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WATEkWORK CORP. —��— <br /> A RESNA Company ��—•-A <br /> Environmental Solutions <br /> Through Applied Science, <br /> Engineering&Construction <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone: (209) 838-3507 <br /> Fax: (209) 838-3509 <br /> November 11, 1991 <br /> PEI,, vILL 3 <br /> Ms. Dianne Hinson <br /> Environmental Health Division <br /> San Joaquin County Public Health Services <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Diamond Walnut Growers Inc. <br /> Dear Ms. Hinson: <br /> As we discussed during our phone conversation of October 21, 1991, I am writing to present <br /> a workplan for conducting additional assessment activities at the above referenced site. <br /> Specifically, we propose to perform the following tasks: <br /> 1. Collection of water elevation data and samples from the three onsite monitoring <br /> wells and three adjacent City wells. Each water sample will be submitted to a <br /> State certified laboratory for analysis for total chrome and hexavalent chrome. <br /> The three onsite wells will be purged in accordance with the attached Quality <br /> Assurance/Quality Control Plan. Samples will be collected from the City wells <br /> at the closest sampling port. <br /> 2. Additional data will be collected from published sources and municipal records <br /> with respect to hydrogeologic conditions in the area, including information <br /> regarding background chromium levels in the shallow water zone and the overall <br /> chemistry in the deeper wells. <br /> DWGLIIII.RWJ <br />