NYC DEP fax transmission journal, March 24, 2003

NYC 9/11 Public Portal Document

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From: [email protected] Sent: Thursday, March 20, 2003 1:42 PM To: Theodorellys, Penny Cc: Radhakrishnan, Krish; Gilsenan, Michael; Callahan.Kathy©epamail.epa.gov Subject: Re: FW: Dioxin Wipe results

R03030259 Cover R03030259 excel Letter.pdf Report xis

Penny,

I looked at the dioxin data that you forwarded to me and I have a few questions. The first is that I do not see the TEQ calculations that were detailed in Attachment 2 of the workplan (see below). The second is that the TEQs, when presented, should be reported in the units of ng/m2 (alternatively, the TEQs could be reported in pg as long as someone provides the template area that was sampled so that I could add a row to the spreadsheet and calculate it myself). Without the TEQ calculations, it is not possible to compare the results to the health-based benchmark. 7 of 7 2/7/03 Attachment 2: Reporting Dioxin Sampling Results

1. The laboratory shall submit sample results in tabular format on the laboratory's letterhead. The date of sample collection, the matrix (e.g. wipe), and date analyzed must be printed on each page of the report. The table must contain, at a minimum, columns with the following headings and information. § Sample Identification Number § Analytical Method § Analyte § Result (including units) § Detection Limit § EMPC § Laboratory Flags § Standard Type § Dilution Factor § Recovery Limits § TEF, max TEF § # Isomers

2. Analytical results shall be reported using a 2,3,7,8 -TCDD

NYC-WTC 000101232