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12172 N Hibbard Road Project No. 2021-00063 P a g e | 4 <br />to these maps, (Plates 6 and 7) in Appendix A, groundwater elevation is approximately -55 feet below <br />mean sea level (msl) in both the fall and spring. The elevation of the land, as previously mentioned <br />in Section 1.1, is approximately 75 feet above mean sea level. Therefore, the depth to groundwater <br />(the difference between the elevation of the Site and the elevation of groundwater), is approximately <br />130 feet below the ground surface (bgs) in the fall and spring. The groundwater in the vicinity of the <br />Site appears to flow to the southeast, at a gradient of approximately 7 feet per mile, toward a cone of <br />depression. <br />No groundwater was encountered by the staff of Petralogix, Inc. during the shallow percolation test <br />hole auguring on June 24, 2021. <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 18, 2021 by Tonya <br />Scheftner. Laboratory supplied containers, an ice-chest, ice, chain-of-custody documentaion, and <br />sampling equipment (plastic gloves, plastic bags) were obtained prior to sampling. The sample was <br />collected after flushing the system with a reduced steady stream for a minimum of five minutes. No <br />filtration 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 18, 2021 <br />Analytical <br />Method Units Well <br />Sample MCL <br />Nitrate (as Nitrogen) E300.1 mg/L 2.0 10 <br />DBCP E524.3 ug/L ND 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.