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"A <br /> M FROM REGIONIfCAL EPA A, TO 912094640138 '00C. . <br /> ,r,ro Of [aiao nia Department of Toxic Substances Control <br /> eei eeilv 's andu m <br /> To Date: June 9, 1992 <br /> Stephen Posner <br /> Associate Hazardous Materials Specialist <br /> Surveillance & Enforcement Branch <br /> Technical & support Services Branch <br /> From 855-7816 <br /> Subject: Technical Request For Review Of Workplan: Lustre-Cal <br /> Activities Requested <br /> Review workplan for soil sampling and analysis. <br /> T09B Review Activities <br /> Reviewed the document titled Work Plan for Soil Sampling <br /> and Analysis, Lustre-Cal Nameplate Corporation, dated <br /> April 29 , 1992, and prepared by the Mark Group Engineers & <br /> Geologists, Incorporated. <br /> Discussion/Analysis <br /> Memo to Mr. Rod Hunter <br /> Page 3 , Last Paragraph: Sampling five feet below a gravel <br /> filled sump may not be sufficient if the sump has been in use <br /> for a number of years. <br /> Page 4, First Paragraph: It states that " . . . it is assumed <br /> that borings will penetrate to a total depth of 40 feet. " Yet <br /> the paragraph describes stopping at 15 feet unless PID readings <br /> are positive at 15 feet. Consideration should be given to <br /> slant boring of one of the borings to obtain samples directly <br /> beneath the tank. Since the PID instrument is generally not <br /> sensitive to chlorinated alkanes, such as 1, 1, 1-TCA, other <br /> instruments should be considered. <br /> Page 4 & 5, Task 6. 0: The LUFT (Leaking Underground Fuel <br /> Tank) manual should be cited as the appropriate method for <br /> total petroleum hydrocarbons which is considered a modification <br /> of EPA Method 8015. SM5520 for total oil and grease is an <br /> unfamiliar number and a reference to the source document would <br /> be useful. <br /> No rationale is provided for selecting sampling locations. <br /> r <br /> L <br />