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°PQ'UIN' ° SAN JOAQUIN COUNTY <br /> �. �. — .oG <br /> z ENVIRONMENTAL HEALTH DEPARTMENT <br /> N• :, 1868 East Hazelton Ave Stockton, CA 95205 <br /> (209)468-3420 • Fax: (209)464-0138 • Web: www.sjgov.org/ehd <br /> c��iF•oR�`P <br /> Nitrate Loading Study Requirement Checklist <br /> RECORD ID: SR0083595 <br /> SITE LOCATION: 24065 EAST ARTHUR ROAD, ESCALON <br /> REPORT DATE: 04/20/2021 <br /> S = Sufficient San Joaquin County Development Title Chapter 9-1105,Section 9-1105.2 <br /> I = Insufficient <br /> S I 1.0 CHEMICAL AND PHYSICAL PROPERTIES OF SOIL <br /> 1.1 Description of the chemical and physical properties of the soils underlying the site. <br /> F] 0-6 feet—tight sandy loam, high clay content <br /> • 6—10 feet :loamy sand <br /> • 10 feet: Sandy Loam (exceptional permeability) <br /> • 23 feet—High percentage of tight,compact silt <br /> ❑ 1.2 Description of the mass transport properties of the soils underlying the site with respect to nitrate and/or any other <br /> constituent of concern identified for the project site. <br /> • 3.5 feet Nitrate is 2 ppm, <br /> • 23 feet deep the Nitrate-N concentration in soil is 47 ppm <br /> • Nitrogen based fertilizer and ag production have percolated through the sandy soils and accumulates on <br /> tighter soil lens @ 23 feet <br /> 2.0 GROUNDWATER ANALYSIS <br /> ❑ 2.1 Description of: depth to groundwater, seasonal fluctuations of groundwater depth, directional flow and gradient. <br /> • Approximately 85 feet(Spring, 2018) <br /> ❑ 2.2 Description/discussion of any existing or potential groundwater contamination issues in the general location of the <br /> site. <br /> • Dairies surrounding the property <br /> ❑ 2.3 Description of the current use of groundwater at the site and of the future expected use of groundwater as related <br /> to the proposed development project. O�t��''�U`- t '>c <br /> 3.0 SOURCES AND CALCULATED IMPACT OF NITRATE TO GROUNDWATER <br /> ❑ 3.1 Description of all current off-site sources of nitrate to soil and groundwater in the general up gradient area and the <br /> contribution of nitrate load from these sources to the project site. <br /> • Nitrate impact from up-gradient and onsite dairies <br /> • Storm water recharge <br /> ❑ 3.2 Description of impact of rainfall contribution of nitrate load to the project site. <br /> ❑ 3.3 Description of all current on-site sources of nitrate to soil and groundwater and the contribution of nitrate load from <br /> these sources to the project site. <br /> ❑ 3.4 Description of all proposed future on-site sources of nitrate to soil and groundwater and the contribution of nitrate <br /> load from these sources to the project site. <br /> ❑ 3.5 Calculated mass balance of nitrogen loading considering all potential sources identified. Use of <br /> Hanztch/Finnemore, or other appropriate formula/model, if applicable. <br /> • Nitrate Loading:4.3 ppm <br /> ❑ 3.6 Calculated impact of nitrogen loading from site project to down gradient wells, rivers, lakes etc. <br /> EHD 26-02-002 Pagel of 2 Nitrate Loading Study Checklist <br /> 7/14/2003 <br />