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The Newark Group, Inc. - 2 - 4 April 2013 <br /> 800 W. Church St., Stockton <br /> San Joaquin County <br /> Analyses will include total petroleum hydrocarbons (TPH) and volatile organic <br /> compounds (VOCs) by Method TO-15 for soil gas, and TPH as gasoline and VOCs by <br /> USEPA Method 8260B for soil and water. The investigation and risk assessment report <br /> will also address all of the 27 February 2013 CSM and low risk closure request <br /> comments, and will be submitted by 30 June 2013. <br /> The Workplan is conditionally approved with the following additions: <br /> • Add naphthalene to Method TO-15 (or use an equivalent method for naphthalene if <br /> your laboratory does not allow additions to TO-15) for soil gas, and also include <br /> naphthalene in the USEPA Method 8260B for soil and groundwater, <br /> • Add TPH as diesel and as motor oil by USEPA Method 8015M or an equivalent <br /> method for soil and groundwater, and <br /> • If the data show screening levels have been exceeded, then conduct a Tier 2 Risk <br /> Assessment using either a Johnson and Ettinger Model or equivalent Tier 2 method, <br /> and include the Tier 2 results in the report with recommendations for remediation, if <br /> appropriate. <br /> Please provide me at least three working days notice prior to conducting fieldwork. You <br /> may contact me with questions by email at jbarton(crD_waterboards.ca.4ov or by phone at <br /> (916) 464-4615. <br /> /s/original signed by <br /> James L. L. Barton, P. G. <br /> Engineering Geologist <br /> cc: David Ascher, The Newark Group, Inc., 20 Jackson Drive, Cranford, NJ 07016 <br /> Bill Doerr, The Newark Group, Inc., 310 W. Water Street, Baltimore, OH 43105 <br /> Eddie Tolentino, The Newark Group, Inc., 2575 Grand Canal, Ste. 2000, <br /> Stockton 95207 <br /> Peter Krasnoff, West Environmental Services & Technology, 711 Grand Ave., <br /> Ste. 220, San Rafael 94901 <br /> Vern Elarth, URS, 100 W. San Fernando St., Ste. 200, San Jose 95113 <br /> Leon Marineau, Cascades Inc., 471 Marie-Victorin, Kingsey Falls, Quebec, <br /> Canada JOA 180 <br /> Chris L' Orange, Dopaco Inc. Representative, Drinker, Biddle & Reath LLP, <br /> 50 Fremont Street, 20th Floor, San Francisco, CA 94105 <br />