Laserfiche WebLink
W7- - <br /> grown <br /> and Candwt:,i1 <br /> �r S CGiSuizant^ <br /> cramr.^.;p <br /> C1Id0:0id y5d1a'!7y? <br /> -9•Fl444 OT23 <br /> 7"V 4916144_ r45] <br /> June 17, 1991 <` <br /> JUN 2 0 -171 <br /> Mr. Chuck Carmel 1,-;NV,ENTAD. P' ;:+;.:r <br /> ARCO Products Company PER"v1IT/SLERVICCS <br /> 2000 Alameda de las PuIgas <br /> Post Office Bcx 58I1 <br /> San Mateo, California 94402 017-5690-41/1 <br /> Subject: Status of Groundwater Extraction System, ARCO Station 2133, <br /> Stockton, California <br /> Dear Mr. Carmel: <br /> This letter presents the current status of the groundwater extraction system and the results of the <br /> groundwat;; discharge sampling at ARCO Products Company Station 2133, located at 2908 <br /> Benjamin Holt Drive,Stockton, CaUomia. Listed chronologically below is a summary of the <br /> activities related to the discharge of groundwater at the site. <br /> 4/16/91 Received the discharge permit from Frank Tucker at the City of Stockton (City), <br /> allowing discharge into the sanitary sewer. <br /> Calibrated the LEL meters and started pumping and discharging groundwater into the <br /> sanitary sewer. Within a few days of turning on the pumping system, the LEL meter <br /> in the well casing started shutting down the pump every few hours, due to high <br /> (greater than 10 percent) LEL readings. <br /> 4/18/91 Collected effluent water sample for laboratory analysis of total'petroleum hydrocarbons <br /> (TPH) and benzene,ethylbenzene, toluene, and xylenes (BETX). Table I presents a <br /> summary of laboratory results of detected constituents for the extraction system. The <br /> complete laboratory reports are included with this letter. <br /> Received notice from San Joaquin County that the pumping well must be sealed at the <br /> surface. <br /> 4125/91 Extraction system was turned off. The pump was not restarting properly because the <br /> pump was plugged. The pump was withdrawn from the well,cleaned,and then placed <br /> back in the well. <br /> Called the City with preliminary laboratory results of TPH and BETX analysis. The <br /> i City requested that the pump be turned on long enough to collect x sample for total <br /> "� toxic organics(TTO), but to leave the pump off otherwise. <br />