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Mr. Dave Relos October 3, 2013 Page 3 of 7 . probes will be advanced approximately 20 feet to the north, south, east, and west. Each soil probe will be advanced to the water table (anticipated to be approximately 25 feet). Additional soil probes may be advanced dependent upon site conditions. Three additional soil probes are included as part of this proposal should it be warranted. Soil samples will be collected and field screened for the presence of volatile organic compounds (VOCs) by using a photoionization detector (PID). Water samples will be collected from each probe using a Waterra pump. Unsaturated soil samples with the highest PID levels at the each boring locations and all groundwater samples will be submitted to an analytical laboratory for analysis of the following parameters: VOCs, PNAs (including naphthalenes), lead, and lead scavengers as specified by the IDEM in Table 3.1 of the Remediation Program Guide No monitoring wells are proposed at this time. However, should site conditions dictate (additional soil contamination and likely groundwater impacts are identified), three of the soil probe locations will be converted to 2 -inch diameter monitoring wells constructed of PVC casing. A cost for these wells is included with this proposal. One well will be located within the location of the discovered impact and one well will be located in the direction of the suspected ground water gradient. The top of each well will be completed flush with the ground surface. Top of casing elevations will be surveyed. Ground water elevations will be measured in each well and a general groundwater flow direction will be determined. Each monitoring well will be constructed in accordance with general accepted construction standards and IDEM regulations. For cost estimating purposes, we have assumed that the 8 soil samples and 8 ground water samples will be submitted for analysis. To support a possible closure for this site, Level IV data quality objectives (DQOs) will be met. The IDEM requires the collection of various quality assurance/quality control (QA/QC) samples be collected during site characterization to ensure proper sampling and analytical techniques are being followed. These include a matrix spike /matrix spike duplicate (soil and water), equipment blank, field duplicate (soil and water), and trip blank (water). Weaver Boos estimates that an additional three soil samples and four water samples will be required to comply with QA/QC requirements. The actual number of analyses or parameters for this entire project might require modification based upon conditions encountered in the field and the laboratory analytical results. Any modification to the proposed analytical sampling program as outlined in this task or subsequent tasks will be discussed in advance with the City. Sampling and laboratory analyses will be