← Document results/DEP Box 48/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083376 385 South End Avenue, Building #500

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Chain of custody for bulk sampling at 385 South End

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Document tracking environmental samples collected from Building #500 at 385 South End Avenue on October 22, 2001.

NYC-WTC_000121409–000121461

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083376 385 South End Avenue, Building #500”

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NYC 9/11 Public Portal Document

TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL INDIVIDUAL LABORATORY REPORT FOR ROUND 023 LAB 1D=07054 JUNE 24, 1998 ATC ASSOCIATES INC. NY, NEW YORK, NY 10010

REPORTED REFERENCE ACCEPTABLE RANGE # LAB d 2 ;.AMPLE RESULTS VALUES • LOWER UP°ER PERFORMANCE SCORE SAMPLE TYPE NO. ------------------ ^ 1 0.0375 0.0366 0.0265 0.0467 A -•ice ti t chips Cam) 2.1966 a 0.18 2 1 .8316 1.8085 1.4203 0.4177 0.425^ 0.3469 0.5042 -0.30 1.0184 1.013. 0.3111 1.2152 ; O.Ud

1421 .6 1187.5 1655.6 A -0.37 Sai l (mg/kg) 1 1392.7 61.4 °7.1 36.9 77.9 A 0.59 2 -0.35 3 213 718 9 168 269.? A 459.4 46(-.2 388.2 532.2 A -0.03 4

125. 1348 99.4 158.9 A - 1 .70 Oust wipes lug) 1 112.3 t71-547 210.4 332.7 A -1.08 2 249.5 59.0183 38.4 79.7 A -0.56 3 55.2 561.9713 438.3 685.7 A 0. 7 • 36,

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

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

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

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

020 4/4 Oust wipes (ug) 021 4/4 022 4/4 4/4 16/16 100 8/8 100 P 023

of total samples analyzed. • The denominators represent the number acceptable results. The numerators represent the number of NP: Nonproficient Not Rated P : Proficient ratings are based an accumulated results over four rounds Performance paint chips, soi l . or dust (one year). A lab's performance in ground -fourths (75Z) or more of the wipes is rated proficient (P), i f: 1) three or 2) for the last acc:.muiateci results over four rounds are acceptable rounds, all camoles are analyzed and the results are 100 : acceptable. two

NYC-WTC 000121455

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NYC-WTC_000121455Source: NYC Law Department, mirrored locally

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NYC-WTC_000121462

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