comprehensive site investigation and remediation objectives report

Ms. Dawn Caldwell
Village of Romeoville
February 6, 2008
Page 3
GP-01, SM-GP-02, SM-GP-03, and SM-GP-06 were advanced inside the main room of the
Laundromat using a hand-cart mounted 5400 Geoprobe. SM-GP-04 and SM-GP-05 were
advanced in the store room and mechanical room using a pneumatic jack hammer. SM-GP-07,
SM-GP-08, and SM-GP-09 were in the parking lot adjacent to the back door with a truckmounted
6600 DT Geoprobe.
Temporary groundwater monitoring wells were installed to a depth of 16 feet bgs by casing off
the boreholes and inserting 1-inch diameter PVC casing materials into the boreholes. A 5-foot
screen was set in each well across the water bearing gravel unit, completed with solid PVC riser
to the surface. The outer casing was removed after the PVC was inserted to the prescribed
depth, allowing the borehole to collapse around the well casing. The wells were purged prior to
sampling using a peristaltic pump. Groundwater samples were collected using a peristaltic
pump and were preserved with hydrochloric acid. Refer to Attachment A of this report for
monitoring well construction details.
Field Observations
Soils were classified by Mr. Paddock and screened for volatile organic vapors utilizing a
portable photoionization detector (PID). Field activities were performed using V3 standard
operating procedures (refer to Attachment B of this report).
Boring locations were observed to be paved with concrete or asphalt and were underlain with
approximately 6-12 inches of mixed sand and gravel fill (see boring logs in Attachment A). The
fill material was underlain by light gray and brown mottled silty clay with a trace of sand to a
depth of 6-7 feet bgs. The silty clay became less cohesive and increasingly sandy with depth
and was underlain by fractured, weathered dolomite cobbles. Well-rounded, poorly-sorted
coarse sand was observed at 7.5-10 feet bgs and was underlain by fractured dolomite cobbles
interbedded with well rounded, poorly sorted coarse dolomite gravel to a depth of 18.5 feet bgs
or the terminus of the boring.
Refusal was encountered in all of the soil borings advanced within the Laundromat at 6-7 feet
bgs due to the presence of dolomite cobbles. No odors or staining were noted in any of the
borings advanced. PID readings slightly above background were observed at varying depths in
SM-GP-03, SM-GP-07 and SM-GP-08.
Groundwater was encountered at 12 feet bgs. Recharge was immediate in both temporary
monitoring wells and the wells were could not be pumped dry. No evidence of odors or sheen
was noted in the groundwater samples.
Laboratory Analytical Program
Soil and groundwater samples were submitted for chemical analysis to First Environmental
Laboratories of Naperville, Illinois, a NELAC accredited laboratory. A total of ten soil samples
and two groundwater samples were analyzed for VOCs.
Analytical results were compared to Tier 1 soil and groundwater remediation objectives (ROs)
for residential and industrial/commercial properties, specified at 35 IAC, Part 742 Tiered
Approach to Corrective Action Objectives (TACO). Refer to Tables 1 and 2 (attached) for soil
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