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Linda g Thompson <br /> Project Manager ®�®�® <br /> Room PO-3038 <br /> (713) 293-2887 <br /> Remediation Technology Conoco Inc <br /> Fax (713) 293-3305 P O Box,4784 � _rI� <br /> HoustoXr 7 <br /> n,'T7210=4784 <br /> T �,--f;'/ICF <br /> February 15, 1994 3'' F F 8 22 PM 2. 38 <br /> Mr Harlan Knoll <br /> San Joaquin County PHS/EHD <br /> P O. Box 2009 <br /> Stockton, California 95201 <br /> RE: Quarterly Monitoring Report, Soil Remediation System, 4th Quarter 1993 <br /> 4325 East Washington Street <br /> Stockton, California 95201 <br /> Dear Mr Knoll <br /> Please find enclosed for your review the quarterly status report on the operation of the soil <br /> vapor extraction system during the fourth quarter of 1993 Approximately 3,455 pounds <br /> (561 gallons) of gasoline have been extracted during the most current reporting period A <br /> total of approximately 99,260 pounds (16,100 gallons) of hydrocarbons have been removed <br /> to date The operating efficiency (actual operating time versus the total time in the <br /> reporting period) of the system was 81% <br /> Our consultant, Sunnver Engineering and Construction, Inc , is investigating the accuaracy <br /> of the flow rate data The measured 105 cfm exceeds the unit's design capacity of 100 cfm <br /> However, the significantly lower inlet hydrocarbon concentrations offsets the impact of the <br /> slightly higher flow rate Our findings will be communicated to you in the next quarterly <br /> report <br /> This report represents the first consolidation of soil and groundwater information As <br /> discussed in last quarter's report, the first, second and fourth quarter reports will contain <br /> the required soil remediation information and general information regarding the groundwater <br /> activities The third quarter report will contain soil remediation and annual groundwater <br /> monitoring data No significant groundwater activities occured during this reporting period <br /> Should you have any questions or comments, please contact me at 7131293-2867 <br /> Sincerely, <br /> Linda S Thompson <br /> Project Manager <br />