencentm- that if the encapsulation failed the site will be restored (e.g., replacement grams (µg)/100 failure would create an imminent of turf). n') (as measured hazard at the site. (5) Records. The responsible party - 0 (iv) Low-contact, -outdoor surfaces shall document the cleanup with [ the responsible (both impervious and nonimpervious) records of decontamination The ted by the spill shall be cleaned to 100µg/loo CM2. records must be maintained for a to 25 ppm PCBs (v) Soil contaminated by the spill period of 5 years. The records and cer- i ppm PCBs by will be cleaned to 25 ppm PCBs by tification shall consist of the follow- is weight. (ng; a label or notice (4) Requirements for decontaminat- (i)Identification of the source of the the area Upon ing spills in nonrestricted access spill,e.g.,type of equipment. the responsible areas. Spills which occur in nonres- (ii) Fstimated or actual date and .o 25 ppm or 50 I tricted access locations, as defined time of the spill occurrence. the integrity of under 4 761.123, shall be decontami- (iii) The date and time cleanup was `F >nt at the substa- nated in accordance with paragraphs completed or terminated (if cleanup g al office may es- (c)(4)(i) through (v) of this section. was delayed by emergency or adverse e cleanup method Conformance to the cleanup standards weather,. the nature and duration of the responsible at paragraphs (c)(4Xi) through (v) of the delay). y timely schedule this section shall be verified by post- (iv) A brief description of the spill roup• im cleanup sampling as specified under location and the nature of the ateri- or decontaminat- §761.130. als contaminated. This information restricted access (i) Pyrnishings toys, and other should include whether the spill oc- ccur in restrictedeasily replaceable household items curred in an outdoor electrical substa- er than outdoor shall be disposed of In accordance with tion, other restricted access location, =+ ,as defined under the provisions of 1761.60 and replaced or in a nonrestricted access area. econtaminated in by the responsible party. (v)Precleanup sampling data used to agraphs (cX3) (1) (ii) Indoor solid surfaces and high- establish the spill boundaries if re- section. Conform- contact outdoor solid surfaces, defined quired because of insufficient visible standards in Para- as high contact residential/commer- traces and a brief description of the _ --ough (v) of this cial surfaces under 3 761.123, shall be sampling methodology used to estab- erified by post- cleaned to 10 µg/100 cmx (as measured lish the spill boundaries. s specified under by standard wipe tests). (vi) A brief description of the solid Imes as restricted Oil) Indoor vault areas and low-con- surfaces cleaned. ban outdoor elec- tact, outdoor, impervious solid sur- (vii) Approximate depth of soil exca- converted to an- faces shall be decontaminated to 10 vation and the amount of soil re- Ul site shall be µg/100 cm=. moved. . mr'estr•icted seem Uv) At the option of the responsible (viii) Postcleanup verification sam- f paragraph (eX4) party, low-contact, outdoor,nonimper- pling data and, if not otherwise appar- vious solid surfaces shall be either ent from the documentation, a brief lid surfaces,as de- cleaned to 10 µg/100 cm' or cleaned to description of the sampling methodol- 3 shall be cleaned 100 µg/100 cm2 and encapsulated. The ogy and analytical technique used (as measured by Regional Admin trator, however, re- (ix) While not required for compll- tains the authority to disallow the en- ance with this policy, information on. I ndoor, Impervious capsulation option for a particular the estimated cost of cleanup(by man. )e decontaminated spill situation upon finding that the hours, dollars, or both) would be uncertainties associated with that useful if maintained in the records. L 403 I