REMOVAL_1988 CLOSURE IN PLACE - Laserfiche WebLink

Home Browse Search

KEI-J87-049B-1 November 6, 1987 Page 2 The soil samples were taken using a California-modified split- spoon sampler in the presence of Mr. William Snavely of the San Joaquin Local Health District. The samples were collected in brass liners which were sealed with aluminum foil and plastic caps, and were stored in a cooled ice chest for delivery to HAZCAT Organics Laboratory of San Carlos, California. The boring was then filled with concrete to the surface. At the request of Mr. Snavely, the samples were analyzed for total petroleum hydrocarbons (TPH) as gasoline and diesel, benzene toluene and xylene (BTX) . The results of the laboratory analyses showed concentrations of 11. 1 parts per million (ppm) TPH as gasoline for B-1 (6. 751) and 1.5 ppm for B-1 (10.51 ) . TPH as diesel was non-detectable for both samples. Copies of the laboratory analyses anj chain of custody form are attached to this report. The results of the soil analyses indicate that no contamination has occurred to the soil beneath the heating oil tank. A copy of this report should be sent to Mr. William Snavely of the San Joaquin County Health District. LIMITATIONS Soil deposits and rock formations may vary in thickness, lithology, saturation, strength and other properties across any site. In addition, environmental changes, either naturally- occurring or artificially-induced, may cause changes in groundwater levels and flow paths, thereby changing the extent and concentration of any contaminants. Our studies assume that the field and laboratory data are reasonably representative of the site as a whole, and assume that subsurface conditions are reasonably conducive to interpolation and extrapolation. The results of this study are based on the data obtained from the field and laboratory investigations. We have analyzed this data using what we believe to be currently applicable engineering techniques and principles in the Northern California region. we make no warranty, either expressed or implied, except that our services have been performed in accordance with generally accepted professional principles and practices existing for such work.