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EPA memo re: asbestos assessment and Superfund advantages, Jan 2002

Machine-extracted title · confidence 100%

Memorandum comparing asbestos data in Manhattan to other sites and arguing for cleanup under the Superfund statute.

NYC-WTC_000140235–000140258

Folder label: “EPA Cate Jenkins

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NYC 9/11 Public Portal Document

THICK WTC FALLOUT DUST DEPOSITS OUTDOORS weight percent (%) (all asbestos included, not MANHATTAN just PCM-equivalent Includes all asbestos, not just fibers longer than 5 micrometers asbestos)

Ground Zero Task Force Study,*'' data from Table 22. Analyses by gravimetric matrix reduction (American Society for Testing and Materials ASTM STP 1342) followed by PLM analyses of larger fractions and TEM measurement of fine portion of samples

Roof of automobile, Church St. south of Duane St. 0.67 %

45 Warren St., roof, outside Sth floor loft, gaps in stone floor 1.05 %

250 South End Ave,, Apartment 11D, exterior window ledge 2.25%

250 South End Ave., ground level courtyard, top of wall 2.05 %

HP Environmental Study, Table 5.*’ PLM analyses.

#1 - Barkley St west of Church < 0.25 % #2 - Barkley St between Broadway and Church ND

#3 - Barkely and Greenwich ND

#4 - Barkey between Greenwich and Joe Dimaggio Hwy ND #5 -Barkely at Joe Dimaggio Hwy 0.5 % #6 - Warren and Church <0.25 %

#7 - Murray near Broadway 0.75% #8 - Murray and Greenwich ND

#9 - Chambers between Broadway and Greenwich ND

#10 - Murray between Greenwich and Joe Dimaggio 0.75 % #11 - Warren between Greenwich and Joe Dimaggio 0.75 % EPA data on bulk dusts taken outside buildings in Manhattan.*’ All the analyses performed EPA for Manhattan used the less sensitive PLM method. EPA did not fraction the sample and use electron microscopy techniques in addition to PLM as did the Ground Zero Task Force study above. EPA in its risk assessment for Libby, however, noted that soil samples showing non-detectable asbestos by PLM alone actually had high levels when analyzed by scanning electron microscope (SEM) methods.**

48 of 177 dust samples 1 -4.46%

129 dust samples ND

-17-

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NYC-WTC_000140251Source: NYC Law Department, mirrored locally

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