Laserfiche WebLink
GEOTECHNICAL <br /> NEIL Q. ANDERSON ENVIRONMENTAL <br /> AN D f1 $ $ O C ( A T E $ IINSPECTIONS & TESTING <br /> LABORATORY SERVICES <br /> POOL ENGINEERING <br /> * ' POST TENSION DESIGN <br /> July 6, 2007 <br /> F1 NOA Project Number: E07096A <br /> rlPage 2 <br /> NITRATE LOADING STUDY <br /> BOZZANO OLIVE RANCH <br /> F1 2774 ARATA ROAD <br /> STOCKTON, CALIFORNIA <br /> SJC APPLICATION NUMBER: PA-07-470 <br /> i <br /> F1 INTRODUCTION <br /> Out office was contracted by Dillon&Murphy Engineering of Lodi to conduct a Nitrate Loading <br /> Study (NLS) for the property at 2774 Arata Road in Stockton, California. Please refer to the relevant <br /> sections of the Soil Suitability Study (SSS) prepared by Dillon&Murphy for introductory project <br /> details, site plan, and location map (Dillon&Murphy, 2007). This Nitrate Loading Study is being <br /> completed in anticipation of requirements from the Environmental Health Department (EHD) of <br /> San Joaquin County. <br /> To expedite San Joaquin County Environmental Health Department(EHD) review, the <br /> formatting of this report has been designed to follow, to the greatest degree possible, the <br /> structure of the EHD's Nitrate Loading Study Requirements Checklist, dated July 14,2003. <br /> F] Because of concern regarding nitrate leaching into ground water from septic systems, a nitrate <br /> loading analysis was required by the EHD for the proposed development to measure the potential <br /> concentration of percolating effluent and rain fall over the long term. Where percolating effluent <br /> F1leaches into the ground,ground water quality may be impacted to some degree should the effluent <br /> reach ground water. <br /> P! The method utilized for the nitrate loading analysis is based on a simple mass balance formula, <br /> discussed in a published article by Hantzsche and Finnemore (1992),which provides a convenient <br /> and simplified method to estimate long-term ground-water nitrate impacts on an area-wide basis. <br /> F1 <br /> Hantzsche and Finnemore found that over a long period of time,water quality in the upper <br /> saturated ground-water zone closely approximates the quality of percolating recharge waters. They <br /> F! believe that their method is a good planning tool to estimate the potential impact to groundwater, <br /> and provides useful information to planners and local officials but with some real limitations. In <br /> F1their article published in Ground Fater,Hantzsche and Finnemore mention that "...the equation <br /> 2 <br /> LODI ■ SACRAMENTO ■ MODESTO j <br /> ! ENVIRONMENTAL DIVISION 902 Industrial Way,Lodi,Califomia 95240 ■209.367.3701 0 209.369.4228 ■www.noar. <br />