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

NYC 9/11 Public Portal Document

ENVIRONMENTAL LEAD PROFICIENCY ANALYTICAL TESTING (ELPAT) PROGRAM INDIVIDUAL LABORATORY REPORT FOR ROUND 023 ,. LAB ID=07054 JUNE 24, 1998 ATC ASSOCIATES INC. NY, NEW YORK, MY 1^O010

SAMPLE REPORTED REFERENCE ACCEPTABLE •RANGE # LAB R 2& SAMPLE TYPE NO. RESULTS VALUES * LOWER UPPER PERFORMANCE STARE

1 0 0375 D.^366 9-0265 0.0467 A 0.28 Paint Chips (X) 2 1.8316 1.8085 1.1.203 2.1966 A 0.18 3 C.4177 0.4255 0.3469 0.5042 A -0.30 4 1.0184 1.0131 0.8111 1.2152 A 0.08

Soil (mg/!.g) 1 1392.7 1421.6 1187.5 1655.6 A -0.37 2 61.4 57.4 36.9 77.9 A 0.59 3 213 218.9 168 269.7 A -0.35 4 459.4 460.2 388.2 532.2 A -0.03

1 112.3 129.1348 99.4 158.9 A -1.70 Dust Wipes (ug) 2 249.5 271.547 210.4 332.7 A -1.08 3 55.2 59.0183 38.4 79.7 A -0.56 4 569 561.9713 438.3 685.7 A 0.17

* Reference value is the mean of the reference Laboratories # Upper limit: reference value + 3 standard deviations Lower Limit: reference value - 3 standard deviations 2 A: Analysis acceptable; -: Results not reported H: Results > upper limit, I.: Results < Lower limit, not acceptable & 2 Score = (reported result-reference value)/standard deviation Note: the acceptablity of reported results is based on z-scores. This is why a reported result may appear acceptable according to performance limits, but be identified as an outlier. ==a=a===a==aa===aa=aav=a=a=a~aaa=aaa=aaa caaaa=aaaaaaaaaaaa ____tea==.=

a

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

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

Paint Chips (X) 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 4/4 023 4/4 16/16 100 8/8 100 P

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

• The denominators represent the number of total samples analyzed. The numerators represent the number of acceptable results. # P : Proficient NP: Nonproficient -: Not Rated Performance ratings are based on accumulated results over four rounds (one year). A lab's performance in ground paint chips, soil, or dust wipes is rated proficient (P), if: 1) three-fourths (75%) 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 % acceptable.

NYC-WTC 000095602