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' Page 2 <br /> 503 E Tenth St <br />' PHS/EHD agrees that monitoring wells should be installed in order to further <br /> evaluate the contamination noted at this site It is the recommendation of <br />' PHS/EHD that three monitoring wells be installed that will properly surround the <br /> former UST excavation area One well should be placed up-gradient, in the <br /> vicinity of SB-6 Two wells should be placed down-gradient, one between SB-5 <br /> and SB-8, and one near S8-7 With depth to groundwater noted at <br /> approximately 7 feet below ground surface (bsg), the wells should be screened <br /> beginning at 5 feet bsg in order to allow them to encounter first water The <br />' screen interval may extend to 15-20 feet bsg <br /> Free-product was noted in SB-3, which was placed in the area of the former UST <br />' excavation Feasibility studies should be conducted to evaluate possible <br /> remediation measures Excavation of contaminated soils has been a viable <br />' remedial alternative in this area and should be evaluated, as well as another <br /> remedial alternative <br />' Please conduct a survey and provide the location of all agricultural, industrial, <br /> domestic, municipal and other wells within a 2,000 foot radius of this site The <br /> construction of these wells, if known, should also be provided <br />�• If you have any questions or comments please se contact Lori Duncan at (209) <br /> 468-0337 <br /> Donna Heran, REHS, Director <br /> tEnvironmental Health Division <br /> L40_t C11 <br /> Lora Duncan, REHS Margare agono, REHS <br /> Site Mitigation Unit IV Supervisor, Unit IV <br /> 1 <br /> cc Eyark List, CVRWQCB <br /> 1 V iJoe Ramage, Ramage Environmental <br />