CAMBRIA
<br /> T?Hg Benzene MTBE
<br /> Site Flow Meter Cumulative Flaw TPHg Period Cumulative Benzene Period Cumulative MTBE Period Cumulative
<br /> Visit Reading Volume Rate Cone Removal Removal Cone Removal Removal Conc Removal Removal Active
<br /> (mm/ddl ) ( al) ( al) ( m) (Ppb) ( unds) (pounds)_ (ppb) (pounds) ( ounds) (ppb) ( unds) (Pounds) Wells Comments
<br /> System shutdown on 10/14/03 Carbon
<br /> changeoul performed on 10116104 and
<br /> i
<br /> 10/14/03 751 290 2,062,420 240 NS 246 5844 NS 0 554 8128 NS 256 7298 RW-lA system left off
<br /> System restarted-pumping into a
<br /> 06/0804 751,288 2,062,428 000 NS 000 5944 NS 0 000 8128 NS 000 7298 RW-1A baker tank on site"
<br /> 06/11/04 757,675 2,068,815 148 14,000 075 5851 3,800 0203 8149 8,900 047 7303 RW-1A
<br /> 0611804 772,17A 2,083,260 143 19,000 129 5874 4,400 0530 9102 12,000 145 7317 RW-1A
<br /> Resumed discharge to the sanitary
<br /> 0624/04 784,413 2,095,553 142 25,000 2.56 S900 5,800 0 595 82.61 18,000 185 7336 RW-1A sewer on 623104
<br /> System shut down pending carbon
<br /> 062804 802,540 2,1131680 315 NS 379 5938 NS 0 877 8349 NS 272 7363 RW 1A replacement.
<br /> 07/06/04 802,546 2,113,686 000 NS 000 5938 NS 0 000 9349 NS 000 7363 RW 1A
<br /> 0709104 809,260 2,120,400 155 20,000 112 5%9 4,400 0 747 9373 15,000 084 7371 RW-1A
<br /> 07/16/04 846,394 2,157,534 368 <25,000 387 5988 5,400 1673 8541 27,000 837 7455 RW-1A
<br /> 07/23104 878,520 2,189,660 319 43,000 1153 6103 5,400 1448 86.86 25,000 6.70 752.2 RW-1A
<br /> Abbreviations&Notes
<br /> TPHg=Total purgeable hydrocarbons as gasoline
<br /> MTBE=Methyl tert-butyl ether
<br /> Cone =Concentration
<br /> ppb=Parts per billion,egwvalent toµg/L
<br /> µg1L=Micrograms per liter
<br /> L=Liter
<br /> gpm=Gallons per minute
<br /> gal=Galion
<br /> g=Gram
<br /> NS=Not sampled
<br /> Mass removed based on the formula vohum extracted(gal)x Concentration(iig/L)x(g/l Obgg)x(pound/453 6g)x(3 785 Ugal)
<br /> When constituents are not detected,the concentration is assumed to be equal to half the detection limit in subsequent calculations
<br /> Vohmie removal data based on the forrrnda mass(pounds)x(density)-1(cmilg)x 453 6(glpound)x(U1000 cml)x(gal/3 785 Q
<br /> Density inputs TPHg=0 73 glcn},benzene=0 88 grem3,MTBE=0 74 glcmi
<br /> TPHg,benzene and MTBE analyzed by EPA Method 8260B
<br /> *Approximately 23 578 gallons of extracted groundwater was off hauled to Shell s Martinez Refinery usmg_vacuum trucks between June 11 and June 25,2004
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