ITEM 5 EXHIBITS A-H - Laserfiche WebLink

4400 Black Avenue Pleasanton, California 648-26-2 Page 8 Agency Name Date Occupant Remarks LPFD 2009 Pacific Bell dba AT&T California Letter from AT&T stating that Site no longer stores or handles hazardous materials in reportable quantities & has no plans for future hazmat storage LPFD 2012 AT&T Hazardous Materials Business Plan- notes storage of lead- acid batteries with approximately 5 gallons of sulfuric acid CPBD 2013 AT&T Permit to construct open canopy structure CPBD 2016, 2017 AT&T Permit to install fire alarm equipment CPBD 2017 AT&T Install HVAC units on roof CPBD 2018 AT&T Permit for partial demo of wall and installation of roll-up door 4.2.2 Geologic Energy Management Division Maps To evaluate the presence of oil or gas wells on-Site and in the immediate Site vicinity, maps available on-line at the California Department of Conservation, Geologic Energy Management Division (CalGEM) website were reviewed. Review of the available map for the Site area did not show oil or gas wells on-Site or on the adjacent properties. SECTION 5: PHYSICAL SETTING We reviewed readily available geologic and hydrogeologic information to evaluate the likelihood that chemicals of concern released on a nearby property could pose a significant threat to the Site and/or its intended use. 5.1 RECENT USGS TOPOGRAPHIC MAP A 1980 USGS 7.5 minute topographic map was reviewed to evaluate the physical setting of the Site. The Site’s elevation is approximately 340 feet above mean sea level; topography in the vicinity of the Site slopes downward gently to the west-northwest. 5.2 HYDROGEOLOGY Cornerstone performed a Preliminary Geotechnical Investigation concurrent with this Phase I ESA that consisted of the advancement of five Cone Penetration Test (CPT) borings to depths of up to approximately 40 feet. Results from this investigation are reported under separate cover. The subsurface interpretations indicate that the subsurface materials primarily consist of clay and silty clay, with some thin sand and silty sand interbeds. Groundwater was not encountered in these borings. Cornerstone additionally reviewed information available from nearby properties on the Water Board’s Geotracker database. Information reviewed from the property located at 927 Main Street in Pleasanton (approximately 1,600 feet southeast from the Site) indicated shallow groundwater was measured up to depths of approximately 37 feet with a northerly flow direction. The subsurface conditions appear to be similar beneath the Site. SECTION 6: HISTORICAL USE INFORMATION The objective of the review of historical use information is to develop a history of the previous uses of the Site and adjoining properties in order to help identify the likelihood of past uses having led to Recognized Environmental Conditions at the Site. The ASTM standard requires the identification of all obvious uses of the Site from the present back to the Site’s first Permit for partial demo of wall and installation of rollPermit for partial demo of wall and installation of roll Site and in the immediate Site vicinity, maps Site and in the immediate Site vicinity, maps California Department of Conservation, Geologic Energy Management California Department of Conservation, Geologic Energy Management were reviewed. Review of the available map fwere reviewed. Review of the available map for the Site area did or the Site area did Site or on the adjacent properties.Site or on the adjacent properties. reviewed readily available geologic and hydrogeologic information to evaluate the likelihood reviewed readily available geologic and hydrogeologic information to evaluate the likelihood that chemicals of concern released on a nearby property could pose a significant threat to the that chemicals of concern released on a nearby property could pose a significant threat to the USGS TOPOGRAPHIC MAPUSGS TOPOGRAPHIC MAP USGS 7.5 minute topographic map was reviewed to evaluate the physical setting of the USGS 7.5 minute topographic map was reviewed to evaluate the physical setting of the Site’s elevation is approximatelySite’s elevation is approximately 340 feet above mean sea levelfeet above mean sea level vicinity of the Site slopes downward downward gently togently to thethe westwest HYDROGEOLOGYHYDROGEOLOGY Cornerstone performed a Preliminary Geotechnical Investigation concurrent with this Phase I Cornerstone performed a Preliminary Geotechnical Investigation concurrent with this Phase I ESA that consisted of the advancement of five Cone Penetration Test (CPT) borings to depths ESA that consisted of the advancement of five Cone Penetration Test (CPT) borings to depths of up to approximately 40 feet. Results from this investigation are reported under separate of up to approximately 40 feet. Results from this investigation are reported under separate cover. The subsurface interpretations indicate that the subsurface materials primarily consist of cover. The subsurface interpretations indicate that the subsurface materials primarily consist of clay and silty clay, with some thin sand and silty sand interbeds. Groundwater was not clay and silty clay, with some thin sand and silty sand interbeds. Groundwater was not encountered in these borings. Cornerstone additionally reviewed information available from encountered in these borings. Cornerstone additionally reviewed information available from nearby properties on the Water Board’s Geotracker database. nearby properties on the Water Board’s Geotracker database. property located at 927 Main Street in Pleasanton (approximately 1,600 feet southeast from the