AgdaPkt 2000-06-12 - Laserfiche WebLink

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C\I- \ REPORT To the Honorable Mayor and City Council From the City Manager June 12, 2000 Subject Advertisement for Bids - Removal of Stockpile Material at the End of Maple Street Engineering File No. 803-02 Recommendation Adopt a resolution approving the Contract Documents entitled, "Contract Documents for Removal of Stockpile Material at the End of Maple Street", and authorize the advertisement for bids. - Background During the early site and design investigation of the Jefferson Avenue Underpass Project in 1994, and the development of Sequoia Station Shopping Center, it was discovered that several of the adjacent properties were former gas stations or auto repair facilities. Two of these facilities were known to have had underground leaking tanks, or spills that have contaminated the underlying soil. Based on several soil borings, it was discovered that the hydrocarbon contaminates had migrated onto the City's right-of-way within Jefferson Avenue. With the concern of cost overruns and insufficient budget for the Jefferson Avenue Underpass for disposal of contaminated soil, staff proposed to stockpile low concentration of contaminated soil for reuse. Preliminary estimates showed an approximate savings of over $500,000, if the soil could be reused versus disposal at an approved landfill. Working closely with the San Mateo County Environmental Health Office and the San Mateo County Transportation Authority (TA) , staff made provisions for the construction contractor (Dillingham Construction N.A.) to dispose of contaminated soil exceeding acceptable levels, and to stockpile the remaining soil for reuse. The original plan was to stockpile the material and have the San Carlos/Belmont's Ralston, Holly, Harbor Grade Separation project take this stockpile material for their raised railroad embankments. Later, San Carlos/Belmont declined to take the stockpile material after deciding to use the excavated material from San Carlos' New Library. During the past year, staff has been offering the stockpile soil (approximately 25,000 cubic yards) for reuse to other agencies or private parties. Because of the history of this soil, and the conditions that the San Mateo Environmental Health Office has imposed for reuse of the soil (that the soil must remain in San Mateo County and meet reuse concentration levels), our alternatives are limited. Possible sites considered included the renovation at the Palo Alto Golf Course, the renovation at the San Mateo --~-----------y --