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EPA interim final report on WTC background study, April 2003

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Interim final report from EPA Region 2 detailing a background study of environmental conditions at the World Trade Center site.

NYC-WTC_000145869–000146029

Folder label: “INTERIM FINAL April 2003

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NYC 9/11 Public Portal Document

4.2.3 Wipe Sampling Equipment

ANALYTE SAMPLE MEDIA WETTING SAMPLE SOLUTION CONTAINER Asbestos, MMVF 9x9 inch, Super 10 to 20 milliliters of a 4oz. Polx 1200 Class 10 50/50 mixture of 2- polypropylene Clean room wipes. propanol and DI Water container Lead, Crystalline 15 cmx 15 cm. DI Water 50 ml silica. Calcite, Ghost Wipes™, polyethylene Gypsum, Total (SKC Inc., No. 225- centrifuge tubes Dust 24fourteen) PAHs, Dioxins 3x3 inch, Cotton 2 milliliters of acetone 125 ml Amber gauze glass jars with PTFE-lined caps

4.2.4 Bulk Sampling Equipment Sample equipment used for the collection of bulk dust samples from the air­ conditioner unit filters included: disposable brushes, stainless steel bowl, aluminum foil and 4 oz. polypropylene containers.

4.3 Sample Numbering/Identification The sample numbering/identification scheme was specific to the addresses, building identification numbers and apartment numbers sampled. For the purpose of maintaining confidentiality of the building owners and residents, die sample numbers are not provided in this report.

4.4 Sample Shipment All samples were placed in plastic coolers with bagged ice or ice packs and shipped to the appropriate laboratory for analysis. All sample documentation was placed and sealed in a plastic bag and affixed to the underside of each cooler lid. The lid was sealed and affixed on at least two sides with custody seals so that any sign of tampering would be visible.

TRC packaged the samples for shipment/transport to the EPA contracted laboratory as specified in the table below and on chain of custody forms.

WORLD TRADE CENTER BACKGROUND STUDY 16

NYC-WTC_000145891

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NYC-WTC_000145891Source: NYC Law Department, mirrored locally

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