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- ----- -- _ -- The borings will be drilled using a truck mounted drill rig, equipped with hollow stem augers. During the advancement of the borings, soil samples will be collected at five foot intervals for lithologic classification and qualitative field screening, with an organic vapor analyzer (OVA). The OVA measures ionizable compounds in air in parts per million by volume (ppmv). Lithologic classification will be based on the Unified Soil Classification System (USCS). Currently, based on our experience, we anticipate groundwater in the vicinity of the project site to be present at a depth of approximately 10 feet below ground surface (bgs). At this time, we propose to analyze four soil samples (one from each boring) for laboratory analyses. The samples will be collected at approximate depths of contaminated soils noted within the larger excavation (two to eight feet below surface grade) and based on field observations such as soil discoloration and petroleum-like odors. After collection, the soil samples will be labeled, logged on a chain-of-custody, and immediately stored in an iced cooler. The four soil samples will be submitted to a State certified laboratory and analyzed for the following analyses: • Benzene, Toluene, Ethylbenzene, Total Xylenes by EPA Method 8020 [BTEX] • Total Purgeable Petroleum Hydrocarbons as referenced to Gasoline [TPH-G] by EPA Method 8015M • Oil and Grease by EPA Method 5520 • 5 Luft metals (Pb,Ni, Cd, Cr and Zn)by EPA Methods The soil samples will be analyzed on a normal laboratory schedule requiring approximately two weeks (ten working days) for completion unless the optional rush analytical turnaround is requested by the client at an additional charge. Please note that Fitzpatrick Homes intends to destroy these wells as soon as a subcontractor can be scheduled (estimate approximately one week from installation). The temporary wells will be secured by a locked fence and individually secured using a locked pressure cap during this time. Well destruction will be conducted by pulling out the well casing and drilling out the remaining well material. The wells will then be tremmie grouted with a cement bentonite slurry. Task E02 - Groundwater Sampling Water level measurements and survey elevations will be made in the temporary monitoring wells approximately 24 hours after installation. Water levels will be measured prior to purging and sampling the wells. The depth to groundwater will then be measured in each well according to the protocol described in Attachment B. Based upon this data groundwater contour maps will be generated. The surveyor will be licensed and subcontracted through Fitzpatick Homes. 20-YP I-628/2011 P 180 Page A-7 ®2001,Kleinfelder,Inc. July 2,2001