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18201 W Grant Line Road Project No. 2021-00083 Page 18 4.0 EVALUATION OF IDENTIFIED CONTAMINATION SOURCES The subject property may have been farmed; therefore, pesticides and herbicides could have been used on-site. The building observed in the Google Earth aerial dated August 2018 was likely associated with the temporary sales coach permit discussed in Sections 2.2 and 3.1.2. and was removed by April 2018. No staining was observed in the vicinity of the ground mounted transformer observed during the site reconnaissance. 5.0 CONCLUSIONS AND RECOMMENDATIONS The subject property may have been farmed; therefore, pesticides and herbicides could have been used on-site. There is no evidence at this time that agricultural chemicals were applied inappropriately, or that currently banned pesticides were applied historically. Such conclusions cannot be determined without soil sampling and analysis. Such sampling is especially warranted if the land is to be converted into residential use. The building observed in the Google Earth aerial dated August 2018 was likely associated with the temporary sales coach permit discussed in Sections 2.2 and 3.1.2. It is unlikely this structure had lead-based paints or asbestos containing materials. Since no staining was observed in the vicinity of the ground mounted transformer, the transformer is not considered an environmental threat to the subject property at this time. Should the property owners or the EHD be concerned about PCB contamination from the transformer, the energy provider should contacted to test, retrofit, or replace the transformer. As the site is developed, any stained soil or sources of contamination identified should be characterized and properly disposed in accordance with federal, state, and local regulations. 6.0 LIMITATIONS This report was compiled as a Surface and Subsurface Contamination Report for the subject property. This report contains information and data provided to Petralogix by several sources. Petralogix in no way warrants the accuracy or completeness of the information provided to this investigation by those sources. The findings and conclusions of the Surface and Subsurface Contamination Report is not intended to be an all-inclusive comprehensive review. The findings and conclusions of this review are probabilities based on professional judgement regarding the significance of the data gathered over the course of this investigation. It should be noted that when an environmental site assessment is completed without sample collection and quantitative analysis of soil and groundwater beneath the site, such as with this study, no statement of scientific certainty can be made regarding the latent subsurface conditions which may be the result of on-site or off-site sources. Petralogix cannot fully represent that the site or adjoining land contains no hazardous waste, oil, underground storage tanks, Petralogix Engineering, Inc. 26675 Bruella Road, Galt, Ca 95632 (209)-400-5729 www.petralogix.com 9