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Kruzan &ASSOCIATES,INC. <br />.•1=, 4/0/.. <br />=MIL <br />GEOTECHN1CAL ENGINEERING • ENVIRONMENTAL ENGINEERING <br />CONSTRUCTION TESTING & INSPECTION <br />March 28, 2014 <br />Mr. Rod A. Attebery, Attorney at Law <br />Neumiller & Beardslee <br />P.O. Box 20 <br />Stockton, California 95201-3020 <br />RE: Workplan for Limited Excavation Activities <br />Wilson Way Property <br />3931 —4001 North Wilson Way <br />APNs 132-020-08 and -10 <br />Stockton, California 95205 <br />Dear Mr. Attebery: <br />Project No. 014-13157 <br />Pursuant to your request, ICrazan & Associates, Inc. (Krazan) has prepared this Workplan for Limited <br />Excavation Activities to conduct limited excavation activities for remediation of on-site soils on the <br />referenced property (subject site) located at 3931-4001 North Wilson Way, Stockton, California ((see <br />Figure 1). The proposed work is based strictly upon the findings provided in Krazan's October 31, 2013 <br />Revised Phase II Limited Subsurface Assessment prepared for Neumiller & Beardslee and discussions <br />with the client. At this point, the proposed work reportedly will be conducted under a Local Voluntary <br />Cleanup Program, Remedial Action Agreement with the San Joaquin County Environmental Health <br />Department (SJCEHD). <br />INTRODUCTION - WORKPLAN <br />The following is a proposed workplan to conduct limited excavation activities at the above-referenced site <br />(subject site). This work would occur in the vicinity of hydrocarbon-stained surface soil near the western <br />property line. <br />BACKGROUND <br />Based on the findings in the field, and the laboratory analytical reports for the soil samples collected and <br />analyzed during the October 31, 2013 Phase II LSA, no evidence of known significant impact (based on a <br />comparison with established regulatory screening levels) of the constituents of concern (COCs) <br />investigated in the areas assessed was identified with respect to subsurface soil associated with the subject <br />'- the exception of metals (arsenic in composite sample S10, S11, S12, S13) and cobalt (all <br />,) and total petroleum hydrocarbons (TPH) as diesel (TPH-d) and TPH as motor oil (TPH-mo) in <br />215 West Dakota Avenue • Clovis, California 93612 • (559) 348-2200 • FAX (559) 348-2190 <br />With Offices Serving the Western United States <br />014-13157 2014-3-28 WP for Excavanon_Wilson Way Stockton FINAL