Laserfiche WebLink
' Ms. Mary Meays Page 2 <br /> January 15, 1992 <br /> handling sampling equipment and sample bottles. Bader cord was <br /> ' replaced before sampling at each well location. <br /> Water samples collected at the site were transferred to Curtis & Tompkins, <br /> Ltd., Berkeley, California under chain of custody At the laboratory, the <br /> ' samples were analyzed according to the following test procedures: <br /> • Total Petroleum Hydrocarbons as Gasoline -- EPA Method 8015-M, <br /> • Benzene, Toluene, Ethylbenzenes, and Xylenes (BTE&X) -- EPA Method <br /> 8020; <br /> ' • Total Lead -- DHS Specified Method, <br /> ' • Organic Lead -- DHS Specified Method, and <br /> • Ethylenedibromide (EDB) -- DHS Specified Method <br /> ' The findings from the laboratory testing are summarized in Table 2. <br /> Laboratory reports and chain of custody are attached QA/QC procedures <br /> consisted of collecting a field blank and a travel blank The results of the <br /> duplicate and sample blanks analysis indicated all constituents analyzed <br /> for were below detection limits. At the laboratory, standard internal QA/QC <br /> procedures were followed. <br /> FIndings1 <br /> ' Ground water elevation contours (Figure 1) indicate a ground water flow <br /> direction toward the south-southwest. Previously, flow directions were <br /> toward the southwest (Second Quarter) and toward the southeast (Third <br /> ' Quarter) The change in flow direction may be due to the influence of <br /> tidally induced water level changes in the adjacent Stockton deep water <br /> ' channel. Tidal data for the Stockton area is provided in Table 3. <br /> The laboratory findings indicate a very localized increase in concentration <br /> of petroleum and petroleum related compounds in the vicinity of MW-5 <br /> ' The presence of organic lead and EDB was not detected in this quarter nor <br /> was it detected previously. <br /> 1 <br />