Laserfiche WebLink
,�` ."mid` '' '�� �" � �. :�'' _,k�=°y 'fix'",a.`•. 'vm u m yayy�''�"'�'�"�`'",sc�v<'d'� �� � '"�.,, .. :4 <br /> Brown and Caldwell <br /> Consultants r% <br /> Sacramemo APR 2 3 1992 <br /> ��:;r ENV;RONMEr4TAI. HEALTH <br /> aaa <br /> April 27, 1992 PERMIT/SERVICES <br /> Mr. Chuck Carmel <br /> ARCO Products Company <br /> 2000 Alameda de las Pulgas <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-6673-04/1 <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 ext--ction system and the results of <br /> the groundwater discharge sampling at ARCO Products Company (ARCO) Station 2133, <br /> located at 2908 Benjamin Holt Drive in Stockton, California. Listed chronologically is a <br /> summary of the activities related to the discharge of groundwater at the site from January 16 <br /> through February 15, 1992. Table I presents a summary of the detected constituents for the <br /> extraction system to date. (The complete laboratory reports are included in Attachment A). <br /> 1/22/92 Collected effluent water sample for laboratory analysis of total petroleum <br /> hydrocarbons (TPH), and benzene, ethylbenzene, toluene and xylenes(BEM. <br /> 2/12/92 LEL monitoring sensor recalibrated and collected effluent water sample for analysis <br /> of BETX,TPH, and metals. <br /> T ii` verage flow rate during this period(31 days)was 4.4 gallons per minute. The average <br /> daily flow was 5,760 gallons.�The total volume of water discharged during the period was <br /> 178,560 gallons. <br /> Table 2 prr,.^.ents the average pcinds per day of each constituent discharged to the sanitary <br /> sewer. The constituent quantities were calculated using the formula below. The quantity of <br /> hydrocarbons being discharged is in compliance with the City of Stockton Wastewater <br /> Discharge Permit issued for this site. <br /> Q = Average flow rate, gpm <br /> C = Concentration, pg/1 <br /> W = Average amount of chemical discharged,lbs/day <br /> W = Q x 1,440 x 8.34 x C1(1,000,000,000) = 0.0001 C for Q=4.4 gptn <br /> The next monthly status letter will include the hiterval February 16 through March 15, 1992. <br /> 667rCORAESM73-U LM <br /> t; <br />