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STATE OF CALIFORNIA GEORGE DIEUKMEAAN,Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROLBOARD— <br /> CENTRAL VALLEY REGION , y <br /> 3443 ROUTIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> Ms. Diane Hinson 17 May 1989 <br /> San Joaquin Local Health District <br /> P. 0. Box 2009 <br /> Stockton, CA 95201 <br /> PROBLEM ASSESSMENT REPORT WORK PLAN FOR LAM14ERSVILLE SCHOOL AT 16555 WEST VON <br /> SOSTEN ROAD, TRACY, SAN JOAQUIN COUNTY <br /> We have reviewed the 6 February 1989 work plan for site assessment work at <br /> Lammersville School in Tracy. Generally we find the work plan acceptable, but <br /> the proposal lacks some pertinent informati n. The following information <br /> should be included in an addendum to this w rk plan: <br /> 1. Specify well construction details, i . ?. , screen interval , bentonite seal <br /> thickness and location, grout thickne s, etc. A well construction <br /> diagram is recommended and appreciated. <br /> 2. Specify the proposed analytical methods for benzene, toluene, xylene, <br /> and ethylbenzene (BTX&E) and total petroleum hydrocarbon (TPH) analysis <br /> for soil and water. <br /> 3. Submit a Health and Safety Plan. <br /> 4. Data for all ground water and soil sa ples collected at this site should <br /> r be included. This data should be pre ented in table form. <br /> 5. Groundwater Technology, Incorporated, should explain their rationale for <br /> not proposing the installation of an ipgradient monitoring well west of <br /> the tank excavation. The contaminant plume will need to be defined <br /> before an acceptable Problem Assessme t Report (PAR) can be completed <br /> and proper remediation proposed. <br /> We have the following comments on the proposed work which should -_�'be <br /> addressed when the work is conducted. <br /> 1. Freeze and store soil samples not submitted for laboratory analysis for <br /> possible future analysis. <br /> 2. In addition to collecting soil sample at 5-foot interval's, we request <br /> that soil samples be collected at each change in lithology. <br /> If you have any questions, call me at (196) 361-5725. <br /> EDWARD W. JAMES <br /> Engineering Geologist <br /> EWJ:ewj <br />