Laserfiche WebLink
ARTESIAN ENVIRONMENTAL CONSULTANTS <br /> Date January 28, 1992 <br /> Quarterly Groundwater Monitoring - <br /> Sampled Decmber 26, 1991 <br /> Sampled January 21, 1992 <br /> Former Exxon Service Station 7-3330 <br /> TM M <br />' 3128 West Benjanun Holt Drive FJ W <br /> Stockton, Californias <br /> Project No 014-02-01 FEB 2 4 1992 <br />' Prepared for ENVIRONMENTAL HEALTH <br /> PER,v1.1T/A✓R1 11 + s <br />' Ms Marla D Guensler <br /> C&M Engineer <br /> Real Estate and Engineering <br /> Exxon Company, U S A <br />' Post Office Box 4032 <br /> Concord, CA 94524-2032 <br />' This report presents the results of the quarterly monitoring performed on December 26, <br /> 1991 by Artesian Environmental Consultants, Inc (Artesian) at the subject site (Figures 1 <br /> and 2) An addendum report with a brief history of the site, work done during this period <br /> and planned site activities is included as Appendix A, Quarterly Summary Report <br /> GROUNDWATER SAMPLING <br /> On December 26, 1991, Artesian staff measured depth to water and purged monitor wells <br /> MW-3 through MW-6 All groundwater samples were collected accordmg to the Artesian <br />' standard operating procedures for groundwater sampling included in Appendix B, The <br /> field sampling and monitoring forms are included as Appendix C <br /> All purged water was temporarily stored in three 55-gallon containers pending analytical <br /> results The groundwater samples were shipped under chain-of-custody to state-certified <br /> Pace Incorporated of Novato, California <br />' Based on the analytical results reported on January 3, 1992, by Pace Incorporated, the <br /> analytical laboratory, and a discussion on January 20, 1992 between representatives Mr <br /> Greg DeMarzo and Ms Marla Guensler of Exxon Co , USA and representatives Mr <br />' James Jacobs and Mr Matthew Walraven of Artesian Environmental Consultants, MW-5 <br /> was sampled a second time and the groundwater measurements taken on all four wells on <br /> January 21, 1992 by W Matthew Walraven <br />' GROUNDWATER FLOW <br /> Figures 2 and 3 show the potentiometric surface of shallow groundwater based on depth- <br /> to-water measurements taken on December 26, 1991 and January 21, 1992 The <br /> estimated groundwater gradient was 0 0051 feet per foot for both the December and <br /> 100 Shoreline Hwy, Suite 295 B • Mill Valley, CA 94941 • (415) 381-6456 FAX (415) 389-0423 <br />