ARCHIVED REPORTS_ENVIRONMENTAL SITE ASSESSMENT

Home Browse Search

o Although none were observed or reported, USTs for vehicle/truck fueling would be expected to be associated with the historical usage as a large (apparent) agricultural products warehouse from approximately 1960 to the early 1980s, and then as a roofing manufacturer until 2007. However, it should be noted that much of the property has been paved or re-paved since its historical usage as a warehouse, limiting observations of historic conditions. PEI observed numerous patches within the paved surfaces, which could be related to repairs, or possibly, USTs that have been removed. A geophysical survey is recommended to evaluate the property for evidence of possible unknown USTs. o A railroad spur extends onto the western side of the subject property from the south adjoining property and formerly served the main subject building since construction in approximately 1960. During the site visit, no obvious evidence of hazardous material spillage or contamination was observed along the railway; however, the spur area was partially covered by dense weeds, and had also been paved at some point in the past. An electric winch for moving rail cars was observed in this area. The winch equipment may contain oil, which should be properly disposed of if no longer to be used. Should the subject property be re- developed, or if significant soil disturbance is to occur in the vicinity of the railroad right-of-way, it is recommended to evaluate the soils in the affected area for potential hazardous constituents used for track maintenance (e.g., metals, petroleum and non- petroleum hydrocarbons). Should elevated levels of contaminants be found, appropriate mitigation measures should be taken. o Significant portions of the property have been altered and/or improved from their earlier states,including various generations of paving, alterations and additions to the main building, removal of equipment and ASTs, alterations to storm drain systems, etc. In addition several interior and exterior areas were covered by large quantities of demolition and recyclable materials, and significant weed growth covered exterior areas. These limitations to observations have the potential to impact PEI's conclusions. In addition to the subsurface investigation recommended above to reduce uncertainty about the potential historical usage impact, after removal of the abandoned materials and weed growth, a re- inspection of the property is recommended. ♦ May 2008 — Transaction Screen Assessment (TSA), prepared by Lush Geosciences Inc. (LGI). ♦ 1997 — A Phase II investigation cited in Lush (2008) included 3 soil borings with soil sampling to 10 feet below ground surface (bgs). Total recoverable petroleum hydrocarbons (TRPH) were detected up to 1,900 parts per million (ppm) but not reported to a regulatory agency. Limited Phase II Environmental Site Assessment Report Pinnacle Environmental,Inc. 248 Industrial Avenue,Stockton,CA 95206 Page 10