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Page 2 of 2 <br /> yMD <br /> T To: Mike Infurna [EH] <br /> Subject: Beacon #3641,.1210 E Hammer Lane, Stockton <br /> Mr. Infurna: <br /> This e-mail is in response to your 2 February 2010 letter and the contained request for proposal (due by 5 <br /> March 2010)for a soil gasinvestigation between the UST pit and the site building. <br /> Horizon submitted a work plan for a soil gas investigation dated 30 October 2009 that proposed five soil <br /> gas probe locations as shown on the attached work plan figure. In your letter.of 16 November 2009, EHD <br /> suggested that the risk of vapor intrusion could be addressed with a technical justification instead of a. <br /> physical soil gas investigation. Horizon submitted the techn.ical.justification dated 29 December 2009.,The <br /> EHD evaluation of the technical justification resulted in the deterrni-nation that the area between the UST pit <br /> i required the physical soil as investigation. <br /> and the site building eq p y g g <br /> t bT END as a new proposal with the <br /> October 2009 work Ian be reevalua ed <br /> Horizon requests that the 30 Oc y p p <br /> q <br /> P <br /> modification that only gas probe robe SG-3 located between the UST pit and the site building (see attached <br /> I <br /> figure) be advanced to satisfy the request in the EHD 2 February 20101etter. Horizon further requests the <br />'r following work plan modifications: use a default 1-apparatus-volume purge prior to sample collection; and <br /> collect only field blank and field duplicate samples to be analyzed in the mobile Iab. <br /> r Horizon requests that this e-mail satisfy the proposal submittal deadline of 5 March 2010. <br /> Please advise Horizon of your response to these requests and contact Horizon if you have any questions. <br /> Thank you, <br /> Rexford Smith <br /> Professional Geologist No. 5307 <br /> HORIZON ENVIRONMENTAL INC. <br /> 4970 Windplay Drive, Suite 5 <br /> El Dorado Hills, California 95762, <br /> (916) 939-2170 - <br /> (916)939-2172 FAX <br /> 4/20/2010 <br /> `___---. <br />