Facsimile cover sheet from US EPA Region 2, August 2002

z z WTC Indoor Alr/Envlronments Monitoring - Sampling and Analytical Procedures For Background and Pilot Clean up Studies o o i p Media Sampling Points Analytical Parameters Sampling Mathod Proposed Description Analytical MatJiod Proposed 1 c <£)

■a o I o Tilts Is a micro vacuuming method. Three collocated samples will CT o Asbestos ASTMD 6755-35 ASTMD 5755-95 o' Setlieri Dost Carf>els, Wtc lumiUnre or be collected from each location. I cn ru ■D tn Porous Soft drapery h areas of adhlly o O 3. CD surfaces Svfng rooms, bmily rooms] This Is a micro vacuumang mathod. Ttirae collocated samples will SW-B466C10B 03 cn Lead ASTM E1973-99 collected tom each locafion. o o Asbestos ASTfd 0648599 Wipe Samples ASTMD 6480-99 (wipe) o c 3 Lead HUD Appendix 13.1 Wipe Samples SW-84S60t0B CD 3 Horizontal surfaces of DioKins ASTMD 666101 Wipe Samples ASTM 666M1W-B46 8290 SetfledDast Non-poroue Hard surfaces tables or conntem and bare floors, ceilings and walls in areas of acUvlty (living PAHs Total Oust ASTM D6661-O1 HUD Appendix 13.1“ Wipe Samples Wipe Sample ooHecled at one location per unit. ASTM 6661-01/SW-845 8270C No Fonmal Method (NIOSH 7500 Modified} I rooms, family moms) c SBIca, calcite, tn HUD Appandix 13.1" Wipe Samples. All parameters will be collected on one wipe. NIOSH 750C(XRD) m gypsum “0 3) MMVF ASTM 06480-99 Samples wot be combined with Ihe asbestos sampBng. EMSL MSO.030I) ID

Asbestos NIOSH 7400 Air pump operated at lOUmln for 8 hours io achieve the COPS wkgroup detection limll PCM NIOSH 7400 followed by IBM AHERA method. B a-4 o z Lead Air pump operated at 10Umbi for 8 hours to achieve the COPC NIOSH 7300 SW-84660WB lU wkgroup detection Qma o Air pimp operated at 2l7min far 8 hours. Pitot Clean-up study onlyTl ®270 (Analytical method with to Zl PAHs MtOSH 6515 modlfled to achieve the COPC wkgroup deteclior o for worst case scenatfoe. Areas of known activity limit Indoor Air livkig rooms, femliy rooms Air pump operated at 26Umtn for 36 hours. This modification la not IHoxIns TO-9 (Modified tor indoor air) a proven method. To be conducted during Ihe Pilot Clean-up study SW-846 8290 only tor worst case scenarios. Silica, calcite, O Air pump operated at 2.5Vm1n for 8 hoursfoacWevelto COPC gypsum NIOSH 7500 NIOSH 7500 (XRDJ wkgnotip dete^onjlralte__________ MMVF NIOSH 7400 Assumed that it behaves the same as asbestos, samples wfli be combined vrith Ore asbestos sampling. EMSLMSD.0300 Bulk samples w« be collected from HVAC or AC window type unit "" Asbestos Sulk Sample filters, shaken kilo a plastic bag and transferrad into tea sample PLM NYS 198.1 fallowed by UJ I-* container. TEMNYS 198.4 -<1 l-A (If tire volume required Is no?attamabte for ail analysis, Ihe sampte co Lead Bulk Sample SW-846 60t0B HVAC systemsand AC vdll ba analyzed for asbestos only. units (collecOon of bulk dust PAHs Bulk Sample (If the volume requited 1s not aflainable for all analysis, the sample SW-846 8270 K' Ul Bulk Dust sample tom die unit air will be analyzed for asbestos only. Xi. X. inters). Background (If tire volume required is not attainable fur all anatysls, the sample study only. Dioxins Bulk Sample SW-846 8290 will be analyzed far asbestos only. ___ T3 Silica, calcite, (If Iha volume required is not attainable far afl analysis, Ihe sample (3 BulkSampfe NIOSH 7500 (XRDJ PJ gypsum will be analyzed for asbestos only. X ---- o MMVF Bulk Sample (If Ihe volume required Is not attainable for all analysis, Iha satrpte cn PLM NYS 198,1/EMSL MSD.03l» wDI be analyzed for asbestos only.

NOTE; •* Wipe samples far sIBca. calcilB and gypsum wB be collected usimi i»w HUD Appendix 13.1 method since no standardized method is available.