FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

1%W1 INWV Geofogica(Technics Inc. 2741 Riva Road ,Md,,o,Callf=.95551 (209)538-6424/gxC#558-5852 TANK CLOSURE & SITE INVESTIGATION REPORT Hayres Egg Farms 12565 S. Manthey Lathrop, CA Project No. 646.2 June 26, 1998 1.0 EXECUTIVE SUMMARY On behalf Havres Egg Farms, Geological Technics Inc. has performed Tank Closure Investigation work on their property located at 12565 S. Manthey, Lathrop, California. During the course of the project, the scope of work changed and several additional issues were investigated that were not originally anticipated. The following is an outline of the work performed and a brief description of the results of the tests: 1. Undereround Storage Tanks - Investigate the areas having former underground tanks (USTs) to determine if tanks were still present in the ground and if contamination exists. Both soil and groundwater samples were collected and tested for petroleum hydrocarbons. No contamination was found that could be linked to the former USTs. 2. Aboveground Storage Tanks - Investigate the newly identified location of a former 10,000-gallon diesel AST to determine if contamination exists. Both soil and groundwater samples were collected and tested for petroleum hydrocarbons. Both diesel and gasoline compounds were found in the soil and groundwater. 3. Sum - Investigate the contents of the sump on the east side of the processing building and then pump it out to remove its contents. Collect a sample from the wastewater sump and test for TEPH-D and chlorinated solvents. Motor oil was found in the sample, but no solvents were detected. The sump was pumped out and found to have a couple feet of dirt and sludge in the bottom and a second chamber of unknown size and content. 4. Domestic Well - The domestic well was tested for bacteria, nitrate, and petroleum hydrocarbon compounds. The bacterial and nitrate were not detected, while both oil and gasoline were found in the water sample. 5. Retention Pond Soil —The soil of the retention pond was tested in two areas to determine if petroleum hydrocarbon contamination is present. Motor oil was found in both samples. 2.0 UNDERGROUND STORAGE TANK On May 31, 1998 Ray Kablanow of Geological Technics Inc. (GTI) and Don Light of Del- Tech Geotechnical Support Services personnel mobilized to the site to perform this investigation work. Steve Sasson of San Joaquin County was onsite during this work and gave directions as to sample locations and depths.