Laserfiche WebLink
H 0GEOL <br /> A GROUND WATER CONSULTANCY 2005 JUN <br /> N _6 PM 2" 38 <br /> Mr Harlan Knoll, R E H S M§Y A9Y Q%{;sCOUNT <br /> O U N T Y <br /> Semor Registered Environmental Health Specialist E N 1 R 0 M i e4l AL <br /> San Joaquin County Environmental Health Department HEALTH GEPt,r+7t'tENT <br /> 304 E Weber Avenue, Third Floor <br /> Stockton, CA 95202-2708 <br /> RE , Second Quarter 2005 Groundwater Monitoring Report -Former Donna Gardner <br /> Property, 26056126080 North Thornton Road, Thornton, CA <br /> r <br /> Dear Mr Knoll, <br /> This Second Quarter, 2005 Groundwater Monitoring Report is submitted by H2OGEOL <br /> on behalf of R B Construction, Inc for the former Donna Gardner Property, located at <br /> 26056126080 North Thornton Road in Thornton The site location is shown on Figure 1 <br /> 10 POTENTIOMETRIC SURFACE <br /> The depth to water in each monitoring well was measured on April 19, 2005 between <br /> 10 12 and 10 23 hours Depths to water were measured to+/-0 01 feet using a Sohnst <br /> Model water level meter The depths to water were converted to potentiometric surface <br /> elevation by subtracting the measured depths to water from the casing top elevations <br /> reported in the September 29, 2003 groundwater monitoring report submitted by <br /> Environmental Restoration Services The depth to water, casing top elevations, and <br /> potentiometric surface elevations are presented in Table 1 All available previous water <br /> level measurements are also summarized in Attachment C <br /> I <br /> Table 2 lasts the slope (gradient) and direction of gradient of the potentiometric surface <br /> for the triangles with a well at each apex for these water level measurements <br /> Figure 2 is a map showing the approximate potentiometric surface for the six monitoring <br /> wells on-April 19, 2005 The potentiometric surface was domed centering in the vicinity <br /> of momt6flAg wells MW-3 and MW-4 (Figure 2) <br /> 2 0 MONITORING WELL PURGING AND SAMPLING <br /> Monitoring well purging and sampling occurred on April 19, 2005 for the Second Quarter <br /> 2005 event Only two of the wells are monitored MW-3 and MW-4 <br /> P 0 Box 2 65 ■ Livermore.Califorma 94551-2165 0 (925) 373-9211 <br />