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UST#3 Port of Stockton page 2 <br /> Port Road G at 13th St, July 30, 2010 <br /> Daily groundwater sample collection for dissolved oxygen testing was proposed until <br /> data indicated that a relatively constant level is being produced. In addition, quarterly <br /> groundwater sampling for dissolved petroleum hydrocarbons was proposed. The pilot <br /> tests were proposed to be conducted for six months. <br /> The.EHD considers a six-month pilot test as extreme and recommends that if a shorter <br /> period gathers enough data, thatthe field period be shortened. The sampling frequency <br /> proposed for collecting dissolved oxygen samples could also be utilized .for collecting <br /> groundwater samples for dissolved chemicals of concern (COCs), with some <br /> modifications. <br /> By modifying the sampling frequency for-COCs to weekly for the first two weeks, bi- <br /> weekly for the next month, and monthly for the next month, the pilot test may be <br /> completed sooner. - Favorable data from the pilot tests could support the design, <br /> installation, and activation of a full remedial action in much less time. Please consult <br /> with your-hydrogeologist to ascertain if this modification is possible. <br /> The pilot test work plans are adequate and approved. [H&S 25296.10(c)(3)]. <br /> Please contact Mr. James Barton at (916) 464-4615 or by electronic mail at <br /> JBarton waterboards.ca. ov to complete the-requirements to obtain the necessary <br /> permits for injecting oxidants into the groundwater. After. CVRWQCB permitting <br /> requirements have been met, you may submit the EHD Well Permit Application Forms <br /> and fees for review andp rocessing. You will :be notified when the permit has been <br /> issued so you may schedule a date with the drilling contractor. <br /> You may contact Mr. Michael Infurna at (209) 468-3454 if you have any questions. Mr. <br /> Infurna can also be reached by electronic mail at minfurna s'cehd.com. <br /> Michael J. Infurna Jr., REHS Nuel C. Henderson Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Mr. James L. Barton, CVRWQCB <br /> Mr. Mark Owens, SWRCB-CUF <br /> i <br /> Mr. Chris Strong, WGR Southwest, 315 W. Pine St., Lodi, 95240 <br /> I` <br /> I <br />