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Chain of custody for air monitoring at 365 South End

Machine-extracted title · confidence 95%

Record documenting the transfer and custody of air samples from 365 South End Avenue collected on October 17, 2001.

NYC-WTC_000119908–000119950

Folder label: “365 345 SOUTH END AV 1083375, 16/100

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NYC 9/11 Public Portal Document

PROGRAM ANALYTICAL TESTING (ELPAT) ENVIRONMENTAL LEAD PROFICIENCY 022 INDIVIDUAL LABORATORY REPORT LAB ID=07054 ORTCH RSROUND INC. NY, NEW YORK, NY 10010 ATC ASSOCIATES,

ACCEPTABLE RANGE # LAB d 2 & REPORTED REFERENCE SAMPLE NO. RESUL TS VALUES * LOWER UPPER PERFORMANCE SCORE SAMPLE TYPE -------------------- --------. 4607 1.2043 1.7171 ^"'~ 1.4275 0.1002 A 0.66 ~P, nt Chips (X) 2 0.086 0.0818 0.0628 .1.04 3 4.2394 4.5632 3.6256 5.5009 :x.764; A A -0.52 0.6454 0.5264 4 0.6247 -0.40 1 351.6 360.8 292.3 429.4 A Soi l (mg/kg) 76.8 73.2 49.7 96.7 A 0.46 2 682.5 986.5 A -0.69 3 799.3 834.5 560 806.3 A - 0.81 649.9 683.2 -0-77 531.6 565.9373 432.1 699 8 A Dust wipes (ug) 1 94. 1 163.8 A -0.41 2 123.5 1 28.4551 A 0.02 198.9 '.45 2 3 272.6 272.0263 -0.53 4 863.1 895.2703 714.6 1076 A

of,tb.rcfetercetil:aboratories ' an * Reference value is the value + 3 standard deviations f! Upper limit: reference value - 3 standard deviations Lower limit: reference acceptable; Results not reported 03 A: Analysis acceptable upper limit, L: Results < lower limit, not H: Results > -reference value)/standard deviation result & 2 Score = (reported reported results is basedon Note: the acceptablity of result may appear acceptable ac ing to This is why a reported identified as an outtier performance l imits, but be

REPORT LABORATORY YEAR-TO-DAJE PERFORMANCE LAB 10=07054 PERFORMANCE PROFICIENCY ROUND * ACCUMULATED ROUND 2 ROUNDS(%) RATING # PERFORMANCE 4 ROUNDS(.) SAMPLE TYPE NO. --------------------- -- 019 4/4 Pa int Chips (^) 020 4/4 021 4/4 100 8/8 100 P 022 4/4 . 16/16

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

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

samples analyzed. represent the number of total • The denominators number of acceptable the The numerators represent results. Rated R Proficient NP: Nonproficient accumulated results over four rounds on Performance ratings are based or dust performance in ground paint chips, soil, (one year). A lab's if: 1) three-fourths (75%) or more of the proficient (P), wipes is rated rounds are acceptable or 2) for the last accumulated results over four acceptable. analyzed and the results are 100 % two rounds, all samples are

NYC-WTC 000119945

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NYC-WTC_000119945Source: NYC Law Department, mirrored locally

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NYC-WTC_000121462 · Box DEP Box 48

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

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