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18201 W Grant Line Road Project No. 2021-00083 <br />Page 17 <br />The trash piles observed on site are considered de minimis. <br />3.2 Past On -Site Sources of Contamination <br />No above- or below -ground on-site potential or known sources of contamination were identified <br />from past uses of the site, except for the following: <br />• Aerial photographs suggest the subject property historic agricultural use from at least a 1952 <br />to 1975. Chemicals may have been applied during the farming practice. <br />3.3 Current On -Site Sources of Contamination <br />No above- or below -ground on-site potential or known sources of contamination were identified <br />from current uses of the site. <br />3.4 Past Off -Site Sources of Contamination <br />No above- or below -ground off-site potential or known sources of contamination were identified <br />from past uses of the surrounding properties. <br />3.5 Current Off -Site Sources of Contamination <br />No above- or below -ground off-site potential or known sources of contamination were identified <br />from current uses of the surrounding properties. <br />Petralogix Engineering, Inc. <br />26675 Bruella Road, Galt, Ca 95632 <br />(209)400-5729 <br />www.petralogix.com <br />r1 <br />U <br />Site Visit Observations <br />Pits, Ponds, Lagoons? <br />Stained soil or pavement? <br />None observed. <br />None observed. <br />Solid waste? <br />Several piles of garbage consisting of plastic piping, concrete <br />blocks, and signage advertising home sales were observed. <br />Waste water discharge? <br />None observed. <br />Wells or septic systems? <br />None observed. <br />Vicinity Observations <br />Topography of property and <br />vicinity <br />Relatively flat <br />Current use of adjoining <br />properties <br />North is undeveloped. East is Mountain House Parkway <br />followed by undeveloped land. South is W Grant Line Road <br />followed by undeveloped land. West is De Anza Boulevard <br />followed by residential tract homes. <br />Current land uses in area <br />Agriculture, residential <br />Evidence of past uses? <br />None observed <br />The trash piles observed on site are considered de minimis. <br />3.2 Past On -Site Sources of Contamination <br />No above- or below -ground on-site potential or known sources of contamination were identified <br />from past uses of the site, except for the following: <br />• Aerial photographs suggest the subject property historic agricultural use from at least a 1952 <br />to 1975. Chemicals may have been applied during the farming practice. <br />3.3 Current On -Site Sources of Contamination <br />No above- or below -ground on-site potential or known sources of contamination were identified <br />from current uses of the site. <br />3.4 Past Off -Site Sources of Contamination <br />No above- or below -ground off-site potential or known sources of contamination were identified <br />from past uses of the surrounding properties. <br />3.5 Current Off -Site Sources of Contamination <br />No above- or below -ground off-site potential or known sources of contamination were identified <br />from current uses of the surrounding properties. <br />Petralogix Engineering, Inc. <br />26675 Bruella Road, Galt, Ca 95632 <br />(209)400-5729 <br />www.petralogix.com <br />r1 <br />U <br />