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12958/12970 E Jahant Road Project No. 2022-00037 Page 14 <br />No groundwater was encountered by the staff of Petralogix, Inc. during the percolation test hole <br />auguring on June 14, 2022. <br />4.2 Potential Groundwater Contamination Issues <br />No above- or below -ground off-site potential or known sources of contamination were identified <br />from current uses of the surrounding properties, except for the following: <br />• Surrounding properties are used for agriculture; agricultural chemicals may be applied to <br />these properties. <br />• The site and surrounding properties utilize septic systems. <br />The site is located within an agricultural region; groundwater contamination can result from <br />activities related to farming practices where chemicals are applied to crops which may permeate to <br />groundwater. The site and surrounding properties utilize septic systems; leakage from septic tanks <br />or failed septic systems can introduce bacteria to groundwater. <br />4.3 Water Sample Locations and Constituents <br />A domestic well groundwater sample was obtained from the site on June 8, 2022 by Tonya Scheftner. <br />Laboratory supplied containers, an ice -chest, ice, chain -of -custody documentaion, and sampling <br />equipment (plastic gloves, plastic bags) were obtained prior to sampling. The sample was collected <br />after flushing the system with a reduced steady stream for a minimum of five minutes. No filtration <br />system was observed or reported. <br />The well water sample was analyzed for nitrate as nitrogen and DBCP. The analytical methods and <br />results are included in the following table: <br />Table 2. Laboratory Analytica Results, June 8, 2022 <br />1. Based on EPA's MCL (Maximum Contaminant Level). <br />ND = non -detect to laboratory detection limit <br />Bold indicates sample is above the MCL <br />The laboratory report is available for review in Appendix B. <br />4.4 Current and Future On -Site Groundwater Uses <br />The use of groundwater for drinking water is in use at the site and planned for the proposed <br />development. <br />Petralogix Engineering, Inc. <br />26675 Bruella Road, Galt, Ca 95632 <br />(209)-400-5729 <br />www.petralogix.com <br />Analytical <br />Method <br />Units <br />ell <br />rSample <br />MCL <br />Nitrate as Nitrogen) <br />E300.1 <br />110 <br />DBCP IFES24.3 <br />u L <br />ND <br />0.2 <br />1. Based on EPA's MCL (Maximum Contaminant Level). <br />ND = non -detect to laboratory detection limit <br />Bold indicates sample is above the MCL <br />The laboratory report is available for review in Appendix B. <br />4.4 Current and Future On -Site Groundwater Uses <br />The use of groundwater for drinking water is in use at the site and planned for the proposed <br />development. <br />Petralogix Engineering, Inc. <br />26675 Bruella Road, Galt, Ca 95632 <br />(209)-400-5729 <br />www.petralogix.com <br />