Laserfiche WebLink
PUBLrC HEALTH SERVICES oAR�ly...� <br /> �. 1 •.pG <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DMSION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 c�rc,FORN`P <br /> 209/468-3420 <br /> CARL KNOWLES NOV 0 7 2001 <br /> 1140 W HAMMER LN <br /> STOCKTON CA 95209 <br /> RE: 1140 W HAMMER LANE SITE CODE: 1124 <br /> STOCKTON CA <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) is the <br /> lead agency providing the oversight of the investigation and cleanup of releases from <br /> underground storage tanks (UST)within San Joaquin County. PHS/EHD has a contract with <br /> California State Water Resources Control Board (SWRCB) to conduct an UST corrective action <br /> program. <br /> To date, eight monitoring wells (MW) and four soil borings with groundwater grab samples have <br /> been completed at this site. Historically, MW#5 has evidenced the highest contaminant <br /> concentrations. Groundwater contamination appears to be localized in the area of MW#5. Due to <br /> the high concentrations of gasoline contaminants in the groundwater from MW#5, site closure <br /> cannot be granted. You were required to conduct a feasibility study to determine the best <br /> available technology that will mitigate the impact to groundwater in the area of MW#5. <br /> PHS/EHD discussed the Feasibility Study Report prepared by Ground Zero Analysis, Inc. with <br /> staff from the California Regional Water Quality Control Board (CRWQCB) on November 1, 2001. <br /> In that report four remedial alternatives for groundwater cleanup were evaluated. The remedial <br /> alternative selected was Oxygen Release Compound (ORC). <br /> It has not been demonstrated in San Joaquin County that ORC remediates groundwater <br /> contamination in a reasonable amount of time so other alternatives should be considered. <br /> PHS/EHD and the CVRWQCB staff have seen good remedial results using ozone injection and <br /> direct you to evaluate this alternative. <br /> Recently, MW#8 was destroyed due to a rise in groundwater and a flooded screen condition. <br /> This well was downgradient of MW#5 and must be replaced. The replacement well must be <br /> monitored and sampled quarterly until site closure is granted. <br /> If you have any further questions regarding this matter, contact Harlin Knoll at (209)468-3442. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Harlin Knoll, Senior REHS Margare4agorio, REhi <br /> LOP/Site Mitigation Unit IV Supervisor <br /> HK <br /> c: RWQCB, Central Valley Region-Marty Hartzell <br /> Ground Zero Analysis, Inc. <br /> A Division of San Joaquin County Health Care Services <br />