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Water analysis results, Hillview Reservoir, Sept 2001

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Laboratory report detailing metal analysis of water samples collected from Hillview Reservoir on September 20, 2001.

NYC-WTC_000026268–000026321

Folder label: “23079

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NYC 9/11 Public Portal Document

REPORT OF ANALYSIS Westchester County Department of Labs and Research 2 Dana Road Valhalla, New York

gency: New York City DEP DWQC Sample STATEN ISLAND Distribution Laboratory 96-05 Horace Harding Ex. Corona N.Y. 11368 Sample 51350/DEP LAB #28406 Dr. Ian Hurley ID of Source: Received EP Collection 09/19/01 AT 9:06:00 Bottle c9768,125,218,220,7209,309,543 Submitted 09/20/01 AT 10:51:00 Collected By: SACKETT Sample Type: POT_DW Comment: PWSNo.: Source Code: Type Descriptor: Chilled on arrival?: yes Report

Sample No. AD23085 Method Test Description Results Units MDL Analyzed on Validator Terbacil <MDL ug/L 2.0 09/27/01 DLV The recovery for Terbacil in the LCS Standard was above its acceptance range. GCMS Scan For Unknowns Other unknown compounds ug/L 10/10/01 DLV A scan of the extract prepared for the 508 analysis, from 35 - 550 amu using a mass spectrometer, does reveal the presence of non-target compounds at levels relatively less than other samples. These hydrocarbons do not appear to be present in the Laboratory Blank. However, these hydrocarbons were present in previous Laboratory Blanks, gnd also some samples, analyzed for this NYCDEP project. An investigation is being made to determine the source • these hydrocarbons, If other than in the samples themselves, i.e. laboratory equipment.

Approved Donna Popp Chief of Env. Lab Services Date Approved: 10/15/01

Environmental Laboratories Copy 10/15/01

NYS ELAP # 10108 Page 8 of8

NYC-WTC_000026321

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NYC-WTC_000026321Source: NYC Law Department, mirrored locally

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