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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

(ELPAT) PROGRAM rr^ ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL TESTING INDIVIDUAL LABORATORY REPORT FOR ROUND 023 >-. ~... LA13 ID=07054 JUNE 24, 1998 ATC ASSOCIATES INC. NY, NEW YORK, NY 10010

REPORTED REFERENCE ACCEPTABLE RANGE # LAB m z & AMPLE NO. RESULTS VALUES ' LOWER UPOER PERFORMANCE SCORE SAMPLE TYPE ---------------------------------------- 1 0.0375 0.'i356 0.0265 0.04.67 A :•cint Chips (;) A 0.18 2 1 .8316 1.8085 1.4203 2.1966 3 0.4177 0.4255 0.3469 0.5042 1 -0.30 4 1.0184 1.0131 0.8111 1.2152 ; 0.1i8

1392.7 1421.6 1187.5 1655.6 A -0.37 Soi l (mg/kg) 1 2 61.4 57.4 36.9 77.9 A 0.59 3 213 Z18 9 168 269.7 A -0.35 4 459.4 460.1 388.2 532.2 A -0.03

1 112.3 125.1348 99.4 158.9 A -1 .70 Dust wipes (ug) -1 .08 2 249.5 271.547 210.4 332.7 A 3 55.2 59.0183 38.4 79.7 A -0.56 4 589 561.9713 438.3 685.7 A 0.17

laboratories ' Reference value is the mean of the reference Upper limit: reference value + 3 standard deviations deviations Lower limit: reference value - 3 standard A: Analysis acceptable; -: Results not reported a - lower limit, not acceptable H: Results > upper limit, L: Results (reported result-reference value)/standard deviation & Z Score = on. z-scores. Note: the acceptablity of reported results is lased acceptable according to This is why a reported result Tray appear performance l imits, but be identified as an outl ier.

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

ROUND * ACCUMULATED PERFORMANCE PROFICIENCY ROUND PERFORMANCE 4 ROUNDS( ) 2 ROUNDS(%) RATING # SAMPLE TYPE NO.

Paint Chips (7.) 020 4/4 021 4/4 022 4/4 023 4/4 16/16 100 8/8 100 P

Soil (mg/kg) 020 4/4 021 4/4 022 4/4 4/4 16/16 100 8/8 100 P 023

Dust Wipes (ug) 020 4/4 021 4/4 022 4/4 4/4 16/16 100 8/8 100 P 023

samples analyzed. • The denominators represent the number of total numerators represent the number of acceptable results. The P : Proficient NP: Nonproficient : Not Rated Performance ratings are based on accumulated results over four rounds or dust (one year). A lab's performance in ground paint chips, soil , wipes is rated proficient (P), if: 1) three-fourths (7531) or more of the accumulated results over four rounds are acceptable or 2) for the last two rounds, all samples are analyzed and the results are 100 y acceptable.

NYC-WTC 000095444

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NYC-WTC_000095444Source: NYC Law Department, mirrored locally

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