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� s � <br /> F I ... .. . IY <br /> PUBLIC HEALTH SERVICtS ,.. _.� ..oG <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D., M.P.H., Health Officer <br /> 4`'FORri� <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 APR 0 5 2001 <br /> LODI CITY CENTER 12 LLC JOSEPH K NEWFIELD <br /> C/O ANTHONY BARKETT 1900 LOWER SACRAMENTO RD <br /> 2800 MARCH LANE SUITE 360 WOODBRIDGE CA 95258 <br /> STOCKTON CA 95219 <br /> RE: Lodi Theater Project SITE CODE: 1371 <br /> 107 School Street <br /> Lodi CA 95240 <br /> San Joaquin County Public Health Services Environmental Health Division (PHS/EHD) <br /> has reviewed the "Remedial Action Work Plan Addendum" (RAP Addendum) dated <br /> March 19, 2001 that was prepared by Advanced GeoEnvironmental, Inc. on behalf of the <br /> above referenced site and has the following comments. <br /> The RAP Addendum proposes the destruction of five soil vapor extraction (SVE)wells <br /> and three air sparge (AS) wells currently being utilized as part of the on-site remediation <br /> system. The RAP Addendum further proposes to discontinue operation of the SVE-AS <br /> remediation system and switching to a less aggressive method of remediation, <br /> specifically Oxygen Release Compound (ORC), stating that continued operation of the <br /> SVE/AS system is not feasible due to site construction activities. <br /> On the morning of March 19, 2001, PHS/EHD was informed by AGE that the RAP <br /> Addendum had been prepared and would be submitted to PHS/EHD for review. <br /> PHS/EHD was also informed that AGE wished to begin implementation of the plan that <br /> day. PHS/EHD informed AGE that they would not receive approval of the RAP <br /> Addendum that day. An appointment was made for a monthly air sampling site <br /> inspection of the SVE/AS system for the afternoon of March 19, 2001. After PHS/EHD <br /> personnel arrived on-site, they were informed that ORC socks had already been placed <br /> in two of the wells. ORC was placed in a third well after PHS/EHD arrived. A fourth well <br /> could not be accessed. <br /> A review of analytical results from the air monitoring of the SVE/AS system indicates that <br /> the system is functional and doing a thorough job of removing and destroying petroleum <br /> hydrocarbon vapors from the subsurface of the site. Nine air sampling events have <br /> occurred since the system was put into operation in May 2000. Influent concentrations <br /> of total petroleum hydrocarbons as gasoline (TPHg) have decreased from 34,000 <br /> micrograms per litre (µg/I)to 15,000 µg/l, and benzene concentrations have decreased <br /> from 150 µg/I to 21µg/I. <br /> A Division of San Joaquin County Health Care Services <br />