A04_Groundwater_Study_SOW.pdf

Statement of Work

Install Ground Water Monitoring Wells at Rural Plains 13 June 2023

SCOPE OF SERVICES:

1. Provide three groundwater monitoring wells for the purpose of monitoring water table levels, fluctuations and their impact to the subsurface structure of the historic Shelton House at Rural Plains. Well locations will be staked in the field prior to installation. The wells will be located approximately 8 – 10‘ from the northeast, center and northwest corners of the house.

2. Monitoring wells shall be installed using direct push technology to a depth of 12 feet. Wells will be capped with a removable cap and protected with a well box at grade to prevent infiltration or tampering. All work will be performed in accordance with ASTM D5092/D5092M‐16 Standard

Practice for Design and Installation of Groundwater Monitoring Wells, ISO 22475 Geotechnical investigation and testing – Sampling methods and groundwater measurements, or other accepted practices approved for this type of work in the state of Virginia. Regular monitoring of the groundwater level in the well will be by park staff.

3. The vendor shall provide the following to the COR:

a. Core sample to 12’ depth with documentation of soil types, analysis and report of findings for in‐situ soil sampling results.

b. A written report of results/technical memo in accordance with standard practices.

c. Results of a percolation test conducted in each the well casing.

d. Provide results of all subsurface investigations.

LOCATION:

The project is located at:

7273 Studley Road Mechanicsville, VA 23116

SUBMITTALS: Submittals 1 and 2 will be sent to the Contracting Officer’s Representative (COR) prior to use on this project.

1. Site plan at a suitable scale showing location of monitoring wells.

a. Include building location, sidewalks, and significant trees and shrubs

b. Provide grade to the top of the monitoring wells based off the basement finished floor.

2. Information on the monitoring well.

a. Size and depth of well casing.

i. Use smallest size casing as practical utilizing a screw cap on the top and well point/screen at the bottom of well.

ii. PVC material meeting NSF Standard 14 (type WC) is preferred.

iii. Install gravel pack at bottom of well.

PRE‐CONSTRUCTION MEETING: A preconstruction meeting will be held before work begins. The vendor is responsible for scheduling the meeting with the COR after award.