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<br /> rBLIC HEALTH SERVICES opo
<br /> - PUBLIC .G
<br /> SAN JOAQUIN COUNTY <
<br /> jObi KHANNA M.D..M.P.H.
<br /> l ' Health Officer • �•., �a
<br /> > 4�iicpa`'
<br /> P.O.Box 2009 0 (1601 East;Hazelton Avenue) •Stockton, California 95201
<br /> (209) 468-3400 cc.pr
<br /> ��/
<br /> ATTN ROBERT CHASE
<br /> AUTO INVESTMENT CO ASSOCIATES
<br /> 6310 HIDDEN ACRES '
<br /> STOCKTON CA 95212 MOV 993
<br /> RE: /423 N. Madison SITE CODE: 1163457
<br /> 424 N. Van Buren SITE CODE: 2511
<br /> San Joaquin County Public Health Services Environmental Health Division (PHS-EHD) has reviewed the
<br /> March 1993 Quarterly Monitoring Report prepared by RESNA for the above referenced site.
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<br /> In this quarterly report,the monitoring wells were reported as being sampled on February 11, 1993 and upon
<br /> sample analysis the following Ievels of contaminants were confirmed. Monitoring Well 3 had .85 feet of free
<br /> product on the water; Monitoring Well 5 vas sampled and upon analysis was non detectable for all analyzed
<br /> contaminants; Monitoring Well 1 was sampled and upon analysis the following levels of contaminants were
<br /> confirmed-TPHg 3100 ppb, Benzene 41 ppb, Toluene 110 ppb, Ethyl Benzene 49 ppb, Xylenes 230 ppb;
<br /> Monitoring Well 2 was sampled and upon ianalysis the following levels of contaminants were confirmed-TPHg
<br /> r, 210 ppb, Benzene ND, Toluene 1.3 ppb9l Ethyl Benzene 1.1 ppb, Xylenes.19 ppb; Monitoring Well 4 was
<br /> sampled and upon analysis the following levels of contaminants were confirmed-TPHg 690 ppb,Benzene 5.7
<br /> ppb, Toluene 1.9 ppb, Ethyl Benzene 2.8 ppb, Xylenes 14 ppb; Monitoring Well 6 was sampled and upon
<br /> analysis the following levels of contaminants were confirmed-THPg 6500 ppb, Benzene 260 ppb,Toluene 56
<br /> ppb,Ethyl Benzene 59 ppb,Xylenes 290 ppb;Monitoring Well 7 was sampled and upon analysis the fallowing
<br /> levels of contaminants were confirmed-TPHg 19000 ppb, Benzene 850 ppb,Toluene 600 ppb, Ethyl Benzene
<br /> 400 ppb and Xylenes 970 ppb. These groundwater sample results indicate that the plume of groundwater
<br /> contamination has not been defined.
<br /> In addition, PHS/EHD has no record of the monitoring wells being sampled since the February 1993 event.
<br /> Pursuant to Section 2652(d)of the Underground Storage Tank Regulations (California Code of Regulations,
<br /> Title 23, Chapter 16) a quarterly monitoring report shall be submitted to PHS/EHD and the Central Valley
<br /> Regional Water Quality Control Board(CVRWQCB)until the investigation and cleanup of the site is deemed
<br /> adequate. The report is to show:
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<br /> -status of investigation and cleanup activities including the results of all investigations completed to
<br /> date;
<br /> - proposed continuing or next phase of investigation;
<br /> - method of cleanup proposed or implemented, schedules for the completion of the investigation of
<br /> the site and remediation;
<br /> - method and location of disposal of the released hazardous substances and any contaminated soil,
<br /> groundwater, or surface water;,
<br /> - manifest required for transport of hazardous substances;
<br /> - monitoring well data including groundwater elevation, ph, conductivity, gradient;
<br /> - analytical results of groundwater or soil sampling;
<br /> -site map showing the"zero line!of contamination,if known,and changes in the above measurements
<br /> over the last quarter.
<br /> A DIVWon of San Joaquin County Health fare Services
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