Chain of custody for bulk sampling at 395 South End

NYC 9/11 Public Portal Document

PROGRAM ANALYTICAL TESTING (ELPAT) ENVIRONMENTAL LEAD PROFICIENCY 022 INDIVIDUAL LABORATORY REPORT FOR LAB t0=07054 ORTCH SROUND NY, NEW YORK, NY 10010 ATC ASSOCIATES, INC.

ACCEPTABLE RANGE # LAB d Z 8 REPORTED REFERENCE SAMPLE LOWER UPPER PERFORMANCE SCORE RESULTS VALUES • NO. ----------------- MPLE TYPE ------------------- ---------------------- - 1 1.2043 1.7171 A 0.39 P - Chip- 1.4275 '.4607 rrt Chips (0) G.1~03 A 0.66 P 2 0.086 0.0818 0.0628 4.5632 3.62 256 5.5009 A 1.04 3 4.2394 A -0.52 0,6%54 0.5264 :,.764: 0.6247 429.4 A 0.40 351.6 360.5 292.3 Soi l (mg/kg) 1 7 A 0.46 2 76.8 73.2 49.7 96. A -0.69 3 799.3 834.5 682.5 986.5 -0.81 560 806.3 A 4 649.9 683.2

432.1 699.8 A -0.77 523.6 528.9573 -0 47 1 2 A Oust vipes tug) 128.9551 94.1 163.8 2 123.5 A 0.02 272.0263 198.9 ',45 2 3 272.6 A -0.53 895.2703 714.6 1076 4 863.1

of-t`-s~ref.ererce,lisboracories • Reference value is the P*an Upper limit: refere^:.e.vntUe + 3 standard deviations Lower limit: reference value - 3 standard deviations acceptable; •. Results not reported A: Analysis not acceptable L: Results < lower limit, deviation H: Results > upper Limit, resutt-reference value)/standard b Z Scare = (reported reported results is basedan Note: the acceptability of appear as nbz-sca e res. is This is why a reported result may as an outtier. identified performance ti-its, but be

REPORT LABORATORY YEAR-TO-0AJE PERFORMANCE LAB lD=07054 PERFORMANCE PROFICIENCY ROUND • ACCUMULATED ROUND PERFORMANCE 4 ROUNDS(%) 2 RCUNDS(%) - - RATING 9 SAMPLE TYPE NO.

019 4/4 Paint Chips (X)-- - 4/4 020 021 4/4 100 8/8 100 P 022 4/4 . 16/16

Soft (mg/kg) 020 4/4 021 4/4 100 P 022 4/4 12112 100 8/8

019 4/4 Dust Wipes (ug) 020 4/4 021 4/4 100 8/8 100 P 4/4 16/16 022

analyzed. the number of total samples • The denominators represent the number of acceptable The n merators represent results.Mat Rated # p : Proficient NP: Nonproficient four rounds on accumulated results over Performance ratings are based soil, or dust performance in ground paint chips, (one year). A tab's (75%) or more of the rated proficient (P), if: 1) three-fourths wipes is rounds are acceptable or 2) for the last accumulated results over four results are 100 S acceptable. analyzed and the two rounds, all samples are

NYC-WTC 000121737