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ctr <br /> Z Pacific Gas and Ele it*a�"ay Stockton Division Kan Girard <br /> 4040 West lane Manager <br /> PO.Box 930 <br /> Stockton,CA 95201. <br /> 209/942-1440 <br /> August 2, 1989 <br /> `=N, i ICiv j,�1 L M::, <br /> Ms. Antonia K. J. Vorster, Senior Engineer <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road <br /> Sacramento, California 95827-3098 <br /> Attention: Mr. Robert A. Evans <br /> Dear Ms. Vorster: <br /> Underground Tank Investigation, PG&E's Tracy Service Center <br /> 502 East Grant Line Road, Tracy, California <br /> I have attached for your review and comment the groundwater monitoring <br /> results of the latest round of sampling at the Tracy Service Center. <br /> The samples were collected on April 25, 1989 by PG&E from six <br /> groundwater monitoring wells (OW-1 through OW-6) located at the service <br /> center. <br /> Well OW-2, installed next to the location of the former underground <br /> gasoline storage tank, was the only monitoring well which-had <br /> detectable amounts of petroleum hydrocarbons or aromatic volatile <br /> organics. This is consistent with previous sampling results from <br /> January and December 1988. The results for well OW-2 indicated the <br /> presence of gasoline hydrocarbons at 1..2 milligrams per liter (mg/1) , <br /> benzene at 1.54 mg/l, ethylbenzene at 95 micrograms per liter (ug/1) , <br /> toluene at 22 ug/1 and xylenes at 11 ug/l. <br /> We are available to meet with you and your staff following your review <br /> to discuss any future activities which may be warranted at this site. <br /> Please feel free to contact Mr. Robert C. Karfiol at 415/972-7095 or <br /> Mr. Mike Bennett at 209/263-5215 if you have any questions regarding <br /> this matter. <br /> Sincerely, <br /> RCG:pb <br /> Attachment <br /> Mr. Val Siebal <br /> California Department of Health Services Region I <br /> Ms. Laurie Cottula <br /> San Joaquin County Local Health Department <br />