Laserfiche WebLink
Page 2 of 2 <br /> Phillips 66 Station No. 5449 September 19, 2014 <br /> 7647 Pacific Avenue <br /> Stockton, California 95207 <br /> lected at <br /> Instead, the EHD is of the opinion that obtain oxygen soil gas samles paluate thedr sk to Ih man heallth <br /> ve <br /> feet bsg to verify previous results and to ygen data to e <br /> and the environment posed by contaminated <br /> be°ubmi tedthis <br /> thissite. <br /> agency byEHD <br /> 20directs <br /> Novembea 2014 <br /> work <br /> plan to collect additional soil gas sample <br /> th at: <br /> Describes the scope of work and procedures to be used for soil boring advancement to <br /> five feet bsg; if soil conditions prevent the collection of soil gas samples at five feet bsg <br /> at locations proposed by Cardno, then describe how Cardno proposes to achieve the <br /> investigation objectives; <br /> Illustrates the proposed soil gas sampling locations on a site map; <br /> Illustrates the soil gas sampling assembly, describing sampling mechanism, materials <br /> and construction of the soil gas borings; <br /> • Specifies the proposed duration of equilibration time between installing the soil gas <br /> sampling assembly and performing additional tasks such as leak checks, purging and <br /> sampling; <br /> • Describes the procedures necessary for soil gas sample collection that includes the <br /> method and duration of the leak test; purging of the sampling system, and volume of the <br /> sampling containers used to collect the soil gas samples; <br /> • Describes the analyses and methods to be performed on the soil gas samples (include <br /> the analyses of naphthalene, oxygen and the leak detector compound in the analytical <br /> list); <br /> • Includes the collection and analysis of one duplicate soil gas sample; <br /> • Includes the submittal of one material blank or provides documentation that the soil-gas- <br /> sample-collection materials proposed in the work plan have been applied at a different <br /> site and the materials have not interfered or contributed to the detection of contaminants <br /> of concern; and <br /> • Describe the boring abandonment. <br /> The EHD will not approve a work plan that simply states that soil gas samples will be collected <br /> in accordance with protocol from the Department of Toxic Substances Control. If you have any <br /> questions regarding this letter, please contact Vicki McCartney at (209) 468-9852 or by email at <br /> vmccartney@sjcehd.com. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental H71tSecialist Engineering Geologist <br /> c: Ms. Jeanne Hornsey, PE, Cardno ATC, 701 University Avenue, Suite 200, Sacramento, <br /> California 95825 <br /> Ms. Cori Condon, PG, California Regional Water Quality Control Board Central Valley <br /> Region, '11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br />