2002 E-Mail Sent M. Gilsenan

NYC 9/11 Public Portal Document ‘1

The next conference call of the COC/Benchmarks Committee is scheduled fdr Monday March 18, from 2 - 4 pm (I extended the time to 4 pm because I'm hearing that we need to move with all due expediency). The call in number is (202) 260-1015 Access Code 4603#

Summary and Action Items from 3/11 Conference Call

Progress was made on Consolidating the COC list. PCBs and TSP are likely out, but we need to add mold to the list (Chris D. I know you're a mold man, so could use take a crack at putting together a tiered benchmark paradigm for our green friends consistent with the approach that's detailed below.)

There was some discussion about linking the COC list to geographic zones (i.e., proximity to Ground Zero).

NYCHOH will collect and review NYCDEP indoor sampling data to further delineate the COC lisf.

A strawman benchmark table (see below) will be presented demonstrating the tiered approach for indoor assessment.

Proposed Approach for Establishing Health-Based Benchmark Values

------ + + I Tier | Screening Value I Action

+ +-------------------- 1 I I > E-04 (1'yr) or HQ = 10 1 aggressive cleaning

(professional?) - if

readings persist take

additional action to reduce

exposure ---------------------------- 1 II background or E-04 (30 maintain recommended (i.e..

yr)/HQ =1’to E-04 (1 yr)/HQ diligent wet/HEPA) cleaning

= 10 methods - consider

I additional monitoring ----- +------------------------- +------------------ III I < background or E-04 (30 I no further action

I yr)/HQ = 1

* Example (dioxin in air)

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