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1419 East Charter Way <br /> Page 2 of 2 <br /> log of computer-interpreted soil types to help identify appropriate depths.to collect depth-discrete <br /> soil samples from an adjacent borehole at depths between 50 and 175 feet bgs, and depth-discrete <br /> grab groundwater samples from individual soil borings advanced adjacent to the CPT boring. <br /> Selected soil and groundwater samples will be analyzed for the same analyses mentioned above. <br /> The following information is needed for EHD to evaluate the proposed advancement of three soil <br /> borings to be completed as ozone sparging points screened between 48 and 50 feet bgs: <br /> + How many pounds of ozone are currently being injected daily? <br /> • Would the ozone generator system �be upgraded to accommodate the three new sparge <br /> points? <br /> • Provide hours and percentage of time the ozone system is operational in quarterly <br /> groundwater monitoring reports. <br /> AGE proposes to survey the newly installed monitoring wells relative to a City of Stockton <br /> elevation benchmark and provide well elevation and Global Positioning Systems (GPS) locations. <br /> The State of California — State and Consumer Services Agency on behalf of the California Board <br /> for Professional Engineers and Land Surveyors as to the use of licensed professionals for collection <br /> of GeoTracker XY&Z data has stated that the collection of information related to the exact location <br /> of groundwater wells, required by Title 12, California Code of Regulations 2729-2729.1; <br /> constitutes "land surveying," as the term is defined in section 8726 of the Business and Profession <br /> Code and the collection of data is restricted to those who are licensed to practice land <br /> surveying in California. Among the statutory exemptions are registered geologists or others <br /> persons authorized to practice geology, such as licensed civil and petroleum engineers. EHD <br /> f ssional curve all the monitoring wells <br /> recommends that you have a properly qualified pro e y g <br /> associated with your site and submit the data to GeoTracker and the EHD. <br /> Please respond by February 29, 2008, to EHD's recommendation for relocating the proposed CPT <br /> boring and provide the ozone operating system information. Submit a well permit application and. <br /> s <br /> permit/inspection fee of$383 and access agreement, if necessay, to EHD by February 29, 2008, <br /> for the installation of two monitoring wells and complete the fieldwork by March 31, 2008. If you. <br /> have any questions regarding this letter, contact Vicki McCartney at (209) 468-9852 or by email at <br /> vmccai-tney_�i%sicehd.com. _ <br /> Donna Heran, REHS,Director <br /> Environmental Health Department" <br /> Victoria L. McCartney, Senior.REHS Nuel C. Henderson, Jr:,PG <br /> LOP/Site Mitigation Unit IV Engineering Geologist <br /> LOP/Site Mitigation Unit IV <br /> c: Jessica Rugge -AGE <br /> James L.L. Barton, PG -CVRWQCB <br /> I <br />