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77Thepurpose <br /> NTRODUCTION AND PROPOSED DEVELOPMENT <br /> this report was toinvestigate the property for real or potential environmental <br /> and report the findings to the Client and the San Joaquin County Environmental <br /> Health Department. This report complies with the San Joaquin County Ordinances, specifically <br /> 9-905.12(a) for a Surface and Subsurface Contamination Report. <br /> The subject property is located one-half mile south of the intersection of Mackville Road and <br /> Liberty Road, on the east side of Mackville Road. Mr. John Shoup, P.L.S. of Shoup Land <br /> Surveying has prepared the Tentative Map for this project,which is found in Appendix A. <br /> According to the San Joaquin County Development Title, a Surface and Subsurface <br /> Contamination Report (SSCR)must be conducted prior to Tentative Map submittal. It is my <br /> understanding the current zoning is AG-40 and there is no proposal to change the zoning. <br /> Interpretation of County Ordinance Section 9-905.12 (a) has been to focus on the subject <br /> property exclusively, unless it is documented or observed that an environmental concern in <br /> proximity to the subject property could potentially affect said property. <br /> This Surface and Subsurface Contamination approaches,but does not completely encompass the <br /> requirements of a Phase I Environmental Site Assessment(ESA) as promulgated by the <br /> American Society of Testing and Materials (ASTM E-1527-00). The Environmental Health <br /> Department recognizes that the Surface and Subsurface Contamination Report is not intended to <br /> completely fulfill the requirements of the Phase I ESA. The Department does however, maintain <br /> that certain components of the Phase I ESA must be applicable to the SSCR, as follows: Section <br /> 7.1.7 of the ASTM Document states under"Sources of Standard Source Information,"that <br /> "information or other record information from government agencies may be obtained directly <br /> from appropriate government agencies or from commercial services." <br /> d§ 1.1,§ 1.2 Mr. Valdemar Olson is proposing to subdivide an existing Parcel containing <br /> 114.51± acres into two Parcels. Proposed Parcel 1 is to be 5.00 acres. Parcel 2 is to be the <br /> "Designated Remainder" and consist of 109.51 acres. A single family residential structure exists <br /> on proposed Parcel 1. It is my understanding that at this point in time there is no proposal to <br /> build a second unit dwelling on this Parcel 1 or on the Designated Remainder. There is obvious <br /> sufficient land arca for a second unit dwelling on Parcel 1, or a primary residence and a second <br /> unit dwelling on the Designated Remainder. <br /> This report addresses and evaluates non-point sources of hazardous materials, as well as potential <br /> point sources. Non-point sources of hazardous materials include potential agricultural chemical <br /> residues and the potential for high nitrate concentrations in the underlying groundwater. Point <br /> sources investigated on the subject property include: on-site domestic and irrigation wells, a small <br /> (-100 gallon)diesel fuel storage tank, and a fertigation systems on the irrigation well,which is <br /> described on Page 5. Agrichemical storage/mixing areas are also discussed. <br /> No chemical analysis was conducted for this investigation, nor was there an inspection of any on- <br /> site or surrounding buildings or asbestos containing materials (ACMs). <br /> Page -2- <br /> Chesney Consulting <br />