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Project No. 034-21033 Page No. 2 developed with paved parking areas, driveways, walkways, and landscaped grounds. The northern portion of the subject site is currently vacant land (a landscaped area historically). Krazan's January 16, 2021 Phase I Environmental Site Assessment Krazan identified the following evidence of recognized environmental conditions (RECs) and potential areas of concern (PAOCs) in conjunction with the subject site: RECs PAOCs According to the records on file with the California Regional Water Quality Control Board (RWQCB), the historical manufacture of decaffeinated coffee at the 230 Industrial Avenue former Nestle facility, the closest boundary of which is located approximately 3,000 feet to the east-southeast of the subject site, resulted in releases of trichloroethene (TCE) which has impacted the subsurface of this property, as well as other proximate and distant properties via several mechanisms, including the discharge of untreated process wastewater likely containing TCE to the City of Ripon treatment plant located 4,000 to 5,000 feet to the southeast of the subject site. Environmental investigations conducted since the 1980s have revealed subsurface soil and groundwater to be impacted by TCE and its degradation products, including cis-1,2- dichloroethene (cis -1,2 DCE) and vinyl chloride, and the 230 Industrial Avenue property is currently an open cleanup program site. Results obtained from an on-going groundwater monitoring program indicate that shallow and deeper water bearing zones are present beneath this property and that groundwater flow is toward the northwest, with groundwater reportedly first encountered at a depth of approximately 30 feet below ground surface (bgs) in early -2021. The 230 Industrial cleanup program site is located to the east-southeast of the subject site and hydraulically cross- to upgradient of the subject site, and the apparently impacted Ripon wastewater treatment plant is located to the southeast of the subject site and thus directly upgradient of the subject site. Krazan's review of historical aerial photographs and historical topographic maps indicates that: 1) a structure was present in the southeastern portion of the subject site in 1915, although this structure was removed from the subject site by 1937, and 2) the northern portion of the subject site has been occupied by the existing former school building and storage building since at least 1937. Additionally, Mr. Larry Stocks, a representative of Bethany Home, the owner of the subject site, indicated that an elderly resident of a Bethany Home facility stated that a hospital historically located on site was destroyed by fire. Historical uses of the subject site prior to 1915 were not reasonably ascertainable utilizing the standard historical resources consulted during this assessment, and it is therefore unknown how long the subject site was occupied by a structure(s) prior to 1915. Mr. Stocks, familiar with the subject site for the past 13 years, indicated that he was unaware of underground storage tanks (USTs) being located at the subject site, and no records of USTs for the subject site are on file with the local regulatory agencies. However, USTs on properties developed in the early -1900s generally would not have been required to register USTs with regulatory agencies, and many of the smaller and/or rural jurisdictions did not have regulatory agencies associated with UST registration during this time period. KRAZAN & ASSOCIATES, INC. With Offices Serving the Western United States 034-21033 WP for LSA Ripon.doc