ARCHIVED REPORTS XR0007674 - Laserfiche WebLink

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Firestone Tire and Rubber company Page 2 Stockton, CA , work Plan • During the tank removal and soil sampling activities , aquin representative from the Public Health Services, San County, was on-site to record, inspect, and assist in the location of each soil sample rar�v�ngdafor brassb�ubeowrthinry lsoils Each soil sample was taken by scooped into a backhoe bucket At least two to three inches of soils were scraped from the surface of the soils in the backhoe samples were bucket, prbrassr tostubeewastsealed withAfter l teflon tape, capped, taken, each logged, and placed on ice The soil samples and chain-of-custody forms were then taken to a certified California laboratory for analysis . Analysis selected for each tank' s soil sample (s) was in accordance with the PHS permit . Results of the aandalysis are chalnaof�custodyin aborms are le 2 and copies of the laboratory sheets included in Attachment A. No water was noticed in the excavvatiioe�t�ring the rman, ofthe tank retovals • Groundwater was reported by Mr. be between 55 and 60 feet below grade at the site. Additionally, groundwater flow is in a southwest direction at the site . There are no known wells within the general area of the site; although, there may be a series of wells south of the site, along N. E1 Dorado St . (near or on Channel, Weber, Main and Market Sts . ) ly n These wells have apparentgroundtanks aorehydrocarbon site operation releases from other g activates . The soils in the general area of the tank excavations varied from general site fill to bebrown andteasilydvisibleense a�nmthertank The dense clay material is excavations . This material was encountered primarily in Tanks 8 thru 15 sites, and Tanks 6 and 16 . However, in Tank 6 , the bottom of the excavation and the soils retrieved during the soil sampling work were clays intermixed with fine sand material. Tank 5 excavation was a relatively homogeneous mix of silty/clay and clayey-sand. HoweveWat�haracter�.zede soil eastTan5,clayk dryrewxth trieved in assumed native Soils, was little plasticity. The underlying soils at the site are generally a clay-tYPe material as reported by Mr. Al Betterman, of t e PHS, ands y PHS inspection of a generalized summary soils map offices . The informaConflgained thetso�lgtypeMr. vbservedadur�ngand tthe generalized soil map tank excavation and soil sampling work.