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← 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 air monitoring at 385 South End

Machine-extracted title · confidence 95%

Record documenting the transfer and custody of air samples from Building #500 at 385 South End Avenue collected on October 22, 2001.

NYC-WTC_000121462–000121514

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

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

REPORTED REFERENCE ACCEPTABLE RAG .4 LAB @ Z & SAMPLE • RESULTS VALUES ' LOWER UppER PERFORMANCE SCORE • $ANKLE TYPE NO. ------•----- ------- --------- -- ------- 0.0375 0.1366 0.0265 0.0467 A :t:nt Chips (.) 1 1.8085 1.4203 2.1966 A 0.18 2 1.8316 0.4255 0.3469 0.5042 1 -0.30 3 0.4177 G 1.0184 1.0131 0.8111 1.2152

1421.6 1187.5 1655.6 A -0.37 Soil tmg/kg) 1 1392.7 57.4 36.9 77.9 A 0.59 ::.. 2 61.4 7.1P, 9 168 269.7 A 0.35 3 213 459.4 460.1 388.2 532.2 A -0.03 4

125.1348 99.4 158.9 A -1.70 Dust wipes lug) 1 112.3 271.547 210.4 332.7 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 0.17 4 _69

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

LABORATORY YEAR-TO-DATE PERFORMANCE REPORT LAS iD-07054

ACCUMULATED PERFORMANCE PROFICIENCY ROUND ROUND " PERFORMANCE 4 ROUNDS(%) 2 RO(JNDS(%) RATING # SAMPLE TYPE NO.

Paint Chips !X) 020 4/4 021 4/4 022 4/4 4/4 16/16 100 8/8 100 P 023

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

Dust Wipes lug) 020 4/4 021 4/4 022 4/4 4/4 16/16 100 8/8 100 P 023

total samples analyzed. The denominators represent the number of acceptable results. The numerators represent the number of NP: Monproficient Not Rated-:

># P : Proficient ratings are based on accumulated results over four rounds Performance paint chips, sort, or dust (one year). A tab's performance in ground (75%) or more of the wipes is rated proficient (P), if: 1) three-fourths for the last accumulated results over four rounds are acceptable or 2) 100 % acceptable. two rounds, atl samples are analyzed and the results are

NYC-WTC 000121508

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NYC-WTC_000121508Source: NYC Law Department, mirrored locally

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NYC-WTC_000120991 · Box DEP Box 48

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

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