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Riddle & Isola, P.C. A Professional Corporation Quail Lakes Executive Office Park Telephone: (209) 952-6262 2291 W. March Lane, Suite 100D " ' Facsimile: (209) 952-9891 Stockton, California 95207 'i Dail: RiddleIsola@Earthlink.net May 8, 1997 Ms. Donna Heran, Director San Joaquin County Public Health Services Environmental Health Division 304 East Weber Avenue, Third Floor P.O. Box 388 Stockton, California Re: Michael Souza Property (APN: 238-080-01) Lammers and Byron Road Tracy, California: Further Regulatory Action Dear Ms. Heran: This office represents Mr. Michael Souza regarding the environmental issues surrounding the above-referenced real property ("Property"). The purpose of this letter is to pursue a request for a no further action letter from your office with respect to the Property. In December, 1994, Mr. Souza voluntarily undertook a subsurface investigation of the Property to determine the environmental impact, if any, to the Property resulting from releases of hazardous waste from the nearby Chevron pipeline. Mr. Souza's voluntary investigation included sampling soils and groundwater at three monitoring wells installed on the Property. Groundwater was sampled from the monitoring wells two additional times, for a total of three groundwater sampling episodes. Except for the detection of polynuclear aromatic hydrocarbons during the first sampling episode, all subsequent sampling episodes have shown all analytes to be below detection limits (See, February 3, 1995 Mill Creek Report enclosed herewith). Additionally, this office corresponded by letter dated April 7, 1997, with Ms. Wendy Cohen of the Central Valley Regional Water Quality Control Board (CVRWQCB) regarding her position on the need for additional environmental investigation at the Property. In a responding telephone call, Ms. Cohen explained that her office has no regulatory jurisdiction over the Property because she believes no contamination or threat of contamination to groundwater exists at the Property. As a result, Ms. Cohen represented that her office has no say over any environmental investigation at the property. Thus, according to the CVRWQCB, no contamination or threat of contamination exists at the Property sufficient to cause the CVRWQCB to act.