EPA technical review of dioxin laboratory results identifying missing TEQ calculations and requesting proper reporting units and health-based benchmark comparisons.
NYC-WTC_000155231–000155242Folder label: “114 LIBERTY 1 OF 2”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
. Gilsenan, Michael From: [email protected] Sent: Thursday. March 20, 2003 1:42 PM To: Theodorellys, Penny Co: Radhakrishnan, Krish; Gilsenan, Michael; [email protected] Subject: Re: FW: Dioxin Wipe results
B1 R03030259 Cover R03030259 excel Letter.pdf Repoit.xls
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 toxicity equivalence (TEQ). The TEQs shall be reported four ways. A TEQ which sets non-detects to zero (i.e., TEQ (ND=0), a TEQ which sets non-detects at 1/2 the detection limit (i.e., TEQ (ND=l/2), a TEQ Estimated Maximum Potential Concentration with non-detects set to zero (i.e., TEQ EMPC (ND=0), and a TEQ Estimated Maximum Potential Concentration with non-detects set to 1/2 the detection limit (i.e., TEQ EMPC (ND=l/2). Thanks, Chuck Nace Environmental Toxicologist USEPA - Region 2 1
NYC-WTC_000155231
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NYC-WTC_000155246
Environmental laboratory analysis results for 114 Liberty contamination testing, covering asbestos, lead, and PAH from post-WTC dust.
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Cover page for a Federal Emergency Management Agency transmission concerning the recovery efforts at 114 Liberty Street.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000101235
Chain of custody correspondence for dioxin wipe sample analysis results from PSC Analytical Services, March 2003.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000100952
Administrative document serving as a section header or index for the JLC Environmental reports collection.
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Laboratory order form for analyzing airborne crystalline silica samples collected from 114 Liberty Street.
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000163562
Resident request for a government letter requiring the landlord to seal firebrick walls for reoccupancy readiness.
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Chain of custody document from PSC Analytical Services regarding the receipt and analysis of samples for the DEP cleanup project.
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Forwarding an updated HVAC status spreadsheet with added quadrant columns and explanations for system information reporting.
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NYC-WTC_000154939
Notice instructing staff to preserve original World Trade Center documents collected from 114 Liberty Street for potential legal use.
Filed in the same folder
NYC-WTC_000154940
EPA confirms that primary and secondary clearance levels for contaminants at 114 Liberty Street have been met.
Filed in the same folder
NYC-WTC_000154944
Summary table of chemical test results including lead and dioxin levels at 114 Liberty Street.
Filed in the same folder
NYC-WTC_000154948
Federal agencies respond to resident concerns regarding the validity of environmental clearance data for 114 Liberty Street.
Filed in the same folder
NYC-WTC_000154966
Official DEP form notifying authorities of planned asbestos abatement activities at 114 Liberty Street.
Filed in the same folder