Memo on vehicle release from Ground Zero, Jan 2002

I e: 1 1 o z 5S -< o 0 A g FBISampteResull5.xls OUST and SIUCA c •! A R o' o “□ o o SAMPLE RESULTS > RESPIRABLE DUST and CRYSTALLINE SILICA ;5. 03 O1 o O 03 O SAMPLE A T/ ANALYSIS O o DATE LOCATION NUMBER PERSONAL METHOD USED METHOD LIMIT OF DETECTION SAMPLE RESULT LAB c A 0 3 o 9 09/26/01 BLANK 136927 BLANK NIOSH 0600/7500 Dust 0.05 mg <0.05 mg Galson 2- to n Silica 0.01 mg Quartz <0.01 mg GaSon N CM Cristobalite <0.01 mg Galson Tridymite <0.01 mg Galson

09/27/01 Ground Zero 136937 Personal NIOSH 0600/7500 DustO.OS mg <0.05 mg Galson I Silica 0.01 mg Quartz <0.01 mg Galson CrbtobaUte <0.01 mg Galson Tridymite *0.01 mg Galson ca Ground 136925 Personal NIOSH 0600/7500 Dust 0.05 mg 0.084 mg Galson Silica 0.01 mg Quartz <0.01 mg Galson Cristobalite <0.01 mg Galson Tridymite <0.01 mg Galson SI 09/27/01 BLANK 136924 BLANK NIOSH 0600/7500 Dust 0.05 mg i<0.05 mg_______ I Galson Silica 0.01 mg Quartz <0.01 mg Galson Cristobalite <0,01 mg Galson H I C Tridymite <0.01 mg Galson o . 6

o 10/02/01 Landfill 137021 Personal NIOSH 0600 Dust 0.05 mg 0.119 mg Galson ® t §' 1O/O2A)1 BLANK 137007 BLANK NIOSH 0600 DustO.OSmg <0.5 mg_________ Galson J <0 Silica 0.01 mg Quartz <0.01 mg Galson Cristabafite <0.01 mg (Salson U z Tridymite <0.01 mg Galson ' 8 10/02/01 Landfill 137008 Personal NIOSH 0600/7500 Dust 0.05 mg <0.05 mg T______ Gabon ? Silica 0.01 mg Quartz <0.01 mg Galson § CM Cristobatite.cQ.OI mg Galson N O Tridymite <0.01 mg Galson I CM •u J s 1/10/02 32 of 35 12:57 PM