Laserfiche WebLink
2. If the imported soil material to increase the leachline trenches/disposal area elevation does not <br /> match the existing native soil characteristics,problems with continuity of permeability between <br /> the two strata could result, including surfacing of effluent at the line of demarcation. <br /> 3. On August 29,2019,the former Director of EHD, Ms. Linda Turkatte, issued a permit for a <br /> septic system repair(See Attached). This project is approximately 2.5 miles southwest of the <br /> subject site. I know for a fact that perc rates in this locale can range from 20-30 min/in, and I also <br /> know for a fact that the water table can be within five feet below grade during the irrigation <br /> season. Ms. Turkatte didn't seem to have much concern regarding an eight-foot separation <br /> distance for this project, so why should my client be held to a different standard? <br /> 4. The LAMP Policy Number Section 9.4.8.,Relevant Lamp Section 8, Page 33, Legal Authority <br /> Code Section: OWTS Policy Approved LAMP SJC Ord. Code, Title 9, Sewage Standards: <br /> "Encroachment Above Groundwater" states that"Bottom of OWTS dispersal systems cannot be <br /> less than 2 ft above groundwater, or bottom of seepage pits, less than 10 feet above groundwater." <br /> Page 33 of the LAMP states that"fast percolation rates are addressed when the initial soil <br /> suitability and nitrate loading study is conducted and mitigations are required as part of the design <br /> parameters. Mitigation can range from engineered fill in the dispersal area to the installation of a <br /> supplemental treatment system. "Sewage Standards Section 10.3.11 requires a minimum five-foot <br /> separation from the bottom of the leach trench to groundwater." As the civil engineer-of-record <br /> for this project,the referenced natural mitigations outlined in Item 1 above were used in the <br /> design parameters, as outlined in my report. <br /> 5. Mr. Ahmed Hussein,retired Command Sergeant Major US Army,who has served our Country <br /> with the upmost distinction,has already spent in excess of$500,000(soil and equipment costs) <br /> raising the building pad 14 feet above surrounding flood plain elevation. The 1997 flood,which <br /> some consider to be a 500 year flood, only discharged approximately two inches of water depth to <br /> the area surrounding the subject property, and this was primarily due to a levee break. If Mr. <br /> Hussein purchased flood insurance at the quoted price of$2k/month, it would take 21 years to be <br /> an approximate equivalent cost to soil importation. Mr. Hussein projects an additional $85,000 <br /> cost in soil importation to increase leachline trenches/disposal area elevation. This is a cost he <br /> should not have to bear. <br /> Comments from Questa Engineering also include the following: "Normally several percolation <br /> tests(3 to 6)are conducted to provide a representative characterization of soil conditions in the <br /> planned leachfield area." It is not"normal"to conduct 3 to 6 perc tests in a leachfield area unless <br /> the engineer has reason to believe, or proof,that there has been changes to the soil characteristics <br /> due to plowing(particularly ripping),there was a very poor water quality source applied to the <br /> area, or the disposal area is unusually large(>0.25 ac). Soils characteristics very rarely change <br /> dramatically in a relatively short distance. <br /> Page 2 of 3 <br /> L _JJ <br /> Chesney Consulting <br />