SITE INFORMATION AND CORRESPONDENCE

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i. Ile- T i Mr. Hassan Pejuhesh I`fWoocrd-Clyde Consultants Page 2 February 4, 1988 i, 3) Soil Borin s WCC will advance five soil borings with~hollow stem augers to depths of approximately 60 feet, or 5.0' feet into a clay aquitard below the groundwater surface,iat selected locations on Caltrans property. A sixth boring would extend to a depth of approximately 80 feet. Boring locations will be selected based on the results of the soil gas survey and previous soil and groundwater sampling at the site. OSA is responsible for the disposal of all soil cuttings. WCC will assist GSA's removal of these materials, if desired. 4) Soil Sampling_ Soil samples will be collected at 5-foot intervals in each boring down to a depth of approximately ,i•4O feet, where it is anticipated that groundwater will occur While' drilling. A WCC geologist will log samples from each bor"Ing according to the Uniform Soils Classification System andilabel the samples for transport to the laboratory. Our estimated budget for this work is summarized+ in the enclosed table. PROJECT PERSONNEL J Michael S. Bonkowski , a certified engineering geo�{ logist in California, is the Project Manager. Mr. Bonkowski has over eight.1years experience in aroundwa r g to geology and hazardous waste. He will be responsible for the technical contact and timely completion of the report and the maintenance of schedule and budget. j Mr. Dan Baden, a senior staff geologist, will conduct the field activities. He will be responsible for the day-to-day field activities. Mr. George Ford, a project geologist and certified engineering geologist, will direct the project. He will be responsible for the day-to-day activities. SCHEDULE WCC will initiate work on the project within five days of your h authorization to proceed. We anticipate that the work will require no more than four weeks from start of work. 882904-2 �� iI