Laserfiche WebLink
is <br /> SO <br /> 22 <br /> PRELIMlNAY trYAROGEOLorm A9sE99MF.NT-WORN PLAN <br /> 1300 E.Yosemite Avenue,Manteca,Gallfornls <br /> Delta Project Na.40-88-480 <br /> Page 12 <br /> �.� 4 Moniforing W ll In t II i n <br /> are illustrated on Figure 3. The wells will be <br /> The proposed monitoring well specifications <br /> i_ <br /> constructed of two-inch diameter, Schedule 40 (flush-threaded) PVC blank casing and two-inch <br /> A <br /> diameter,Schedule 40 well screen with 0.010-inch slots. The screened interval of each monitoring <br /> well will extend to approximately 15 feet below and five feet above the water table. Actual screened <br /> intervals and well depths will be determined in the field by a Delta geologist or engineer. <br /> x After installation the monitoring wells will be developed by pumping using the methods described <br /> in Appendix C,Section 1,5. After development,water samples will be collected from each well using <br /> methods described in Section 1.5 of Appendix C. <br /> �.s <br /> 4.4 Chemical Analvsls <br /> 4.4.1 it Chernicol Analysis <br /> i Based on the results of soil-sample screening,soil samples will be selected from each soil boring and <br /> sent to a State-certified laboratory for chemical analysis, The soil samples will be analyzed for <br /> BT£X,EDB,EDC,and TPH using EPA 524.2/8240. Soil samples will be prepared uaing purge and <br /> " trap methods(EPA Method 5030). <br /> m These analyses should indicate whether petroleum constituents are present and will aid in <br /> characterization of the type of any petroleum present(gasoline of diesel fuel). <br /> rt <br /> A 4 2 Ground Water Chemical Analyses <br /> All ground water samples collected will be subjected to the same analyses as described in Section <br /> i.s 4.4.1 using EPA Method 524.2/8240. Ground water samples will be prepared using purge and trap <br /> methods(EPA Method 5030). <br /> i ' <br /> 5.0 SCHEDULE <br /> Delta will proceed with the work outline-i in this plan as soon as approval is obtained. A drilling <br /> crew will be mobilized to drill the proposed borings within two weeks of approval of this plan. <br /> Laboratory analysis of soil and water samples generally requires three weeks. A summary report of <br /> the results, including information on subsurface geology, ground water depth and I'iow direction, <br /> water-supply wells in the area, monitoring well construction details, and recommendation for any <br /> further assessment or remedial activities will be prepared within three weeks after laboratory results <br /> r.=s <br /> ----------- ----- ------------are received.-_..._ — <br />