================================================================ Minutes of HAWC Site WG EVO call of 10 September 2010 - 11am CST ================================================================ Agenda: - Subgroup 2.3 leader - restrictions of access to LMT - site permit status - status of electricity - internet - site engineering - water plan Slides were distributed by email. These minutes summarizes more the discussion than the material presented. Points marked with ** are not in the slides. - Subgroup 2.3 leader: Ibrahim Torres - restrictions of access to LMT: As usual access to HAWC requires three day notice to jnava@inaoep.mx. However, access to HAWC does not grant access to the LMT or mountain top area. Access to the mountain needs to be specified in the permit request and may apply only to the LAGO/RT5 area. Visitor access to HAWC (i.e. non HAWC personnel) needs to be applied for. ** Alberto should send this information to the whole collaboration e-list. ** - site permit status The request for the extension of the site permit, which expired in terms of construction on September 7, was sent last week. The semestral report to SEMARNAT is in advanced drafting and is expected to be submitted on Tuesday. The request for modifications, a more detailed document, is in early draft status. It requires defining a site layout. Today the head of PROFEPA is at the LMT site. A PROFEPA inspection of the HAWC site within two weeks is expected. Please keep everything tidy and help picking up garbage. - status of electricity Alberto, Ibrahim and Alberto Portilla, the site electrician, meet in CFE on Friday 3 September (leading to last week's call cancellation). CFE acknowledged the existence of proper topographic data. Current soil mechanics data has the information needed; a similar study should be made at the position of the transformer. These two items, together with INAOE performing the job and not requiring a bid package, removed items EVA-01, EVA-02 and PCN-01 from page 13 of the GEIC proposal. The engineering proposal cost goes down from 982,024 pesos to 555,968 pesos (43k USD approx). In relation to the timeline on page 14, CFE commented that they may be able to do the job in a month, but will require the calendar shown for contractual purposes. Next step is for INAOE to send an official request to CFE and proceed to sign the contract. In parallel we will be contacting CFE distribution and checking costs and specs of materials. Ibrahim is working on getting a 200W solar power system at the VAMOS site. ** We agreed on aiming for a full 800W solar system. ** The 80 kVA fuel generator of INAOE is been repaired. Depending on the timing of the CFE line it may or may not be needed. - Internet A bare optical fiber is now present at the guard gate (which has no power, yet). We will purchase the connecting equipment and start trenching from the guard gate to where the electrical trench is to begin. ** We should try to get a UPS system while the guard gate is powerless. ** - site civil engineering A civil engineering firm (SEGOR) meet at INAOE on August 27 and visited the site on 2 September. We inspected the extreme positions of the array, visualized the level of the flattened rectangle and discussed the location of the low and high water storage areas. SEGOR will send a quote on the work shortly. Balcazar, the civil engineer who proposed a pond option, was contacted and expressed interest in the job. A meeting at INAOE next week is been set. ** UNAM is contacting Ing. Orozco and its own engineering department. ** ** INAOE and UNAM should make an effort to unify the information provided to engineers. ** - water plan The water plan, as presented last year, includes a combination of trucking with on site acquisition systems. On site systems include LMT, the HAWC array and the HAWC access road. VAMOS was not foreseen but can become an early water acquisition system. The site presentation at Colorado considers two water storage area: a low one for collection of precipitated water and a high one for water delivery, LMT recollection. Filtration and transfer of clean water would be made at the high water area. A PeaceCorp volunteer will work the water systems from November. ** BUAP and INAOE will seek for getting two liners for water storage in unused VAMOS tanks. **