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LM <br /> San Joaquin Health Services Re: Re-Excavation/Resample Work Plan <br /> March 23, 1992= Page 3 of-3 2150 E. Fremont St. , Stockton, CA <br /> W <br /> We propose to separate the highly contaminated spoil from the <br /> .W remainder of the spoil and stockpile on site away from the excavation <br /> on plastic and cover with same. Having accomplished this, return the <br /> remaining spoil to the excavation, taking care to leave the middle <br /> `M third open. Then start excavating at a point approximately 12 feet <br /> south of the north end of the 10,000 gallon tank location, northerly <br /> 16- to a point approximately 12 feet past the southern end of the 12,000 <br /> gallon tank location, east and west a distance of 10 feet beyond the <br /> ._ existing boundry to a depth of 20 feet. (See attached drawings #2 and <br /> #3. ) The resulting excavation will be approximately 34 feet wide by <br /> 34 feet long by 20 feet deep. Estimated amount of spoil removed will <br /> be approximately 700 cubic yards, including the area taken up by the <br /> tanks. At the conclusion of excavating approximately six to eight <br /> soil samples will be taken at appropriate locations inside the pit <br /> area. At least three bottom and four side wall samples three to five <br /> feet up from the bottom. All samples will be analyzed for TPH-D and <br /> BTEX to LOFT specifications. (See drawings #2 and #3. ) All reports, <br /> recommendations, and conclusions will be made and submitted by Wm. <br /> Hunter and Associates. <br /> B. Remediation: After a total amount of spoil is ascertain od, the most <br /> appropriate method of soil disposition or remediation will be made. <br /> Many factors play roles in making this determination. An appropriate <br /> .. number of soil samples will be taken from the spoil , two per every <br /> 50 cubic yards removed. All spoil samples will be analyzed for THP-D <br /> and BTEX. <br /> C. Backfill : The best and most economical method of backfill will be <br /> decided upon after the actual excavation is completed, and soil <br /> dispositiop decisions are made. <br /> �. 7. Timing: Excavation and sampling can be scheduled to begin within two <br /> weeks upon approval of this work plan. The sample analyses results <br /> will be sent to San Joaquin Health Services/Environmental Health <br /> �. Division within ten working days. <br /> 8. Health and Safety Plan attached. Also Drawing #4, end view of excavation, <br /> .. existing and proposed. <br /> -.- JIM THORPE OIL, INC. <br /> ,r dba CH ART CVSTRC ION <br /> c ar orpe, dent <br />