EXHIBIT H - CTL Thompson Ground Water Testing Dated July 13 2023.pdf
PDF 277 KB Posted
- Attached to
- Power Trail Crossing at Harmony Road
- Solicitation number
- 10205
- Issued by
- Larimer County, Colorado
About this file
This document is a groundwater testing report from CTL|Thompson, Inc. for the Power Trail Underpass project in Fort Collins, Colorado, prepared for OTAK, an engineering firm. The report details groundwater testing performed on a sample recovered from piezometer TH-1, with testing methods focused on gasoline (GRO – TVPH) and diesel (DRO – TEPH) range petroleum constituents. The testing was conducted for planning purposes related to potential dewatering needs for construction, with the sample collected on July 7, 2023, and analyzed by Technology Laboratory, Inc. on July 11-12, 2023.
The laboratory analysis results show that both DRO (TEPH) and GRO (TVPH) levels were below the minimum detection limit of 0.5 mg/L, using EPA methods 8015B and 8260B respectively. CTL|Thompson noted that the piezometer was originally installed for geotechnical purposes, and strict environmental installation techniques were not employed, which may potentially impact the testing results. Despite this caveat, proper sampling and transport protocols for environmental sampling were followed during the testing program.
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Text version
400 North Link Lane | Fort Collins, Colorado 80524 Telephone: 970-206-9455 Fax: 970-206-9441
July 13, 2023
Per your request, CTL|Thompson, Inc. groundwater tests were performed on a sample recovered from piezometer TH-1 at the above referenced project. We understand the testing is for planning purposes related to potential dewatering needs for construction. Testing methods included gasoline (GRO – TVPH) and diesel (DRO – TEPH) range petroleum constituents. The results of testing are included with this letter.
Per our discussion, you understand that the piezometer was installed for geotechnical purposes and strict environmental installation techniques were not performed, which may or may not have an impact on the testing results. Proper sampling and transport protocols for environmental sampling were followed for this testing program.
We appreciate the opportunity to work with you on this project. If you have any additional questions or concerns, please contact the undersigned.
Sincerely, CTL|THOMPSON, INC.
R.B. “Chip” Leadbetter, III, PE Senior Engineer
OTAK
371 Centennial Parkway, Suite 210 Louisville, Colorado 80027
Attention: Dan Beltzer, P.E.
Subject: Groundwater Testing Power Trail Underpass
Fort Collins, Colorado CTL|T Project Number: FC10823-112
FIGURE 1: BORING LOCATION
OTAK
POWER TRAIL UNDERPASS
CTL | T PROJECT NO. FC10823-112
TECHNOLOGY LABORATORY, INC.
CENTRE PROFESSIONAL PARK
1012 Centre Avenue Fort Collins, Colorado 80526
(970) 490-1414
CERTIFICATE OF ANALYSIS
CTL Thompson 351 Linden Street Fort Collins, CO 80524
Sampled: 07/07/23
Received: 07/07/23
Laboratory ID: C5376-01
Sample ID: TH-1 Project No.: FC 10823-125
Matrix: Water
ParameterNumber Result Units Method Analyzed CAS Date
MDL
DRO (TEPH)N/A < 0.5 mg/L EPA-8015B 07/12/230.5
GRO (TVPH)N/A < 0.5 mg/L EPA-8260B 07/11/230.5
The results contained in this report relate only to those items tested.
| 2023-07-13T11:22:52-0600 | |
| Chip Leadbetter |
File details come from the government source that posted it. Updated .