Laserfiche WebLink
Y'3 2 1 = <br /> Emcon CI <br /> t A SS OC I AT E S February 20, 1992 <br /> CprsWlanlsr Wasle Project: G67-09 01 <br /> lananemeAl ana <br /> Env ronmenl.conrroi <br />' Ms Jackie Daub <br /> Aegis Environmental, Inc <br />' 1050 Melody Lane, Suite 160 <br /> Roseville, California 95678 <br /> Re. First Quarter 1992 Ground-water Monitoring Report, 4445 Pershing Ave , <br /> Stockton, WIC# 204-7524-2408 <br /> Dear Ms. Doub- <br /> This letter report presents the results of the first quarter 1992 ground-water <br /> monitoring event for the Shell Oil Company (Shell) service station at 4445 <br /> Pershing Avenue, Stockton Monitoring at this site is being conducted on a <br /> quarterly basis. <br /> GROUND-WATER LEVEL SURVEY <br /> On January 21, 1992, static water levels were measured in all site wells before <br /> purging and sampling Water levels were measured to 0.01 foot using an <br /> oil/water interface probe Water-level measurements are presented in Table 1. <br /> SAMPLING AND ANALYSIS <br /> Ground-water samples were collected on January 21, 1992 from monitoring <br /> wells MW-1 MW-2, MW-3, and MW-4. A site map, including the monitoring well <br /> locations, is attached, as provided by Aegis Environmental. Ground-water <br /> monitoring wells were purged before sampling casing a polyw yf Wonde bailer, <br /> a low-flow submersible pump, or a Teflon®bailer. Samples were collected <br /> using a Teflon barter. The procedures used to purge and sample ground-water <br /> monitoring wells were detailed in our November 14, 1991 Proposal to Conduct <br /> Ground-water Monitoring for Shell Oil Company, and are attached for your <br /> information <br /> Samples were cooled with ice packs and delivered, under chain-of-custody <br /> control, to a Shell-approved analytical laboratory for analysis. <br /> 1433 N Market Boulevard Sacramento California 95834 (916) 928-3300 <br />