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_ _ <br /> ffl <br /> RENEE= Mon= <br /> WE ASSESSMENT WORK PLAN <br /> Shell Station 420 W. Kettlenan Lane <br /> Lodi, California <br /> Regis Project No. 89-053 <br /> page 12 <br /> annulus. <br /> 4.2.2 Monitoring Well l-Development <br /> Each monitoring well will be developed after construction with by <br /> the surge and bail method until the water produced is relatively <br /> sediment-free. If the well is bailed dry during the development <br /> - process, recharge rates will be recorded. No water or." chemicals <br /> will""bp introduced<'into the monitoring wells during well <br /> -develo ment. All-developed water will be' laced in'arum!tan .site <br /> for later disposal pursuant to applicable regulations and shell <br /> policy. <br /> 4.2.3 Ground water ---- ing <br /> A minimum of 24 hours following well development, and after water <br /> levels have been allowed to stabilized in the well, three to five <br /> f _ wetted casing volumes of liquid will be removed from each -well by <br /> bailing with a pre-cleaned PVC bailer. . Measurements. of pH, <br /> i specific conductance, and temperature will be made at regular <br /> intervals during this procedure. Removal" of liquid-from each <br /> well; will,<continue -until the measurement;.of pHiw specific <br /> V i conductance ,,.:andtemperature<-have'stabilized:; A.liquid sample <br /> f will then be collected fron each well with a laboratory-cleaned, <br /> dedicated bailer. Each samnl.e will be appropriately labeled and <br /> stored on ice from the time of collection through the time of <br /> delivery to the laborr'cory. Ground water samples will be trans= <br /> ported to the laboratory and analyzed within the EPA-specified <br /> holding times for therequested analyses. Proper chain-of- <br /> f J custody procedures described in section 4.5.2 will be established <br /> , . and followed. <br /> a <br /> �i 4.2.4 Petroleum lroduat <br /> i petroleum free <br /> If <br /> -� : p product is present in a well, the thickness of <br /> the product layer will be measured by application of a water- <br /> finding paste to a water-level-indicator tape. A sample of the <br /> product will be collected with a laboratory-cleaned <br /> i and transferred to an a teflon bailer <br /> appropriate sample container and subse- <br /> quently submitted to a California-certified laboratory for fuel <br /> fingerprint analysis. <br /> ` 4 2 Groundwater Well Elevation Surve <br /> ------------ -- <br /> Following establishment, groundwater monitoring well heads will <br /> be surveyed:..to establish elevation ofthe well read. Elevations <br /> of well head and top of PVCriser will be documented. The <br /> monitoring well .head 'survey .will be performed by .Tom Morrow <br /> ' surveying, licensed surveyors in the State of California. <br />