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Mr. Harlin Knoll <br /> San Joaquin Environmental Health Division <br /> July 15, 1996 <br /> Page 2 <br /> each well exceeded the estimated volume, indicating that the cement migrated into <br /> the gravel pack and probably into the surrounding formation as well. <br /> Well Casing Boring Length of Estimated Actual <br /> Well Depth Diameter Diameter Gravel Volume** Volume <br /> Number (ft) (ft) (ft) Pack (ft) (ft3) (ft3) <br /> MW-1 85 0.16 0.67 22 4.1 5.6 <br /> MW-2 85 0.16 0.67 22 4.1 5.6 <br /> MW-3 85 0.16 0.67 22 4.1 5.6 <br /> Capped <br /> Well 1 92 1 0.67 1 1 .0* 1 23* 1 35.1 72.8 <br /> * Assumptions made for capped well volume calculation. <br /> '* Volume includes an estimated 30% porosity for the gravel packed interval. <br /> Note: The estimated volumes in this table differs from the estimated volumes in the table submitted <br /> with the workplan due to a calculation error in the workplan table. <br /> This work concludes our activities at the FMC FranRica site. HSI requests that the <br /> San Joaquin Environmental Health Division provide written documentation of site <br /> closure for our records. Thank you for your assistance with this project. <br /> If you have any questions or concerns, please call me at (916) 853-1800, <br /> extension 109. <br /> Sincerely, <br /> HYDRO-SEARCH, INC. <br /> Gail Bakker, R.G. #6267 <br /> Hydrogeologist <br /> N11HYDRO-SEARCH, nC. A Tetra Tech Company <br />