SR 05:203 - Laserfiche WebLink

using public transit or carpooling, which in turn results in a lower parking demand. The applicant has stated that the additional parking is needed even though the TDM program has been implemented and E-Loan and the other tenants are encouraging their employees to use commute alternatives. Staff believes that Pleasanton Corporate Commons' TDM program is adequate and believes that the property manager and tenants at the campus have been faithfully following the program to help reduce single occupant vehicles at the site. Therefore, staff can support adding additional parking for the campus. Grading and Drainage The existing grades on the property would essentially stay the same. Staff finds the proposed grading to be minor and acceptable. A portion of the new parking lot would drain into a vegetated swale that would allow contaminants to be filtered from the stormwater before entering the arroyos and, ultimately, the bay. This is the type of stormwater runoff measure strongly supported by the Regional Water Quality Control Board (RWQCB) and local agencies like Pleasanton implementing the urban clean water runoffprogram. Other portions of the new parking lot would drain to an existing vault-type oil/water separator at the Pleasanton Corporate Commons' site or would receive no treatment. Staff notes that although vault-type oil/water separators were used for Pleasanton Corporate Commons when it was developed, the City and RWQCB no longer prefer this treatment method and vegetated swales or retention basins are now the preferred treatment method. Since this site lacks the necessary space for a retention basin, staff recommends that additional areas drain to vegetated swales. For example, the six-foot wide planter strips between the new parking spaces could be designed as vegetated swales. Only those areas that could not drain into the vegetated swales (e.g., due to topography or lack of an acceptable planter area) should be allowed to drain to the vault-type oil/water separators. Furthermore, all of the new parking area needs to be treated. The applicant is also required to enter into an inspection and maintenance agreement to ensure that the stormwater treatment measures function properly over time. Conditions of approval address these items. Landscape Plan While staff finds the location and size of the planter areas to be acceptable and matches the species used on the adjacent Pleasanton Corporate Commons project, staff believes that additional London plane trees need to be planted in order to match the spacing used on the adjacent Pleasanton Corporate Commons project. Staff has conditioned the final landscape plan to include the following modifications: Plant the London plane trees approximately 27 feet on center; Page - 5