SR0076726_SSNL - Laserfiche WebLink

Home Browse Search

FThis� RODUCTION issues myinvestigative findings regarding the Nitrate Loading Study conduc7thisprojec . is Study was conducted because of new regulations recently implemented by Joaquin County Environmental Health Department(EHD)to ensure nitrate loading would not be exceeded when new development occurs on a subject Parcel. Specific concerns regarding nitrate loading could potentially occur when second unit dwellings are constructed on comparatively small parcels. Mr. and Mrs. Williams are proposing to construct a new building northeast of their existing residential structure that will be a combination of a metal barn-type structure and a second residential unit dwelling, sometimes referred to as a mother-in-law unit. The 2.00 acre property currently contains only their house. Nearby surrounding land use is rural residential. Land use further from the subject property is predominately agricultural and is illustrated by the attached Google soil map photo. As noted on the attached SJC District Viewer map, the subject property is located 0.5 miles north of the intersection of Copperopolis Road and Fine Road, southeast of the town of Linden, CA. Within the text of this Report, Bolded Section (§)numbers are referenced at the beginning of an applicable Paragraph(s), or Appendix that corresponds with the EHD Nitrate Loading Study Requirements Checklist. Other portions of text may also apply to other sections of the Checklist. The following summarizes the investigative parameters included to complete this report: • Soil chemical testing was conducted on a soil sample retrieved near the property improvement. Physical testing of the soil sample included texture particle size analysis and chemical testing analyses for the constituents that influence nitrate loading. • The nitrate loading to the on-site soils in combination with nitrate impact potential to the underlying groundwater from percolating effluent was quantified through calculations. An assessment of the characteristics of the on-site soils was made to discuss the mitigation of nitrate impact. • A well water sample was retrieved from the existing on-site domestic well for analysis of nitrate and alkalinity. SOIL INFORMATION NLS§ 1.1. The Soil Map indicates the Map Unit Name soil type is #236 and is 85% San Joaq n sandy loam ith the remaining percentages listed as unnamed soil types. As referenced, a soi as retrieved for physical and chemical analyses. The attached texture analysis reveals the on-site soils at the three-ft depth consists of Sandy clay loam,with sand, silt and clay percentages of 48%, 22%and 30%respectively. Therefore,the clay content can be considered significant. Page 1 of 7 Chesney Consulting