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← Document results/DEP Box 48/345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083377 345 South End Avenue, Building #100
Document / 51 pages

Chain of custody for bulk sampling at 345 South End

Machine-extracted title · confidence 95%

Document tracking environmental samples collected from Building #100 at 345 South End Avenue on October 22, 2001.

NYC-WTC_000120940–000120990

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083377 345 South End Avenue, Building #100

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NYC 9/11 Public Portal Document

TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL INDIVIDUAL LABORATORY REPORT FOR ROUND 021 ~;•„ LAB ID=07054 DECEMBER 16, 1997 ATC ASSOCIATES, INC. NY, NEW MURK, NY 10010

REFERENCE ACCEPTABLI RANGE : LAB a Z& SAMPLE REPORTED PERFORMANCE SCORE VALUES * - LOWER UPPER SAMPLE TYPE NO. RESULTS ------------------------ 1.0578 0.864 A 0.39 Paint Cnips (X)- 1 1.L'53 0.0452 0.0328 0.05Th a 0.11 2 0.0459 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 0.2-1 2 163.8 3 80.6 79.2462 53.9 +Cy -F A 0.16 735.3033 592.8 ?77.0 A _64 • 4 704.9

the reference laboratories * Reference value is the mean of reference value + 3 standard deviations >Y Upper limit: reference value - 3 standard deviations Lower limit: A: Analysis acceptable; -: Results not reported < Lower limit, not acceptable H: Results > upper limit, L: Results value)/standard result -reference deviation 3 Z Score = (reported acceptablity of reported results is based on z-scores. Note: the appear acceptable according to This is why a reported result may performance Limits, but be identified as an outlier. -----------

LABORATORY TEAR-TO-DATE PERFORMANCE REPORT LAB 10=07054

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

020 4/4 Soil (mg/kg) 100 8/8 100 P 021 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 Proficient NP: Nonproficient P : results over four rounds Performance ratings are based on accumulated ground paint chips, soil, or dust (one year). A lab's performance in (P), if: 1) three-fourths (75%) or more of the wipes is rated proficient rounds are acceptable or 2) for the last accumulated results over four rounds, all samples are analyzed and the results are 100 Z acceptable. two

NYC-WTC 000120986

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NYC-WTC_000120986Source: NYC Law Department, mirrored locally

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