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i <br /> ..ti <br /> PUBLIC*-HEALTH SERVICES <br /> PgUrN. . c <br /> SAN JOAQUIN COUNTY �•:� <br /> ENVIRONMENTAL HEALTH DIVISION y; <br /> Ernest M. Fujimoto, M.D., M.P.H., Acting Health Officer •`. <br /> 304 E.Weber Ave., 3rd Floor • P. O. Box 388 • Stockton, CA 952CID <br /> 209/468-3420 <br /> Lj <br /> DALE STEELE <br /> CALTRANS MAILED SEP 2 041995 <br /> PO BOX 2048 <br /> STOCKTON CA 95201 <br /> Re: Stockton Yard Site Code: 10193 <br /> 1604 South "B" Street <br /> Stockton CA 95205 <br /> San Joaquin County, Public Health Services, Environmental Health Division (PHS/EHD) has completed <br /> review of Caltrans correspondence dated August 29, 1995. PHS/EHD has the following comments for <br /> your consideration. <br /> The correspondence indicated that PHS/EHD agreed in a telephone conversation on August 28, 1995 to a <br /> number of issues which were raised in PHS/EHD correspondence dated August 18, 1995. PHS/EHD <br /> wishes to clarify these agreements in the following discussion. <br /> With regards to PHS/EHD's request for additional soil borings in the area of the former tanks and that these <br /> boring be converted into vapor extraction wells of varying screen intervals, PHS/EHD maintains that <br /> additional soil investigation is necessary to define the extent of soil contamination and once defined that <br /> soil remediation will be necessary. Should Caltrans wish to proceed with the limited scope of work <br /> proposed, and inadequate soil information is provided, PHS/EHD will again direct Caltrans to perform <br /> additional soil investigation. <br /> PHS/EHD did not state that there was no need to place more monitoring wells west of MW3 and VW1. <br /> PHS/EHD agreed to postpone the requirement to define the extent of groundwater contamination with <br /> additional monitoring wells pending sample results from MW11 and MW12. <br /> PHS/EHD understands that quarterly monitoring may not have been included in the present RIMS work. <br /> However, you should note that quarterly monitoring is a regulatory requirement and the information which <br /> will-be obtained will further aid in the placement of the proposed additional monitoring wells in the most <br /> strategic position possible. Should you wish to postpone the initiation of quarterly monitoring of existing <br /> monitoring wells, a request should be made which includes the date that monitoring will be initiated. <br /> Please note that PHS/EHD must be contacted prior to any site activity. If you have any questions, please <br /> contact Mary Meays at (209) 468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> y <br /> Ce <br /> Mary Meays, SeniorR S Diane M. Hinson, REHS <br /> Site Mitigation Unit Supervisor <br /> MM/1604B <br /> cc: Elizabeth Thayer, CVRWQCB <br /> cc: Saiyed Ali, CalTrans <br /> cc: Rick Walls, GeoCon <br /> A Division of San Joaquin County Health Care Services <br />