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Air monitoring report cover sheet, 345 South End Ave, 2001

Machine-extracted title · confidence 90%

Cover page for an air monitoring and bulk sampling report for Building #200 at 375 South End Avenue.

NYC-WTC_000095478–000095630

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

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NYC 9/11 Public Portal Document

PROGRAM ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL TESTING (ELPAT) INDIVIDUAL LABORATORY REPORT FOR ROUND 021 LAB IDa07054 DECEMBER 16, 1997 ATC ASSOCIATES, INC. NY, NEW YORK, NY 10010

REFERENCE ACCEPTABLE RANGE # LAB D Z de SAMPLE REPORTED RESULTS VALUES * LOWER UPPER PERFORMANCE SCORE NO. SAMPLE TYPE-------------------------------------------------------------------- 1.0578 1.2516 P 0.3 Paint Chips (%) 1 0.17 2 00459 0.0452 0.0328 0.0575 A 3 7.756 6.6414 4.5218 8.7609 A 1.58 0.4999 0.5141 0.395 0.6332 A -0.36 4 459.6 463.5 387.3 539.7 A -0.15 Soil (mg/kg) 1 2 846.9 830.8 675.6 985.9 A 0.31 78.8 69.2 46.5 91.8 A 1.28 3 -0.17 4 342.4 347.2 262.2 432.3 A

270.3 261.5319 198.4 340.7 A 0.03 Dust wipes (ug) 1 163.8 159.5374 111.5 207.5 A 0.27 2 0.16 3 80.6 79.2462 53.9 104.6 A 704.9 735.3033 592.8 877.8 A -0.64 4

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

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

LABORATORY YEAR-TO-DATE PERFORMANCE REPORT LAB I0=07054

ROUND * ACCUMULATED PERFORMANCE PROFICIENCY . ROUND RATING # NO. PERFORMANCE 4 ROUNDS(%) 2 ROUNDS(%) SAMPLE TYPE -------------------------------------------------------------------------- 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 4/4 021 4/4 8/8 100 8/8 100 P

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

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

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

NYC-WTC 000095604

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NYC-WTC_000095604Source: NYC Law Department, mirrored locally

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Chain of custody for air samples collected at 345 South End Avenue buildings in late January and early February 2002.

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