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f t <br /> Ripon Farm Service Incorporated. Page 2 <br /> 932 East Frontage Road August 27, 2008 <br /> Ripon, California 95366 <br /> of clay or soil with a vacuum exceeding approximately 10 inches of mercury or 136 inches <br /> of water, the continuously cored boring should be extendeCan additional five feet to <br /> identify permeable zones." Section 2.2.6 states that "For probes installed with the direct <br /> push method where the drive rod does not remain in the"`ground, purge volume test, leak <br /> test, and soil gas sampling should not be conducted for at least thirty minutes following <br /> probe installation." <br /> ,e <br /> Although soil gas reporting limits have not been provided in the work plan, soil gas <br /> reporting limits for all chemicals of concern must be less than or equal to residential <br /> Environmental Screening Levels (ESLs) and California Human Health Screening Levels <br /> (CHHSLs) for soil gas published by San Francisco Bay Regional: Water Quality Control <br /> Board. <br /> { <br /> When applying isopropyl alcohol, the leak-check compound must be applied at every <br /> location where ambient air can enter the sampling system, immediately before sampling, <br /> and not just applied to the ambient air contained within the plastic covering. <br /> Please submit a boring permit application and permit/inspection fee of $404 to the EHD <br /> and complete the fieldwork by November 5, 2008. Notify the EHD at least seventy-two <br /> hours prior to the scheduled fieldwork so an inspector can'be present. Please contact Vicki <br /> McCartney, Senior Registered Environmental Health Specialist; at (209) 468-9852 or by <br /> email at vEmccartnevLa)sicehd.com if you have any questions. <br /> Sincerely, <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered EnvironmentalHthSpecialist Engineering Geologist <br /> j <br /> ;E <br /> c: Mr. William R. Little, Advanced GeoEnvironmental, Inc., 837 Shaw Road, Stockton, <br /> California 95215 <br /> Mr. James L.L. Barton, PG, California Regional Water Quality Control Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br /> r <br />