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r <br /> GROUND ZERO ANALYSLS, INC. <br /> i <br /> 2291 W. March Lane, Suite 127D <br /> Stockton, California 95207 <br /> Telephone: (209) 952-3481 <br /> Facsimile: (209) 952-9892 <br /> July 9, 1996 <br /> Mr. Bob Sagaser <br /> Tracy Public Works Department <br /> 3900 Holly Drive <br /> Tracy, CA 95367 <br /> Subject: Discharge of Purged Groundwater, 2360 East Street, Tracy, CA <br /> Dear Mr. Sagaser: <br /> As we discussed, Ground Zero Analysis, Inc. (Ground Zero) requests authorization to discharge <br /> approximately 400 gallons of groundwater into the sanitary sewer system at 2360 East Street, <br /> Tracy, California. The groundwater was produced during purging of three groundwater <br /> monitoring wells at the site under the direction of San Joaquin County Public Health Services, <br /> Environmental Health Division (PHS/EHD) as part of a groundwater investigation. <br /> The proposed point of discharge for the purged water is the sewer cleanout or toilet facility in <br /> the existing building, shown on the attached figure. The water is currently stored in an above <br /> ground tank located within the property boundaries. A water sample was collected from the tank <br /> on June 13, 1996 and analyzed for total petroleum hydrocarbons as gasoline (TPHG) and <br /> benzene, toluene, ethylbenzene, xylenes (BTEX). No TPHG or BTEX was detected. <br /> Laboratory reports are attached. No metals analysis was performed because the source of the <br /> groundwater contamination was an observed release of unleaded gasoline. <br /> Based upon our recent telephone discussion, Ground Zero anticipates receiving written <br /> authorization from your office by July 11, 1996. Please call me at (209) 952-3481 if you have <br /> any questions regarding this request. <br /> Sincerely, <br /> Ground Zero Analysis, Inc. <br /> John P. Lane <br /> Senior Geologist <br /> Attachment: Site Plan <br /> Laboratory Report <br /> cc: Mr. Ron Pestana <br /> Mr. John Tague <br /> Mr. Jerry Sperry <br />