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Former RING SERVICE STATION 4 <br /> 1001 E YOSEMITE,MANTECA <br /> I PAGE 2 <br /> A water sample was collected from a soil boring 10 feet from this supply well The analytical <br /> results of the water sample from the boring were 30,000 parts per billion (ppb) of total <br /> petroleum hydrocarbons as gasS%EHD �scbrned about tlieb of benzene, and 0s upP Y well�pb of �r <br /> tert-butyl ether(MTBE) Therefore,PHconcerned <br /> At the time when the groundwater sample was collected from the supply well ui September <br /> 1999,water usage at the station was relatively Low Since the station/food market is now in <br /> full operation,water usage at the site has dramatically increased The cone of depression <br /> from the increased pumping of the well could provide the vertical influence in groundwater <br /> ' for the contamination to migrate into the well <br /> The supply well is not constructed per current requirements for wells in San Joaquin County <br /> Also monthly bacteriological and other chemical testing will be required of this water system <br /> to ensure the water is potable Therefore,PHS/EHD recommends you connect to the City <br /> of Manteca water supply immediately Once connection to the City of Manteca water is <br /> made,the site supply well should be destroyed by licensed G57 contractor under permit <br /> and inspection of PHS/EI-D <br /> If you have any questions, please contact Jeffrey Wong at (209) 468-0335 <br /> Donna Heran,REHS,Director <br /> Environmental Health Division <br /> Agy&��� _� VJ <br /> Jeffrey Wong, RENS Margaret gono,RENS <br /> LOP/Site Mitigation Unit Supervisor <br /> c RWQCB,Central Valley Region- Marty Hartzell <br /> C Ramage Environmental-Joe Ramage <br /> 1 <br /> 1 <br />