Laserfiche WebLink
�� <br /> He <br /> KLEINFELDER E, f�R 3 r; k - <br /> December 1, 19$9 <br /> File: 24-220030-A00 . <br /> Mr. William R. Snavely, R.S. <br /> Registered Sanitarian <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> SUBJECT: Tracy Community Memorial Hospital <br /> Soil Assessment Work Plan Addendum <br /> Dear Mr. Snavely: <br /> A soil assessment work plan for the Tracy Community Memorial Hospital was submitted <br /> on October 9, 1989, for the assessment of petroleum hydrocarbons in the soil adjacent to a <br /> third underground fuel storage tank. In that i work plan, Kleinfelder proposed advancing <br /> two vertical soil borings, in addition to an existing boring, next to the underground tank. <br /> San Joaquin County Public Health Services will not allow the tank to be closed in place <br /> based on the results of two vertical borings adjacent to the tank. As per your request, four <br /> soil samples will be collected directly underneath the storage tank from two angle borings. <br /> Kleinfelder will advance two soil borings, one"at a 45 degree.angle (SB-1), and one at a 60 <br /> degree angle (SB-2), underneath the tank. SB-1 will be advanced to an auger'depth of 27 <br /> feet and SB-2 wille advanced <br /> b to an auger depth of 33 feet. Two samples will be collected <br /> from SB-1 at depths of 26 and 32 auger feet (1.9 and 23 vertical feet). Two samples will be <br /> collected from SB-2 at depths of 20 and.26 auger feet (17 and 22 vertical feet). The actual <br /> location of borings will be dependent upon adequate work space provided for.the drilling <br /> crew,- but Kleinfelder will make every effort to advance the borings at the proposed <br /> locations shown on Plate 1. A cross sectional view of the angle borings and tank is shown <br /> on Plate 2. <br /> The four samples collected beneath the tank will be submitted for chemical analysis as per <br /> the original work plan. Ground water is anticipated approximately 12 feet below the <br /> ground surface, which is at or near the bottom of the tank. The four soil samples will be <br /> collected beneath the ground water surface. Kleinfelder does not recommend collecting <br /> ground water samples directly from the boring; but will attempt to do so if required by the <br /> County. Three ground water monitoring wells are present at the site. The local ground <br /> water flow direction is to the Northwest. MW-1 is approximately 35 feet downgradient of <br /> the tank and MW-2 is approximately 35 feet upgradient of the tank. The two wells monitor <br /> the water flowing past the tank, and to date,`TPH and BTEX constitents have not been <br /> detected above,laboratory reporting limits in the two wells. <br /> KLEINFELDER 9795 Business Park Drive, Sacramento, CA 95827, (916} 366-1701 �— <br />