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Soil Suitability / Nitrate Loading Study <br />Thornton Road Trailer Parking Facility ■ Lodi, California <br />December 15, 2021 ■ Terracon Project No. NA217079 <br />Responsive ■Resourceful ■Reliable 5 <br />Year Source Description <br />1952 Aerial <br />1963 Aerial <br />1975 Aerial <br />1985 Aerial <br />1993 Aerial <br />2003 Aerial <br />2013 Aerial Developed with grape vineyard.2018 Aerial <br />2021 Aerial Vacant lot. <br />Based on a review of the historical information, the site appeared to consist of undeveloped land <br />and/or pasture land from as early as 1910 through the 1930s, row crops from the 1940s to 1990s, <br />a vineyard from the 2000s through 2017 and vacant land from 2018 through the present. <br />1.3 Existing and Proposed Septic Tank Usage <br />1.3.1 Existing On-Site Septic Tank Usage <br />There are no septic systems currently 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 />Address Permit # <br />(Year) <br />Type / <br />Location <br />Tank Size <br />(Gallons) <br />Leach Line <br />Quantity <br />Leach <br />Line <br />Length <br />(Feet) <br />Seepage Pits <br />15413 Thornton Road PA-2100140 Land Use <br />Application <br />------------ <br />Based on a review of the EHD records, there were no permits found for the site address of 15314 <br />Thornton Road; however, a land use record Permit No. SU0014277, Application No. PA-2100140 <br />(SA) dated 2021 was included in the documents. Copies of the EHD records are included in <br />Appendix C. <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 />1.3.4 Existing Septic Tank Usage in the Vicinity