EPA interim final report on WTC background study, April 2003

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o o i 1^ TABLE 4-1 WTC Background Study co

■D o Sampling and Analytical Procedures Summary c o CT o o' Analytical Required Detection ■D cn Media Sampling Points Sampling Method Description Analytical Method co Parameters Umits' o KJ This is a micro vacuuming method. By taping three wipe-sampling 3. 03 Asbestos ASTM D 5755-95 templates together, three co-located samples were collected from Settled Dust Carpets, fabric furniture or _____________________ each location._____________________ ASTM D 5755-95 1000 structures/cc o o Porous Soft drapery in areas of activity o surfaces (living rooms, family rooms) This is a micro vacuuming method. By taping three wipe-sampling c Lead ASTM E 1973-99 templates together, three co-located samples were collected from SW-846 601OB <25ug/ft’ 3 eac3h lotion. CD

Asbestos ASTM D 6480-99 Wipe Samples (samples wm be conected on the same wipe as MMVF) ASTM D 6480-99 (wipe) 1000 structures/cc Lead HUD Appendix 13.1 Wipe Samples SW-846 6010B <25ug/ft’ Horizontal surfaces of Dioxins ASTM D 6661-01 Wipe Samples ASTM 6661-01/SW-846 8290 <2 ng/m* Settled Dust tables or counters and bare Non-poious PAHs ASTM D 6661-01 Wipe Samples ASTM 6661-01/SW-846 8270C <0.3 mg/m’ floors, ceilings and walls In Hard areas of activity (living surfaces Total Dust HUD Appendix 13.1* Wipe Samples No Formal Method (NIOSH 7500 Modified) No detection limit required rooms, family rooms) Silica, calcite. HUD Appendix 13.1* Wipe Samples. All parameters were collected on one wipe. NIOSH 7500 (XRD) Background gypsum MMVF ASTM D 6480-99 Wipe Samples (samples will be conected on the same wipe as asbestos) EMSLMSD0310 Background Air pump operated at lOL/min for 8 hours to achieve the COPC PCM NIOSH 7400 followed by TEM AHERA PCM 0.0009 »cc Asbestos NIOSH 7400 wkgroup Practical Quantitation Limit (PQL) method. TEM 0.0005 f/cc Air pump operated at lOL/min for 8 hours to achieve the COPC Lead NIOSH 7300 SW-846 601 OB 0.1 ug/m’ Areas of known activity wkgroup PQL Indoor Air (living rooms, family rooms) Silica, calcite. Air pump operated at 2.5L/min for 8 hours to achieve the COPC NIOSH 7500 NIOSH 7500 (XRD) 0.5 ug/m’ gypsum wkgroup PQL Air pump operated at lOL/min for 8 hours to achieve the COPC MMVF’ NIOSH 7400 EMSL MSD 0310 <0.01 f/cc wkgroup Practical Quantitation Limit (PQL)

Asbestos: PLM NYS 198.1 followed by Bulk dust samples* were collected from AC window typo unit filters. Background Asbestos; lead; Attachment 5 of the QAPP TEM NYS 198.4 brushed with a disposable brush into a stainless steel bowl and AC window units (collection silica, calcite. “HVAC Or Air Conditioner transferred into sample containers. If the volume required was not __________ Lead: SW-846 6010B__________ <25uflffl’ Bulk Dust of bulk dust sample from gypsum: MMVF Filter Bulk Collection sufficient for all analyses, the sample analysis was prioritized as Silica, calcite, gypsum: NIOSH 7500 (XRD) Background the unit air filters). Protocor prepared by TRC follows: asbestos, lead, silica, calcite, gypsum. MMVF. PAHs. and MMVF: PLM NYS 198.1/EMSL MSD 0310 Background Solutions Inc. dioxins. _________ Dioxins: SW-846 8290_________ <2nq/m’ Dioxins. PAHs PAHs: SW-846 8270 <0.3 mg/m*

NOTES: ^Required Detection limits are Tier III Levels from "Indoor Air Assessment Selecting Contaminants of Potential Concern and Setting Health Based Benchmarks" prepared by the Contaminants of Potential Concern (COPC) Committee of the World Trade Center Indoor Air Taskforce Working Group ’ Wipe samples for total dust and silica, calcite and gypsum will be collected using the HUD Appendix 13.1 method since no standardized method is available. ’ No standardized sampling method exists for this parameter. On the assumpition that this fibrous material behaves in the air in the same way as asbestos. NIOSH 7400 will be utiized. Analysis via EMSL MSD 0310 (see the EMSL SOP in Appendix C). * No less than 5 grams and up to 20 grams of dust are required to analyze for asbestos, lead, silica, calcite, gypsum, and MMVF. At least 10 grams of dust for PAHs and 30 grams for dioxins. LEGEND: < = less than f/cc = fibers per square centimeter mg/m* = milligrams per square meter ng/m*= nanograms per square meter ug/ft* = micrograms per square foot ug/m’= micrograms per square meter