← 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

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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 ANALYTYCAL: TNSTING INDIVIDUAL LABORATORY REPORT FOR ROUND 021 LAB ID-07054 OECE.MBER 16, 1997 ATC ASSOCIATES, INC. NY, NEW YORK, NY 10010

REFERENCE ACCEPTABLE RANGE # I.AB B 23 SAMPLE REPORTED RESULTS VALUES * LOWER UP'KR._» PERFORMANCE SCORE SAMPLE TYPE No. (X)-----•j-------1.u833....,.-1.OS78y•--_--0.864+».. '--A t`f56 0.39 Pafnt`C»ips 2 0.0459 0.0452 0.0328 0.05Ti A 0.17 6.6414 4.5218 8.7609 A 1.58 3 7.756 0.4949 0.3141 0.395 0.6332 A -0.36 4

459.6 463.5 387.3 539.7 A -0.15 Soil (mg/kg) 1 846.9 830.8 675.6 985.9 A 0.31 2 78.8 69.2 46.5 91.8 A 1.28 3 -0.17 342.4 347.2 262.2 432.3 A 4

270.3 269.5319 198.4 340.7 A 0.03 Dust wipes (ug) 1 163.8 159.5374 111.5 207.5 A 0.27 2 80.6 79.2462 53.9 1C4.6 A 0.16 3 704.9 735.3033 502.8 877.2 A 4

reference Laboratories * Reference value Is the mean of the deviations # Upper limit: reference value + 3 standard deviations Lower limit: reference value - 3 standard Analysis acceptable: -: Results not reported B A: < Lower limit, not acceptable H: Results > upper limit, L: Results deviation (reported result -reference value)/standard Z Score = reported results Is based on z-scores. Note: the acceptablity of acceptable according to This is why a reported result may appear performance limits, but be identified as an outlier. ~~~~q~9s.:..4.~.5.'-.=353Ra~27~A6'yM3s.3a'.RS'Sa=~is2tS3R37t.~' aOSOC~s.=R, x~~.a~xs35"c~"t _.~.~

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

ROUND * ACCUMULATED PERFORMANCE PROFICIENCY ROUND PERFORMANCE '4 ROUNDS(-.) 2 ROUNDS(-.) RATING SAMPLE TYPE NO.

Paint Chips (%) 018 4/4 019 4/4 020 4/4 4/4 16/16 100 8/8 100 P 021

Soil (mg/kg) 020 414 4/4 8/8 100 8/8 100 P 021

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

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

NYC-WTC 000121510

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NYC-WTC_000121510Source: NYC Law Department, mirrored locally

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Chain of custody for bulk sampling at 385 South End · Box DEP Box 48

NYC-WTC_000121409

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

31 shared non-person entities · 1 shared topics · Same agency, volume and box · similarity 0.997