ARCHIVED REPORTS_XR0009529 - Laserfiche WebLink

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PROPERTY OWNER: George Lechich, P.O. Box 881, Stockton, CA 95201; (209) 466-5771 or (408) 372-5473 . CONTACT PERSON: George Lechich, (209) 466-5771 . LEGAL DESCRIPTION: Assessor' s parcel No . 135-450-23 , consisting of approximately 1/10th of an acre . Refer to prior reports for more details . DEPTH TO GROUNDWATER: Based upon the latest sampling event, (December, 3.995, ) the water table is about 12 ' bgl . The gradient is to the north/northeast, which agrees closely with regional data. BRIEF SUMMARY OF PRIOR WORK PERFORMED ON THE SITE : February, 1988 - A 500 gallon UST which had contained gasoline was removed from site. A soil sample taken at 13 ' bgl revealed the presence of petroleum hydrocarbons . Spoil was returned to hole & no further work done . February & March, 1994 - Three (3) groundwater monitoring wells were placed on the property. Wells #1 & #3 did not reveal any contamination in either soil or groundwater samples . However, MW-2, in a downgradient position from the removed UST, measured BTEX & TPH-G in both soil & water samples . Hydraulic gradient indicated to be to the north. For more details of that work, refer to the report titled "Site Assessment Report and Laboratory Analysis of Soil & Groundwater Samples to Define Contamination from Leaking UST" dated April 25 , 1994, prepared by Wm. J. Hunter & Associates . June, 1994 - First quarterly monitoring revealed the presence of BTEX & TPH-G in MW-2 ; levels were lower than first recorded. MW--2 & MW--3 still below detection levels . Gradient still to the north. September, 1994 - Second quarterly monitoring measured continued lower levels of BTEX; however, TPH-G had increased significantly. MW-2 & MW-3 still below detection limits . Hydraulic gradient has • shifted about 40 degrees to the northeast . 2