Laserfiche WebLink
12 October 2020 Adva�ncedGeo <br /> Project No. 20-6164 <br /> Page 6 of 15 <br /> 4.2. GROUNDWATER CONTAMINATION IN THE AREA OF THE SITE <br /> The immediately adjacent and outlying land use for the parcel is agricultural and <br /> residential. Potential groundwater contamination can occur from several sources <br /> including leaking underground storage tanks, septic systems, agricultural activities, <br /> dairies, and stormwater infiltration. <br /> A review of the California Department of Toxics and Substance Control (DTSC) <br /> EnviroStor Database and the Geotracker Web site did not reveal any sites of <br /> environmental concern within a half-mile radius of the subject property. <br /> 4.3. ON-SITE EXISTING WELL DESCRIPTION <br /> There is one existing domestic water supply well on the property. There are no records <br /> on file at EHD or the Department of Water Resources with well construction or installation <br /> information. The onsite well provides potable water to the existing residence and property. <br /> 4.4. CONSTITUENTS BEING TESTED FOR IN THE WATER SAMPLE <br /> Nitrate (NO3) constituents were tested in the existing groundwater supply well at the <br /> subject property. <br /> 4.5. GROUNDWATER SAMPLE COLLECTION <br /> On 01 October 2020, a water sample was collected in an unpreserved 0.5-liter plastic <br /> container from the existing groundwater supply well at 21145 East Sara Lane. The <br /> groundwater sample container was properly labeled, placed in a chilled container and <br /> transported under chain-of-custody protocols to McCampbell Analytical, Inc. (MAI), a <br /> California Environmental Laboratory Accreditation Program (ELAP)-certified laboratory. <br /> The sample was analyzed for Nitrate as Nitrogen (N) and Nitrate as NO3-- <br /> 4.6. GROUNDWATER ANALYTICAL REPORT <br /> Nitrate as N was detected at 1.9 milligrams per liter (mg/1) and Nitrate as NO3- was <br /> detected at 8.6 mg/I in the water sample. The MAI laboratory report (Work Order: <br /> 2010098) with quality assurance/quality control (QA/QC) reports and chain-of-custody <br /> form are provided in Appendix C. <br /> 5.0. SOIL PROFILE <br /> An OWTS Permit was issued for the property by the EHD on 24 September 2020 to <br /> perform a percolation test (Appendix D). On 01 October 2020, a 4-inch diameter hand <br />