Chain of custody for bulk sampling at 385 South End

NYC 9/11 Public Portal Document

ANALYTICAL TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY INDIVIDUAL LABORATORY c REPORT FOR3RO1ND8ND 024 LAB PORTEF NY 10010 ATC A CCYATES INC., NEW YORK, KW~

REFERENCE ACCEPTABLE RANGE 9 LAB a 28 SAMPLE REPORTED RESULTS VALUES • LOWER UPPER PERFORMANCE SCORE T RAMPLE TYPE NO. ------------------------------ 0.6582 0.7432 0.5812 O.yu52 A -1.57 Paint Chips (X) 1 -1.77 n.1752 0.2127 0.1492 0.2762 A 0.0524 D,1i377 0,?L•,'2 A -0.29 3 0.051 3.3834 2.6436 4.1232 A -0.58 4 3.2413

400.7 440.6 3C4 527.2 A -1.38 Soi l (mg/kg) 1 626.1 686.3 545.3 827.4 A -1.28 1 820.9 651.2 990.5 A -1.91 3 713.1 34.2 13.1 55.3 A 0.81 39.9

58 57.9355 37.5 78.2 A 0.02 Dust wipes (ug) 884 1370.2 A -0.98 2 1047.3 1127.0581 1 28.3887 93.4 103.4 A -0.11 3 127. 1 401 .8589 326 477.3 A 1.86 4 354.8

laboratories • Reference value is the mean of the reference standard deviations N Upper limit: reference value + 3 deviations Lower limit: reference value - 3 standard Analysis acceptable; -: Results not reported w A: lower limit, not acceptable H: Results > upper limit, L: Results < -reference value)/standard deviation 8 2 Score = (reported result results is based on z-scores. Note: the acceptabl ity of reported acceptable according to appear This is why a retorted result may ier, performance l imits, but be identified as an outl

LABORATORY YEAR-TO-DATE PERFORMANCE REPORT LAS ID=07054

ACCUMULATED PERFORMANCE PROFICIENCY ROUND ROUND • C M PERFORMANCE L 4 ROUNDStX) - --U RATING 9 SAMPLE TYPE NO. ......................... • 4/4 Paint Chips 1%) 021 022 4/4 023 4/4 4/4 16/16 100 8/8 100 P 024

Soil (mg/kg) 021 4/4 022 4/4 023 4/4 4/4 16/16 100 8/8 100 P 024

021 4/4 Dust Wipes (ug) 022 4/4 023 4/4 024 4/4 16/16 100 8/8 100

analyzed. • The denominators represent the numcer of total samples nunber of acceptable results. The numerators represent the NP: Nonoroficient - : Not Rated P • Proficient ace_!nuiated results over four rounds Performance ratings awe,^.based on Chips, soi l or dust (one year). A lao s\\Ce 3 ormance in ground paint -fourths (75Z) or more or the wipes is raced proficee t (P) i f: 1 ) three acceptable or 2) for the last accumulated results over four rounds are analyzed ano the results are 100 acceptable. two rounds, ai l samples are

NYC-WTC 000121454