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PUBLIC HtALTH SERVICES PaU�N. <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION " <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 �lFi;R <br /> 2091468-3420 <br /> x <br /> JONATHAN MARLOWE i <br /> MARLOWE PROPERTIES <br /> P O BOX 150211 y <br /> SAN RAPHAEL CA 94915-0211 MAR 1 7 2000 <br /> RE: Marlowe Property SITE CODE: 1828 <br /> 4648 Waterloo Road <br /> Stockton CA 95215 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHSIEHD) <br /> has reviewed the "Quarterly Report— November 1999" dated December 30, 1999 that <br /> was submitted by Advanced GeoEnvironmental, Inc. (AGE) on behalf of the above <br /> referenced site and has the following comments. <br /> The Report documents the groundwater-monitoring event that took place on November <br /> 3, 1999. Analytical results of the water samples were at similar levels to the previous <br /> two events. A soil vapor extraction/air sparge system (SVEIAS) operated at this site <br /> from March 1999 through December 1999. The report estimates that a total of 158.92 <br /> gallons of petroleum hydrocarbon contamination was removed by the SVEIAS system. <br /> This represents 53% of the total mass of contamination estimated to be at the site <br /> (Revised Corrective Action Plan —January 1997). <br /> The Report recommends that groundwater-monitoring events at this site be reduced to <br /> semi-annual events. This has been discussed and agreed to with PHSIEHD. <br /> Groundwater monitoring should continue until this site is ready for closure. The Report <br /> also recommends at least one confirmation soil boring be advanced in the area of the <br /> most heavily concentrated soil contamination, near well VW-1. PHSIEHD agrees with <br /> this recommendation. Please proceed with preparation of a work plan for the <br /> confirmation soil sampling. <br /> If you have any questions or comments please call Lori Duncan at (209) 468-0337. <br /> Donna Heran, RENS, Director <br /> Environmental Health Division <br /> LznA a <br /> Lori Duncan, Senior REHS Margar6i Lagorio, ZHS <br /> LOP/Site Mitigation Unit IV Supervisor, Unit IV <br /> cc: Marry Hartzell, CVRWQCB <br /> Tim Cuellar, AGE <br /> A Division of San Joaquin County Health Care Services <br />