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← Document results/DEP Box 48/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083377 345 South End Avenue, Building #100
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Chain of custody for air monitoring at 345 South End

Machine-extracted title · confidence 95%

Record documenting the transfer and custody of air samples from Building #100 at 345 South End Avenue collected on October 22, 2001.

NYC-WTC_000120991–000121041

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083377 345 South End Avenue, Building #100

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NYC 9/11 Public Portal Document

TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL INDIVIDUAL LABORATORY REPORT FOR ROUND 021 ~;•._ LAB ID=07054 DECEMBER 16, 1997 ATC ASSOCIATES, INC. NY, NE'! YORK, MY 10010

+Tea ACCEPTABLI: RANGE : LAB G Z& SAMPLE REPORTED REFERENCE VALUES • LOWER UP?FR PERFORMANCE SCORE SAMPLE TYPE NO. RESULTS 5, 6- A .864 0.39 1 3 1.05Th Paint Cnips (X)' 2 0.0328 0 0.0575 a 0.17 0.0459 0.0458 6.6414 4.5218 8.7609 1.58 3 7.756 0.5141 0.395 0.6332 A -0.36 4 0.4999

463.5 387.3 539.7 A -0.15 Soi l (mg/kg) 1 459.6 830.8 675.6 985.9 A 0.31 2 846.9 69.2 46.5 91.8 A 1.28 3 78.8 347.2 262.E 432.3 A -0.17 4 342.4

269.5319 198.4 340.7 A 0.03 1 270.3 Oust Wipes (ug) 111.5 207.5 A 0.27 2 163.8 159.5374 53.9 .C4.f A 0.16 3 80.6 79.2462 735.3033 502.8 V_. e A . 64 4 704.9

reference Laboratories * Reference value is the mean of the Upper Limit: reference value + 3 standard deviations # deviations Lower Limit: reference value - 3 standard acceptable; -: Results not reported a A: Analysis Results < tower Limit, not acceptable H: Results > upper Limit, L: value)/standard deviation -reference & Z Score = (reported result the acceptablity of reported results is based on z-scores. Note: appear acceptable according to This is why a reported result may performance limits, but be identified as an outlier.

R

LABORATORY YEAR-TO-DATE PERFORMANCE REPORT LAS 1D=07054

ACCUMULATED PERFORMANCE PROFICIERCY ROUND ROUND * PERFORMANCE 4 ROUNDS(X) 2_ROUNDS(%) - RATING #- SAMPLE TYPE NO. -------------------------------------------------- 018 4/4 Paint Chips (%) 019 4/4 020 4/4 16/16 100 8/8 100 P 021 4/4

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

018 4/4 Dust Wipes (ug) 019 4/4 020 4/4 16116 100 8/8 100 P 021 4/4

number of total samples analyzed. * The denominators represent the represent the number of acceptable results. The numerators -: Not Rated # P : Proficient NP: Nonproficient results over four rounds Performance ratings are based on accumulated ground paint chips, soil , or dust (one year). A lab's performance in wipes is rated proficient (P), if: 1) three-fourths (75X) or more of the four rounds are acceptable or 2) for the last accumulated results over analyzed and the results are 100 % acceptable. two rounds, all samples are

NYC-WTC 000121037

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NYC-WTC_000121037Source: NYC Law Department, mirrored locally

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NYC-WTC_000120940 · Box DEP Box 48

Document tracking environmental samples collected from Building #100 at 345 South End Avenue on October 22, 2001.

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