Laserfiche WebLink
.., San Joaquin County wool DIRECTOR <br /> Donna Heran, REHS <br /> Environmental Health Department <br /> M ASSISTANT DIRECTOR <br /> n <br /> G <br /> 600 East Main Street Laurie Cotulla,REHS <br /> T' PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 Carl Borgman,REHS <br /> c _;• P Mike Huggins,REHS,RDI <br /> Website: www.sjgov.org/ehd Margaret Lagorio, REHS <br /> Phone: (209) 468-3420 Robert McClellon, REHS <br /> 209 464-0138 Jeff Carruesco, REHS, RDI <br /> Fax: <br /> ( ) Kasey Foley, REHS <br /> WELDON CHURCH MAY 2 3 2007 <br /> 1958 YOSEMITE ROAD <br /> BERKELEY CA 94707 . a 7. i <br /> RE: Weldon Church Property M .b. <br /> 104 West Beverly Place <br /> Tracy, California <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Soil Vapor <br /> Survey Work Plan dated April 25, 2007, prepared and submitted by Advanced <br /> GeoEnvironmental, Inc. (AGE) on your behalf for the above-referenced site. In this work <br /> plan, AGE proposes to collect soil vapor samples in Tedlar bags from eleven soil borings <br /> at total depths of approximately five feet below surface grade (bsg). Two of these soil <br /> borings will be advanced near the north and west sides of the former underground storage <br /> tank location, and nine borings will be advanced adjacent to the north, east, and south <br /> sides of the existing home located at 104 West Beverly Place, Tracy, California. AGE <br /> also proposes to collect soil samples at total depth from four soil borings advanced to <br /> approximately three feet bsg. Two of these borings will be located midway and adjacent <br /> to the north and south sides of the existing home and two of these borings will be located <br /> adjacent to the east side of the existing home. <br /> EHD approves the advancement of eleven soil borings at the proposed locations for the <br /> purpose of collecting soil vapor samples. In addition to analyzing soil vapor samples for <br /> benzene, toluene, ethylbenzene, and total xylenes (BTEX), EHD directs that you analyze <br /> soil vapor samples for naphthalene and methyl tertiary-butyl ether (MTBE) by <br /> Environmental Protection Agency (EPA) SW-846 soil method 8260B, or by ambient air <br /> method EPA TO-15. Reporting limits for all chemicals of concern must be equal to or <br /> below residential Environmental Screening Levels (ESLs) and California Human Health <br /> Screening Levels (CHHSLs) for soil gas published by San Francisco Bay Regional Water <br /> Quality Control Board. <br /> EHD does not approve the advancement of four soil borings to three feet bsg. Instead, <br /> EHD approves a modification presented during a telephone conversation between AGE <br /> and EHD on May 17, 2007, that includes advancing four four-foot continuously cored <br /> borings, beginning at approximately two feet bsg and terminating at approximately six <br /> feet bsg at locations presented in the above-referenced work plan. EHD believes soil <br /> samples collected at total depth from these borings will provide needed information from <br /> the capillary fringe area since groundwater tends to be approximately six feet bsg at this <br /> site. Selected soil samples collected from these four borings will be analyzed for total <br />