comprehensive site investigation and remediation objectives report

syringe barrel. The barrel was driven into the soil surface to remove the soil without exposure to
air. The 5-gram soil sample was then extruded into one 40-ml vial preserved with methanol.
This process was repeated until two 40-ml vials preserved with sodium bisulfate were also filled
with 5-grams of soil each. The samples were immediately capped, labeled, and placed on ice.
For all additional analysis, the remaining portion of the recovered sample from the specified
sample interval was placed into appropriate laboratory specified jars, labeled with the sample
name, sample location, sample depth (if appropriate), date, time, preservative (if appropriate),
and name of sampler. All samples were then immediately placed in a cooler filled with ice.
A V3 engineer/geologist logged the subsurface conditions encountered using the Unified Soil
Classification System (USCS) (ASTM Method D2488). Additional information that was
documented includes:
• Boring identification
• Location in relation to an easily identifiable landmark
• Name of drilling contractor
• Drilling method
• Depth at which saturated conditions are first encountered
• Headspace screening results
• Sample identification and depths
• Soil weathering
• Zones of caving or heaving
• Refusal.
Soil boring logs are provided in Appendix C. Site photos are presented in Appendix D.
3.6 MONITORING WELL INSTALLATION AND DEVELOPMENT
A total of five permanent and eleven temporary monitoring wells were installed from January
2008 to May 2009 as discussed in Section 3.0 and in later sections of this report (see Figure
3.2). Paramount Environmental, IEPA OSE and Johnson Probing performed the drilling
activities, under subcontract to V3. A hand cart Geoprobe or 6600 DT drill rig was used to install
the permanent groundwater monitoring wells based on site-specific data. Permanent wells were
utilized by V3 for groundwater sampling locations on the Site for reproducible and accurate
groundwater constituent analysis and hydrogeologic analysis.
The permanent groundwater monitoring wells were installed utilizing macrocore or 6-inch
hollow-stem augers (HSA). Following the soil logging, moisture observation, and PID screening,
permanent monitoring well construction was completed by installing a ¾-inch, 1-inch or 2-inch
inside diameter (i.d.) schedule 40 flush-thread polyvinyl chloride (PVC) 0.01-inch horizontally
factory slotted screen at each well location. Schedule 40 PVC riser was attached to the
screened PVC to the approximate ground surface. Permanent monitoring wells were completed
by placing filter pack sand approximately 1-2 feet above the top of screen. Bentonite pellets
were placed within the annular space from the top of the filter pack sand to approximately 1 foot
bgs and a flush-mount well cover was installed to complete the permanent well.
Next, well development included purging the water wells using either a polyethylene dedicated
disposable bailer or by placing disposable polyethylene tubing into the screened interval and
attaching the upper tubing end to a peristaltic pump. The water was purged a minimum of five
Comprehensive Site Investigation Report V3 Companies, 15
Spartans’ Square Shopping Center May 2010