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• <br />• <br />Ms. Ann Kolata <br />June 15, 2010 <br />S131060.400.0001 <br />Page 2 <br />hydrocarbons (TPH) extended range organics (ERO) were detected in soil samples <br />collected from this boring. Five soil borings are proposed to delineate the vertical and <br />horizontal distribution of TPH -ERO in the vicinity of this boring. <br />Soil Borings SB -SA1 through SB -SA3 (Lathe) — These historical soil borings are <br />located in the northwest portion of the former Lathe building. Elevated concentrations of <br />TPH -ERO were detected in soil samples collected from these borings. Five soil borings <br />are proposed to delineate the vertical and horizontal distribution of TPH -ERO in this <br />area. <br />Former UST 72 -A (Lathe) - One soil sample collected during the closure of this UST <br />exhibited a concentration of TPH -ERO exceeding the soil migration to groundwater <br />pathway. Five additional borings are proposed to delineate the vertical and horizontal <br />distribution of TPH -ERO in this area. <br />Former UST B -1 (Huckins) — Three soil samples collected during the closure of this <br />UST exhibited elevated concentrations of TPH -ERO. An additional five soil borings are <br />proposed to delineate the vertical and horizontal distribution of TPH -ERO in this area. <br />Specific Scope of Phase H Work <br />Hull proposes to perform the following tasks to address the objectives of the Phase II ESA, as <br />described below: <br />Task 1 Historical Data Review and Compilation; Generation of Phase II ESA Scope <br />of Work and Health & Safety Plan; Project Management <br />Hull has reviewed a significant volume of historical documentation to develop this Scope of <br />Work and clarified certain data with Weaver -Boos Consultants, LLC, the City's consultant <br />charged with oversight of environmental matters during demolition activities at the Site. Hull will <br />also generate a Site - specific health & safety plan that will be followed during implementation of <br />the Phase II ESA Scope of Work. This task includes time to coordinate with the laboratory <br />retained by the demolition contractor for electronic data deliverables of analyses conducted <br />during demolition and sampling activities. Finally, this task also includes project management <br />duties including coordination with the laboratory and drilling subcontractors. <br />Task 2 Intrusive Phase II Investigation of Soil <br />The primary elements of the intrusive investigation include: <br />direct -push soil borings to anticipated depths of approximately 20 ft. below <br />ground surface (bgs); <br />2. analysis of one surface sample and, as applicable, one subsurface soil sample <br />per soil boring - collected using a direct -push drilling rig — and to be tested for: <br />up to 49 samples collected at 20 soil borings, including quality <br />assurance /quality control (QA/QC) samples, for TPH -ERO analyses using <br />Method SW 846 8015M; <br />• up to 32 samples collected at 20 soil borings, including QA/QC samples, for <br />