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_n <br /> 2 . 11 Distance to adjacent buildings and their water/sewer lines : <br /> The auto repair shop is the nearest building to the tank <br /> sites as indicated on figure 2 . Utility laterals will be <br /> determined prior to initiating any subsurface exploration. <br /> 2 .12 Proposed Assessment/Temporary Abandonment : <br /> To prepare the tanks for temporary abandonment and assess <br /> the subsurface for possible contamination on the Chase <br /> Chevrolet property, Water Work proposes the following scope <br /> of work . <br /> Assessment <br /> 1 . Two angle borings drilled under each tank to an <br /> approximate depth of ten feet below ground surface . <br /> Drilling will be conducted under a C57 license, using a <br /> hollow stem auger drill rig (Figure 4 ) . The proposed boring <br /> %W locations are presented on Figure 2 . The soil borings will <br /> be abandoned by filling with cement grout . <br /> 2 . Drill cuttings will be logged continuously for <br /> characterization of contamination and soil type by Unified <br /> Soil Classification System. Descriptions of soils <br /> encountered will be recorded on a boring/well log and <br /> included within the assessment report (Figure 5) . Two cored <br /> r soil samples will be collected from each boring at the <br /> depth of the tank bottom and at the end of each boring as <br /> �`' per WaterWork 's Protocol (Attachment 1 ) . The soil samples <br /> will be sent to a state certified laboratory for analysis of <br /> benzene, toluene, ethyl benzene, xylenes (HTEX) , total <br /> y.. petroleum hydrocarbons (TPH) by EPA 8015/8020 and oil and <br /> grease by EPA 503E. All excavated soils will be placed on <br /> f plastic sheeting, covered with same and remain on site until <br /> laboratory results are received . Thereafter, a proposal for <br /> treatment or disposal of the excavated material will be <br /> prepared . <br /> 3. All site activities involving potential contact with <br /> hazardous materials ( ie gasoline/waste oil contaminated <br /> soils ) will be conducted in accordance with WaterWork 's <br /> Health and Safety Plan (Attachment 2 ) . <br /> 4. A Problem Assessment report will be prepared according <br /> to Regional Hoard guidelines summarizing the findings of the <br /> Investigation and recommending remedial action alternatives, <br /> as appropriate . The field investigation will be conducted <br /> under the direct supervision of Russell W. Juncal, CA <br /> w.. Registered Geologist No. 3864, who will review and sign the <br /> assessment report . <br /> 5 <br /> �r <br /> 4' <br /> V <br />