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V2 ARCADIS ARCADIS U.S.,Inc. <br /> Infrastructure Water-Environment Buildings 1410 Rocky Ridge Drive <br /> Suite 330 <br /> Roseville <br /> California 95661 <br /> Tel 916 786 0320 <br /> Mr.Tom Olson Fax 916 786 0366 <br /> Department of Toxic Substances Control (DTSC) www.arcadis-us.com <br /> Brownfield and Environmental Restoration Program <br /> 8800 Cal Center Drive <br /> Sacramento, CA 95826 <br /> ENVIRONMENT <br /> Subject: <br /> Work Plan to Delineate Soil Contamination in the Ag Chem Area <br /> Former OCC Lathrop Facility, 16777 Howland Road, Lathrop, California <br /> Voluntary Cleanup Agreement Docket Number HSA-VCA 10/11-097 Date: <br /> May 1,2012 <br /> Dear Mr. Olson: Contact: <br /> Ms. Liz Sewell <br /> On behalf of Glenn Springs Holdings, Inc. (GSH),ARCADIS, U.S. (ARCADIS) is <br /> submitting a draft work plan to delineate soil contamination in the Ag Chem Area of Phone: <br /> the Former Occidental Chemical Corporation (OCC)facility in Lathrop, California. 916.786.5535 <br /> Email: <br /> The proposed scope of work is consistent with our discussion at a project scoping liz.sewell@arcadis-us.corr <br /> meeting on March 7, 2012(Task 1 of Voluntary Cleanup Agreement[VCA] HSA-VCA <br /> 10/11-097).Approximately 23 soil borings will be advanced during the first phase of Our ref <br /> investigation,followed by up to 20 contingency borings in a second phase.Additional RV009840.0003.00012 <br /> sampling will be conducted if needed to delineate soil contamination within the Ag <br /> Chem Area. <br /> The results of the supplemental investigation will be used to complete the risk <br /> evaluation and cleanup level determination,feasibility study and remedy selection <br /> documentation (Tasks 2 through 4 of the VCA).As discussed during the meeting, <br /> this work plan also summarizes historical investigations and interim remedial actions. <br /> ARCADIS will initiate the supplemental soil investigation upon concurrence from the <br /> DTSC. If you have any additional questions, please contact me at(916)786-5535 or <br /> via email at liz.sewell@arcadis-us.com. <br /> Imagine the result <br /> 2012.05 01 cover letter to dtec regarding agchemarea investigation work plan.docx <br />