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p E R S NEII.O. AI\�RSON & ASSOCIATES, INC. .., <br /> G3OTECIINICAL•ENVIRONMENTAL•GROUNDWATER•INSPECTIONS•TESTING•LABORATORY SERVICES <br /> y H SACRAMENTO OFFICE CORPORATE OFFICE <br /> 4229 Northgate Boulevard,Suite 3 22 Houston Lane <br /> ,t Chico (530)891-6304 Sacramento,California 95834 Lodi,California 95240 <br /> 0 `P MX)CK7VN (209)472-1091 (916)929-9267 (209)367-3701 <br /> S oo G RANCHO CORMVA (916)6314455 FAX:(916)929-9269 FAX:(209)333-8303 <br /> August 26, 1999 <br /> Mr. Dennis Alegre <br /> P.O. Box 829 <br /> Tracy, CA 95378 <br /> Re: Addendum to Soil Suitability trate Loading Study for Our Lady of Sorrows Chapel <br /> SA-97-58 <br /> 8544 Oak Street, Thornton Ca. <br /> Dear Mr. Alegree, <br /> This letter is written in response to the letter addressed to Jerry Thissen from the San <br /> Joaquin County Environmental Health Division mentioning three inadequacies within the Soil <br /> Suitability/Nitrate Loading Study prepared by our office. The letter addressed to Jerry Thissen is <br /> attached for reference. <br /> The letter indicated that the following items need to be addressed and resubmitted for <br /> review and approval from the County: <br /> 1) "The septic system design for the proposed project is lacking within the study. Provide <br /> septic design, per San Joaquin County Sewage Standards, and SA-97-58 project proposal <br /> submitted November 12, 1997." <br /> 2) "The study does not address the high water table of 8-7 feet, known to occur during the <br /> winter months in this area. Provide additional information on this issue with regards to <br /> installation of the septic system and impact on the ground water." <br /> 3) "N at 16.49 mg/1 exceeds drinking water standards of 10 mg/l, and is not acceptable. <br /> Provide mitigating measures to reduce N below the state drinking water standards. A <br /> raised mound system, with soils containing organic material maybe required to reduce the <br /> N value." <br /> Response to Items No. 1 through No. 3 <br /> The scope of our involvement does not include the septic design(Item No. 1) and details <br /> of the septic design need to be provided to the County Environmental Health Division. <br /> High ground water was not addressed in our report (Item No. 2). The Site is located in an <br /> area of the County not directly covered by the County's Spring 1998 Depth to Ground Water <br /> Map. The Spring 1998 Ground-water Elevation Map partially covers the area. An interpretation <br />