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RAMAGE <br /> ENVIRONMENTAL. Sacramento Office <br /> ' Post Office Box 869 <br /> Rancho Murieta CA 95683 <br /> Tel (916) 354-3250 <br /> September 16, 1999 Fax (916) 354-1786 <br /> Mr Jeffrey Wong, RENS <br /> San Joaquin Count) PHS/EHD <br /> 304 East Weber Avenue, Third Floor <br /> Post Office Box 388 <br /> Stockton, CA 95201-0388 <br /> Re Request for Directive Documentation,Expanded Site Investigation Scope <br /> Former RINO Service Station, 1001 E Yosemite Avenue, Manteca <br /> ' Dear Mr Wong <br /> It was a pleasure to work with you at the above-referenced site on September 2, 8 and 9, 1999 As <br /> you observed, Ramage Environmental completcd the scope of work, as outline in Work Plan, <br /> rPreliminary Investigation and Evaluation, dated May 26, 1999 In addition, as you directed in the <br /> field, Ramage Environmental extended the scope of work to include the following <br /> 1 The work plan proposed that all eleven of the soil borings be advanced to 25 feet However, <br /> based on observed impacted soil at 25 teet, two soil borings (SB-3 and SB-6)were extended to 35 <br /> feet and one soil boring(SB-4)was extended to 30 feet In addition,the continuously cored soil <br /> ' boring SB-7 was extended to 40 feet <br /> 2 The work plan proposed that three soil samples from each of the eleven sotl borings be submitted <br /> for laboratory analysis A total of five additional soil samples from the four extended soil borings <br /> ' were also submitted for analysis, so that the vertical extent of impacted soil could be further <br /> evaluated <br /> 3 The on-site domestic water supply well was opened, monitored and sampled during the <br /> investigation The sampling and analysis of this well was not included in the work pian <br /> 4 The four distal soil borings (SB-8, S13-9, SB-10 and SB-1 l)were not continuously cored, as <br /> proposed in the work plan <br /> ' Thank you for your assistance on this protect To document these field directives,please sign and <br /> date in the space provided below and return a copy to our office in the enclosed envelope If you <br /> have questions or need any additional information, please call me at(916)354-3250 <br /> Sincerely, <br /> RAMAGE ENVIRONMENTAL <br /> ' Joseph Ramage, R G R ulato ireetive Documented By Date <br /> Project Geologist <br /> ' CC Mr R Reed Rinehart—Rinehart Oil, Inc <br />