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%,/ <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. 1.2 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. The proposed boring locations <br /> are presented on Figure 2 . The soil borings will be <br /> 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 3 ) . Two cored <br /> 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 Protocal (Attachment 1 ) . The soil samples <br /> will be sent to a state certified laboratory for analysis of <br /> benzene, toluene, ethyl benzene, xylenes (BTEX) , total <br /> petroleum hydrocarbons (TPH) by EPA 8015/8020 and oil and <br /> grease by EPA 503E . All excavated soils will be placed on <br /> 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 . A Problem Assessment report will be prepared according <br /> to Regional Board 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 /> Registered Geologist No . 3864, who will review and sign the <br /> assessment report . <br /> Temporary Tank Abandonment <br /> 1 . The three tanks will be Temporarily Abandon Per <br /> Article 2671 of the California underground storage tank <br /> regulations (Attachment 2 ) . <br />