Reso13 PC 13-09 2859 Initial Study Mitigated Negative Declaration Kensington

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Report of Phase I Environnzental Site Assessnzent June 18, 2008 PSI Project Nun2ber 865-8E039 Facility Name 2762 Coast Oil Stations (Oil Map ID No. A2, A3, &A4 Changers) Adjacent (across Oakwood Distance Address 2762 EI Camino Real Direction Drive) Redwood Cit , CA North gallon) in 1960. PSI completed a file review at the San Mateo County Health Services Agency Environmental Protection Division (SMEPD), which indicated that the three USTs were removed from the property by Fuller Excavating and Demolition in September 1985. The former USTs are approximately 60 feet from the Subject Property and hydraulically cross to down gradient. The tank removal was completed under the supervision SMEHD with a note in the file indicating that the tanks removed were in good shape with two soil samples collected from beneath the tank excavation. The soil samples were analyzed by Trace Analysis Laboratory, Inc. for Gasoline Volatile Hydrocarbons with the results being 29 and 41 milligrams per kilogram (mg/kg). In a letter dated July 3, 2001, SMEPD stated that no further action is required associated with these tanks. Based on the closure documentation, contaminants of concern, groundwater flow direction, and distance from the Subject Property, PSI does not believe that the former USTs represent an environmental concern to the Subject Property. The SWEEPS UST listing appears to be associated with the installation of a 500-gallon waste oil UST in 1993. Files at the SMEPD indicate that as of 2003, two 500-gallon inactive waste-oil USTs are still present at the subject property. It is unclear whether there are two USTs or whether the listing is for the same UST. Based on lack of evidence of a release, contaminant of concern, distance, and groundwater flow direction, PSI does not consider the SWEEPS UST listing to represent an environmental concern at this time. EDR reported non-adjoining properties surrounding the Subject Property. PSI considered the listed sites unlikely to impact the Subject Property, based upon factors including (but not limited to): • The nature of the listing, • The use of the site, • When the site was listed and its current listed status, • The developmental density of the setting, • The distance between the listed and Subject Property as related to the distance that releases are likely to migrate based on local surface and subsurface drainage conditions, • The reported extent of contamination and/or media affected, and • The inferred groundwater movement, 7.2 OTHER REGULATORY INFORMATION 7.2.1 FREEDOM OF INFORMATION REQUESTS PSI attempted to obtain other regulatory information through interviews. Response status to the agencies is tabulated below. 21