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Contract No. 53U495 'bask Order No 10-365101-01 Page 3 E. Work Site I Location The work site is located south of District 10 Headquarters, at 1603 South B Street, Stockton, CA 3. Ownership and Land Use The site is an operating highway maintenance station owned by Caltrans Oper- ational buildings and facilities are shown on the facility map Underground utilities including water, electrical and sewer are located throughout the site There are twelve (12) monitoring wells located on the site 3. Contaminants of Concern Potential contaminants are related primarily to petroleum materials and wastes associated with fueling and servicing of vehicles and equipment used in the high- way maintenance Contaminants of concern are Diesel Gasoline, BTX & E and helogenated hydrocarbons Oil, grease and PCBs II DESCRIPTION OF WORD A. Prework Site Visit The contractor shall provide for a California Registered Geologist and/or Certified Engineering Geologist to accompany the Contract Manager on a prework site visit to the work site The prework site visit shall be held within five (5) working days of acccepting the TO The geologist who attends the prework site shall be the same individual who will be on-site and exercising responsible charge during the investigation No exception to this requirement will be permitted without prior approval of the Contract Manager The purpose of the prework site visit is to familiarize the contractor with the conditions of the work site and to clearly establish the objectives of the TO Technical and background data, along with site mapping, will be discussed and transferred to the contractor for use in the preparing the workplan The required level of the workplan and health and safety plan will be established and agreed on at this visit The draft completion schedule shall be discussed and the contractor may request revisions to the schedule The completion schedule will be finalized within five (5) working days of the prework site visit R. Develop Work Plan The contractor is responsible for reviewing the technical and background data furnished at the prework site visit and shall develop an investigative strategy to be proposed in a draft workplan The draft workplan submittal shall in- clude a copy of the TO Estimated Cost of Work showing any estimated item and quanitity revisions to accomplish the proposed workplan After review and approval by Caltrans, the workplan shall put into its final form incorporating any changes or additions requested