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ENVIRONMENTAL
317 Elm Street, Milford, NH 03055 (603) 673-5440 sales@chemservelab.com
Statement of Project Requirements and Scope of Services
A. Statement of Project Requirements
Chemserve is a NELAC-accredited laboratory (# 1008) and has been performing environmental
sampling and laboratory analysis services for over thirty years. Our field sampling department has
been trained to utilize the latest technologies for sample collection, field testing, and proper
sample preservation. This includes water sampling and testing from wells, leachates and surface
water locations.
Chemserve will coordinate a field team with sufficient knowledge and equipment to perform the
sampling per the permit specifications at each landfill. We have recently updated all our field
instrumentation to a wireless system to maximize sampling efficiency. These were successfully
tested in the April 7-9 2021 Four Hills field sampling visit. We acknowledge that there are some
locations that will require low stress sampling and others will require standard purge sampling
techniques.
Our laboratory will provide the necessary personnel and equipment to analyze the samples that
meet the current NELAC and NHDES standards. All samples will be delivered to Chemserve (317
Elm St, Milford, NH 03055) where the majority of chemical analyses will be conducted.
Chemserve will subcontract the PFAS testing to Aloha Analytical in Westborough MA. Alpha is
both NELAC and DOD accredited for performance of PFAS testing.
All reports will be tabulated into a spreadsheet and standard report format. These reports will be
sent to the City and uploaded to NHDES. Detailed responses to the Scope of Services outlined in
the bid documents are below and organized by Task number.
B. scope of Services
TASK 1: All of the wells for this project will be purged using the guidelines set forth for proper low
stress, or “low-flow”, purging outlined in USEPA Document EQASOP-GW 001 Region 1. Low-
Stress SOP revised on January 19, 2010 or will utilize standard purging as outlined in the RCRA
Guidance Document.
The pumping devices utilized for low-flow purging shall be submersible pumps specifically
designed for low-flow sampling. The low flow field parameters shall be determined using a state-
of-the-art MicroPurge electronic flow cell from QED Environmental Systems Inc. The flow cell will
monitor temperature, dissolve oxygen (DO), specific conductivity (SC), oxidation reduction
potential (ORP), and pH with data delivered to a tablet in the field using Bluetooth technology.
Sample turbidity will be monitored using a new Turbidity meter purchased in February 2021
(SPER Scientific). Tne low-flow pumping will be performed at a rate less than 500 ml per minute
as appropriate to establish stabilized values. For low-flow purging, the well will be determined to
be stabilized when the variation in field readings are 10% or less for ORP and DO, pH is +/- 0.2
units, temperature is +/- 0.2 C. Consecutive readings will be taken a minimum of three minutes
