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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

ANALYTICAL TESTING (ELPAT) PROGRAM ENVIRONMENTAL LEAD PROFICIENCY INDIVIDUAL LABORATORY REPORT FOR ROUND 023 LAB tD=07054 JUNE 24, 1998 ATC ASSOCIATES INC. NY, NEW TURK, NY 10010

REFERENCE ACCEPTABLE RANGE # LAB d Z 8 .;AMPLE REPORTED VALUES ' LOWER UP ER PERFORMANCE SCORE NO. RESULTS -SMPLE TYPE O.ti366 0.0265 0.0467 A - 20 1 0.0375 :t nt Chips ( 1.4203 2.1966 A 0.18 2 1 .831h 1.8085 0.3469 0.5042 -0.30 3 0.4177 0.425^ 1.0131 0.8111 1.2152 0.(JO 4 1.0184

1392.7 1421 .6 1187.5 1655.6 A -0.37 Soi l (mg/kg) 1 57 t 36.9 77.9 A 0.59 2 61.4 168 269.7 A -0.35 3 213 7..e 9 388.2 532.2 A -0.03 4 459.4 46(.4

1112.3 129. 348 99.4 158.9 A 1 Oust wipes (ug) -1.08 2 249.5 ?71.547 210.4 332.7 A 59.0183 38.4 79.7 A -0.56 3 55.2 438.3 685.7 A 0.17 4 5o5 561,9713

reference Laboratories • Reference value is the mean of the 3 standard deviations # Upper limit: reference value t standard deviations Lower limit: reference value • 3 acceptable; Results not reported A: Analysis upper limit, L: Results < lower limit, not acceptable H: Results > value)/standard deviation result - reference 8 Z Score = (reported the acceptabt ity of reported results is based on z -scores. Note: may appear acceptable according to This is why a reported result performance l imits, but be identified as an outl ier.

LABORATORY YEAR' TO-DATE PERFORMANCE REPORT LAB ID=J7054

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

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

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

020 4/4 Oust Wipes (ug) 021 4/4 022 4,'4 4/4 16/16 100 8/8 100 P 023

number of total samples analyzed. • The dencminators represent the nt,2nber of acceptable results. The numerators represent the Not Rated P : Proficient NP: Nonproficient accumulated results over four rounds Performance ratings are based on in ground paint chips, soil , or dust (one year). A lab's performance (P1, if: 1) three -fourths (757) or more of the wipes is rated proficient accumulated results over four rounds are acceptable or 2) for the last rounds, al l samples are analyzed and the results are 100 : acceptable. two

NYC-WTC 000119944

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NYC-WTC_000119944Source: NYC Law Department, mirrored locally

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