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i <br /> DESCRIPTIOti OF NVORK IN CALTRANS RIGHT-OF-WAY, <br /> NORTHBOUND I-5 OFF R NIP -kT BENJANILN HOLT DRIVE <br /> The San Joaquin Countv Em ironmental Health Department {Countvl requested that ARCO define <br /> the extent of hvdrocarbons in the groundwater to the west anti south of the ARCO site located <br /> at 2908 Benjamin Holt Drive On March 17 1993 BC submitted a letter to Caltrans requesting <br /> permission to install one groundwater monitoring well in the Caltrans nsht-ot-way between the <br /> northbound I-5 off ramp and the ARCO facility This request was verballv dented by Caltrans <br /> uung safety as the reason for dental On July 1, 1993 BC personnel requested a written denial <br /> of the access from Caltrans BC has not received a written denial ARCO installed two <br /> Cy <br /> =roundwater monitoring wells on the westernmost portion of the ARCO property in an attempt <br /> to define the lateral extent of hydrocarbons in the groundwater to the west Groundwater samples <br /> t-ollected from the well on the southwest portion of the site indicate that hydrocarbons are present <br /> in the groundwater to the southwest of the ARCO site beneath the Caltrans property The County <br /> has again requested that a groundwater monitonng well be installed in the Caltrans nght-ol-way <br /> to define the extent of hydrocarbons in the groundwater The monitoring well would be installed <br /> in the location shown on FiL ure 1 The monitonng well would be constructed as illustrated to <br /> Figure 2 The well installation will take approximately 8 hours and the well would be sampled <br /> on a quarterly basis Well sampling takes about one hour to complete each quarter <br />• <br />