hemf,erve
ENVIRONMENTAL
317 Elm Street, Milford, NH 03055 (603) 673-5440 sales@chemservelab.com
apart. For turbidity that is less than 5 NTU the well will be considered stable after three
consecutive readings less than 5 NTU. Any well that does not conform to 5 NTU or less in a
reasonable time, will be low rate purged for one hour or until 5 NTU, whichever comes first.
Samples will be filtered (0.45 uM) and analyzed for dissolved metals except for bedrock and
surface water samples which will remain unfiltered and analyzed for total metals.
For standard purging, the well volume will be calculated, three volumes of water will be purged
from each well, and field testing for pH, specific conductance, and temperature will be performed.
Note on PFAS analysis: PFAS analysis will conform to the published NHDES guidelines for testing
PFAS and PFCs. As directed by Addendum 2 of the RFP0931-041321 bid document the analysis
will utilize the 537 method modified with isotope dilution on 24 compounds listed in USEPA
SW 846 method 8327. For analytical consistency, the PFAS testing will be conducted by the same
lab that Chemserve partnered with for the current City of Nashua contract; Alpha Analytical
Laboratories.
After the appropriate purging technique of each well has occurred, samples will be collected. All
samples will be collected in accordance with the preservatives and containers outlined in 40 CFR
Part 136. Samples will be delivered the same day to the Chemserve laboratory and analyzed
within prescribed holding times following the methods accepted by NHDES for the analyses
requested. All samples shall be received under proper chain of custody documentation.
Chemserve will follow specific guidelines to avoid cross-contamination and guidelines set forth for
proper PFAS sample collection.
TASK 2: We are currently the vendor that provides sampling and analysis services for the City of
Nashua at these landfill sites. Consequently, we are familiar with the sampling sites detailed in the
RFP including well locations, leachate sample locations and surface water locations.
TASK 3: Upon completion of analysis, results will be reported to the DES Groundwater Permits
Coordinator and the City of Nashua consistent with GMP reporting requirements. Results that
exceed allowable limits will be flagged. All results will be reported within 45 days of sampling.
TASK 4: Chemserve will review data with the City at no additional cost when required. In addition,
if field or lab contamination of samples occurs, or if questionable analyses are reported,
Chemserve will re-sample at no additional cost.
TASK 5: Chemserve will coordinate all sampling events through the City-designated contact
person.
TASK 6: Chemserve acknowledges that the City will prepare and submit biennial summary
reports to the NHDES.
TASK 7: Chemserve will provide laboratory analysis of storm water samples collected by Four
Hills landfill personnel.
