Chain of custody for bulk sampling at 365 South End

NYC 9/11 Public Portal Document PROGRAM ANALYTICAL TESTING (ELPAT) ENVIRONMENTAL LEAD PROFICIENCY FOR SROUND8ND 022 iNDIVIDUAL LABORATORY REPORT LAB ID=X37054 ORTC NY, NEW YORK, NY 70010 ATC ASSOCIATES, INC.

REFERENCE ACCEPTABLE RANGE SAMPLE RE'ORTEi) PERFORMANCE SCORE RESULTS VALUES • LONER UPPER SAMPLE TYPE N0. . +l .........'--.... . ---- 1.2043 1.7171 A "~-=9 iE .4275 :607 .3818 0.0628 3.'('00 A 0.66 0.086 A n4 3 .5632 3.6256 5.5009 '.2394 c- 0.5264 Fi45 L, 0._c 0.6247 0.6•=54

3.40 35 1 .6 360.8 292.3 429.4 A so, I (m9/k91 76.3 73.2 49.7 96.7 A 0..6 2 c A •.3.59 q,3 834.5 682.5 986.5 3 806.3 A •3.31 649.9 683.2 560

531 .6 565.93T3 432. 699 3 A ,pes :u91 :28.955; 94. 1 , A G 23.5 A 3.32 2 .'J2ó3 198.9 °45 272.6 A 863.' 895.2703 7 4.6 076

"~•an of-t`~~~fecen+ce-lzooracor,es • Reference value is the refers'. wtue • 3 standard deviations Ucoer l imit: reference value 3 standard deviations Lower limit: acceptable; Results not re orted A: Analysis limit, not ac_sotao z limit, L: Results < lower N: Results > ueper -reference value)/standard cevtation Z Score = (reported result an 2-scores. of reported results is based Nate: the ac=eptab(1tY result may appear acceotable accoroiny :o This is why a reported icentitiea as an outl ier. performance ', imits. but be

REPORT LABORATORY YE.AR-TO-OA.TE PERFORMANCE LAB 10=07054 PERFORMANCE pgOFiC:EYC7 ROUND ROUND • ACCJMULATE7 4 ROUNDS(:) 2 ROUNDS() RATING SAMPLE TYPE N0. PERFORMANCE .- 419.-_.._--- 4/4 • Paint CniPs (~) - 4/4 020 021 4/4 100 8/8 100 P 022 4/4 . 16/16

020 4/4 Soil (Ih9/k9) 4/4 021 8/8 100 P 4/4 12/12 100 022

019 4/4 Oust wipes (ug) Q20 4/4 021 4/4 16/16 100 8/8 100 P 022 4/4

samples analyzes. represent the number of total • The denominators of acceptable results. represent the rnaccer The numerators Not Rated Proficient NP: NonOrofic:ent P : are based on accumulated results aver four rounas performance ratings soi l, or oust performance in ground paint chips, (one year). A lab's 1) three -fourths (75X) or more of the (P), if: wipes is rated proficient or 2) for the last over four rounds are acceptable acc mutated results and the results are 100 acceptable. sanmles are analyzed two rounds. all r..

NYC-WTC 000119902