ITEM 5 EXHIBITS A-H - Laserfiche WebLink

4400 Black Avenue Pleasanton, California 648-26-2 Page 23 Other than typical building maintenance items, no significant quantities of hazardous materials were observed at the Site during our visit. These materials are not likely to significantly impact soil or groundwater quality beneath the Site provided that they are used in accordance with the manufacturer’s instructions. 9.3 FORMER UNDERGROUND STORAGE TANK A 2,000-gallon diesel UST was present on-Site and was used to power an emergency generator. The UST reportedly was installed in 1999 and removed in 2008 under oversight by the Livermore-Pleasanton Fire Department (LPFD). Cornerstone reviewed UST removal documentation that indicated the UST was in good condition during removal and no holes, leaks, or other apparent signs of contamination were observed. Samples collected from the UST pit excavation and stockpiled soil did not contain petroleum hydrocarbons or VOCs. No further subsurface investigation or remedial measures were required by the LPFD following removal. Based on the UST removal documentation and supporting analytical results, the former UST does not appear to have significantly impacted the subsurface. 9.4 AGRICULTURAL USE Although the Site does not appear to have been used for agricultural purposes prior to development as a telephone directory assistance facility in the early 1970’s, it is possible that pesticides may have been applied along the base of existing Site structures during normal maintenance. Residual pesticides in soil may require special handling or disposal considerations during development. For a greater level of comfort, we recommend collection of soil samples to determine if past Site uses impacted the subsurface. 9.5 DISPOSAL OF EXCESS SOIL DURING CONSTRUCTION If contaminated soil is present on-Site, costs associated with disposal of excess soil during construction could be significantly increased. If redevelopment plans will require off-Site disposal of excess soil or on-Site or off-Site reuse of soil, we would recommend evaluating soil quality before purchasing the Site. 9.6 IMPORTED SOIL If planned development will require importing soil for Site grading, we recommend documenting the source and quality of imported soil. The DTSC’s October 2001 Clean Fill Advisory provides useful guidance on evaluating imported fill. 9.7 POTENTIAL ENVIRONMENTAL CONCERNS WITHIN THE SITE VICINITY Based on the information obtained during this study, no hazardous material spill incidents have been reported in the Site vicinity that would be likely to significantly impact the Site. However, as is typical to many commercial areas, several facilities in the vicinity were reported as hazardous materials users. If leaks or spills occur at these facilities, contamination could impact the Site, depending upon the location of the property, the magnitude of the release, and the effectiveness of cleanup efforts. rstone reviewed UST removal rstone reviewed UST removal UST was in good condition during removal and no holes, UST was in good condition during removal and no holes, leaks, or other apparent signs of contamination were observed. Samples collected from the leaks, or other apparent signs of contamination were observed. Samples collected from the UST pit excavation and stockpiled soil did not contain petroleum hydrocarbons or VOCs. No UST pit excavation and stockpiled soil did not contain petroleum hydrocarbons or VOCs. No further subsurface investigation or remedial measures were required by the LPFD further subsurface investigation or remedial measures were required by the LPFD following documentation and supporting analytical results, the documentation and supporting analytical results, the impacted the subsurface. impacted the subsurface. h the Site does not appear to have been used for agricultural purposes prior to h the Site does not appear to have been used for agricultural purposes prior to as a telephone directory assistance facility in the early 1970’s, it is possible that as a telephone directory assistance facility in the early 1970’s, it is possible that pesticides may have been applied along the base of existing Site structures during normalpesticides may have been applied along the base of existing Site structures during normal Residual pesticides in soil may require special handling or disposal Residual pesticides in soil may require special handling or disposal considerations during development. For a greater level of comfort, we recommend collection of considerations during development. For a greater level of comfort, we recommend collection of soil samples to determine if past Site uses impacted the subsurface.soil samples to determine if past Site uses impacted the subsurface. DISPOSAL OF EXCESS SOIL DURING CDISPOSAL OF EXCESS SOIL DURING CONSTRUCTIONONSTRUCTION is present onis present on-SiteSite, costs associated with disposal of excess soil during , costs associated with disposal of excess soil during construction could be significantly increased. If construction could be significantly increased. If redevelopment plans will require offdevelopment plans will require off disposal of excess soil or ondisposal of excess soil or on--Site or offSite or off-Site reuse of soil, we would recommend evaluating soil Site reuse of soil, we would recommend evaluating soil quality before purchasing the Site.quality before purchasing the Site. IMPORTED SIMPORTED SOIL If planned development will require importing soil for If planned development will require importing soil for the source and quality of imported soil. The DTSC’s October 2001 Clean Fill Advisory provides the source and quality of imported soil. The DTSC’s October 2001 Clean Fill Advisory provides useful guidance on evaluating imported fill.useful guidance on evaluating imported fill. TENTIAL ENVIRONMENTAL CONCERNS WTENTIAL ENVIRONMENTAL CONCERNS W