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USTEc U.S. Technical Environmental <br /> Consulting, inc. <br /> October 9, 1990 <br /> RECEI <br /> Mr. Steven K. Schneider OCTVED <br /> San Joaquin County Public Health Services �NV�Rt7lytilE 1 , 19.90 <br /> Environmental Health Division <br /> pERMITISERV10ES <br /> P.O. Box 2009 S <br /> Stockton, California 95201 <br /> RE: LETTER ADDENDUM-II TO THE WORK PLAN FOR THE CONTAMINATION <br /> ASSESSMENT AT THE STOCKTON COCA-COLA FACILITY, LOCATED AT 1100 <br /> NORiri viLSON WAY, .ri�.'�C:�':vi:, 0 i.IFORNIA. JOU NO. SU11054. <br /> Dear Mr. Schneider: <br /> This letter is to address the additional work proposed by USTEC for the Coca-Cola facility <br /> located at 1100 North Wilson Way, Stockton, California. The additional work proposed in this <br /> letter should be considered as an addendum to the original work plan dated August 6, 1990. <br /> The original work plan was approved August 24, 1990 by the San Joaquin County Public Health <br /> Services, Environmental Health Division. <br /> The drilling activities proposed in the original and Addendum I work plans were conducted <br /> the week of August 27 and September 10, respectively. During the previous investigations the <br /> lateral limits of soil contamination were defined, however an additional monitoring well is <br /> needed downgradient. This well will be used to further define the lateral limits of potential <br /> groundwater contamination and to characterize the hydrocarbon concentrations in soil. USTEC <br /> proposes to complete the additional work as follows: <br /> o Drilling and sampling approximately seven soil borings to a depth of water table <br /> (about 65 feet) at locations shown on the attached site plan. One of these borings <br /> will be screened from approximately 65 feet to within 5 feet of the surface for use <br /> in a vapor extraction pilot test. <br /> o Drill to three 2-inch PVC vapor extraction monitor wells screened at intervais, <br /> i.e. 5-25 feet, 25-45 feet and 45 to 65 feet, respectively. At the conclusion of the <br /> test all four vapor extraction test wells, as well as any other borings not <br /> completed as a groundwater monitoring well, will be abandoned according to <br /> your requirements. <br /> o Drilling of one boring to about 80 feet and constructing a groundwater monitoring <br /> well. Following installation, this well will be developed and sampled. <br /> 1414 W. Broadway Rd. 0 Ste. 150 0 Tempe, AZ 85282 9 Bus: (602) 829-6311 0 Fax: (602) 829-6315 <br />