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← Document results/DEP Box 02/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083378
Document / 123 pages

Chain of custody for environmental assessment, Nov 2001

Machine-extracted title · confidence 90%

Chain of custody form documenting bulk sampling and air monitoring at 375 South End Avenue on November 17, 2001.

NYC-WTC_000095331–000095453

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083378

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NYC 9/11 Public Portal Document

TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL INDIVIDUAL LABORATORY REPORT FOR ROUND 021 r:..

LAB ID=07054 DECEMBER 16, 1997 ATC ASSOCIATES, INC. NY, NEW YORK, NY 10010

REFERENCE ACCEPTABLh RANGE LAB a Z & SAMPLE REPORTED VALUES • LOWER UPnER PERFORMANCE SCORE SAMPLE TYPE NO. RESULTS ------------------ ------- 0.864 1 5%L A 0.39 - Cnips (X) 1 1.0833 1.0578 Paint 0.0575 0.1/ 2 0.0459 0.0452 0.0328 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 78.8 347.2 262.2 432.3 A -0.17 4 342.4

269.5319 198.4 340.7 A 0.03 Dust Wipes (ug) 1 270.3 159.5374 111.5 207.5 A 0.2; 2 163.8 79.2462 53.9 114.6 A 0.16 3 80.6 • 4 704.9 735.3033 592-8

• Reference value is the mean of the reference laboratories standard deviations # Upper Limit: reference value + 3 standard deviations Lower Limit: reference value - 3 Results not reported 3 A: Analysis acceptable; -:

Results > upper limit, L: Results < lower limit, not acceptable H: -reference value)/standard deviation S Z Score = (reported result of reported results is based on z-scores. Note: the acceptablity acceptable according to This is why a reported result may appear outlier. performance Limits, but be identified as an ---------------------

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

ACCUMULATED PERFORMANCE PROFICIENCY • ROUND ROUND • 2 ROUNDS('_) RATING NO. PERFORMANCE 4 ROUNDS(%) SAMPLE TYPE ---------------------------------------------------- 018 4/4 Paint Chips (%) 019 4/4 020 4/4 P 4/4 16/16 100 8/8 100 021

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

018 4/4 Dust Wipes (ug) 019 4/4 020 4/4 16/16 100 8/8 100 P 021 4/4

number of total samples analyzed. * The denominators represent the the number of acceptable results. The numerators represent Not Rated # P : Proficient NP: Nonproficient -:

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

NYC-WTC 000095446

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NYC-WTC_000095446Source: NYC Law Department, mirrored locally

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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.

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