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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

TESTING (ELPAI) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL ROUND 022 INDIVIDUAL LABORATORY REPORT FOR LAB 10=07054 MARCH 18, 1998 ATC ASSOCIATES, INC. NY, NEW YORK, NY 10010

REFERENCE ACCEPTABLE RANGE # LAB a Z & SAMPLE REPORTED UPPER PERFORMANCE SCORE RESULTS VALUES * LOWER SAM LE TYPE NO. _ ._...-........---._... -0.39 ---~--------~ !.4607 1.2043 1.7171 A Pfirtt Chips (X) 1 1.4275 0.66 0.0818 0.0628 0.1 0? A 2 0.066 -1.04 4.2394 4.5632 3.6256 5.5009 A 3 A -0.52 4.6247 0.6454 0.5264 5.7645

360.8 292.3 429.4 A -0.40 Soil (mg/kg) 1 351.6 0.46 73.2 49.7 96.7 A 2 76.8 -0.69 834.5 682.5 986.5 A 3 799.3 -0.81 683.2 560 806.3 A 4 649.9 432.1 699.8 A -0.77 1 531.6 565.9373 Oust Wipes (ug) 128.9551 94.1 163.8 A 0.47 2 123.5 0.02 3 272.6 272.0263 198.9 345 2 AA -0.53 863.1 895.2703 714.6 1076 4

ref.ererace.taaboratories _ . Reference value is the nean of-ti deviations referer.t:c atue + 3 standard # Upper limit: standard deviations Lower limit: reference value - 3 Results not reported 2 A: Analysis acceptable; •: upper limit, L: Results < lower limit, not acceptable H: Results > value)/standard deviation (reported result -reference $ Z Score = results is based on z-scores. reported Note: the acceptablity of may appear acceptable according to This is why a reported result identified as an outlier. i--_- performance limits, but be -ter, ___-------- ------ -

LABORATORY YEAR-TO'DAJE PERFORMANCE REPORT LAS ID=07054 PERFORMANCE PROFICIENCY ROUND ROUND * ACCUMULATED PERFORMANCE 4 ROUNDS(%) .+-2-ROUNDS(%) --RATING-#.- SAMPLE TYPE NO.

019 4/4 Paint Chips (%) 020 4/4 021 4/4 4/4 . 16/16 100 8/8 100 P 022

020 4/4 Soil (mg/kg) 021 4/4 4/4 12/12 100 8/8 100 P 022

Dust Wipes (ug) 019 4/4 020 4/4 021 4/4 4/4 16/16 100 8/8 100 P 022

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

NYC-WTC 000121509

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NYC-WTC_000121509Source: 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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