Laserfiche WebLink
` Mr. Ken Gillies • • <br /> Gillies Trucking <br /> 3931 Newton Road, Stockton <br /> Page 3 of 3 <br /> remaining boring could be placed in the modeled channel axis between GT-4 and <br /> TB-2 where abundant soil sample data can be utilized to calibrate the CPT data <br /> and grab ground water samples can be obtained to delineate the vertical extent <br /> of impacted ground water. As target depths have not been proposed by UEC, <br /> EHD suggests an initial target depth in the former UST area of 110 to 120 feet <br /> below surface grade to test immediately under the Riverbank Aquitard; the target <br /> depths for the other CPT borings can be adjusted based on site conditions, <br /> assessment and modeling needs to achieve the assessment goals. EHD also <br /> recommends use of a 25-ton CPT rig to maximize the likelihood of achieving <br /> sufficient depths of penetration. UEC's experience drilling on the site should be <br /> utilized to select the proper CPT rig. If you agree with EHD's proposed <br /> assessment depths and with collection of the soil behavior data, the CPT <br /> investigation work plan is approved, otherwise please submit a work plan <br /> addendum with your proposals with the justifications by 16 May 2003. <br /> Please submit a drilling permit application for each parcel with the $89.00 fee for <br /> each parcel to EHD. Notify EHD at least 72 hours before commencing each <br /> phase of fieldwork. <br /> Questions or comments may be directed to Nuel Henderson by mail (address on <br /> letter head), by e-mail at nhenderson@sjcehd.com, or by telephone at <br /> (209) 468-3436. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Nuel C. Henderson, Jr., RG <br /> Margare�io, REHS <br /> Unit IV - Site Mitigation Unit IV Supervisor <br /> cc: James L.L. Barton — CVRWQCB <br /> Victor Cherven — UEC <br />