ARCHIVED REPORTS XR0012556 - Laserfiche WebLink

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Y y F T 4 L .. h .. .f . .'.,., 3s- f eF^t �. rl Nr. Chuck Carmel June 17, I991 Page 3 Collected effluent water sample for laboratory analysis of 770 and requested a standard two week turnaround from the laboratory. The laboratory reports for TTO are included with this letter. 518191 Responded in writing to San Joaquin Counrr with intent to seal well. The well was sealed on 5/20/;1. The LEL sensor was relocated to a position inside the vault in the lower third of the vault. 5120191 Called the City with TTO sample results. Brown and Caldwell was nifotmed that, although the results were well within the discharge limits,the City was concerned that at some time in the future the discharge concentration might be exceeded. The City requested that a proposal for some type of additional groundwater treatment be put in writing, and that no water be discharged until after the additional groundwater treatment is installed. 6/4/91 Called the City back after discussing with ARCO the City's request not to discharge. The City said that they will honor the permit and we could begin discharging again. ti 6/5191 Extraction system restarted. 6110191 Resampled extraction system for BETX and TPH. The results of this sample are not yet available. In addition, the LEL sensors were recalibrated. The average daily flow during this reporting period was 0.35 gallons per minum. The total flow for this period was 22,175 gallons. Vxt�� ?, l The following is a calculation of pounds per day of each constituent. rki . t 2L -. Q = Flow rate,gpm G 33 J tt�r thy_ i C = Concentration, µg/1 W = Amount of chemical discharged,lbs/day ; W= Q x 1,440 x 8.34 x C/(1,000,000)= 0.130 C at Q=0.35 gpm C u W lbs/dayQ I TPH 3.1 0.01 Benzene 0.59 0.0013 t Ethylbenzene 0.074 0.0003 I Toluene 0.150 0.0006 Xylenes 0.290 0.001 i Brown and Caldwell a,.