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Soil Suitability /Nitrate Loading Study Irerracon <br />JPM ® Lathrop, California <br />May 24, 2022 ra Terracon Project No. NA227026 <br />Year <br />Source <br />Description <br />portion of the site, horseshoe shaped pond on the central portion, agricultural <br />land and/or pasture land north and south of the pond. <br />2005 <br />Aerial <br />Developed with the existing residence at the central portion of the site and a <br />mobile home west of the shop building. Remaining land use appears similar <br />to previous years. <br />2006 Aerial <br />2009 Aerial <br />2010 Aerial <br />2012 <br />Aerial <br />Additional mobile added west of the shop building. <br />2016 <br />Aerial <br />Land use appears similar to previous years. <br />2018 Aerial <br />2020 Aerial <br />Based on a review of the historical information, the site appeared to consist primarily of marsh or <br />swamp lands with a structure from as early as 1915, agricultural row crops with a residential <br />structure(s) from the 1930s to 1970s, agricultural land in the 1980s, and developed in phases with <br />the existing mixed pasture, farm and residential land use from the 1990s to early 2010s. <br />1.3 Existing and Proposed Septic Tank Usage <br />1.3.1 Existing On -Site Septic Tank Usage <br />Based on the site plan provided by the client, there are two residential septic systems currently <br />located on the site. <br />1.3.2 Site Specific Permit History <br />Terracon searched the EHD Public Records website and the following EHD permits associated <br />with the site address(es) were identified. <br />Table 2. <br />Summary of Site -Specific Permits. <br />1.3.3 Discussion of On -Site Septic Tank Installation and Repair <br />Based on a review of the EHD records, there were no septic installation or repair permits available <br />for the site. <br />Responsive ■ Resourceful ■ Reliable <br />Leach <br />Permit # <br />Type / <br />Tank Size <br />Leach Line <br />Line <br />Address <br />Seepage Pits <br />(Year) <br />Location <br />(Gallons) <br />Quantity <br />Length <br />(Feet) <br />1410 Frewert Road <br />SR0085091 <br />Perc test <br />— <br />— <br />— <br />-- <br />1.3.3 Discussion of On -Site Septic Tank Installation and Repair <br />Based on a review of the EHD records, there were no septic installation or repair permits available <br />for the site. <br />Responsive ■ Resourceful ■ Reliable <br />