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Soil Suitability/Nitrate Loading Study <br /> Schuler Property Tracy, California Irerracon <br /> May 30, 2019 Terracon Project No. NA197026 <br /> 1.3 Existing and Proposed Septic Tank Usage <br /> 1.3.1 Existing On-Site Septic Tank Usage <br /> The following septic permits were available on the EHD website for the site address. <br /> Table 2. <br /> Summary of On-Site Septic Permits. <br /> Leach Seepage Pits, <br /> Tank Size Leach Line Line <br /> Address Permit# Type ilter <br /> (Gallons) Quantity Length Sumps, <br /> (Feet) Beds,Other <br /> 3956 Stoneridge Drive 81-761 Septic 1,200 2 80 — <br /> 3956 Stoneridge Drive 1 89-600 1 Repair — 1 1 1 100 1 — <br /> Based on a review of the on-site permit history, in 1981 the site was equipped with a 1,200-gallon <br /> septic tank with two 80 foot long leach lines. <br /> 1.3.2 Site Specific Permit History <br /> Refer to Section 1.3.1. <br /> 1.3.3 Discussion of On-Site Septic Tank Repair <br /> Based on a review of the repair permit, in 1989 a 100 foot long by three foot wide leach line was <br /> added to the septic system. Refer to Section 1.3.1. <br /> 1.3.4 Existing Septic Tank Usage in the Vicinity <br /> In an attempt to determine the septic system density for the vicinity of the site, our office reviewed <br /> a recent aerial photograph of the property available from GoogleEarthTm. The vicinity of the site <br /> consists of vacant land and residences. The assumption was made that each building/cluster of <br /> buildings has one septic system. Using this method, we determined there are approximately 11 <br /> septic systems within 500 feet of the site. Refer to Section 1.3.5 for a history of septic permits <br /> adjoining the site. <br /> 1.3.5 Septic Permit History in the Vicinity <br /> The following table is a summary of septic permits available on the EHD website for properties <br /> adjacent to the site: <br /> Responsive ■ Resourceful ■ Reliable 5 <br />