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SENT BY:A9uaGeascience Inc. 7-26-93 10:01AM 80=81i2c-4 I <br /> 4 1SW <br /> lit <br /> San Joaquin County PubliC Health Servloes JUL 2 6 1993 <br /> Environmental Health Division <br /> 445 N. Sen Joaquin EN1N HFALTM <br /> Stockton, CaMornle 95201 ENP MMISERVICEs <br /> Alin: Me. Mary lift" <br /> Re: Addendum to Wodgmlan dated July, 1983 for Thismenn's Service, 106 West <br /> Second Street. Ripon, California <br /> Dew Ma. Meaye: <br /> Pursuant to our phone aomrenmation on July 22, 1999 a tamer,dated May 19, 1993, <br /> was submitted by San Joaquin County Public Health Servikmes requiring that three (3) <br /> groundwater monitoring wells be installed at the sutm)set property. The srmope of <br /> services, of the original worhpian, has been amended to Include the additional work <br /> required. The methods for groundwater monlloring well Installation, purging, <br /> developing and sampYng are also described as foilowa: <br /> SCOPE OF SERVICES (Additional) <br /> lmmdatlon afthree (3) groundwater monitoring wsils; <br /> • Develop groundwater monitoring walla; <br /> ' Purge groundwater nmonitaring wells; <br /> Collect groundwater samples using a disposable beller MW phm in <br /> containers suppled by the laboratory with the appropriate preservathre <br /> spwMsd for analyses. <br /> Pursuant to Intimation a ippied to oa by San JoaqLin County, the seasonal high <br /> groundwater Is estimated to be 20 fest below ground surface; however,it Is AGI's <br /> understanding that the depth to water in nearby groundwater nmltorirmg wells Is <br /> approAnm&30 feet, 110 teat of u�mpecSixted acl,soll�agar refusal or encounters g groundwater will be drilled to a depth of ly <br /> groundwater Is encountered,three (3) of the six (6) borsholss will be developed into <br /> groundwater nmhoft wells. One groundwater monitoring well will be Installed In a <br /> presumed upgradkm t tocalion and two will be Installed in the presumed downgradksnt <br /> direction. The three (3) borings converted Into groundwater monitoring wells will be <br /> advanced to approximately 45 feet below ground suriaCW <br />