SITE INFORMATION AND CORRESPONDENCE FILE 1

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` hr, !r a ITAL HEA1_1 h OFFViCE Geological Technics Inc. IST .) 2741 Riva Road . : APR 16 AM 11: 39 .Malufo,Cafifo 95351 (209)538-64241Fax#538-5852 April ll, 1997 Project No.: 425.2 Project Name: George's Service (Durham Ferry Rd) Mr. Christopher Stevens State Water Resources Control Board 2014 T Street, Suite 130 P.O. Box 944212 Sacramento, CA 94244-2120 RE: Clarification On--Pre-Approval Letter of Feb. 27, 1997 George's Service, 1600 Durham Ferry Road, Tracy, CA LOP Site Code No.; 1550; USTCFP Claim No.: 8475 Dear Mr. Stevens: On behalf of George and Mei Teranishi of George's Service, Geological Technics Inc. (GTI) is requesting clarification of a couple items on you February 27, 1997 Pre-Approval letter. These points are discussed below. 1. Proiect Preparation - GTI's budget estimated $2430 for this work and you pre-approved $2,100. Our spread sheet also shows that Access Agreements (or Encroachment Permits, i.e., with CalTrans) will be performed on time and materials, which will most likely cause the total charges for this task to exceed $2,430: What portion of the project preparation work do you want GTI not to perform? • The site map for this project includes four parcels and two roadways. The $580 for this task is not out of line for this detailed map. • The work plan conformed to the LOP standard and described with sufficient detail all the work to be performed over the next year. $1,110 is well within reason for this type of work plan. The work being performed out there at this stage of the project is more comprehensive and detailed then the less demanding work that can be performed early in a project. • GTI is placing the new wells on 4 separate parcels, a well permit is required for each location. 2. Risk Evaluation - GTI's budget estimated $10,445 for the risk evaluation and you approved $5,000. There are several items of work that have been approved as components of the risk evaluation, including receptor/well survey, development of model parameters, risk and fate and transport modeling, and report preparation. I will be difficult to submit quality work product at a cost of less then half of the original budget, especially when part of the risk evaluation work is to perform a well survey for a radius of 2000 around the site. What part of the risk evaluation do you want to negotiate with the County to omit? 3. Groundwater Monitoring - Groundwater monitoring approval was limited to only 3 quarters. Our budget gave a per event charge so that the work could proceed as per County instruction without repeated pre-approval applications to you. After these three events are completed, will George's have to request under cost pre-approval another three quarters of monitoring?