comprehensive site investigation and remediation objectives report

3.3 INVESTIGATION MONITORING AND EQUIPMENT DECONTAMINATION
A photoionization detector (PID) was used to monitor worker air quality at all sampling locations
and screen soils for possible contaminants using the headspace technique. The PID was
equipped with an 11.7 electron volt lamp and calibrated daily to a 100 parts per million (ppm)
isobutylene to air standard. The headspace technique involves placing a representative portion
of each sample in a Ziploc® quart-sized bag, agitating the sample, and sealing the bag. After
sealing the bag, the sample is allowed to warm for ten minutes. The probe of the PID is then
inserted through the bag and the maximum reading over a 15-second period is recorded in the
field book.
All equipment that directly or indirectly came into contact with sample media was
decontaminated prior to use and between each sample location. This included the macro core
sampler, sampling shovels, mixing bowls, and mixing spoons. Decontamination of sampling
equipment was performed using a potable water and Liquinox ® solution wash, followed by a
potable water rinse, and a distilled water rinse.
3.4 MANAGEMENT OF INVESTIGATION DERIVED MATERIALS
Soil cuttings were disposed at the Site, at the sampling location where generated; any surplus
or visually impacted soils were drummed in DOT approved 55-gallon steel drums. Any purge
water or decontamination water was drummed in DOT approved 55-gallon steel drums for
storage, pending laboratory analysis results. Used personal protective equipment was bagged
and placed in the daily garbage, for municipal disposal, unless suspect of gross contamination.
3.5 SOIL SAMPLING
The following describes the different sampling methods undertaken throughout the Site RECs.
Each method used was decided upon following consideration of data requirements and
necessary field work to be completed for each respective REC.
Borings were advanced by several drilling companies, including Paramount Environmental,
IEPA Office of Site Evaluation (OSE) and Johnson Probing under the supervision of V3’s site
engineer/geologist, using hollow-stem auger and Geoprobe ® direct push soil sampling methods.
Prior to drilling, JULIE performed on-site location of utilities and a private utility locator confirmed
utilities in some locations. Each boring was sampled continuously using a decontaminated 1.5
to 2-inch-diameter, 24 to 60-inch-long macro-core sampler or two foot split spoon sampler.
Each soil sample was collected for headspace screening to determine the presence of volatile
organic vapors, physical description, and possible laboratory chemical analysis. Results of the
headspace screening and visual descriptions were recorded in the field notebook. Based upon
the results of the headspace screening and visual observation, soil samples from each boring
were retained for laboratory analysis relative to the RECs chemicals of concern.
New disposable sampling gloves were donned for each sample collected, and during handling
of sampling equipment. For each recovered soil sample, samples for possible volatile organic
compounds (VOCs) were collected directly from the recovered sample, in accordance with
USEPA SW-846 Method 5035/8260. All samples collected for VOCs were obtained directly
from the recovered sampler at the specified sample interval using a disposable plastic 5-gram
Comprehensive Site Investigation Report V3 Companies, 14
Spartans’ Square Shopping Center May 2010