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ENVIRONMENTAL HEALTH DIVISION <br /> 304 E.Weber Ave.Third Floor <br /> R O. Box 388, Stockton CA 95201-038 <br /> Approve <br /> D ❑ <br /> Conditions S'tx c-oMAU• Y� _qle or-� <br /> Date—3. I by 240 `lTWZ <br /> ieoerj TC <br /> (IN"1/{/„-ndpi 6q (�, )/'� 4$4� ASSOCIATES I N C. <br /> SUMMARY REPORT <br /> SUBSURFACE INVESTIGATION <br /> at <br /> N&S IRRIGATION <br /> 215 <br /> WEST MAIN STREET <br /> 1 RIPON,CALIFORNIA <br /> R QWAJ TbP 1 <br /> 1.0 INTRODUCTION <br /> l <br /> 1 '►1�, .-� 1 ( " " J This report summarizes procedures and practices utilized by ATC Associates;(formerly Smith <br /> VV , V •»z ti:, <br /> Technology) to investigate potential soil and groundwater contamination associated with the <br /> 1�ri�7it�f/PCV �J � t/ former underground storage tanks(USTs)located at 215 West Main Street, Ripon, California. <br /> ` 9 The investigation consisted of drilling two soil borings and collecting soil and groundwater <br /> �JI�1121�U'161� I�`�DI2�W►IlU�► :- "jA samples for analysis. <br /> IN V 5Ul( C�fwunl�WII I �t 1_1 Site Location <br /> " The site is located on the north side of West Main Street and the east side of Locust Avenue in <br /> I` Ripon,California,as shown on Figure 1. The location is a residential and commercial area. The <br /> site is currently occupied by N&S Irrigation. <br /> 1_2 Site Background and Previous Work <br /> In March 1990, one 1,500-gallon unleaded gasoline UST, one unleaded gasoline UST of <br /> i $il <br /> unknown size,and all associated piping and dispensing equipment were removed and transported <br /> 1 off-site. Laboratory analysis of soil samples collected from beneath the former 1,500-gallon UST <br /> location indicated the presence of detectable concentrations total petroleum hydrocarbons. <br /> Discoloration of the Boll and a petroleum hydrocarbon odor were noted in the field. After the <br /> tanks were removed, the area of the former tanks was backfilled. Former-tank locations are <br /> shown on Figure 2.. <br /> � ( •r, a <br /> ',= ATC Associates was retained by Mr.Paul Van Dyken to perform a subsurface investigation at the <br /> =ti <br /> .41 <br /> 4 site. This work was performed at the request of San Joaquin County.Public Health Services <br /> i J Environmental Health Division(PHS/EHD). <br /> +°�`. — 2.0 METHOD AND PROCEDURES <br /> a� All work described herein was performed in accordance with Smith Technology's Workplan for <br /> Subsraface Investigation, dated October 29, 1997,which was approved with minor modifications <br /> -A1498INI4981Vepo W4.iA- 1 - <br />