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Engineering Department <br /> 38. The project developer's geotechnical engineer shall conduct additional testing to <br /> determine the presence of an isolated or non-isolated lens of high hydraulic <br /> conductivity gravel or similar material located within the proposed bioretention <br /> facility (BMP 1) located on Lynn Drive. The results of the testing shall be submitted <br /> to the City Engineer for review and approval concurrently with the initial submittal <br /> of the on-site grading and utility improvement plans. <br /> 39. The applicant/project developer's geotechnical engineer or civil engineer shall <br /> design the bioretention facility located on Lynn Drive to include an impermeable <br /> membrane that underlays the bioretention facility to limit water infiltration into the <br /> • <br /> underlying soils. <br /> 40. Trees shall not be planted within the bioretention facility located on Lynn Drive. <br /> 41. The on-site grading and utility improvement plans shall include a north-south cross <br /> section through Lynn Drive adjacent to lot 9. The cross section shall start from the <br /> centerline of the Arroyo del Valle and end at a point on the lot 9 pad. At a <br /> minimum, the cross section shall show the AC path, bioretention facility (BMP 1), <br /> street section, and the creek bank setbacks for non-habitable and habitable <br /> structures projected from the toe of the creek bank to the existing or proposed <br /> ground surfaces as recommended in the Updated Seismic Hazards Evaluation <br /> prepared by ENGEO and dated October 21, 2013. <br /> 42. Prior to the first submittal of the improvement plan review, the project developer <br /> shall provide written verification from the County of Alameda County Administrator <br /> that the County of Alameda County Administrator approves the proposed <br /> improvements and public sanitary sewer and water easements as depicted on their <br /> property, APN 946-3485-1-7, on the Preliminary Off-Site Sewer &Water <br /> Improvement plans prepared by Ruggeri-Jensen-Azar and dated January 2016. <br /> 43. The applicant/project developer's civil engineer or land surveyor shall prepare and <br /> submit the grant of public sanitary sewer and water easements (deed, plats, and <br /> legal descriptions) required by the off-site sewer & water Improvement plans to the <br /> City Engineer for review and approval prior to the approval of the off-site sewer & <br /> water Improvement plans, on-site grading and utility improvement plans. <br /> 44. The applicant/project developer shall pay all costs to prepare and record the grant <br /> of public sanitary sewer and water easements required by the off-site sewer & <br /> water Improvement plans. <br /> 45. The project developer's engineer shall submit off-site sewer &water improvement <br /> plans concurrently with the on-site grading and utility improvement plans. All plans <br /> shall be at an equal state of completion. <br /> 8 of 28 <br />