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Noe PRwsm INDUSTRIES 1041 S. PERSHING AVE., STOCKTON, CALIFORNIA 95206 209/462-9911 NO. CALIF. 800/332-5900 INC. CALIFORNIA STATE LIC.467293 December 9, 1987 iJ San Joaquin Local Health District ENVIROME!�TAL HEALTH Environmental Health KRMIT/SERVICES P.0— Box 2009 Stockton, CA 95201 Attention: Donna Heran Re: Laura Scudders, 100 Valpico Road, Tracy, California Dear Donna, As per our phone conversation, I would like to outline a plan to complete the tank closure at Laura Scudders in Tracy. For the purpose of clarity, I would like to present a brief background of the project. After removal of one 10,000 gallon diesel tank, the initial soil sample results showed benzene, tolulene and zylene at non-detectable levels. The total extractable hydrocarbons were at 8200 ppm. After discussion with Doug Wilson and Harlan Knowl , it was agreed that deeper samples could be taken by hand auger. Two samples were taken by auger at both ends of the excavation. The first samples were taken at a depth of nineteen feet. The second set of samples was- taken at twenty four feet. A water sample was also taken from an adjacent well . The soil samples at nineteen feet and the water sample were analyzed by Trace Analysis Laboratory Inc. of Hayward. Trace is a state certified lab. The report from Trace Analysis Inc. (attached) shows all concentrations well below state action levels. All sample results are reported in U/KO or parts per billion. With this, Laura Scudders is requesting that they be allowed to remove 'soil at a depth of twenty feet, at which time one further soil sample can be taken to check for BTX and Total Hydrocarbons. A sample of the soil removed will also be taken to ascertain the need for aeration. The removed soil will then be left on site to be aerated by