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Groundwater Analytical Results <br /> The chemical analytical results of groundwater samples obtained from monitor wells at the Site on <br /> May 23, 1995 are summarized in Table 2. Chemical analytical results indicate that no TPHg or <br /> BTEX constituents were detected at or above the laboratory method detection limits The chemical <br /> data is consistent with the data from the previous quarterly sampling event. Attachment 11 contains <br /> photocopies of the laboratory analytical reports and chain-of-custody forms <br /> Wastewater Disposal <br /> Purge water generated from the groundwater monitor wells was disposed of on-site with approval <br /> from the San Joaquin County Public Health Services. <br /> SITE REMEDIATION <br /> Soil Remediation System <br /> Soil vapor extraction has been selected as an effective technology to remediate the soil impacted with <br /> petroleum hydrocarbons at the Site. The existing soil vapor specifications will be augmented to <br /> reflect the change from internal combustion to catalytic oxidation treatment which will further <br /> decrease levels of petroleum hydrocarbons to levels where granular activated carbon may be used. <br /> A workplan for the installation of the system was submitted to the County it September, 1994 and <br /> approved in October 1994. At tins time permits and equipment for the installation of the <br /> remediation system are being procured. It is anticipated that the installation of the soli remediation <br /> system will be completed during the third quarter of 1995. <br /> This report presents our understanding of existing conditions at the subject Site The conclusions <br /> contained herein are based on the analytical results and professional judgment which are in <br /> accorilance with current standards of professional practice; no other warranty is expressed or <br /> implied SECOR assumes no liability for exploratory borings or data reported by other consultants <br /> or contractors. <br /> Sincerely, <br /> SECOR International Incorporated <br /> �! __ E No.6065 • <br /> Annabel I. Bendz John E. Bower, R.G. '9?Z, <br /> Environmental Technician Senior Geologist OFC <br /> AIB/JEB• ab <br /> Attachments <br /> cc: Harland Knoll, San Joaquin County Public Health Services <br /> Elizabeth Thayer, California Regional Water Quality Control Board <br /> sEavx ftftnwwnd,im Time od Company <br /> g295Man 2 13 July 1995 <br />