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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 BROOKLYN Distribution Laboratory 96-05 Horace Harding Ex. Corona N.Y. 11368 Sample 20650/DEP LAB #28376 Dr. Ian Hurley ID of Source: Received EP Collection 09/19/01 AT 10:42:00 Bottle C9163,209,206,207,6951,4201,54 Submitted 09/20/01 AT 10:51:00 Collected By: PATEL Sample Type: POT_DW Comment: PWSNo.: Source Code; Type Descriptor: Chilled on arrival?: yes Report

Sample No. AD23082 Method Test Description Results Units MDL Analyzed on Validator The recovery for Terbacil in the LCS Standard was above its acceptance range. The recovery for one of the three Surrogate Standards in this sample was below 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. These hydrocarbons do not appear to be present in the Laboratory Blank. However, these hydrocarbons were present in previous Laboratory Blanks, and also some samples, analyzed for this NYCDEP project. An investigation is being made to determine the source of these hydrocarbons, if other than samples themselves, i.e. laboratory equipment and reagents. Stat charge for VOLATILE organic Completed 09/21/20 12:07 AM SV

Approved Donna Popp Chief of Env. Lab Services Date Approved: 10/17/01

Environmental Laboratories Copy 10/17/01

NYS ELAP # 10108 Page 8 of8

NYC-WTC_000026297

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NYC-WTC_000026297Source: NYC Law Department, mirrored locally

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