Chain of custody for bulk sampling at 365 South End

NYC 9/11 Public Portal Document

ANALYTICAL TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY FOR ROUND 023 i-. ,• INDIV!OUAL LABORATORY REPORT ID=17054 JUNE 24, 1998 LAB NY, 1Es1 YORK, NY 10010 ATC ASSOCIATES INC.

ACCEPTABLE RANG'c LA8 a 4 3 REPORTED REFERENCE AMPLE 3Poc_a PERFORMANCE SCORE L ER -y SAMPLE TYPE O. RESULTS VALUES ' _-__-_--_ ......----- • • ... ... 0.0375 0.'x366 0.0265 3,67 ?~ t:mot Chips ; , 1.3085 1 .4203 2. 1966 s .'8 2 1 .831n 0.3469 0.5042 -0.30 0.4177 0.425'Z 0.3111 .2152 0.~6 1 .0184 1 .3131

+.187.! - 1655.6 A -0.37 392.7 142'.6 Sal( (mg/kg) c7 36.9 - 9 `. A 0.59 2 6l -4 a -7.35t 2 : ,_'P. ? 168 269.7 :88.2 S32 3.3~

12.3 09.4 •S39 A 120. 348 •..38 Oust v~oes .u9' - .71 .4; 'c'0. 32. A Z49 . c A . .3.50 3 .S.Z - 59.0183 :P - •° -9 3 0 ' :o' 56!.9713 38.3 685. 4

reference laboratories • • Reerence f value is the mean of the reference value 3 standard deviations Uooer limit: 3 standard deviations Lower l imit: reference value not reparteo : Results A: Analysis acceetaoie; acceetaoie Results > ucoer limit, L: Results < lower l imit, not H: va(ue)/starioare deviation result -reference 2 Score = (recorte= .cores. at reeorte7 results is based on : - Noce: the acceetaOL l ty aeoear ac_eotaele according 10 recortee resu(t may rhiS 1s why a ed as an out; ier performance ; im,ts, but be Cent' f

REPORT LABORATORY YEAR-TO-OATE PERFORMANCE LAB ID=07054

ACCUMULATED PERFORMANCE PROFICIENCY ROUND RC4)ND ' PERFORMANCE 4 ROUNDS(:) 2 ROUNDS() RATING » SAMPLE TYPE NO. --------- 020 4/4 Paint Chips (%•) 4/4 021 022 4/4 16/16 100 8/8 100 p 023 4/4

020 4/4 Soil (mg/kg) 4/4 021 022 4/4 4/4 16/16 100 8/B 100 P 023

020 4/4 Dust wipes lug) 021 4/4 022 4;4 4/4 16/16 100 8/8 100 p 023

analyzed. the numoer of total samples • the dencminators reeresent of ac_eetable results. the nianoer The nu•neracors reeresent - Not dated Proficient NP: Nonoroficient P nuiated results over four rounds acc performance ratings are based an paint chips, soi l , or dust performance in ground (one ye3r). A (ac's more of the (P), i f: 1) three -fourths (75X) or Wipes is rated proficient acceetaoie or 2) or the last rounds are ~•~ act,-_nu ate!] results over four a(; soni es are analyzed and the results are 100 "- acceotaple. •.wo rounds,

NYC-WTC 000119901