My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
03-13-23-R
ArdenHills
>
Administration
>
City Council
>
City Council Packets
>
2020-2029
>
2023
>
03-13-23-R
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
3/9/2023 4:04:54 PM
Creation date
3/9/2023 4:01:36 PM
Metadata
Fields
Template:
General
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
140
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
Bolton & Menk, Inc. <br />Proposal QTB172950 <br />February 17, 2023 <br />Page 4 <br />The addendum report will only address recommendations for the additional work on James Avenue. The <br />recommendations in our previous geotechnical evaluation will not change unless stated in the <br />addendum. <br />We will only submit an electronic copy of our report to you unless you request otherwise. At your <br />request, we can also send the report to additional project team members. <br />Environmental Scope of Services <br />Sediment Sampling <br />Our scope is generally based on the Minnesota Pollution Control Agency's current best management <br />practice (MPCA BMP) document (MPCA, 2017). <br />The sampling is proposed to be completed in foot -accessible locations at each of the ponds, either <br />through the ice or wading into the pond at sufficiently shallow locations. Note that if ice conditions are <br />not thick enough (including if ice has not fully receded from the pond in warmer conditions) to conduct <br />the work safely, the work may need to be postponed until pond conditions allow the safe completion of <br />the work. Additional costs may be incurred if more than one mobilization is required due to unsafe <br />conditions. <br />Per your request, and in accordance with MPCA BMPs, we will collect two analytical samples from each <br />pond area provided. The sample will be collected by driving a push probe sampler into the underlying <br />sediment using hand -driven probe sampling equipment. The sample will be comprised of composites <br />from the 0- to 5-foot interval (or shorter interval that is appropriate based on the sediment thickness) <br />from up to three sampling probe locations. For example, for a pond requiring two analytical samples, up <br />to six probes would be advanced, with sediments from three probes composited to make up the first <br />sample, and the remaining three probes comprising the second sample. This method allows for a more <br />representative sample of the sediments that will be dredged from those areas of the pond. <br />For each probe advanced, soil sample textures will be evaluated by visual methods as the samples are <br />collected and noted in the field notes. <br />Drilling tools will be cleaned prior to and between sampling runs by washing the equipment with a brush <br />and water containing trisodium phosphate and rinsing the equipment with water. Where hand -driven <br />probe samplers are used, a clean liner will be used for sample collection for each sample. <br />The samples will be transferred to clean laboratory -supplied containers, preserved in accordance with <br />Braun Intertec Standard Operating Procedures (SOPS) and transported to the Pace Analytical Services <br />laboratory for analysis. Chain of Custody will be initiated at the time of sampling and maintained <br />throughout the process. <br />Each of the sediment samples will be analyzed by the Pace Analytical Services laboratory for the <br />following parameters: <br />BRAVN <br />INTERTEC <br />
The URL can be used to link to this page
Your browser does not support the video tag.